404Forbiden

✏️ Editing: bison.zip

PK��������\�(�޴�������AUTHORSnu��[�����������Authors of GNU Bison.

Bison was written primarily by Robert Corbett.

Richard Stallman made it Yacc-compatible.

Wilfred Hansen of Carnegie Mellon University added multicharacter
string literals and other features (Bison 1.25, 1995).

Akim Demaille rewrote the parser in Bison, and changed the back end to
use M4 (1.50, 2002).

Paul Hilfinger added GLR support (Bison 1.50, 2002).

Joel E. Denny contributed canonical-LR support, and invented and added
IELR and LAC (Lookahead Correction) support (Bison 2.5, 2011).

Paolo Bonzini contributed Java support (Bison 2.4, 2008).

Alex Rozenman added named reference support (Bison 2.5, 2011).

Paul Eggert fixed a million portability issues, arbitrary limitations,
and nasty bugs.

-----

This file is part of Bison, the GNU Compiler Compiler.

This program is free software: you can redistribute it and/or modify
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PK��������\|�wfK���K�����COPYINGnu��[�����������                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

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    (at your option) any later version.

This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

<program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.

The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
PK��������\]��y}l�}l�	��ChangeLognu��[�����������2015-01-23  Akim Demaille  <akim@lrde.epita.fr>

version 3.0.4
	* NEWS: Record release date.

2015-01-23  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2015-01-23  Akim Demaille  <akim@lrde.epita.fr>

build: re-enable compiler warnings, and fix them
	There are warnings (-Wextra) in generated C++ code:

ltlparse.cc: In member function 'ltlyy::parser::symbol_number_type
	  ltlyy::parser::by_state::type_get() const':
	  ltlparse.cc:452:33: warning: enumeral and non-enumeral type in
	  conditional expression
	      return state == empty_state ? empty_symbol : yystos_[state];

Reported by Alexandre Duret-Lutz.

It turns out that -Wall and -Wextra were disabled because of a stupid
	typo.

* configure.ac: Fix the stupid typo.
	* data/lalr1.cc, src/AnnotationList.c, src/InadequacyList.c,
	* src/ielr.c, src/print.c, src/scan-code.l, src/symlist.c,
	* src/symlist.h, src/symtab.c, src/tables.c, tests/actions.at,
	* tests/calc.at, tests/cxx-type.at, tests/glr-regression.at,
	* tests/named-refs.at, tests/torture.at:
	Fix warnings, mostly issues about variables used only with assertions,
	which are disabled with -DNDEBUG.

2015-01-22  Akim Demaille  <akim@lrde.epita.fr>

tests: c++: fix a C++03 conformance issue
	This fixes test 241 on xLC:

"input.y", line 42.11: 1540-0274 (S) The name lookup for "report" did not find a declaration.
	"input.y", line 42.11: 1540-1292 (I) Static declarations are not considered for a function call if the function is not qualified.

where report is:

static void
	  report (std::ostream& yyo, int ival, float fval)
	  {
	    yyo << "ival: " << ival << ", fval: " <<  fval;
	  }

and line 42 is:

%printer { report (yyo, $$,       $<fval>$); } <ival>;

It turns out that indeed this function must not be declared static,
	<http://stackoverflow.com/a/17662745/1353549>.  Let's put it into an
	anonymous namespace.

Reported by Thomas Jahns.
	http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00059.html

* tests/actions.at (Qualified $$ in actions): Don't use "static",
	prefer anonymous namespace.

2015-01-20  Akim Demaille  <akim@lrde.epita.fr>

tests: fix a title
	* tests/conflicts.at: De-overquote.

2015-01-20  Akim Demaille  <akim@lrde.epita.fr>

c++: reserve 200 slots in the parser's stack
	This is consistent with what is done with yacc.c and glr.c.  Because
	it also avoids that the stack needs to be resized very soon, it should
	help keeping tests about destructors more reliable.

Indeed, if the stack is created too small, very soon the C++ library
	needs to enlarge it, which means creating a new one, copying the
	elements from the initial one onto it, and then destroy the elements
	of the initial stack: that would be a spurious call to a destructor.

Reported by Thomas Jahns.
	http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00059.html

* data/stack.hh (stack::stack): Reserve 200 slots.
	* tests/c++.at: Remove traces of stack expansions.

2015-01-20  Akim Demaille  <akim@lrde.epita.fr>

tests: be more robust to unrecognized synclines, and try to recognize xlc
	Reported by Thomas Jahns.
	http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00059.html

* tests/synclines.at (AT_SYNCLINES_COMPILE): Rename as...
	(_AT_SYNCLINES_COMPILE): this.
	Try to recognize xlc locations.
	(AT_SYNCLINES_COMPILE): New.  Skips the test if we can't read the
	synclines.

2015-01-20  Akim Demaille  <akim@lrde.epita.fr>

tests: fix C++ conformance
	Reported by Thomas Jahns.
	http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00059.html

* tests/c++.at (Exception safety): Add missing include.
	Don't use const_iterator for erase.

2015-01-18  Akim Demaille  <akim@lrde.epita.fr>

build: fix some warnings
	Reported by John Horigan.
	http://lists.gnu.org/archive/html/bug-bison/2015-01/msg00034.html

* src/graphviz.c, src/symtab.h: Address compiler warnings.

2015-01-16  Akim Demaille  <akim@lrde.epita.fr>

build: avoid infinite recursions on include_next
	On MacOS X 10.5 PPC with Apple's GCC 4.0.1:

% uname -a
	  Darwin aria.cielonegro.org 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:0
	  1 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC Power Macintosh
	  % gcc --version
	  powerpc-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5493)
	  Copyright (C) 2005 Free Software Foundation, Inc.
	  This is free software; see the source for copying conditions.  There is NO
	  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

building in place enters into an infinite recursion on "#include_next":

% gmake V=1
	  [snip]
	  depbase=`echo lib/math.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
	  gcc -std=gnu99    -I. -Ilib -I. -I./lib   -g -O2 -MT lib/math.o -MD -MP -MF $depbase.Tpo -c -o lib/math.o lib/math.c &&\
	  mv -f $depbase.Tpo $depbase.Po
	  In file included from lib/math.h:27,
	                   from lib/math.h:27,
	                   from lib/math.h:27,
	                   from lib/math.h:27,
	  [snip]
	                   from lib/math.h:27,
	                   from lib/math.h:27,
	                   from lib/math.c:3:
	  lib/math.h:27:23: error: #include nested too deeply
	  Makefile:3414: recipe for target 'lib/math.o' failed
	  gmake[2]: *** [lib/math.o] Error 1

Using -I./lib instead of -Ilib fixes the problem.

Reported by Pho.
	<https://lists.gnu.org/archive/html/bison-patches/2014-01/msg00000.html>

* Makefile.am (AM_CPPFLAGS): Use -I./lib instead of -Ilib.

2015-01-16  Akim Demaille  <akim@lrde.epita.fr>

doc: minor fixes
	* doc/bison.texi: Fix warnings about colon in reference names.
	* data/bison.m4, src/files.h: Fix comments.
	* doc/Doxyfile.in: update.

2015-01-15  Akim Demaille  <akim@lrde.epita.fr>

gnulib: strtoul is considered obsolete and now useless
	* bootstrap.conf: here.

2015-01-15  Akim Demaille  <akim@lrde.epita.fr>

c++: avoid warnings when destructors don't use $$
	* data/c++.m4: here.

2015-01-15  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2015-01-15  Akim Demaille  <akim@lrde.epita.fr>

version 3.0.3
	* NEWS: Record release date.

2015-01-15  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2015-01-13  Akim Demaille  <akim@lrde.epita.fr>

tests: split a large test case into several smaller ones
	* tests/conflicts.at (AT_CONSISTENT_ERRORS_CHECK): Move AT_SETUP/AT_CLEANUP
	into it, so that we don't skip non Java tests following a test case in Java.

2015-01-12  Akim Demaille  <akim@lrde.epita.fr>

package: a bit of trouble shooting indications
	* README-hacking: here.

2015-01-12  Akim Demaille  <akim@lrde.epita.fr>

doc: liby's main arms the internationalization
	Reported by Nicolas Bedon.
	<https://lists.gnu.org/archive/html/bug-bison/2014-11/msg00005.html>

* doc/bison.texi (Yacc Library): Document the call the setlocale.

2015-01-09  Akim Demaille  <akim@lrde.epita.fr>

bison: avoid warnings from static code analysis
	A static analysis tool reports that some callers of symbol_list_n_get
	might get NULL and not handle it properly.  This is not the case, yet
	we can suppress this pattern.

Reported by Mike Sullivan.
	<https://lists.gnu.org/archive/html/bug-bison/2013-12/msg00027.html>

* src/symlist.c (symbol_list_n_get): Actually it is never called
	to return 0.  Enforce this postcondition via aver.
	(symbol_list_n_type_name_get): Simplify accordingly.  In particular,
	discards a (translated) useless error message.
	* src/symlist.h: Adjust documentation.
	* src/scan-code.l: Style change.

2015-01-09  Akim Demaille  <akim@lrde.epita.fr>

c++: fix the use of destructors when variants are enabled
	When using variants, destructors generate invalid code.
	<http://lists.gnu.org/archive/html/bug-bison/2014-09/msg00005.html>
	Reported by Michael Catanzaro.

* data/c++.m4 (~basic_symbol): b4_symbol_foreach works on yysym:
	define it.
	* tests/c++.at (Variants): Check it.

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

style: tests: simplify the handling of some C++ tests
	* tests/c++.at: here.
	(Doxygen): Pass %define, so that files such as position.hh etc.
	are generated, instead of putting everything into input.hh.

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

c++: symbols can be empty, so use it
	The previous patches ensure that symbols (symbol_type and
	stack_symbol_type) can be empty, cleared, and their emptiness can be
	checked.  Therefore, yyempty, which codes whether yyla is empty or
	not, is now useless.

In C skeletons (e.g., yacc.c), the fact that the lookahead is empty is
	coded by "yychar = YYEMPTY", which is exactly what this patch
	restores, since yychar/yytoken corresponds to yyla.type.

* data/lalr1.cc (yyempty): Remove.
	Rather, depend on yyla.empty ().

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

c++: variants: don't leak the lookahead in error recovery
	During error recovery, when discarding the lookeahead, we don't
	destroy it, which is caught by parse.assert assertions.

Reported by Antonio Silva Correia.
	With an analysis and suggested patch from Michel d'Hooge.
	<http://savannah.gnu.org/support/?108481>

* tests/c++.at (Variants): Strengthen the test to try syntax errors
	with discarded lookahead.

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

c++: provide a means to clear symbols
	The symbol destructor is currently the only means to clear a symbol.
	Unfortunately during error recovery we might have to clear the
	lookahead, which is a local variable (yyla) that has not yet reached
	its end of scope.

Rather that duplicating the code to destroy a symbol, or rather than
	destroying and recreating yyla, let's provide a means to clear a
	symbol.

Reported by Antonio Silva Correia, with an analysis from Michel d'Hooge.
	<http://savannah.gnu.org/support/?108481>

* data/c++.m4, data/lalr1.cc (basis_symbol::clear, by_state::clear)
	(by_type::clear): New.
	(basic_symbol::~basic_symbol): Use clear.

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

c++: clean up the handling of empty symbols
	* data/c++.m4, data/lalr1.cc (yyempty_): Remove, replaced by...
	(empty_symbol, by_state::empty_state): these.
	(basic_symbol::empty): New.

2015-01-08  Akim Demaille  <akim@lrde.epita.fr>

c++: comment and style changes
	* data/c++.m4, data/lalr1.cc: More documentation.
	Tidy.
	* tests/c++.at (string_cast): Rename as...
	(to_string): this C++11 name.

2015-01-07  Akim Demaille  <akim@lrde.epita.fr>

c++: variants: comparing addresses of typeid.name() is undefined
	Instead of storing and comparing pointers to names of types, store
	pointers to the typeids, and compares the typeids.
	Reported by Thomas Jahns.
	<http://lists.gnu.org/archive/html/bug-bison/2014-03/msg00001.html>

* data/variant.hh (yytname_): Replace with...
	(yytypeid_): this.

2015-01-05  Akim Demaille  <akim@lrde.epita.fr>

c++: locations: complete the API and fix comments
	There are no support for += between locations, and some comments are wrong.
	Reported by Alexandre Duret-Lutz.

* data/location.cc: Fix.
	* doc/bison.texi: Document.
	* tests/c++.at: Check.

2015-01-05  Akim Demaille  <akim@lrde.epita.fr>

build: do not clean figure sources in make clean
	"make clean && make" fails in in-tree builds.

* doc/local.mk (CLEANDIRS): Replace with...
	(CLEANFILES): this safer list of files to clean.

2015-01-05  Akim Demaille  <akim@lrde.epita.fr>

build: don't try to generate docs when cross-compiling
	When cross-compiling don't run the generated bison to update the docs.
	Reported by Aaro Koskinen.
	<http://lists.gnu.org/archive/html/bison-patches/2014-03/msg00000.html>

* configure.ac (CROSS_COMPILING): New.
	* doc/local.mk: Use it.

2015-01-04  Akim Demaille  <akim@lrde.epita.fr>

package: fix a reporter's name
	* THANKS, build-aux/git-log-fix: s/Bernd Edligner/Bernd Edlinger/.

2015-01-04  Akim Demaille  <akim@lrde.epita.fr>

%union: fix the support for named %union
	Bison supports a union tag, for obscure reasons.  But it does a poor
	job at it, especially since Bison 3.0.
	Reported by Stephen Cameron and Tobias Frost.

It did not ensure that the name was not given several times.  An easy
	way to do this is to make the %union tag be handled as a %define
	variable, as they cannot be defined several times.

Since Bison 3.0, the synclines were wrongly placed, resulting in
	invalid code.  Addressing this issue, because of the way the union tag
	was stored (as a code muscle), would have been tedious.  Unless we
	rather define the %union tag as a %percent variable, whose synclines
	are easier to manipulate.

So replace the b4_union_name muscle by the api.value.union.name
	%define variable, document, and check.

* data/bison.m4: Make sure that api.value.union.name has a keyword value.
	* data/c++.m4: Make sure that api.value.union.name is not defined.
	* data/c.m4 (b4_union_name): No longer use it, use api.value.union.name.
	* doc/bison.texi (%define Summary): Document it.
	* src/parse-gram.y (union_name): No longer define b4_uion_name, but
	api.value.union.name.
	* tests/input.at (Redefined %union name): New.
	* tests/synclines.at (%union name syncline): New.
	* tests/types.at: Check named %unions.

2015-01-04  Akim Demaille  <akim@lrde.epita.fr>

package: bump to 2015
	Which also requires:

* gnulib: Update.

2014-12-31  Akim Demaille  <akim@lrde.epita.fr>

flex: don't trust YY_USER_INIT
	Reported by Bernd Edlinger and others.

* src/scan-gram.l: here.

2014-12-31  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: fix broken union when api.value.type=union and %defines are used
	Reported by Rich Wilson.

* data/c.m4 (b4_symbol_type_register): Append to b4_union_members,
	not b4_user_union_members.
	The latter invokes the former, but it is the former which is reinitialized
	to empty by b4_value_type_setup_union.
	* tests/types.at: Check it.

This reveals another bug, this time in the case of glr.c parsers.

* data/glr.c: Generate the header file before the implementation file,
	to be sure that the setup is run before what depends on it.

2014-12-31  Akim Demaille  <akim@lrde.epita.fr>

doc: fix missing xref
	Reported by xolodho.

* doc/bison.texi (Printer Decl): here.

2014-12-29  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2014-02-03  Akim Demaille  <akim@lrde.epita.fr>

location: remove some ugly debugging code traces
	* data/location.cc: here.

2014-02-03  Akim Demaille  <akim@lrde.epita.fr>

build: use abort to pacify compiler errors
	clang, with -DNDEBUG and -Werror fails on some functions that might
	lack a return.  This is because aver is just another assert, discarded
	with -DNDEBUG.  So use abort.

* src/muscle-tab.c, src/scan-skel.l: here.

2014-02-03  Akim Demaille  <akim@lrde.epita.fr>

package: bump to 2014
	* AUTHORS, ChangeLog-2012, Makefile.am, NEWS, PACKAGING, README,
	* README-alpha, README-hacking, THANKS, TODO, bootstrap.conf,
	* build-aux/darwin11.4.0.valgrind, build-aux/local.mk,
	* build-aux/update-b4-copyright,
	* build-aux/update-package-copyright-year, cfg.mk, configure.ac,
	* data/README, data/bison.m4, data/c++-skel.m4, data/c++.m4,
	* data/c-like.m4, data/c-skel.m4, data/c.m4, data/glr.c, data/glr.cc,
	* data/java-skel.m4, data/java.m4, data/lalr1.cc, data/lalr1.java,
	* data/local.mk, data/location.cc, data/stack.hh, data/variant.hh,
	* data/xslt/bison.xsl, data/xslt/xml2dot.xsl, data/xslt/xml2text.xsl,
	* data/xslt/xml2xhtml.xsl, data/yacc.c, djgpp/Makefile.maint,
	* djgpp/README.in, djgpp/config.bat, djgpp/config.sed,
	* djgpp/config.site, djgpp/config_h.sed, djgpp/djunpack.bat,
	* djgpp/local.mk, djgpp/subpipe.c, djgpp/subpipe.h,
	* djgpp/testsuite.sed, doc/bison.texi, doc/local.mk, doc/refcard.tex,
	* etc/README, etc/bench.pl.in, etc/local.mk,
	* examples/calc++/calc++.test, examples/calc++/local.mk,
	* examples/extexi, examples/local.mk, examples/mfcalc/local.mk,
	* examples/mfcalc/mfcalc.test, examples/rpcalc/local.mk,
	* examples/rpcalc/rpcalc.test, examples/test, examples/variant.yy,
	* lib/abitset.c, lib/abitset.h, lib/bbitset.h, lib/bitset.c,
	* lib/bitset.h, lib/bitset_stats.c, lib/bitset_stats.h,
	* lib/bitsetv-print.c, lib/bitsetv-print.h, lib/bitsetv.c,
	* lib/bitsetv.h, lib/ebitset.c, lib/ebitset.h, lib/get-errno.c,
	* lib/get-errno.h, lib/lbitset.c, lib/lbitset.h, lib/libiberty.h,
	* lib/local.mk, lib/main.c, lib/timevar.c, lib/timevar.def,
	* lib/timevar.h, lib/vbitset.c, lib/vbitset.h, lib/yyerror.c,
	* m4/bison-i18n.m4, m4/c-working.m4, m4/cxx.m4, m4/flex.m4,
	* m4/timevar.m4, src/AnnotationList.c, src/AnnotationList.h,
	* src/InadequacyList.c, src/InadequacyList.h, src/LR0.c, src/LR0.h,
	* src/Sbitset.c, src/Sbitset.h, src/assoc.c, src/assoc.h,
	* src/closure.c, src/closure.h, src/complain.c, src/complain.h,
	* src/conflicts.c, src/conflicts.h, src/derives.c, src/derives.h,
	* src/files.c, src/files.h, src/flex-scanner.h, src/getargs.c,
	* src/getargs.h, src/gram.c, src/gram.h, src/graphviz.c,
	* src/graphviz.h, src/ielr.c, src/ielr.h, src/lalr.c, src/lalr.h,
	* src/local.mk, src/location.c, src/location.h, src/main.c,
	* src/muscle-tab.c, src/muscle-tab.h, src/named-ref.c,
	* src/named-ref.h, src/nullable.c, src/nullable.h, src/output.c,
	* src/output.h, src/parse-gram.c, src/parse-gram.y, src/print-xml.c,
	* src/print-xml.h, src/print.c, src/print.h, src/print_graph.c,
	* src/print_graph.h, src/reader.c, src/reader.h, src/reduce.c,
	* src/reduce.h, src/relation.c, src/relation.h, src/scan-code.h,
	* src/scan-code.l, src/scan-gram.h, src/scan-gram.l, src/scan-skel.h,
	* src/scan-skel.l, src/state.c, src/state.h, src/symlist.c,
	* src/symlist.h, src/symtab.c, src/symtab.h, src/system.h,
	* src/tables.c, src/tables.h, src/uniqstr.c, src/uniqstr.h,
	* tests/actions.at, tests/atlocal.in, tests/bison.in, tests/c++.at,
	* tests/calc.at, tests/conflicts.at, tests/cxx-type.at,
	* tests/existing.at, tests/glr-regression.at, tests/headers.at,
	* tests/input.at, tests/java.at, tests/javapush.at, tests/local.at,
	* tests/local.mk, tests/named-refs.at, tests/output.at, tests/push.at,
	* tests/reduce.at, tests/regression.at, tests/sets.at,
	* tests/skeletons.at, tests/synclines.at, tests/testsuite.at,
	* tests/torture.at, tests/types.at:
	here.

2014-01-03  Paul Eggert  <eggert@cs.ucla.edu>

doc: specify documentation encoding
	* doc/bison.texi: Add '@documentencoding UTF-8'; needed since the
	manual contains UTF-8 characters.  This will cause the .info files
	to contain UTF-8 quotes and the like, which should be OK nowadays.
	Add @documentlanguage while we're at it.

2013-12-09  Akim Demaille  <akim@lrde.epita.fr>

package: install the examples
	Currently, we do not install the various examples extracted from the
	documentation.  Let's do it, as they are useful starting points.

* configure.ac: When --enable-gcc-warnings is set, enable ENABLE_GCC_WARNINGS.
	* examples/extexi: No longer issue synclines by default.
	* examples/local.mk: Except if ENABLE_GCC_WARNINGS.
	* examples/calc++/local.mk, examples/mfcalc/local.mk,
	* examples/rpcalc/local.mk: Install the example files.

2013-12-09  Akim Demaille  <akim@lrde.epita.fr>

package: install README and the like in docdir
	* Makefile.am: here.

2013-12-09  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: fix the order of multiple declarations reports
	On

%token FOO "foo"
	  %printer {} "foo"
	  %printer {} FOO

we report

/tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
	   %printer {} "foo"
	            ^^
	  /tmp/foo.yy:3.10-11:     previous declaration
	   %printer {} FOO
	            ^^

* src/symtab.c (locations_sort): New.
	Use it.
	* tests/input.at (Invalid Aliases): Stress the order of diagnostics.

2013-12-09  Akim Demaille  <akim@lrde.epita.fr>

symbol: provide an easy means to compare them in source order
	* src/symtab.c (symbols_sort): New.
	(user_token_number_redeclaration): Taken from here.

2013-12-05  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-12-05  Akim Demaille  <akim@lrde.epita.fr>

version 3.0.2
	* NEWS: Record release date.

2013-12-05  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update
	* gnulib: here.

2013-12-04  Akim Demaille  <akim@lrde.epita.fr>

output: do not generate source files when late errors are caught
	Reported by Alexandre Duret-Lutz as "second problem" in:
	http://lists.gnu.org/archive/html/bug-bison/2013-09/msg00015.html

* bootstrap.conf: We need the "unlink" module.
	* src/files.h, src/files.c (unlink_generated_sources): New.
	* src/output.c: Use it.
	* tests/output.at: Check the case of late errors.

2013-12-04  Akim Demaille  <akim@lrde.epita.fr>

output: record what generated files are source or report files
	* src/files.h, src/files.c (output_file_name_check): Take an additional
	argument to record whether a file is a source or report file.
	* src/files.c (generated_file): New.
	(file_names, file_names_count): Replace with...
	(generated_files, generated_files_size): these.
	* src/scan-skel.l: Adjust.

2013-12-04  Akim Demaille  <akim@lrde.epita.fr>

output: do not generate source files when early errors are caught
	Reported by Alexandre Duret-Lutz as "second problem" in:
	http://lists.gnu.org/archive/html/bug-bison/2013-09/msg00015.html

One problem is that some errors are caught early, before the
	generation of output files, while others can only be detected
	afterwards (since, for instance, skeletons can raise errors
	themselves).

This will be addressed in two steps: early errors do not generate
	source files at all, while later errors will remove the files that
	have already been generated.

* src/scan-skel.l (yyout): Open to /dev/null when there are errors.
	* tests/output.at (AT_CHECK_FILES): Factored out of...
	(AT_CHECK_OUTPUT): this.
	Fuse the "SHELLIO" argument in the "FLAGS" one.
	Use $5 to denote the expected exit status.
	Add a test case for early errors.

2013-11-26  Akim Demaille  <akim@lrde.epita.fr>

xml: also use "%empty" with html output
	* data/xslt/xml2xhtml.xsl: No longer issue an Epsilon, display as in
	dot and text formats.

2013-11-26  Akim Demaille  <akim@lrde.epita.fr>

style: formatting changes
	* src/print-xml.c: here.

2013-11-26  Akim Demaille  <akim@lrde.epita.fr>

xml: also display %empty for empty right-hand sides
	* data/xslt/xml2dot.xsl, data/xslt/xml2text.xsl: Display %empty where needed.

2013-11-26  Akim Demaille  <akim@lrde.epita.fr>

reports: display %empty in the generated pointed-rules
	* src/print.c (print_core): Use %empty for empty rules.
	* src/print_graph.c (print_core): Ditto.
	* tests/conflicts.at, tests/output.at, tests/reduce.at: Adjust
	expectations.

2013-11-26  Akim Demaille  <akim@lrde.epita.fr>

news: YYERROR vs variants

2013-11-18  Akim Demaille  <akim@lrde.epita.fr>

style: scope reduction in lalr.cc
	* src/lalr.c: Shorten variable scopes.
	(lookahead_tokens_print): Use the same variable name in two loops
	iterating over the same structure.

2013-11-15  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: formatting changes
	* data/lalr1.cc: Fix indentation.

2013-11-15  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: fix the support of YYERROR with variants
	When variant are enabled, the yylhs variable (the left-hand side of
	the rule being reduced, i.e. $$ and @$) is explicitly destroyed when
	YYERROR is called.  This is because before running the user code, $$
	is initialized, so that the user can properly use it.

However, when quitting yyparse, yylhs is also reclaimed by the C++
	compiler: the variable goes out of scope.

Instead of trying to be too smart, let the compiler do its job: reduce
	the scope of yylhs to exactly the reduction.  This way, whatever the
	type of scope exit (regular, exception, return, goto...) this variable
	will be properly reclaimed.

Reported by Paolo Simone Gasparello.
	<http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00003.html>

* data/lalr1.cc (yyparse): Reduce the scope of yylhs.
	* tests/c++.at: We now pass this test.

2013-11-15  Akim Demaille  <akim@lrde.epita.fr>

tests: check $$'s destruction with variant, YYERROR, and no error recovery
	When variant are enabled, the yylhs variable (the left-hand side of
	the rule being reduced, i.e. $$ and @$) is explicitly destroyed when
	YYERROR is called.  This is because before running the user code, $$
	is initialized, so that the user can properly use it.

However, when quitting yyparse, yylhs is also reclaimed by the C++
	compiler: the variable goes out of scope.

This was not detected by the test suite because (i) the Object tracker
	was too weak, and (ii) the problem does not show when there is error
	recovery.

Reported by Paolo Simone Gasparello.
	<http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00003.html>

* tests/c++.at (Exception safety): Improve the objects logger to make
	sure that we never destroy twice an object.
	Also track copy-constructors.
	Use a set instead of a list.
	Display the logs before running the function body, this is more
	useful in case of failure.
	Generalize to track with and without error recovery.

2013-11-15  Akim Demaille  <akim@lrde.epita.fr>

tests: simplify useless obfuscation
	* tests/c++.at: $$ is not special for M4, there is no need to "escape"
	it.

2013-11-14  Akim Demaille  <akim@lrde.epita.fr>

skeletons: use better names when computing a "goto"
	* data/glr.c (yyLRgotoState): Name the symbol argument yysym, instead
	of yylhs.
	* data/lalr1.cc (yy_lr_goto_state_): Likewise.
	* data/lalr1.java (yy_lr_goto_state_): New, modeled after the previous
	two routines.
	Use it.

2013-11-12  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-11-12  Akim Demaille  <akim@lrde.epita.fr>

version 3.0.1
	* NEWS: Record release date.

2013-11-12  Akim Demaille  <akim@lrde.epita.fr>

aver: it is no longer "protected against NDEBUG"
	Apply the same rules for aver as for assert: no side effects,
	especially not important ones.

* src/AnnotationList.c, src/muscle-tab.c: Adjust aver uses to resist
	to -DNDEBUG.

2013-11-08  Akim Demaille  <akim@lrde.epita.fr>

parsers: rename YY_NULL as YY_NULLPTR to avoid conflicts with Flex
	Flex also defines YY_NULL (to 0).  Avoid gratuitous conflicts.

* data/c.m4 (b4_null_define): Rename YY_NULL as YY_NULLPTR.

* data/glr.c, data/lalr1.cc, data/location.cc, data/variant.hh,
	* data/yacc.c, src/parse-gram.c, tests/actions.at, tests/c++.at,
	* tests/cxx-type.at, tests/glr-regression.at, tests/headers.at,
	* tests/push.at, tests/regression.at:
	Adjust.

2013-11-05  Akim Demaille  <akim@lrde.epita.fr>

build: use Automake 1.14's non-recursive Makefile features
	* configure.ac: Require Automake 1.14.
	* examples/calc++/local.mk, examples/local.mk, examples/mfcalc/local.mk,
	* examples/rpcalc/local.mk, tests/local.mk: Use %D% and %C%.

2013-11-05  Akim Demaille  <akim@lrde.epita.fr>

build: restore maintainer-push-check
	* tests/local.mk: here.

2013-11-05  Akim Demaille  <akim@lrde.epita.fr>

c++: use __attribute__((__pure__)) to avoid warnings
	Building C++ parsers with -Wsuggest-attribute=const and
	-Wsuggest-attribute=noreturn triggers warning in generated code.

* data/lalr1.cc: Call b4_attribute_define.
	(debug_stream, debug_level): Flag as pure.
	* tests/headers.at (Several parsers): There are now more YY macros
	that "leak".

2013-11-05  Akim Demaille  <akim@lrde.epita.fr>

skeletons: update the handling of compiler attributes
	* data/c.m4 (b4_attribute_define): Instead of defining __attribute__,
	define YY_ATTRIBUTE conditionally.
	(YY_ATTRIBUTE_PURE, YY_ATTRIBUTE_UNUSED, _Noreturn): New.
	Use them.
	* data/glr.c: Use them.

2013-11-05  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2013-10-24  Akim Demaille  <akim@lrde.epita.fr>

style: use /* ... */ comments
	* src/complain.c: Here.

2013-10-24  Akim Demaille  <akim@lrde.epita.fr>

tests: skip C++ tests that are too demanding for some compilers
	Some tests now fail when compiled with G++ 4.3 or 4.4 on MacPorts.

* tests/local.at (AT_SKIP_IF_EXCEPTION_SUPPORT_IS_POOR): New.
	* tests/c++.at (Exception safety): Use it.

2013-10-22  Akim Demaille  <akim@lrde.epita.fr>

install: do not install yacc.1 when --disable-yacc
	* configure.ac (ENABLE_YACC): New conditional.
	(YACC_SCRIPT, YACC_LIBRARY): Remove.
	* lib/local.mk, src/local.mk: Use the former instead of the latter.
	* doc/local.mk: Use ENABLE_YACC to avoid installing yacc.1.

2013-10-22  Akim Demaille  <akim@lrde.epita.fr>

style: avoid tabs
	* src/scan-code.l: here.

2013-10-22  Akim Demaille  <akim@lrde.epita.fr>

c++: fix generated doxygen comments
	* configure.ac: Enable -Wdocumentation if supported.
	* data/lalr1.cc: Fix comments.

2013-10-22  Akim Demaille  <akim@lrde.epita.fr>

fix: uniqstr are already pointers
	* src/uniqstr.c (uniqstr_assert): Remove incorrect double indirection,
	and now useless cast.

2013-10-22  Paul Eggert  <eggert@cs.ucla.edu>

bison: pacify Sun C 5.12
	* src/scan-code.l (show_sub_message):
	Redo initializations to work around a bogus Sun C 5.12 warning.
	(parse_ref): Remove unreachable code that Sun C 5.12 complains about.
	* src/uniqstr.h (uniqstr_vsprintf): Use
	_GL_ATTRIBUTE_FORMAT_PRINTF (...)  instead of __attribute__
	((__format__ (__printf__, ...))).  Otherwise, Sun C 5.12
	complains about an unknown attribute.

2013-10-22  Paul Eggert  <eggert@cs.ucla.edu>

maint: git now ignores rpcalc
	* examples/rpcalc/.gitignore: Ignore rpcalc.

2013-10-22  Paul Eggert  <eggert@cs.ucla.edu>

build: examples/calc++/calc++ requires flex
	* configure.ac (FLEX_CXX_WORKS): New AM_CONDITIONAL.
	* examples/calc++/local.mk (examples/calc++/calc++):
	Build if FLEX_CXX_WORKS, not BISON_CXX_WORKS.

2013-10-22  Paul Eggert  <eggert@cs.ucla.edu>

maint: mention help2man, texinfo, apt-get
	* README-hacking: Add help2man, texinfo.
	Describe how to add packages if you're using Debian.

2013-10-22  Paul Eggert  <eggert@cs.ucla.edu>

maint: git now ignores .log and .trs files
	* .gitignore: Add *.log, *.trs.

2013-10-21  Akim Demaille  <akim@lrde.epita.fr>

tests: fix incorrect object construction
	Reported by Ken Moffat.
	http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00009.html

* tests/c++.at (Exception safety): Here.

2013-10-16  Akim Demaille  <akim@lrde.epita.fr>

glr: allow spaces between "%?" and "{" in predicates
	Reported by Rici Lake.
	http://lists.gnu.org/archive/html/bug-bison/2013-10/msg00004.html
	http://stackoverflow.com/questions/19330171/

* src/scan-gram.l: Do not try to be too smart when diagnosing invalid
	directives.
	* tests/glr-regression.at (Predicates): New test.

2013-10-16  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: "-Werror -Wno-error=foo" must not emit errors
	Currently "-Werror -Wno-error=foo" still turns "foo" warnings into errors.
	Reported by Alexandre Duret-Lutz.
	See http://lists.gnu.org/archive/html/bug-bison/2013-09/msg00015.html.

* src/complain.c (errority, errority_flag): New.
	(complain_init): Initialize the latter.
	(warning_argmatch): Extract the loop iterating on the flag's bits.
	Set and unset errority_flag here.
	(warnings_argmatch): -Wno-error is not the same as -Wno-error=everything:
	we must remember if category foo was explicitly turned in an error/warning
	via -W(no-)error=foo.
	(warning_severity): Use errority_flag.

* tests/input.at (Symbols): Just check --yacc, not -Wyacc, that's the
	job of tests on -W.
	(-Werror is not affected by -Wnone and -Wall): Rename as...
	(-Werror combinations): this.
	Tests more combinations of -W, -W(no-)error, and -W(no-)error=foo.
	* tests/local.at (AT_BISON_CHECK_WARNINGS): Don't expect -Werror
	to turn runs that issue warnings into runs with errors, as the
	warnings might be enforced as warnings by -Wno-error=foo, in which
	case -Werror does not change anything.

* doc/bison.texi (Bison Options): Try to be clearer about how
	-W(no-)error and -W(no-)error=foo interact.

2013-10-16  Akim Demaille  <akim@lrde.epita.fr>

comment changes
	* src/complain.h, src/complain.c: More documentation, more comments.

2013-10-04  Andreas Schwab  <schwab@linux-m68k.org>

location: fix EOF check
	* location.c (location_caret): Use int, not char, for values from
	getc.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

style: variant: remove empty line
	* data/variant.hh (b4_symbol_constructor_define_): Remove
	stray eol.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

glr: more assertions
	* data/glr.c (yyaddDeferredAction, yyglrShiftDefer, yypdumpstack):
	More assertions.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

glr: shorten scopes
	* data/glr.c (yyglrReduce): Define yyflag with its value.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

glr: formatting changes
	* data/glr.c: here.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

glr: better use of tracing macros
	* data/glr.c (yydestroyGLRState): Use YY_SYMBOL_PRINT instead of
	yy_symbol_print.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

examples: improve the output of the "variant" example
	* examples/variant.yy: Improve the printing of lists.

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

variant: remove useless assertion
	* data/variant.hh (move): Remove precondition assertion which is
	ensured by the first call of the body (this precondition is also one
	of "build").

2013-09-19  Akim Demaille  <akim@lrde.epita.fr>

tests: remove stray debugging traces
	* tests/atlocal.in: Remove traces.
	Be ready to remove conftest.dSYM generated on OS X.

2013-09-04  Akim Demaille  <akim@lrde.epita.fr>

tests: do not use grep -q
	Reported by Daniel Galloway.
	http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00020.html

* tests/java.at: Ignore grep's output instead.

2013-08-25  Paul Eggert  <eggert@cs.ucla.edu>

build: don't require flex for ordinary builds
	* configure.ac (LEX): Don't fail if this is lex, as flex is not
	required for ordinary builds.  Instead, issue a warning and
	substitute a no-op LEX.  Reported by Michael Felt in
	<http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00009.html>.

2013-08-25  Paul Eggert  <eggert@cs.ucla.edu>

maint: update .gitignore
	* .gitignore: Add *.eps, *.o, *.pdf, *.png, *.stamp, *~,
	.deps, .dirstamp.  Needed to suppress unwanted chatter from
	'git status' after a bootstrap build.

2013-08-24  Paul Eggert  <eggert@cs.ucla.edu>

build: port to pre-5.8.7 perl
	* examples/local.mk (extract): Omit -f from perl options.
	This doesn't work with perl versions before 5.8.7
	that are configured without USE_SITECUSTOMIZE.
	Reported by Michael Felt in
	<http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00006.html>.

2013-08-01  Akim Demaille  <akim@lrde.epita.fr>

tests: minor change to make it easier to test other skeletons
	* tests/c++.at (Variants): Pass the skeleton as argument.

2013-08-01  Valentin Tolmer  <valentin.tolmer@gmail.com>

uniqstr: fix assertion
	* src/uniqstr.c (uniqstr_assert): Really make sure str is a uniqstr,
	not just whether some uniqstr with the same content was registered.

2013-08-01  Akim Demaille  <akim@lrde.epita.fr>

build: ship the ASCII art figures
	We don't ship the *.txt files that are used to build the info
	file.
	Reported by Colin Daley.

* doc/figs/example.txt: New.
	* doc/local.mk (bison.info): Depend on the txt files.
	And ship them.

2013-08-01  Akim Demaille  <akim@lrde.epita.fr>

doc: prefer the ".gv" extension to ".dot"
	See http://marc.info/?l=graphviz-devel&m=129418103126092 for the
	motivation (basically, some word processor now uses *.dot).

* doc/figs/example-reduce.dot: Rename as...
	* doc/figs/example-reduce.gv: this.
	* doc/figs/example-shift.dot: Rename as...
	* doc/figs/example-shift.gv: this.
	* doc/figs/example.dot: Rename as...
	* doc/figs/example.gv: this.
	* doc/local.mk: Adjust.

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

version 3.0
	* NEWS: Record release date.

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

news: prepare 3.0
	* NEWS (3.0): Reorder.

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

tests: fix invalid assignment when using variants in C++11
	* tests/c++.at (Exception safety): In variant mode $$ is an instance
	of Object.  Assigning YY_NULL in C++98 is incorrect, but behaves ok,
	as it assigns YY_NULL=0 using Object::operator= (char v).  It is wrong
	in C++11 as there is operator for "$$ = nullptr".

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

yacc: beware of "uninitialized uses" warnings
	Again some issues with the fact that yylval is reported by GCC as
	possibly not initialized in some cases.  Here, the case at hand is the
	%destructor.

I am still not convinced that it is worth going all the trouble of
	using pragmas to disable temporarily some warnings, instead of just
	initializing the looking symbol once for all, but that's what Paul
	voted for, see
	<http://lists.gnu.org/archive/html/bison-patches/2012-10/msg00050.html>.

* data/c.m4 (b4_attribute_define): Define
	YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN, YY_IGNORE_MAYBE_UNINITIALIZED_END,
	YY_INITIAL_VALUE here, as we will need them in the generation of the
	destructor function, which is defined in yacc.c before yyparse, which
	was in charge of defining these macros.
	* data/yacc.c (b4_declare_scanner_communication_variables): Simplify:
	trying to factor the definitions of the case pure and impure is
	too complex.
	Actually, it is not even clear that this macro should really exist,
	as even the calls are complex.
	Be careful not to issue a lone ";", as this is a statement, and C90
	forbids declarations after statements ; so write
	"YY_INITIAL_VALUE(Decl;)", not "YY_INITIAL_VALUE(Decl);".

2013-07-25  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2013-07-03  Akim Demaille  <akim@lrde.epita.fr>

tests: skip C++ tests if we can't compile a simple program
	There are possible conflicts between gnulib replacement functions (in
	<stdio.h>) and their C++ wrappers (in <stream>).  Trying to address
	these in configure seems too hard, and I don't know how to fix the issue
	in gnulib.  Cowardly avoid the problem by skipping C++ tests when this
	happens.
	Reported by Stefano Lattarini.
	http://lists.gnu.org/archive/html/bug-bison/2013-06/msg00001.html

* tests/atlocal.in (BISON_CXX_WORKS): Also set it to "skip" if we can't
	compile a simple program using <stream>.
	* tests/local.at: Comment changes.

2013-07-03  Akim Demaille  <akim@lrde.epita.fr>

tests: fix 'find' portability issues
	Reported by Stefano Lattarini.
	http://lists.gnu.org/archive/html/bug-bison/2013-06/msg00000.html

* tests/output.at (AT_CHECK_OUTPUT): Use Perl instead.

2013-06-24  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-06-24  Akim Demaille  <akim@lrde.epita.fr>

version 2.7.91
	* NEWS: Record release date.

2013-06-24  Akim Demaille  <akim@lrde.epita.fr>

NEWS: prepare for 2.7.91
	* NEWS (2.7.91): Java push parsers.

2013-06-24  Akim Demaille  <akim@lrde.epita.fr>

java: rename YYMORE as YYPUSH_MORE for consistency with C
	http://lists.gnu.org/archive/html/bison-patches/2013-06/msg00008.html

* data/lalr1.java, doc/bison.texi, tests/javapush.at:
	s/YYMORE/YYPUSH_MORE.

2013-06-21  Akim Demaille  <akim@lrde.epita.fr>

tests: fix Java push failure when running with BISON_USE_PUSH_FOR_PULL
	* tests/javapush.at (Trivial Push Parser with api.push-pull verification):
	When push for pull is enabled, there is one such function generated.

2013-06-21  Akim Demaille  <akim@lrde.epita.fr>

style: minor changes in the Java tests
	* tests/java.at (AT_CHECK_JAVA_GREP): Ignore the exit status.
	* tests/javapush.at (AT_CHECK_JAVA_GREP): Be more alike the previous
	one.
	Formating changes.
	Remove stray debugging "jj" file.

2013-06-21  Akim Demaille  <akim@lrde.epita.fr>

java: push: do not reset the error counter
	* data/lalr1.java (parse): here, when in push-pull is in "both" mode.
	This breaks the test suite, for instance
	make check TESTSUITEFLAGS='-d 388 BISON_USE_PUSH_FOR_PULL=1'.
	More generally make maintainer-push-check.

2013-06-14  Akim Demaille  <akim@lrde.epita.fr>

build: add Valgrind suppression file for GNU/Linux
	* build-aux/linux-gnu.valgrind: New.
	* build-aux/local.mk: Ship it.
	* configure.ac: Use it.

2013-06-13  Dennis Heimbigner  <dmh@unidata.ucar.edu>

java: add push-parser support
	* data/lalr1.java: Capture the declarations as m4 macros to avoid
	duplication.  When push parsing, the declarations occur at the class
	instance level rather than within the parse() function.

Change the way that the parser state is initialized.  For
	push-parsing, the parse state declarations are moved to
	"push_parse_initialize()", which is called on the first invocation of
	"push_parse()". The %initial-action code is also inserted after the
	invocation of "push_parse_initialize()".

The body of the parse loop is modified to return values at appropriate
	points when doing push parsing.  In order to make push parsing work,
	it is necessary to divide YYNEWSTATE into two states: YYNEWSTATE and
	YYGETTOKEN. On the first call to push_parse(), the state is
	YYNEWSTATE. On all later entries, the state is set to YYGETTOKEN. The
	YYNEWSTATE switch arm falls through into YYGETTOKEN. YYGETTOKEN
	indicates that a new token is potentially needed.  Normally, with a
	pull parser, this new token would be obtained by calling "yylex()". In
	the push parser, the value YYMORE is returned to the caller. On the
	next call to push_parse(), the parser will return to the YYGETTOKEN
	state and continue operation.

* tests/javapush.at: New test file for java push parsing.
	* tests/testsuite.at: Use it.
	* tests/local.mk: Adjust.
	* doc/bison.texi (Java Push Parser Interface): New.

2013-06-11  Akim Demaille  <akim@lrde.epita.fr>

build: ship all the files, even if the C++ compiler is broken
	* examples/calc++/local.mk: Be sure to ship calc++.test even if
	the current C++ compiler is not sufficient to run the tests.

2013-06-05  Dennis Heimbigner  <dmh@unidata.ucar.edu>

style: comment changes in Java skeleton
	* data/lalr1.java: Here.

2013-06-03  Akim Demaille  <akim@lrde.epita.fr>

tests: fix a G++ warning
	* tests/c++.at: Use YY_NULL instead of 0 for the null pointer.
	And formatting changes.

2013-06-03  Akim Demaille  <akim@lrde.epita.fr>

build: fix a warning from clang
	* src/muscle-tab.c: Declare local functions static.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

version 2.7.90
	* NEWS: Record release date.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

style: syntax-check fixes
	* data/yacc.c, src/Sbitset.c, src/Sbitset.h, src/muscle-tab.h,
	* src/output.c, src/parse-gram.y, src/reader.c, src/symtab.c,
	* src/uniqstr.c, src/uniqstr.h: Fix space before parens.
	* cfg.mk (_space_before_paren_exempt): Add needed exceptions.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

xml: use %empty in the text output
	* data/xslt/xml2text.xsl: here.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

build: locally disable new GCC warnings that fail on Flex generated code
	* configure.ac: here.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

fix a memory leak
	* src/print-xml.c (num_escape_bufs): New.
	(print_xml): Be sure to release all the escape_bufs.

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-05-30  Akim Demaille  <akim@lrde.epita.fr>

build: be sure to include config.h first in the generated parser
	Using %code for config.h is wrong, as some headers will already have
	been included by Bison.  In some cases, e.g., glibc's string.h, this
	results in some declaration not being made for lack of definition of
	_GNU_SOURCE, which is performed by config.h.

* src/parse-gram.y: here.

2013-05-29  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: post-release administrivia
	  version 2.7.1
	  regen

2013-05-29  Petr Machata  <pmachata@redhat.com>

drop unused options --raw, -n, -e, --include and -I
	* --raw appears to be ignored.  It was marked as obsolete in the
	  commit ec3bc39, and documented as no longer supported as of 1.29
	  (2001-09-07).  Support for %raw appears to have been dropped in
	  e9955c83 on 2002-06-11, but --raw was kept around.  Maybe it's time
	  to drop it as well?

* Commit e9955c83 dropped support for %no-parser as well, and
	  converted it to option.  --no-parser was later dropped in 728c4be2
	  on 2007-08-12, but -n was kept around, probably as an omission.  All
	  three are documented as removed since 2.3b (2008-05-27).

* -e existed for a single day in 2001.  It was introduced in eeeb962b
	  on 2001-11-27.  The handling was removed in c7925b99 on 2001-11-28,
	  but "e" was kept in the list of short options.  Probably an
	  omission.

* --include appears to be dead code.  The option sets a variable, but
	  that variable is not used anywhere.  It was added in f6bd5427 on
	  2001-11-26 as a %-directive, with comments that it's not yet
	  implemented.  It was converted to a command-line option later, but
	  doesn't seem to ever have been actually implemented.

2013-05-28  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2013-04-22  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: always point to the first directive
	Some directives cannot be used several times (e.g., a given symbol may
	only have a single printer).  In case of repeated definitions, an
	error is issued for the second definition, yet it is not discarded,
	and becomes the definition used for the rest of the file.

This is not consistent with the idea that multiple definitions are not
	allowed: discard any repeated directive.

* src/symtab.c (symbol_type_set, symbol_code_props_set)
	(semantic_type_code_props_set, symbol_class_set, symbol_translation):
	Discard repeated directives.
	* tests/input.at (Default %printer and %destructor redeclared)
	(Per-type %printer and %destructor redeclared): Update expectations.

2013-04-22  Akim Demaille  <akim@lrde.epita.fr>

tests: factor test for printer/desctructor redefined
	* tests/input.at (Default %printer and %destructor redeclared):
	Introduce AT_TEST to factor.

2013-04-22  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: use appropriate location for useless precedence/associativity
	* src/symtab.c (symbol_precedence_set): Use prec_location, not
	location (which is the first occurrence of the symbol, possibly just
	%token).
	Also, as redefinitions are not allowed, keep the first values, not
	the subsequent ones.
	* tests/conflicts.at, tests/existing.at, tests/regression.at: Adjust.

2013-04-22  Akim Demaille  <akim@lrde.epita.fr>

tests: factor duplicate expected warnings
	* tests/existing.at: Instead of "t ? abc : aBc", write "a(t?b:B)c".

2013-04-19  Akim Demaille  <akim@lrde.epita.fr>

tests: enable -Wsign-compare and fix corresponding warnings
	-Wsign-compare was disabled for bison's own code, following gnulib's
	approach.  However, the generated parsers should not trigger such
	warnings.

Reported by Efi Fogel.
	http://lists.gnu.org/archive/html/help-bison/2013-04/msg00018.html

See also http://stackoverflow.com/questions/16101062 for the weird
	"-(unsigned)i" piece of code.

* configure.ac (warn_tests): Enable -Wsign-compare.
	* data/location.cc (position::add_): New.
	(position::lines, position::columns): Use it.
	* tests/actions.at (AT_CHECK_PRINTER_AND_DESTRUCTOR): Fix signedness issues.

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

muscle: check more cases of %define variables with code values
	* data/bison.m4 (b4_percent_define_check_kind): Fix overquotation.
	(api.location.type, api.position.type): Check they have code values here.
	* data/c++.m4 (api.location.type): No longer checked here.
	(parser_class_name): Check it here.
	* data/java.m4 (api.value.type, init_throws, lex_throws, parser_class_name)
	(throws, annotations, extends, implements): Check they have code values.
	* doc/bison.texi: Fix every incorrect occurrence of %define.
	Document the additional syntax for %define: code values.
	Document the additional syntax for -D/-F: string and code values.
	* tests/calc.at, tests/headers.at, tests/input.at, tests/java.at,
	* tests/local.at: Fix dependencies.

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

parser: do not convert $ and @ in code values of %define variables
	* src/parse-gram.y (value: "{...}"): Just strip the braces, but pass
	the value as is.

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

parser: no longer use the "braceless" non-terminal
	The purpose of this symbol was only to factor function calls.  As a
	result the actions were indeed simpler, but the grammar was somewhat
	uselessly obfuscated.  Get rid of this symbol, but introduce functions
	to simplify dependencies.

There is no (intended) changes of behavior here.

* src/parse-gram.y (strip_braces, translate_code(
	(translate_code_braceless): New.
	(braceless): Remove, use "{...}" instead, and one of the previous
	functions depending on the context.
	(STRING, "%{...%}", EPILOGUE): Declare as <code>, instead of <chars>,
	the difference between both is useless (well, I couldn't make sense of
	it, even after having read the initial commit that introduced them).
	(%union): Remove the now useless "chars" type.
	Adjust the printers.
	* src/scan-gram.l: Adjust.

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

style: avoid %{...%} in our parser
	* src/parse-gram.y (%{...%}): Split in %code and %code requires.
	* src/location.h: Add missing includes for self containedness.

2013-04-18  Akim Demaille  <akim@lrde.epita.fr>

style: use %code for local function declarations in our parser
	* src/parse-gram.y (version_check, gram_error, char_name, lloc_default):
	Move their prototypes from %{...%} to %code.
	(YYLLOC_DEFAULT, YY_LOCATION_PRINT): Move from %{...%} to %code.
	(current_lhs): Move its implementation to the epilogue.

2013-04-16  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-16  Akim Demaille  <akim@lrde.epita.fr>

muscle: check the kind of api.prefix, api.location.type
	* data/bison.m4: Check api.prefix.
	* data/c++.m4: Check api.location.type.
	* doc/bison.texi: Fix uses of api.value.type, api.prefix, api.location.type.
	Document {...} values for %define.
	* src/parse-gram.y: Fix use of api.prefix.
	* tests/calc.at: Fix uses of api.location.type.
	* tests/input.at: Check api.prefix, and api.location.type.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

version 2.7.1
	* NEWS: Record release date.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: enforce definition syntax for keyword variables
	* src/muscle-tab.c (muscle_percent_define_get_kind)
	(muscle_percent_define_check_kind): New.
	(muscle_percent_define_default): Variables with a default value are
	of "keyword" kind.
	(muscle_percent_define_flag_if, muscle_percent_define_check_values):
	Check that the variable is of keyword kind.
	* data/bison.m4: Likewise, but in M4.  That is to say...
	(b4_percent_define_default): Define the kind when the variable is undefined.
	(b4_percent_define_check_kind): Use a better error message.
	(_b4_percent_define_check_values, _b4_percent_define_check_values):
	Former "enum" variables should be defined using the keyword syntax.
	* doc/bison.texi: Update.
	A couple of fixes.
	* tests/input.at (%define keyword variables): New.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: let -D/-F support the three kinds of %define variable values
	See http://lists.gnu.org/archive/html/bison-patches/2013-04/msg00012.html

* src/getargs.c (getargs): Recognize {value} and "value" for -D and -F.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: minor refactoring
	* src/muscle-tab.c (muscle_percent_define_default): Reduce the scopes.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: minor simplification which uncovers a missing warning
	* src/muscle-tab.c (muscle_percent_define_ensure): Discover the virtues
	of || to factor conditionals.
	* NEWS: As api.pure is no longer flagged as "used" by accident,
	we now have warnings for useless definitions.
	* tests/calc.at: So remove api.pure settings when running C++ tests,
	since C++ skeletons use a pure interface.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: factor the field retrieval
	* src/muscle-tab.c (muscle_percent_define_get_raw): New.
	Use it where appropriate.
	(location_decode): No longer fetch the value from the table,
	take the value as argument.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: factor the handling of used variables
	* src/muscle-tab.c (muscle_percent_define_use): New, corresponding
	to b4_percent_define_use.
	Use it where appropriate.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: factor the computation of variable names
	* src/muscle-tab.c (muscle_name): New.
	Use it.
	Propagate "uniqstr" as value type instead of plain "char const *".

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: factor the kind check in M4
	* data/bison.m4 (b4_percent_define_check_kind): New.
	Use it to check api.token.prefix.
	* data/c++.m4: Check the kind of api.namespace.
	* doc/bison.texi: Update a reference to former 'namespace' variable.
	* tests/input.at ("%define" code variables): Check api.namespace.

2013-04-15  Akim Demaille  <akim@lrde.epita.fr>

muscle: factor conditionals on defined %define variables
	* data/bison.m4 (b4_percent_define_ifdef_): New.
	Use it where appropriate.

2013-04-11  Akim Demaille  <akim@lrde.epita.fr>

api.token.prefix: use code values
	* data/bison.m4: Remove useless (and incorrect: m4_* instead of b4_*)
	default assignment to api.token.prefix.
	Check that api.token.prefix is assigned code.
	* tests/input.at (%define code variables): New test.
	* NEWS, doc/bison.texi, tests/c++.at, tests/calc.at,
	* tests/java.at, tests/local.at: Adjust to use braces.

2013-04-11  Akim Demaille  <akim@lrde.epita.fr>

c++: fix several issues with locations
	Reported by Daniel Frużyński.
	http://lists.gnu.org/archive/html/bug-bison/2013-02/msg00000.html

* data/location.cc (position::columns, position::lines): Check for
	underflow.
	Fix some weird function signatures.
	(location): Accept signed integers as arguments where appropriate.
	Add operator- and operator+=.
	* doc/bison.texi (C++ position, C++ location): Various fixes
	and completion.
	* tests/c++.at (C++ Locations): New tests.

2013-04-11  Akim Demaille  <akim@lrde.epita.fr>

muscles: be sure that %code snippets are not glue together on a single line
	Recently "braceless" in the parser was changed so that an eol was no
	longer added to the value.  This is not correct when a %code is used
	multiple times, because the syncline of the next snippet might be
	appended to the last (and not ended) line of the previous snippet.

* src/muscle-tab.h (muscle_grow): Make it private.
	* src/muscle-tab.c (muscle_grow): Accept a fourth argument: a required
	terminator.
	Adjust callers.
	* tests/input.at (Multiple %code): New.

2013-04-11  Akim Demaille  <akim@lrde.epita.fr>

style: fix comments
	* tests/actions.at: Fix incorrect "prototype".

2013-04-10  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  glr.cc: fix a clang warning
	  maint: update copyright years
	  build: fix VPATH issue
	  build: avoid clang's colored diagnostics in the test suite
	  tests: please clang and use ".cc", not ".c", for C++ input
	  gnulib: update
	  skeletons: avoid empty switch constructs
	  lalr1.cc: fix compiler warnings
	  yacc.c: do not use __attribute__ unprotected
	  tests: style changes

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

api.value.type: use keyword/brace values
	Suggested by Joel E. Denny.
	http://lists.gnu.org/archive/html/bison-patches/2013-03/msg00016.html

* data/bison.m4 (b4_percent_define_get_kind): New.
	(b4_variant_flag): Check that api.value.type is defined as the 'variant'
	keyword value.
	* data/c.m4 (_b4_value_type_setup_keyword): New.
	(b4_value_type_setup): Use it to simplify reading.
	Use b4_define_silent.
	Decode api.value.type, including its type.
	(b4_value_type_define): Likewise.
	* data/c++.m4 (b4_value_type_declare): Adjust the decoding of api.value.type,
	taking its kind into account.
	* doc/bison.texi: Adjust all the examples to the new syntax.
	* NEWS: Ditto.
	* tests/types.at: Adjust

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

api.value.type: diagnose guaranteed failure with --yacc
	Instead of generating invalid C code, generate an error when --yacc and
	'%define api.value.type union' are used together.

* data/bison.m4: Issue an error in this case.
	* tests/types.at (%yacc vs. %define api.value.type union): New, check this
	error.
	* doc/bison.texi (Type Generation): Document it.
	* tests/output.at: Check that '-o y.tab.c' and '-y' behave equally
	wrt generated file names.
	* NEWS (Use of YACC='bison -y'): New.
	Promote the use of 'bison -o y.tab.c'.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

doc: style changes
	* doc/bison.texi (Destructor Decl, Printer Decl): Group series of %token
	and %type together.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

doc: display locations in error as recommended by GNU Coding Standards
	* doc/bison.texi (Actions and Locations): here.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

doc: api.value.type union
	* doc/bison.texi (Type Generation): New section.
	(Multi-function Calc): Convert to use api.value.type=union.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

doc: move the section about "%union" where types are discussed
	* doc/bison.texi (Union Decl): Move to...
	(Defining Language Semantics): here.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

doc: deprecate #define YYSTYPE in favor of %define api.value.type
	* doc/bison.texi: Convert examples with YYSTYPE to use api.value.type.
	Deprecate YYSTYPE.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

value type: accept "->" in type tags
	Provide a means to dereference pointers when defining tags.  One
	example could be:

%code requires
	  {
	    typedef struct ListElementType
	    {
	      union value
	      {
	        int intVal;
	        float floatVal;
	        char* charptrVal;
	      } value;

struct ListElementType* next;
	    } ListElementType;
	  }

%union
	  {
	    ListElementType* list;
	  }

%token <list->value.charptrVal> STRING
	  %token <list->value.intVal> INTEGER
	  %token <list->value.floatVal> REAL
	  %type <list> ElementList LiteralType

* src/scan-code.l, src/scan-gram.l: Accept "->" in tags.
	* tests/types.at: Add more test cases to cover this case.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

style: simplify the scanning of type tags
	* src/scan-gram.l: Remove the rule for simple tags: the "complex" case
	subsumes it.  It was more efficient, but duplicated the code for a
	negligible benefit.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

api.value.type: implement proper support, check, and document
	* data/c.m4 (b4_symbol_type_register, b4_type_define_tag)
	(b4_symbol_value_union, b4_value_type_setup_union)
	(b4_value_type_setup_variant, b4_value_type_setup):
	New.
	(b4_value_type_define): Use it to set up properly the type.
	Handle the various possible values of api.value.type.
	* data/c++.m4 (b4_value_type_declare): Likewise.
	* data/lalr1.cc (b4_value_type_setup_variant): Redefine.

* tests/types.at: New.
	Exercise all the C/C++ skeletons with different types of
	api.value.type values.
	* tests/local.mk, tests/testsuite.at: Use it.

* doc/bison.texi (%define Summary): Document api.value.type.
	* NEWS: Advertise it, together with api.token.constructor.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

m4: allow the definition of side-effect only macros
	* data/bison.m4 (b4_divert_kill, b4_define_silent): New.
	* data/c.m4: Comment change.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

variant: fix inconsistent quotation
	* data/variant.hh (b4_char_sizeof): De-overquote.
	(b4_value_type_declare): De-underquote.

2013-04-09  Akim Demaille  <akim@lrde.epita.fr>

m4: style changes in error messages
	* data/bison.m4: Use $0 to denote the current macro's name.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: fix a clang warning
	* data/glr.cc (b4_epilogue): Be sure to end with an end-of-line,
	so that the file does end with one.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

maint: update copyright years
	Run "make update-copyright".

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

build: fix VPATH issue
	* Makefile.am (update-b4-copyright, update-package-copyright-year): Fix
	path to build-aux.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

build: avoid clang's colored diagnostics in the test suite
	The syncline tests, which try to recognize compiler diagnostics,
	are confused by escapes for colors.

* configure.ac (warn_tests): New, to factor the warnings for both
	C and C++ tests.
	Add -fno-color-diagnostics to it.
	* tests/local.at (AT_TEST_TABLES_AND_PARSE): Do not remove glue
	together compiler flags.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

tests: please clang and use ".cc", not ".c", for C++ input
	When fed with foo.c, clang++ 3.2 answers:

clang: error: treating 'c' input as 'c++' when in C++ mode,
	                this behavior is deprecated

* tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Use *.cc and *.hh
	for C++.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

skeletons: avoid empty switch constructs
	Reported by Rob Conde.
	http://lists.gnu.org/archive/html/bug-bison/2013-03/msg00003.html

* data/c.m4 (b4_symbol_actions): Rename as...
	(_b4_symbol_actions): this.
	(b4_symbol_actions): New wrapper.
	Do not emit empty switches.
	Adjust all b4_symbol_actions callers.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: fix compiler warnings
	Reported by Rob Conde.
	http://lists.gnu.org/archive/html/bug-bison/2013-03/msg00003.html

* data/stack.hh (operator=, stack(const stack&)): Make this class
	uncopyable, i.e., "undefine" these operators: make them private and
	don't implement them.
	(clear): New.
	* data/lalr1.cc: Use it instead of an assignment.
	(parser): Make this class uncopyable.

2013-04-08  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: do not use __attribute__ unprotected
	Reported by Victor Khomenko.
	http://lists.gnu.org/archive/html/bug-bison/2013-04/msg00001.html

* data/glr.c (YYUSE, __attribute__): Fuse their definition into...
	* data/c.m4 (b4_attribute_define): this new macro.
	* data/yacc.c, data/glr.c: Use it.

2013-04-05  Akim Demaille  <akim@lrde.epita.fr>

api.namespace: demonstrate and use {...} values instead of "..." values
	* tests/c++.at, tests/input.at: Use "%define api.namespace {foo}" instead
	of using quotes.
	* tests/local.at (AT_SETUP_STRIP, AT_NAME_PREFIX): Recognize uses of
	braces instead of quotes.
	* doc/bison.texi: Use braces for api.namespace's values.

2013-04-05  Akim Demaille  <akim@lrde.epita.fr>

grammar: do not add a \n at the end of blocks of code
	Now that we use "braceless" (which is {...} blocks of code with
	initial and final braces stripped) to denote "short" values (such as
	api.namespaces), the added end-of-line is a nuisance.  As a matter of
	fact, this extra-safety was useless, as every expansion of "braceless"
	(aka, "user code") is followed by an end of line.

* src/parse-gram.y, src/parse-gram.c (braceless): Instead of replacing
	the final brace by \n, just delete the brace.

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

grammar: record the kind of %define variable values
	Provide a means to tell the difference between "keyword" values (e.g.,
	%define api.pull both), "string" values (e.g., %define file.name
	"foo"), and "code" values (e.g., %define api.namespace {calc}).

Suggested by Joel E. Denny.
	http://lists.gnu.org/archive/html/bison-patches/2013-03/msg00016.html

* src/muscle-tab.h, src/muscle-tab.c (muscle_kind, muscle_kind_new)
	(muscle_kind_string): New.
	(muscle_percent_define_insert): Take the kind as new argument.
	Insert it in the muscle table.
	Adjust callers.
	* src/getargs.c: Adjust callers.
	* src/parse-gram.y: Ditto.
	(content.opt): Remove, replaced by...
	(value): this new non-terminal, whose semantics value is stored
	in the new "value" union member.
	Provide a printer.
	Support values in braces in additions to keyword and string values.

fuse me

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

style: fix comments
	* src/muscle-tab.c (muscle_percent_define_ensure): Update obsolete
	comments.

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

grammar: style changes
	* src/parse-gram.y (PARAM_TYPE): Remove useless typedef guard.
	There's a header guard.
	Use 'yyo' with %printer.
	Use a consistent style for %union one-liners.

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

grammar: split %union to group together related aspects
	* src/parse-gram.y (INT): Fuse the %type and %token declaration.
	Move its %union right before its introduction.
	(%union): Split in several %unions, right before their use.

2013-04-04  Akim Demaille  <akim@lrde.epita.fr>

muscle: refactor
	* src/muscle-tab.c (muscle_lookup, muscle_entry_new): New.
	(muscle_insert, muscle_grow, muscle_find_const, muscle_find): Use them.

2013-04-03  Akim Demaille  <akim@lrde.epita.fr>

style: comment changes
	* src/muscle-tab.c: Move the documentation of public functions to...
	* src/muscle-tab.h: here.
	Fix comment consistency issues.

2013-04-03  Akim Demaille  <akim@lrde.epita.fr>

muscle: minor refactoring
	* src/muscle-tab.h (MUSCLE_INSERT_C_STRING): Use MUSCLE_INSERT_STRING.

2013-03-06  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-03-06  Valentin Tolmer  <nitnelave1@gmail.com>

gram: correct token numbering in precedence declarations
	In a precedence declaration, when tokens are declared with a litteral
	character (e.g., 'a') or with a identifier (e.g., B), Bison behaved
	differently: the litteral tokens would be numbered first, and then the
	other ones, leading to the following grammar:

%right A B 'c' 'd'

being numbered as such: 'c' 'd' A B.

* src/parse-gram.y (symbol.prec): Set the symbol number when reading the
	symbols.
	* tests/conflicts.at (Token declaration order: literals vs. identifiers):
	New.

2013-03-04  Akim Demaille  <akim@lrde.epita.fr>

maint: update autoconf submodule
	* submodules/autoconf: Up to master.
	No significant changes in the files we use (m4sugar.m4 and foreach.m4).

2013-03-04  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: no longer include the yacc category in -Wall
	It would be a pity to warn the users against Bison features...
	http://lists.gnu.org/archive/html/bison-patches/2013-02/msg00107.html

* src/complain.h, src/complain.c (Wall): Disable Wyacc.
	(Weverything): New (hidden so far) category which really denotes all
	the categories (what used to be Wall).
	(warnings_args, warnings_types): Adjust.
	(warning_argmatch): Now !none = Weverything and conversely, no longer Wall.
	* NEWS, doc/bison.texi, src/getargs.c: Adjust the documentation.
	* tests/input.at (-Werror is not affected by -Wnone and -Wall): Adjust
	by not using a -Wyacc type of warning.

2013-03-04  Akim Demaille  <akim@lrde.epita.fr>

grammar: no longer detect and cure missing semicolon at end of actions
	Bison 3.0 is already breaking backward compatibility with other
	features.  It is an appropriate time to drop this feature.  Note that
	it was disabled when --yacc is passed.  See
	http://lists.gnu.org/archive/html/bison-patches/2013-02/msg00102.html

Basically, revert e8cd1ad655bcc704b06fb2f191dc3ac1df32b796.

* src/scan-code.l (braces_level, need_semicolon, in_cpp): Remove.
	Remove every rule needed to detect and add missing semicolon.
	* tests/actions.at (Fix user actions without a trailing semicolon):
	Remove.
	* NEWS: Adjust.

2013-03-04  Akim Demaille  <akim@lrde.epita.fr>

build: stop using bison -y
	* Makefile.am (YACC): Pass -o y.tab.c, so that ylwrap is happy, and
	yet we don't pass --yacc to bison.
	(AM_YFLAGS): Disable Yacc warnings.

2013-02-23  Akim Demaille  <akim@lrde.epita.fr>

c++: rename b4_semantic_type_declare as b4_value_type_declare
	This is to match the names used in C and api.value.type, even if the
	parser actually defines semantic_type.

* data/c++.m4 (b4_semantic_type_declare): Rename as...
	(b4_value_type_declare): this.
	* data/variant.hh: Likewise.

2013-02-23  Akim Demaille  <akim@lrde.epita.fr>

news: typo
	* NEWS: here.

2013-02-23  Akim Demaille  <akim@lrde.epita.fr>

style: space changes in the tests
	* tests/local.at: here.

2013-02-22  Akim Demaille  <akim@lrde.epita.fr>

style: formatting changes in the doc
	* doc/bison.texi: Use @file where appropriate.

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

tests: fix invalid C++11 code
	* tests/c++.at (Object): Somehow instances of Object were assigned
	YY_NULL, which is 0 most of the time (that case passes), but is
	nullptr in C++11, and there is nothing in Object to support such an
	assignment (failure).  Use 0 as value, and provide the needed
	assignment operator.
	Also, use a more natural order within the class definition.

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

tests: fix failures with G++ 4.8 in Flex scanner
	* configure.ac (WARN_NO_NULL_CONVERSION_CXXFLAGS): Rename as...
	(FLEX_SCANNER_CXXFLAGS): this.
	Pass -Wno-zero-as-null-pointer-constant to G++ if it supports it.
	* examples/calc++/local.mk: Adjust.

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

style: rename variant private members
	* data/variant.hh (buffer, tname, as_, raw, align_me): Rename as...
	(yybuffer_, yytname_,yyas_, yyraw, yyalign_me): these.

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

style: space changes
	* data/variant.hh: Be sure to leave a space before arguments in function
	calls.

2013-02-19  Akim Demaille  <akim@lrde.epita.fr>

variant: fix G++ 4.4 warnings
	The changes by Théophile Ranquet about type punning issues need
	to be extend to in-place new to please G++ 4.4.7.

* data/variant.hh (variant::as_): New, factors the casts that avoid
	compiler warnings.
	(as, build): Use them.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

news: spell fixes
	* NEWS: here.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: factor and enhance messages about duplicate rule directives
	When reporting a duplicate directive on a rule, point to its first
	occurrence:

one.y:11.10-15: error: only one %empty allowed per rule
	   %empty {} %empty
	             ^^^^^^
	one.y:11.3-8: previous declaration
	   %empty {} %empty
	   ^^^^^^

And consistently discard the second one.

* src/complain.h, src/complain.c (duplicate_directive): New.
	* src/reader.c: Use it where appropriate.
	* src/symlist.h, src/symlist.c (symbol_list): Add a dprec_location member.
	* tests/actions.at: Adjust expected output.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

style: no longer use backquotes
	* tests/actions.at, tests/atlocal.in, tests/c++.at, tests/calc.at,
	* tests/conflicts.at, tests/existing.at, tests/glr-regression.at,
	* tests/input.at, tests/java.at, tests/local.at, tests/sets.at,
	* tests/synclines.at, doc/bison.texi, lib/libiberty.h, lib/timevar.h:
	Use single quotes.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

style: no longer use backquotes
	* README, REFERENCES, TODO, configure.ac, data/README, data/bison.m4,
	* data/c++.m4, data/c.m4, data/java.m4, data/lalr1.cc,
	* data/lalr1.java, data/yacc.c, doc/local.mk, etc/bench.pl.in,
	* src/conflicts.c, src/files.c, src/getargs.c, src/gram.h, src/lalr.c,
	* src/location.c, src/location.h, src/muscle-tab.c, src/muscle-tab.h,
	* src/output.c, src/parse-gram.c, src/parse-gram.y, src/print-xml.c,
	* src/print.c, src/reader.c, src/reduce.c, src/scan-skel.l,
	* src/symtab.h, src/system.h, src/tables.c:
	Use single quotes, as currently recommended by the GNU Coding Standards.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

style: no longer use backquotes in messages
	* src/getargs.c (usage): Use single quotes.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

doc: use %empty instead of /* empty */
	* doc/bison.texi: Change the comments into explicit %empty.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

doc: introduce %empty and -Wempty-rule
	* doc/bison.texi (Grammar Rules): Make it a @section which
	contains...
	(Rules Syntax): this new subsection (with the previous contents of
	"Grammar Rules".
	(Empty Rules): New subsection, extracted from the former
	"Grammar Rules".
	Document %empty.
	(Recursion): New a subsection of "Grammar Rules".
	Complete a few index entries.
	(Bison Options): Document -Wempty-rule.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

report: use %empty to denote empty rules
	* src/gram.c (rule_rhs_print): Use %empty for empty rules.
	* tests/conflicts.at, tests/regression.at, tests/sets.at: Adjust.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: %empty enables -Wempty-rule
	* src/complain.h, src/complain.c (warning_is_unset): New.
	* src/reader.c (grammar_current_rule_empty_set): If enabled -Wempty-rule,
	if not disabled.
	* tests/actions.at (Implicitly empty rule): Check this feature.
	Also check that -Wno-empty-rule does disable this warning.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

-Wempty-rule: diagnose empty rules without %empty
	* src/complain.h, src/complain.c (warning_empty_rule, Wempty_rule):
	New warning category.
	(warnings_args, warnings_types): Adjust.
	* src/reader.c (grammar_rule_check): Check the empty rules are
	flagged by %empty.
	* tests/actions.at (Implicitly empty rule): New.
	* tests/existing.at: Add expected warnings.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

tests: use %empty
	* tests/actions.at, tests/input.at, tests/reduce.at,
	* tests/regression.at:
	here.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

parser: use %empty
	Avoid that Bison's own use of "bison -Wall" trigger warnings.

* src/parse-gram.y: Use %empty for every empty rule.

2013-02-18  Akim Demaille  <akim@lrde.epita.fr>

grammar: introduce %empty
	Provide a means to explicitly denote empty right-hand sides of rules:
	instead of

exp:  { ... }

allow

exp: %empty { ... }

Make sure that %empty is properly used.

With help from Joel E. Denny and Gabriel Rassoul.
	http://lists.gnu.org/archive/html/bison-patches/2013-01/msg00142.html

* src/reader.h, src/reader.c (grammar_current_rule_empty_set): New.
	* src/parse-gram.y (%empty): New token.
	Use it.
	* src/scan-gram.l (%empty): Scan it.
	* src/reader.c (grammar_rule_check): Check that %empty is properly used.
	* tests/actions.at (Invalid uses of %empty, Valid uses of %empty): New.

2013-02-16  Akim Demaille  <akim@lrde.epita.fr>

getargs: minor simplification
	* src/getargs.c (flag_argmatch): Simplify the handling of "none".

2013-02-16  Akim Demaille  <akim@lrde.epita.fr>

style: move argument handling of -W into the diagnostics module
	This allows to reduce the number of public interfaces.

* src/getargs.c (--yacc): Use warning_argmatch instead of tweaking
	directly warnings_flag (which will be private).
	(warning_argmatch, warnings_argmatch): Move to...
	* src/complain.h, src/complain.c: here.

* src/getargs.h, src/getargs.c (warnings_args, warnings_types): Move to...
	* src/complain.c: here, now private.

* src/complain.h (severity, warnings_flag): Move to...
	* src/complain.c: here, now private.

2013-02-16  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: revamp the handling of -Werror
	Recent discussions with Joel E. Denny
	(http://lists.gnu.org/archive/html/bison-patches/2013-02/msg00026.html)
	show that it is desirable to tell the difference between an option
	that was explicitly disabled with -Wno-foo, as opposed to be left
	unset.  The current framework does not allow this.

Instead of having a first int to store which options are enabled, and
	another to store which are turned into errors, use an array that for
	each warning category tells its status: disabled, unset, warning,
	error.

* src/complain.h, src/complain.c (warning_bit): New enum.
	(warnings): Use it.
	(severity): New enum.
	(warnings_flag): Now an array of severity.
	(errors_flag): Remove, now done by warnings_flag.
	(complain_init): New function, to initialie warnings_flag.
	(warnings_are_errors): New Boolean, for -Werror.
	* src/complain.c (warning_severity): New.
	(warnings_print_categories, complains): Use it.
	* src/getargs.c (warning_argmatch): Adjust to use warnings_flag.
	(warnings_argmatch): Ditto.
	Handle -Werror and -Wno-error here.
	(getargs): Adjust.
	* src/main.c (main): Call complain_init.
	* tests/input.at (Invalid options): Add more corner cases.

2013-02-14  Akim Demaille  <akim@lrde.epita.fr>

options: simplify the handling of -W
	* src/getargs.c (warnings_argmatch, warning_argmatch): Simplify by
	replacing function arguments with their actual values.
	(WARNING_ARGMATCH): Remove, useless.
	Adjust callers.

2013-02-14  Akim Demaille  <akim@lrde.epita.fr>

options: don't accept "error=" for -f and -r
	* src/getargs.c (warning_argmatch, warnings_argmatch, WARNINGS_ARGMATCH):
	New.
	Use them for -W/--warning.
	They are copied from...
	(flag_argmatch, flags_argmatch, FLAGS_ARGMATCH): these.
	Simplify by removing the support for "error".
	* tests/input.at (Invalid options): New.
	* TODO (Laxism in Bison invocation arguments): Remove.

2013-02-14  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: factor the list of warning names
	* src/getargs.h, src/getargs.c (warnings_args, warnings_types): Make
	them public.
	* src/complain.h, src/complain.c (warnings_print_categories): Its
	only use outside complain.c was removed in a recent commit, so
	make it static.
	Simplify its implementation.
	Use warnings_args and warnings_types.
	* src/muscle-tab.c (muscle_percent_define_check_values): Make it
	silent.

2013-02-14  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: no longer pretty-print rules in error messages, carets suffice
	* src/gram.c (grammar_rules_useless_report): Let -fcaret handle the
	pretty-printing of the guilty rules.
	(rule_print): Inline in its only use.
	* tests/conflicts.at, tests/existing.at, tests/reduce.at,
	* tests/regression.at: Adjust.
	* NEWS: Document.

2013-02-14  Akim Demaille  <akim@lrde.epita.fr>

options: no longer document warnings when diagnosing an invalid -W
	The argmatch functions accept prefixes of the alternatives (like
	getopt does for long options).  Bison uses this to document the
	warning categories.  This is troublesome: it duplicates the --help
	documentation, it is not gettextized, it is displayed with ugly quotes
	(because argmatch uses it to display the list of possible answers),
	and it prevents straighforward uses of the tables of valid warning
	categories (for instance so that warning diagnostics end with the name
	of the warning).

The "hidden" option --trace uses the same trick, but it does not need
	to be translated, nor to be described in --help.

* src/getargs.c (warnings_args): Remove pseudo documentation.
	Comment changes.

2013-02-11  Akim Demaille  <akim@lrde.epita.fr>

tests: enlarge the allowed duration for calc tests
	Hydra "often" fails on this test:

252. calc.at:658: 252. Calculator %glr-parser api.pure
	parse.error=verbose %debug %locations %defines api.prefix="calc"
	%verbose %yacc %parse-param {semantic_value *result}
	%parse-param {int *count} (calc.at:658): FAILED

* tests/calc.at: Give 200s instead of 100s.
	Use AT_DEBUG_IF.

2013-02-11  Akim Demaille  <akim@lrde.epita.fr>

debug: improve the display of symbol lists
	* src/symtab.c (symbol_print): Remove useless quotes (the symbol already
	has quotes).
	Prefer fputs.
	* src/symlist.c (symbol_list_syms_print): Likewise.
	Fix separators.

2013-02-09  Akim Demaille  <akim@lrde.epita.fr>

style: minor changes
	* src/complain.c: Space changes.
	* src/reader.c: Comment changes.
	Avoid && in assertions.
	* src/location.c: Move comments to...
	* src/location.h: here.
	* src/symlist.h, src/symlist.c: Create a pseudo section for members
	that apply to the rule.

2013-02-08  Akim Demaille  <akim@lrde.epita.fr>

news: restructure, document variants for C++
	* NEWS: here.

2013-02-08  Akim Demaille  <akim@lrde.epita.fr>

c++: api.token.constructor requires api.value.type=variant
	Eventually it should also support "union".

* data/glr.cc: Move this check to...
	* data/c++.m4: here, as lalr1.cc is affected too.

2013-02-05  Akim Demaille  <akim@lrde.epita.fr>

build: restore C90 compatibility
	* src/parse-gram.y, src/parse-gram.c: Don't use // comments.

2013-02-05  Akim Demaille  <akim@lrde.epita.fr>

doc: use @group to improve page breaking
	* doc/bison.texi: here.

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

style: rename internal "stype" as "union_members" for clarity
	"stype" is quite unclear, and it also collides with the former %define
	variable that had the same name (replaced by api.value.type).

* src/parse-gram.y (stype): Rename as...
	(union_members): this.
	* data/bison.m4: Adjust.
	(b4_user_stype): Rename as...
	(b4_user_union_members): this.
	* data/c++.m4, data/c.m4: Adjust.
	* src/parse-gram.c: regen.

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

tests: improve the language independance layer
	* tests/local.at (_AT_LANG_DISPATCH): New, shamelessly stolen from
	Autoconf's _AT_LANG_DISPATCH.
	(AT_LANG_DISPATCH): New.
	(AT_YYERROR_FORMALS, AT_YYERROR_PROTOTYPE, AT_YYERROR_DECLARE_EXTERN)
	(AT_YYERROR_DECLARE, AT_YYERROR_DEFINE, AT_MAIN_DEFINE, AT_COMPILE)
	(AT_FULL_COMPILE):
	Use AT_LANG_DISPATCH instead of an ad hoc m4_case.

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

style: space changes in the parser
	* src/parse-gram.y: Fix spaces.

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

parser: use api.pure full
	* src/parse-gram.y: Use api.pure full instead of silly macro tricks.

2013-02-04  Akim Demaille  <akim@lrde.epita.fr>

style: use a for loop instead of a while loop, and scope reduction
	* src/reader.c (packgram): Improve readability.
	The parser calls grammar_current_rule_end at the end of every rhs,
	which adds a NULL to separate the rules.  So there is no need to
	check whether "p" is non-null before proceeding.

2013-02-01  Theophile Ranquet  <ranquet@lrde.epita.fr>

variants: stylistic change
	* data/variant.hh (tname): Respect the GNU Coding Standards for this
	pointer's declaration.

2013-02-01  Theophile Ranquet  <ranquet@lrde.epita.fr>

grammar: free the association tracking graph
	The graph introduced by Valentin wasn't free'd after use.

* src/symtab.c (assoc_free): New, clear the array of linked lists with...
	(linkedlist_free): This, new.
	(print_precedence_warnings): Call assoc_free when done.
	(print_assoc_warnings): Free used_assoc after use.

2013-02-01  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: use AT_FULL_COMPILE where possible
	* tests/c++.at (C++ Variant-based Symbol, Variants): Here.  Rename the
	generated input files to use .y instead of .yy, as a requirement for using
	AT_FULL_COMPILE instead of a combination of AT_BISON_CHECK and
	AT_BISON_COMPILE_CXX.

2013-02-01  Theophile Ranquet  <ranquet@lrde.epita.fr>

variants: avoid type punning issue
	This is based on what is recommended by both Scott Meyers, in 'Effective
	C++', and Andrei Alexandrescu and Herb Sutter in 'C++ Coding Standards'.

Use a static_cast on void* rather than directly use a reinterpret_cast,
	which can have nefarious effects on objects.  However, even though following
	this guideline is good practice in general, I am not quite sure how relevant
	it is when applied to conversions from POD to objects.  Actually, it might
	very well be the opposite: isn't this exactly what reinterpret_cast is for?
	What we really want *is* to transmit the memory map as a series of bytes,
	which, if I am correct, falls into the kind of "low level" hack for which
	this cast is meant.

In any case, this silences the warning, which will be greatly appreciated by
	anyone using variants with a compiler supporting -fstrict-aliasing.

* data/variant.hh (as): Here.
	* tests/c++.at (Exception safety, C++ Variant-based Symbols, Variants):
	Don't use NO_STRICT_ALIAS_CXXFLAGS (revert commit ddb9db15), as type punning
	is no longer an issue.
	* tests/atlocal.in, configure.ac (NO_STRICT_ALIAS_CXXFLAGS): Remove
	definition.
	* examples/local.mk (NO_STRICT_ALIAS_CXXFLAGS): Remove from AM_CXXFLAGS.
	* doc/bison.texi: Don't mention type punning issues.

2013-02-01  Theophile Ranquet  <ranquet@lrde.epita.fr>

todo: update
	Reformulate and give more details on my thoughts concerning the graphical
	visualization, and add an entry about a bug in the options processing for
	warnings as errors.

* TODO: Here.

2013-02-01  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-02-01  Akim Demaille  <akim@lrde.epita.fr>

location: pass the location first
	* src/location.h, src/location.c (location_print): For consistency
	with other data structures and other location_* routines, pass the
	location argument first.
	* src/complain.c: Adjust.
	(location_caret): Likewise.
	* src/parse-gram.y: Adjust.

2013-02-01  Akim Demaille  <akim@lrde.epita.fr>

symlist: use the right stream
	* src/symlist.c (symbol_list_syms_print): Use "f", not stderr.

2013-01-30  Akim Demaille  <akim@lrde.epita.fr>

tests: put two related tests together
	* tests/conflicts.at (Useless associativity warning): Move next
	to "Useless precedence warning".

2013-01-30  Akim Demaille  <akim@lrde.epita.fr>

news: name contributors
	* NEWS: here.

2013-01-30  Valentin Tolmer  <nitnelave1@gmail.com>

warnings: introduce -Wprecedence
	The new warning category "precedence" flags useless precedence and
	associativity.  -Wprecedence can now be used, it is disabled by default.
	The warnings about precedence and associativity are grouped into one, and
	the testsuite was corrected accordingly.

* src/complain.h (warnings): Introduce "precedence".
	* src/complain.c (warnings_print_categories): Adjust.
	* src/getargs.c (warnings_args, warning_types): Likewise.
	* src/symtab.h, src/symtab.c (print_associativity_warnings): Remove.
	* src/symtab.h (register_assoc): Correct arguments.
	* src/symtab.c (print_precedence_warnings): Print both warnings together.
	* doc/bison.texi (Bison options): Document the warnings and provide an
	example.
	* tests/conflicts.at, tests/existing.at, tests/local.at,
	* tests/regression.at: Adapt the testsuite for the new category
	(-Wprecedence instead of -Wother where appropriate).

2013-01-30  Akim Demaille  <akim@lrde.epita.fr>

build: avoid clang's colored diagnostics in the test suite
	The syncline tests, which try to recognize compiler diagnostics,
	are confused by escapes for colors.

2013-01-30  Akim Demaille  <akim@lrde.epita.fr>

build: please Clang++ 3.2+ on Flex scanners
	Clang++, with -Wall, rejects code generated by Flex (for C scanners):

CXX      examples/calc++/examples_calc___calc__-calc++-scanner.o
	  In file included from examples/calc++/calc++-scanner.cc:1:
	  error: implicit conversion of NULL constant to 'bool' [-Werror,-Wnull-conversion]
	  if ( ! ( (yy_buffer_stack) ? (yy_buffer_stack)[(yy_buffer_stack_top)] : __null) ) {
	       ~                                                                  ^~~~~~
	                                                                          false
	* configure.ac (WARN_NO_NULL_CONVERSION_CXXFLAGS): Compute it.
	* examples/calc++/local.mk (examples_calc___calc___CXXFLAGS): Use it.

2013-01-30  Valentin Tolmer  <nitnelave1@gmail.com>

grammar: record used associativity and print useless ones
	Record which symbol associativity is used, and display useless ones.

* src/symtab.h, src/symtab.c (register_assoc, print_assoc_warnings): New
	* src/symtab.c (init_assoc, is_assoc_used): New
	* src/main.c: Use print_assoc_warnings
	* src/conflicts.c: Use register_assoc
	* tests/conflicts.at (Useless associativity warning): New.

Due to the new warning, many tests had to be updated.

* tests/conflicts.at tests/existing.at tests/regression.at:
	Add the associativity warning in the expected results.
	* tests/java.at: Fix the java calculator's grammar to remove a useless
	associativity.
	* doc/bison.texi (mfcalc example): Fix associativity to remove
	warning.

2013-01-29  Valentin Tolmer  <nitnelave1@gmail.com>

grammar: warn about unused precedence for symbols
	Symbols with precedence but no associativity, and whose precedence is
	never used, can be declared with %token instead.  The used precedence
	relationships are recorded and a warning about useless ones is issued.

* src/conflicts.c (resolve_sr_conflict): Record precedence relation.
	* src/symtab.c, src/symtab.h (prec_nodes, init_prec_nodes)
	(symgraphlink_new, register_precedence_second_symbol)
	(print_precedence_warnings): New.
	Record relationships in a graph and warn about useless ones.
	* src/main.c (main): Print precedence warnings.
	* tests/conflicts.at: New.

2013-01-29  Theophile Ranquet  <ranquet@lrde.epita.fr>

variants: remove the 'built' assertions
	When using %define parse.assert, the variants come with additional variables
	that are useful for development purposes. One is a Boolean indicating if the
	variant is built (to make sure we don't read a non-built variant), and the
	other is a string describing the stored type. There is no need to have both of
	these, the string is enough.

* data/variant.hh (built): Remove.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

style: indentation fixes
	* src/parse-gram.y: here.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

maint: be sure to neutralize out-of-tree paths from our parser
	* tests/bison.in: Adjust to support fixed versions of ylwrap.

2013-01-29  Theophile Ranquet  <ranquet@lrde.epita.fr>

m4: generate a basic_symbol constructor for each symbol type
	Recently, there was a slightly vicious bug hidden in the make_ functions:

parser::symbol_type
	  parser::make_TEXT (const ::std::string& v)
	  {
	    return symbol_type (token::TOK_TEXT, v);
	  }

The constructor for symbol_type doesn't take an ::std::string& as
	argument, but a constant variant.  However, because there is a variant
	constructor which takes an ::std::string&, this caused the implicit
	construction of a built variant.  Considering that the variant argument
	for the symbol_type constructor was cv-qualified, this temporary variant
	was never destroyed.

As a temporary solution, the symbol was built in two stages:

symbol_type res (token::TOK_TEXT);
	  res.value.build< ::std::string&> (v);
	  return res;

However, the solution introduced in this patch contributes to letting
	the symbols handle themselves, by supplying them with constructors that
	take a non-variant value and build the symbol's own variant with that
	value.

* data/variant.hh (b4_symbol_constructor_define_): Use the new
	constructors rather than building in a temporary symbol.
	(b4_basic_symbol_constructor_declare,
	b4_basic_symbol_constructor_define): New macros generating the
	constructors.
	* data/c++.m4 (basic_symbol): Invoke the macros here.

2013-01-29  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: minor stylistic changes
	* data/c++m4: Remove useless comment lines.
	* data/variant.hh (self_type): Use this typedef instead of variant<S>.
	(b4_symbol_constructor_define_): Remove commented-out line, and stylistic
	change (avoid blank line).

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: please G++ 4.8 with -O3: type puning issue
	* tests/c++.at (Exception safety): Now that this test covers
	variants, pass -fno-strict-aliasing to g++.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: please G++ 4.8 with -O3: array bounds
	* data/c++.m4, data/lalr1.cc (by_state, by_type): Do not use -1 to
	denote the absence of value, as GCC then fears that this -1 might
	be used to dereference arrays (such as yytname).
	Use 0, which corresponds to $accept, which is valueless (the needed
	property: the symbol destructor must not try to reclaim the memory
	associated with the symbol).

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: use more explicit types than int
	* data/c++.m4 (b4_public_types_declare): Declare token_number_type soon.
	Introduce symbol_number_type (wider than token_number_type).
	Clarify the requirement that kind_type from by_state and by_type
	denote the _input_ type (required by the constructor), not the stored type.
	Use symbol_number_type and token_number_type where appropriate, instead
	of int.
	* data/lalr1.cc: Adjust to these changes.
	Propagate "symbol_number_type".
	Invoke "type_get ()" instead of read "type" directly.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: value_type -> kind_type
	* data/c++.m4, data/lalr1.cc (by_type, by_state): Rename 'value_type'
	as 'kind_type', as it is clearer.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: improve the signature of yysyntax_error_
	* data/lalr1.cc: This function is const.
	It takes a symbol_number_type.

2013-01-29  Akim Demaille  <akim@lrde.epita.fr>

c++: style changes
	* data/lalr1.cc: Formatting changes.
	And name changes.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

doxygen: upgrade Doxyfile, and complete it
	* doc/Doxyfile.in: Let doxygen upgrade it.
	(INCLUDE_PATH): Point to lib too.
	(PROJECT_BRIEF): New.
	(EXCLUDE): Update to reflect the current file hierarchy.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

maint: fix syntax-check issues
	* cfg.mk: Ignore strcmp in local.at.
	* tests/conflicts.at: Use AT_PARSER_CHECK.
	* tests/regression.at: Preserve the exit status of the generated parsers.

* tests/local.mk ($(TESTSUITE)): Map @tb@ to a tabulation.
	* tests/c++.at, tests/input.at, tests/regression.at: Use @tb@.
	* cfg.mk: (space-tab): There are no longer exceptions.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: please C90 compilers
	* tests/actions.at, tests/conflicts.at: Use /* ... */ comments.
	Let "main" return a value.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

maint: update todo
	* TODO: Remove fixed items.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

news: minor improvements
	* NEWS: Name some more contributors.
	Restructure slightly.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: please clang and use ".cc", not ".c", for C++ input
	When fed with foo.c, clang++ 3.2 answers:

clang: error: treating 'c' input as 'c++' when in C++ mode,
	                this behavior is deprecated

* tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Use *.cc and *.hh
	for C++.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: formatting changes
	* tests/local.at: Restore proper indentation.

2013-01-28  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: better inline expansion
	Many 'inline' keywords were in the declarations.  They rather belong in
	definitions, so move them.

* data/c++.m4 (basic_symbol, by_type): Many inlines here.
	* data/lalr1.cc (yytranslate_, yy_destroy_, by_state, yypush_, yypop_): Inline
	these as well.
	(move): Move the definition outside the struct, where it belongs.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: check that using variants is exception safe
	* tests/local.at: (Slightly) improve the regexp by escaping '.'
	when it denotes a point.
	(AT_VARIANT_IF): New.
	* tests/c++.at (Exception Safety): Run it for variants too.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: remove useless %defines
	Many tests were using %defines because C++ skeletons used to require
	it.

* tests/actions.at, tests/c++.at, tests/input.at, tests/regression.at:
	Remove useless %defines.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

c++: remove now-useless operators
	Now that symbols behaves properly, we can eliminate special routines
	that are no longer needed.

* data/c++.m4, data/glr.cc, data/lalr1.cc, data/variant.hh:
	Remove useless assignment operators and copy constructors.
	As a consequence, remove useless includes for "abort".

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

tests: enable support for --debug
	* tests/c++.at (Variants): Here.
	And remove useless clutter when api.token.constructor is enabled.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

c++: revamp the support for variants
	The current approach was too adhoc: the symbols were not sufficiently
	self-contained, in particular wrt memory management.  The "new"
	guideline is the one that should have been followed from the start:
	let the symbols handle themslves, instead of leaving their users to
	it.  It was justified by the will to avoid gratuitious moves and
	copies, but the current approach does not seem to be slower, yet it
	will probably be simpler to adjust to support move semantics from
	C++11.

The documentation says that the %parse-param are available from the
	%destructor.  In retrospect, that was a silly design decision, which
	we can break for variants, as its a new feature.  It should be phased
	out for non-variants too.

* data/variant.hh: A variant never knows if it stores something or
	not, it is up to its users to store this information.
	Yet, in parse.assert mode, make sure the empty/filled variants
	are properly used.
	(b4_symbol_constructor_define_): Don't call directly the symbol
	constructor, to save a useless temporary.
	* data/stack.hh (push): Steal the pushed value instead of duplicating
	it.
	This will simplify the callers of push, who handled this "move"
	approach themselves.
	* data/c++.m4 (basic_symbol): Let -1, as kind, denote the fact that
	a symbol is empty.
	This is needed for instance when shifting the lookahead: yyla
	is given as argument to "push", and its value is then moved on
	the stack.  But then yyla must be declared "empty" so that its
	destructor won't be called.
	(basic_symbol::move): New.
	Move the responsibility of calling the destructor from yy_destroy
	to ~basic_symbol in the case of variants.
	* data/lalr1.cc (stack_symbol_type): Now a derived class from its
	previous value, so that we can add a constructor from a symbol_type.
	(by_state): State -1 means empty.
	(yypush_): Factor, by calling one overload from the other one, and
	using the new semantics of stack::push.
	No longer reclaim by hand the memory from rhs symbols, since now
	that we store objects with proper destructors, they will be reclaimed
	automatically.
	Conversely, be sure to delete yylhs.
	* tests/c++.at (C++ Variant-based Symbols): New "unit" test for
	symbols.

2013-01-28  Akim Demaille  <akim@lrde.epita.fr>

c++: formatting and comment changes
	* data/c++.m4, data/lalr1.cc, data/stack.hh, data/variant.hh:
	Fix indentation.
	Fix some comments.

2013-01-27  Valentin Tolmer  <nitnelave1@gmail.com>

tests: add token declaration order test
	* tests/conflicts.at: New test.

2013-01-27  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-01-27  Valentin Tolmer  <nitnelave1@gmail.com>

grammar: preserve token declaration order
	In a declaration %token A B, the token A is declared before B, but in %left
	A B (or with %precedence or %nonassoc or %right), the token B was declared
	before A (tokens were declared in reverse order).

* src/symlist.h, src/symlist.c (symbol_list_append): New.
	* src/parse-gram.y: Use it instead of symbol_list_prepend.
	* tests/input.at: Adjust expectations.

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

tests: improve test group titles
	* tests/local.at (AT_SETUP_STRIP): AT_SETUP does not behave properly
	with new-lines in its argument.
	Remove them.
	Fix the handling of %define with quotes.

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

c: no longer require stdio.h when locations are enabled
	Recent changes (in 2.7) introduced a dependency on both FILE and
	fprintf, which are "available" only in %debug mode.  This was to
	define yy_location_print_, which is used only in %debug mode by the
	parser, but massively used by the test suite to output the locations
	in yyerror.

Break this dependency: the test suite should define its own routines
	to display the locations.  Eventually Bison will provide the user with
	a means to display locations, but not yet.

* data/c.m4 (b4_yy_location_print_define): Use YYFPRINTF instead of
	fprintf directly.
	* data/yacc.c (b4_yy_location_print_define): Invoke it only in %debug
	mode, so that stdio.h is included (needed for FILE*), and YYFPRINTF
	is defined.

* tests/local.at (AT_YYERROR_DECLARE, AT_YYERROR_DEFINE): Declare
	and define location_print and LOCATION_PRINT.

* tests/actions.at, tests/existing.at, tests/glr-regression.at,
	* tests/input.at, tests/named-refs.at, tests/regression.at: Adjust
	to use them.
	Fix the expected line numbers (as the prologue's length has changed).

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

c: minor simplification in the debug code
	* data/c.m4 (yy_symbol_print): Minor factoring.

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

c++: display locations as C does
	See commit 3804aa260b956dd012adde3894767254422a5fcf.

* data/location.cc (operator<<): Display location exactly as is
	done in C skeletons.
	* tests/local.at (AT_LOC_PUSHDEF, AT_LOC_POPDEF): Also define
	AT_FIRST_LINE, AT_LAST_LINE, AT_FIRST_COLUMN, AT_LAST_COLUMN.
	* tests/actions.at (Location Print): Also check C++ skeletons.

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

tests: highlight empty right-hand sides
	* tests/actions.at, tests/c++.at, tests/headers.at,
	* tests/input.at: here.

2013-01-25  Akim Demaille  <akim@lrde.epita.fr>

news: prepare for 2.8
	* NEWS: Restructure.
	Name contributors.

2013-01-21  Akim Demaille  <akim@lrde.epita.fr>

tests: generalize default main for api.namespace
	* tests/local.at (AT_NAME_PREFIX): Also match api.namespace.
	(AT_MAIN_DEFINE): Take it into account.
	* tests/c++.at, tests/headers.at: Use AT_NAME_PREFIX.
	(AT_CHECK_NAMESPACE): Rename as...
	(AT_TEST): this.

2013-01-21  Akim Demaille  <akim@lrde.epita.fr>

tests: improve factoring of the main function
	* tests/local.at (AT_MAIN_DEFINE): If %debug is used, check if
	-d/--debug is passed to the generated parser, and enable the traces.
	Return exactly the result of yyparse, so that we can check exit code
	2 too.
	* tests/actions.at, tests/glr-regression.at, tests/regression.at:
	Use AT_MAIN_DEFINE, helping AT_BISON_OPTION_PUSHDEFS where needed,
	preferably to option -t.

2013-01-21  Akim Demaille  <akim@lrde.epita.fr>

tests: factor the definition of main
	With Théophile Ranquet.

* tests/local.at (AT_MAIN_DEFINE): New.
	(AT_YYERROR_DEFINE): Improve formatting.
	* tests/actions.at, tests/c++.at, tests/conflicts.at,
	* tests/glr-regression.at, tests/input.at, tests/regression.at,
	* tests/skeletons.at, tests/torture.at: Adjust.
	* tests/c++.at: Add missing %skeleton for a PUSHDEFS, and a missing
	PUSH/POPDEFS for another test.

2013-01-21  Akim Demaille  <akim@lrde.epita.fr>

tests: minor refactoring
	* tests/named-refs.at: Use AT_FULL_COMPILE where applicable.

2013-01-21  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: avoid useless caret stuttering
	* src/scan-code.l: When reporting a missing ending ';', don't display
	the guilty action twice.

2013-01-21  Theophile Ranquet  <ranquet@lrde.epita.fr>

examples: please clang
	* doc/bison.texi (calc++-scanner.ll): Don't output useless yyinput function.

2013-01-21  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: better silencing of unused argument warnings
	input.yy:35:44: error: unused parameter 'msg' [-Werror,-Wunused-parameter]
	void yy::parser::error (std::string const& msg)
	                                           ^

* tests/c++.at (C++ GLR parser identifier shadowing): Don't name unused
	argument, use YYUSE instead of a direct cast to void.

2013-01-21  Theophile Ranquet  <ranquet@lrde.epita.fr>

bench: compatibility for Bison <= 2.7
	There used to be a bug in some skeletons, which caused the expansion of
	'yylval' and 'yylloc', generating these errors:

input.cc:547:16: error: expected ',' or '...' before '(' token
	 #define yylval (yystackp->yyval)
	                ^
	input.yy:29:39: note: in expansion of macro 'yylval'
	 int yylex (yy::parser::semantic_type *yylval)
	                                       ^

This bug is fixed by 'skel: better aliasing of identifiers', but a workaround
	is useful when benchmarking against older versions of Bison, which are still
	affected by the bug.

* etc/bench.pl.in: Rename yylval to yylvalp and yylloc to yyllocp in base
	grammar 'list'.

2013-01-15  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: remove useless inlines
	* data/c++.m4 (basic_symbol): Keep 'inline' in the prototypes, but don't
	duplicate it in the implementation.
	* data/variant.hh (variant): 'inline' is not needed when the implementation is
	provided in the class definition.

2013-01-15  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: m4 stylistic change
	* data/c++.m4 (syntax_error): Fix the indentation of 'inline'.

2013-01-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: silence warnings
	* data/c++.m4 (basic_symbol<Base>::operator=): Unused parameter.
	* tests/c++.at (C++ GLR parser identifier shadowing): Here too.
	-

2013-01-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

news: typos
	* NEWS: Fix a typo, use YYSTYPE rather than semantic_type.

2013-01-12  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-01-12  Akim Demaille  <akim@lrde.epita.fr>

maint: update copyright years
	Suggested by Stefano Lattarini.
	Run "make update-copyright".

2013-01-12  Akim Demaille  <akim@lrde.epita.fr>

build: fix VPATH issue
	* Makefile.am (update-b4-copyright, update-package-copyright-year): Fix
	path to build-aux.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

carets: document default activation
	* NEWS: Announce it.
	* doc/bison.texi: Adjust.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

carets: show them in more tests
	* tests/input.at, tests/named-refs.at: Here.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

carets: activate by default
	* src/getargs.c (feature_flag): Here.
	* tests/local.at (AT_BISON_CHECK_, AT_BISON_CHECK_NO_XML): Deactivate carets
	for the testsuite, by default.
	* tests/input.at: Adjust the locations for command line definitions.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

variants: document move and swap
	* data/variant.hh (swap): Doc.
	(build): Rename as...
	(move): This, more coherent naming with clearer meaning.
	* data/c++.m4 (move): Adjust.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

c++: privatize variant blind copies
	* data/variant.hh (variant, operator=): Make private.
	* data/c++.m4 (operator=): New, to avoid needing a definition of that operator
	for each class member (such as a possible variant).
	* data/glr.cc, data/lalr.cc: Add the necessary include for the abort.

2013-01-11  Akim Demaille  <akim@lrde.epita.fr>

glr.c: fix an unused argument issue
	* data/glr.c (yyuserAction): "Use" yyrhslen, as in variant mode, we might
	not use it.

2013-01-11  Akim Demaille  <akim@lrde.epita.fr>

glr.c: style changes
	* data/glr.c (yyuserAction): Use a size_t for sizes.

2013-01-11  Akim Demaille  <akim@lrde.epita.fr>

c.m4: style fix
	* data/c.m4 (b4_parse_param_use): Add missing space before paren.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

skel: better aliasing of identifiers
	* data/glr.c, data/yacc.c: Avoid emitting useless defines.
	* data/glr.cc: Restore prefixes for epilogue.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

glr.cc: fatal if using api.token.ctor without variants
	* data/glr.cc: Here.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

skel: correctly indent switch cases
	* data/bison.m4 (b4_type_action_): Here.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

variants: assert changes
	* data/variant.hh (swap): More asserts can't hurt. Don't perform useless swaps.
	(build): Deactivate problematic asserts, pending further investigation.
	(variant): Prohibit copy construction.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

lalr1.cc: use a vector for the symbol stack
	* data/lalr1.cc: Adjust includes.
	* data/stack.hh (push, pop): Use push_back and pop_back.
	(operator []): Access vector from the end.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

lalr1.cc: change symbols implementation
	A "symbol" groups together the symbol type (INT, PLUS, etc.), its
	possible semantic value, and its optional location.  The type is
	needed to access the value, as it is stored as a variant/union.

There are two kinds of symbols. "symbol_type" are "external symbols":
	they have type, value and location, and are returned by yylex.
	"stack_symbol_type" are "internal symbols", they group state number,
	value and location, and are stored in the parser stack.  The type of
	the symbol is computed from the state number.

The class template symbol_base_type<Exact> factors the code common to
	stack_symbol_type and symbol_type.  It uses the Curiously Recurring
	Template pattern so that we can always (static_) downcast to the exact
	type.  symbol_base_type features value and location, and delegates the
	handling of the type to its parameter.

When trying to generalize the support for variant, a significant issue
	was revealed: because stack_symbol_type and symbol_type _derive_ from
	symbol_base_type, the type/state member is defined _after_ the value
	and location.  In C++ the order of the definition of the members
	defines the order in which they are initialized, things go backward:
	the value is initialized _before_ the type.  This is wrong, since the
	type is needed to access the value.

Therefore, we need another means to factor the common code, one that
	ensures the order of the members.

The idea is simple: define two (base) classes that code the symbol
	type ("by_type" codes it by its type, and "by_state" by the state
	number).  Define basic_symbol<Base> as the class template that
	provides value and location support.  Make it _derive_ from its
	parameter, by_type or by_state.  Then define stack_symbol_type and
	symbol_type as basic_symbol<by_state>, basic_symbol<by_type>.  The
	name basic_symbol was chosen by similarity with basic_string and
	basic_ostream.

* data/c++.m4 (symbol_base_type<Exact>): Remove, replace by...
	(basic_symbol<Base>): which derives from its parameter, one of...
	(by_state, by_type): which provide means to retrieve the actual type of
	symbol.
	(symbol_type): Is now basic_symbol<by_type>.
	(stack_symbol_type): Is now basic_symbol<by_state>.
	* data/lalr1.cc: Many adjustments.

2013-01-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

bench: add %b directive to use a specific Bison
	For example,
	  $ bench.pl -v '%s lalr1.cc & %d variant & ( %b ~/old-bison/bin/bison
	    | %b ~/new-bison/bin/bison )' -g list -i 10000

* etc/bench.pl.in: Here.

2013-01-09  Akim Demaille  <akim@lrde.epita.fr>

regen

2013-01-04  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

doc: use deffn to declare the list of %define variables
	* doc/bison.texi (%define Summary): Use @deffn instead of @table, it
	spares a lot of width, especially in PDF, and looks nicer in the other
	formats too.
	It is also more consistent with the rest of the document.

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

doc: minor completion and fixes
	* doc/bison.texi (%define Summary): Provide more history to some
	variables.

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

java: stype is obsoleted by api.value.type
	This is consistent with the other %define variable names.

* data/java.m4: Use api.value.type instead of stype.
	* doc/bison.texi, NEWS: Document that change.
	* src/muscle-tab.c (muscle_percent_variable_update): Provide backward
	compatibility.
	* tests/java.at: Adjust.

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

doc: fix html build
	* doc/local.mk (bison.html): Fix dependencies.

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

todo: remove erroneous task
	* tests/input.at: Check that there are no warnings about stray $ and @
	in the epilogue.
	* TODO: Remove the correponding task.

2012-12-31  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

syncline: one line is enough
	So far we were issuing two lines for each syncline change:

/* Line 356 of yacc.c  */
	  #line 1 "src/parse-gram.y"

This is a lot of clutter, especially when reading diffs, as these
	lines change often.  Fuse them into a single, shorter, line:

#line 1 "src/parse-gram.y" /* yacc.c:356  */

* data/bison.m4 (b4_syncline): Issue a single line.
	Comment improvements.
	(b4_sync_start, b4_sync_end): Issue a shorter comment.
	* data/c++.m4 (b4_semantic_type_declare): b4_user_code must be
	on its own line as it might start with a "#line" directive.

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

maint: restore ANSI 89 compliance
	* data/bison.m4, src/conflicts.c, src/files.c, src/output.c,
	* src/symtab.c: Use /* ... */ comments only.
	Declare variables before statements.

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

graph: minor simplification
	* src/gram.c (print_lhs): Use %*s to indent.
	* src/print_graph.c (print_lhs): Use obstack_printf.
	Became simple enough to be inlined in...
	(print_core): here.
	Use a "rule*" instead of an index in "rules[]".

2012-12-28  Akim Demaille  <akim@lrde.epita.fr>

closure, gram: add missing const
	* src/closure.h, src/closure.c, src/gram.h, src/gram.c: Add some missing
	const where appropriate.

2012-12-27  Theophile Ranquet  <ranquet@lrde.epita.fr>

carets: properly display when no line feed is present
	* src/location.c (location_caret): finish the line with one whether or not it
	is present in input. Rewrite code without getline.
	(cleanup_caret): Reset the caret_info global.
	* bootstrap.conf: No longer require getline.

2012-12-27  Theophile Ranquet  <ranquet@lrde.epita.fr>

scanner: reintroduce unput for missing end tokens
	Unput was no longer used since a POSIX-compatiblity issue with Flex 2.5.31,
	which has been adressed in newer versions of Flex.  See this discussion:
	<http://lists.gnu.org/archive/html/bug-bison/2003-04/msg00029.html>

This partially reverts commit aa4180418fff518198e1b0f2c43fec6432210dc7.

* src/scan-gram.l (unexpected_end): Here.
	* tests/input.at: Adjust for new order of error reports.

2012-12-27  Akim Demaille  <akim@lrde.epita.fr>

tables: scope reduction
	* src/tables.c (default_goto): Make it easier to understand.

2012-12-27  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-12-27  Akim Demaille  <akim@lrde.epita.fr>

skeletons: fix comments
	The commit 38de4e570fdc7c8db9633c3b2054e565d8c1c6b9 underquoted the
	content of the comments, which resulted in losing square brackets in
	the comments.  Besides, some other invocations were underquoting the
	effective arguments.

* data/c.m4 (b4_comment_): Properly quote the comment.
	(b4_comment_, b4_comment): Move to...
	* data/c-like.m4: here, so that...
	* data/java.m4: can use it instead of its own copy.
	* data/bison.m4 (b4_integral_parser_tables_map): Fix some comments.

* data/lalr1.cc, data/lalr1.java, data/yacc.c: Comment fixes.

* data/lalr1.cc: Reorder a bit to factor some CPP directives.

2012-12-27  Akim Demaille  <akim@lrde.epita.fr>

maint: which -> whose
	Apparently, I was confusing both.

* data/bison.m4, data/c.m4, data/glr.c, data/lalr1.cc, data/yacc.c:
	Use "whose" where appropriate.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: scope reduction
	* src/tables.c (matching_state): here.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: scope reduction
	* src/tables.c (token_actions): here.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: scope reduction
	* src/tables.c (save_row): here.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: scope reduction
	* src/tables.c (save_column, pack_vector): Reduce the scope to
	emphasize the structure of the code.
	Rename the returned value "res" to make understanding easier.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: use size_t where appropriate
	These changes aim at making the code easier to understand.

* src/tables.c (tally): This is a size, always >= 0, so make it
	a size_t.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tables: style changes
	* src/tables.c: Prefer < to >.
	Fix/complete some comments.
	Remove useless parens.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

skeletons: no longer call yylex via a CPP macro
	The YYLEX existed only to support YYLEX_PARAM, which is now removed.
	This macro was a nuisance, since incorrect yylex calls where pointed
	the macro _use_, instead of its definition.

* data/c.m4 (b4_lex_formals, b4_lex): New.
	* data/glr.c, data/yacc.c: Use it.
	* data/lalr1.cc (b4_lex): New.
	Use it.

squash! skeletons: no longer call yylex via a CPP macro

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

YYLEX_PARAM: drop support
	* data/yacc.c, doc/bison.texi: Remove YYLEX_PARAM support.
	* NEWS: Document it.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

examples: minor improvements
	* examples/variant.yy: Don't use debug_stream(), obsoleted.
	Use <*>.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

skeletons: factor comments about symbols
	* data/variant.hh (b4_char_sizeof_): Rename as...
	* data/bison.m4 (b4_symbol_tag_comment): this.
	Provide more documentation about b4_symbol_*.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

c: improve the definition of public types
	* data/c.m4 (b4_token_enum): Improve comments.
	(b4_value_type_define, b4_location_type_define): New, extracted
	from...
	(b4_declare_yylstype): here.
	Separate the typedefs from the union/struct definitions.

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

doc: update variant usage
	* doc/bison.texi, examples/variant.yy: Use "%define api.value.type variant",
	instead of "%define variant".

2012-12-26  Akim Demaille  <akim@lrde.epita.fr>

tests: check the "%define variant" is deprecated.
	* tests/input.at: Rename some AT_SETUP to avoid that
	AT_SETUP_STRIP thinks they contain %define directives.
	("%define" backward compatibility): Merge tests together
	to speed up the test suite, and to make maintenance easier
	(multiple AT_CHECK means multiple runs of the test suite to
	be sure to have updated all the error messages).
	Check the "%define variant" is properly obsoleted.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

%define variables: support value changes in deprecation
	* src/muscle-tab.c (define_directive): Be robust to "assignment"
	containing '='.
	(muscle_percent_variable_update): Upgrade "variant" to "api.value.type".
	Support such upgrade patterns.
	Adjust callers.

* data/bison.m4: Use api.value.type for variants.
	* tests/c++.at: Adjust tests.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: treat obsolete %define variable names as obsolete directives
	Instead of

warning: deprecated %define variable name: 'namespace', use 'api.namespace' [-Wdeprecated]

display (in -fno-caret mode):

warning: deprecated directive: '%define namespace foo', use '%define api.namespace foo' [-Wdeprecated]

and (in -fcaret mode):

warning: deprecated directive, use '%define api.namespace toto' [-Wdeprecated]
	   %define namespace toto
	           ^^^^^^^^^

This is in preparation of cases where not only the variable is
	renamed, but the values are too:

warning: deprecated directive: '%define variant', use '%define api.value.type variant' [-Wdeprecated]

* src/muscle-tab.c (define_directive): New.
	(muscle_percent_variable_update): Take the value as argument, and use it
	in the diagnostics.
	Loop with a pointer instead of an index.
	* tests/input.at (%define backward compatibility): Adjust.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: factor the deprecated directive message
	* src/complain.h, src/complain.c (deprecated_directive): New.
	* src/muscle-tab.c: Use it.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

variant: produce stable results
	Improve the output by ensuring a well defined order for type switches.

* src/uniqstr.h: Style changes for macro arguments.
	(UNIQSTR_CMP): Replace by...
	(uniqstr_cmp): this.
	* src/uniqstr.c (uniqstr_cmp): New.
	Produce well defined results.
	* src/output.c: Use it.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

uniqstr: formatting changes
	* src/uniqstr.h: Sort functions by object type.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

skeletons: fix an error message
	* data/bison.m4 (b4_flag_if): Display the invalid value.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

tests: improve titles
	* tests/local.at (AT_SETUP_STRIP): New.
	(AT_SETUP): Use it to shorten the test titles: remove %defines, %language
	and %skeleton whose arguments suffice.
	* tests/synclines.at: Use more precise AT_SETUP.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

c++: comment changes
	* data/c++.m4, data/glr.cc, data/lalr1.cc: Convert some /* ... */
	comments to //.

2012-12-23  Akim Demaille  <akim@lrde.epita.fr>

c++: use // comments in the output
	This is mostly used for the license header, the synclines, and the
	generated tables:

-  /* STOS_[STATE-NUM] -- The (internal number of the) accessing
	-     symbol of state STATE-NUM.    */
	+  // STOS_[STATE-NUM] -- The (internal number of the) accessing
	+  // symbol of state STATE-NUM.
	   static const unsigned char yystos_[];

* data/c.m4: Comment changes.
	(b4_comment_): Expand the text argument.
	Before this change, we were actually formatting M4 code as a
	C comment, and then expand it.
	(b4_comment): Fix the closing of comments: there is no reason to
	add the (line) prefix before the closing "*/".
	* data/c++.m4 (b4_comment): New.

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

maint: disable sc_prohibit_test_backticks
	* cfg.mk: here.
	And fix typos.
	Reported by Stefano Lattarini.

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

maint: more syntax-checks
	* cfg.mk (sc_prohibit_tab_based_indentation, sc_prohibit_test_backticks)
	(sc_preprocessor_indentation, sc_space_before_open_paren): New,
	stolen from Coreutils (2e9f5ca4ebbbdb6a9fa2dd3d5add3f7720a172d7).

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

debug: no longer generate tabs
	* src/closure.c, src/derives.c, src/nullable.c, tests/sets.at: Use
	spaces.

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

style changes: run cppi
	Run it in src/ for a start.

* src/AnnotationList.h, src/InadequacyList.h, src/Sbitset.h,
	* src/closure.c, src/complain.h, src/flex-scanner.h, src/getargs.h,
	* src/gram.h, src/graphviz.h, src/ielr.h, src/location.h,
	* src/muscle-tab.h, src/named-ref.h, src/relation.h, src/scan-code.h,
	* src/state.h, src/symtab.h, src/system.h, src/uniqstr.h:
	Reindent preprocessor directives.

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

style changes: untabify
	* data/xslt/xml2dot.xsl, data/xslt/xml2text.xsl, m4/flex.m4,
	* tests/glr-regression.at, tests/torture.at: here.

2012-12-21  Akim Demaille  <akim@lrde.epita.fr>

tests: be robust to set -e.
	* examples/test (run): here.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

variants: prohibit simple copies
	The "variant" structure provides a means to store, in a typeless way,
	C++ objects.  Manipulating it without provide the type of the stored
	content is doomed to failure.  So provide a means to copy in a type
	safe way, and prohibit typeless assignments.

* data/c++.m4 (symbol_type::move): New.
	* data/lalr1.cc: Use it.
	* data/variant.hh (b4_variant_define): Provide variant::copy.
	Let variant::operator= abort.
	We cannot undefine it, yet, as it is still uses by the implicit
	assigment in symbols, which must also be disabled.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

variant: more assertions
	Equip variants with more checking code.  Provide a means to request
	includes.

* data/variant.hh (b4_variant_includes): New.
	* data/lalr1.cc: Use it.
	* data/variant.hh (variant::built): Define at the end, as a private member.
	(variant::tname): New.
	Somewhat makes "built" useless, but let's keep both for a start, in
	case using "typeinfo" is considered unacceptable in some environments.
	Fix some formatting issues.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

skeletons: fix output directives
	* data/lalr1.cc, data/location.cc, data/glr.cc: Use b4_output_begin.
	Broken during a merge.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: style changes
	* data/yacc.c (b4_lex_param): Provide arguments with a name.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: simplifying the handling of parse/lex params
	The fact that glr.cc uses glr.c makes the handling of parse params
	more complex, as the parser object of glr.cc must be passed to the
	parse function of glr.c.  Yet not all the functions need access to
	the parser object.

* data/glr.cc (b4_parse_param_wrap): New.
	Use them.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

glr: rename lex params
	* data/glr.c (b4_lex_param): Rename as...
	(b4_lex_formals): this, for consistency.
	Provide arguments a name.
	(LEX): Adjust.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

glr.c: move function declaration earlier
	* data/glr.c (yypstack, yypdumpstack): Declare earlier, to make
	it easier to call them from other functions.

2012-12-19  Akim Demaille  <akim@lrde.epita.fr>

%define variables: backward compatibility
	* src/muscle-tab.c (muscle_percent_variable_update): Accept lex_symbol.
	Reported by Roland Levillain.

2012-12-16  Akim Demaille  <akim@lrde.epita.fr>

diagnostics: improve -fcaret for list of accepted values
	Instead of

input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
	   %define api.push_pull "neither"
	           ^^^^^^^^^^^^^
	  input.y:1.9-21:     accepted value: 'pull'
	   %define api.push_pull "neither"
	           ^^^^^^^^^^^^^
	  input.y:1.9-21:     accepted value: 'push'
	   %define api.push_pull "neither"
	           ^^^^^^^^^^^^^
	  input.y:1.9-21:     accepted value: 'both'
	   %define api.push_pull "neither"
	           ^^^^^^^^^^^^^

report

* src/complain.h (no_caret): New.
	* src/complain.c (error_message): Use it.
	* src/muscle-tab.c (muscle_percent_define_check_values): Use it.
	* src/scan-skel.l (flag): Ditto.
	* tests/input.at: Adjust and check.

2012-12-16  Akim Demaille  <akim@lrde.epita.fr>

skeletons: simplify the handling of default api.location.type
	* data/bison.m4 (b4_bison_locations_if): New.
	* data/glr.cc, data/lalr1.cc: Use it.

2012-12-16  Akim Demaille  <akim@lrde.epita.fr>

tests: address syntax-check failures
	* cfg.mk: Ignore failures in timevar (uses GCC style configuration,
	not gnulib's).
	* doc/local.mk: Space changes.
	* lib/main.c, tests/calc.at: Remove useless HAVE_ tests.

2012-12-15  Akim Demaille  <akim@lrde.epita.fr>

remove duplicate definitions
	* src/system.h: here, inherited from a merge.

2012-12-15  Akim Demaille  <akim@lrde.epita.fr>

tests: style changes
	* tests/glr-regression.at: Issue yyerror before yylex.

2012-12-15  Akim Demaille  <akim@lrde.epita.fr>

doc: fix dependencies
	* doc/local.mk: here.

2012-12-14  Akim Demaille  <akim@lrde.epita.fr>

doc: style fixes
	* doc/bison.texi: Add a couple of missing @var and @code.

2012-12-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

doc: fix build dependencies
	Suggested by Nick Bowler
	<http://lists.gnu.org/archive/html/bug-automake/2012-12/msg00001.html>

* doc/local.mk: Avoid overwriting Automake's rules.

2012-12-14  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'origin/maint'
	* origin/maint:
	  maint: credit Wojciech Polak
	  maint: post-release administrivia
	  version 2.7
	  yacc.c: scope reduction
	  tests: C90 compliance
	  fix C90 compliance
	  glr.c: scope reduction
	  gnulib: update

2012-12-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

symtab: add missing initializations
	* src/symtab.c (semantic_type_new): Here.

2012-12-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

symtab: fix some leaks
	* src/symlist.c (symbol_list_free): Deep free it.
	* src/symtab.c (symbols_free, semantic_types_sorted): Free it too.
	(symbols_do, sorted): Call by address.

2012-12-14  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: remove use of PARSE_PARAM
	* tests/header.at: Here.

2012-12-13  Akim Demaille  <akim@lrde.epita.fr>

maint: credit Wojciech Polak
	* NEWS, THANKS: He is the author of XML support (including XSLTs).

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

version 2.7
	* NEWS: Record release date.

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: scope reduction
	* data/yacc.c (yysyntax_error): here.

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

tests: C90 compliance
	* tests/synclines.at: here.

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

fix C90 compliance
	* data/glr.c, src/graphviz.h, src/ielr.c, src/scan-gram.l,
	* src/system.h, tests/actions.at, tests/glr-regression.at: Do not
	use // comments.
	Do not introduce variables after statements.
	Provide "main" with a return value.

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

glr.c: scope reduction
	* data/glr.c (yyreportSyntaxError): Reduce the scope of yysize1 (now
	yysz).

2012-12-12  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-12-10  Theophile Ranquet  <ranquet@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  news: prepare for forthcoming release
	  doc: explain how mid-rule actions are translated
	  error: use better locations for unused midrule values
	  doc: various minor improvements and fixes
	  tests: ignore more useless compiler warnings
	  tests: be robust to C being compiled with a C++11 compiler
	  build: beware of Clang++ not supporting POSIXLY_CORRECT
	  maint: post-release administrivia
	  version 2.6.90
	  build: fix syntax-check error.
	  cpp: simplify the Flex version checking macro
	  news: improve the carets example and fix a typo
	  cpp: improve the Flex version checking macro
	  carets: improve the code
	  maint: update news
	  build: keep -Wmissing-declarations and -Wmissing-prototypes for modern GCCs
	  build: drop -Wcast-qual
	  gnulib: update

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

news: prepare for forthcoming release
	* NEWS: Fill paragraph.
	Reorder.
	Update examples.
	Remove line for 2.6.90.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

doc: explain how mid-rule actions are translated
	* doc/bison.texi (Actions in Mid-Rule): Mention and use named references.
	Split into three subsections, among which...
	(Mid-Rule Action Translation): this new section.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

error: use better locations for unused midrule values
	On

%%
	  exp: {;} {$$;} { $$ = $1; }

instead of reporting (with -fcaret -Wmidrule-value)

midrule.y:2.6-8: warning: unset value: $$ [-Wmidrule-values]
	   exp: {;} {$$;} { $$ = $1; }
	        ^^^
	  midrule.y:2.6-27: warning: unused value: $2 [-Wmidrule-values]
	   exp: {;} {$$;} { $$ = $1; }
	        ^^^^^^^^^^^^^^^^^^^^^^

report

midrule.y:2.6-8: warning: unset value: $$
	   exp: {;} {$$;} { $$ = $1; }
	        ^^^
	  midrule.y:2.10-14: warning: unused value: $2
	   exp: {;} {$$;} { $$ = $1; }
	            ^^^^^

* src/reader.c (grammar_rule_check): When warning about the value of a
	midrule action, use the location of the midrule action instead of the
	location of the rule.
	the location of the part of the rule.
	* tests/actions.at (Default %printer and %destructor for mid-rule values):
	Adjust expectations
	* tests/input.at (Unused values with default %destructor): Ditto.
	(AT_CHECK_UNUSED_VALUES): Ditto.
	And use -fcaret.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

doc: various minor improvements and fixes
	* doc/figs/example.dot, doc/figs/example.y: New.
	* doc/bison.texi: Prefer "token" to TOKEN.
	Use @group where appropriate.
	Adjust with style changes in the output (State 0, not state 0).
	Fix some @ref that were missing the third argument.
	Fix some incorrect line numbers.
	Use "nonterminal", not "non-terminal".
	Fix overfull and underfull TeX hboxes.
	Put the comments in the index.
	Remove duplicate index entries.
	Fuse glossary entries where appropriate.
	(Understanding): Improve the continuity between sections.
	Use example.dot to show the whole graph.
	* doc/Makefile.am: Adjust.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

tests: ignore more useless compiler warnings
	* tests/synclines.at (AT_SYNCLINES_COMPILE): Ignore complains about
	using c++ to compile C.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

tests: be robust to C being compiled with a C++11 compiler
	* tests/glr-regression.at: Use YY_NULL instead of NULL.
	Comment changes.

2012-12-09  Akim Demaille  <akim@lrde.epita.fr>

build: beware of Clang++ not supporting POSIXLY_CORRECT
	* m4/c-working.m4 (BISON_LANG_COMPILER_POSIXLY_CORRECT): New.
	(BISON_C_COMPILER_POSIXLY_CORRECT): Use it.
	For consistency with C++, also define BISON_C_WORKS.
	* m4/cxx.m4 (BISON_CXX_COMPILER_POSIXLY_CORRECT): New.
	* configure.ac: Use it.
	* tests/atlocal.in: Get its result.
	Propagate properly CXX values when used to compile C.
	When POSIXLY_CORRECT, adjust BISON_C_WORKS and BISON_CXX_WORKS.
	* tests/local.at (AT_COMPILE): Use BISON_C_WORKS.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.90
	* NEWS: Record release date.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

build: fix syntax-check error.
	* cfg.mk: Exclude names-refs, it includes a "double" if (end of first
	line, first of second line below).

test.y:43.12-44.59:  symbol not found in production: if
	 if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
	            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

2012-12-07  Theophile Ranquet  <ranquet@lrde.epita.fr>

cpp: simplify the Flex version checking macro
	* src/flex-scanner,h (FLEX_VERSION): Consider YY_FLEX_SUBMINOR_VERSION
	defined.

2012-12-07  Theophile Ranquet  <ranquet@lrde.epita.fr>

news: improve the carets example and fix a typo
	* NEWS: Here.

2012-12-07  Theophile Ranquet  <ranquet@lrde.epita.fr>

cpp: improve the Flex version checking macro
	* src/flex-scanner.h (FLEX_VERSION): Here.

2012-12-07  Theophile Ranquet  <ranquet@lrde.epita.fr>

carets: improve the code
	* src/location.c: Remove duplicate documentations.
	(caret_info): Stylistic change.
	(location_caret): Many reworks.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

maint: update news
	* NEWS: There is no 2.6.6, remove its stub.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

build: keep -Wmissing-declarations and -Wmissing-prototypes for modern GCCs
	Fixes a -Werror failure of xalloc.h used in src.
	From Eric Blake.
	http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00006.html

* configure.ac: Check whether GCC pragma diagnostic push/pop works.
	Enable these warnings for bison if it does.
	Enable these warnings for the test suite anyway.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

build: drop -Wcast-qual
	Suggested by Jim Meyering.
	http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00017.html
	* configure.ac (warn_common): Remove -Wcast-qual.

2012-12-07  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-12-06  Theophile Ranquet  <ranquet@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  misc: pacify the Tiny C Compiler
	  cpp: make the check of Flex version portable
	  misc: require getline
	  c++: support wide strings for file names
	  doc: document carets
	  tests: enhance existing tests with carets
	  errors: show carets
	  getargs: add support for --flags/-f

2012-12-06  Theophile Ranquet  <ranquet@lrde.epita.fr>

misc: pacify the Tiny C Compiler
	* src/graphviz.c (conclude_red): Remove a useless return.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

cpp: make the check of Flex version portable
	This was problematic with tcc 0.9.25

* src/flex-scanner.h (FLEX_VERSION_GT): Rewrite and rename as...
	(FLEX_VERSION): This.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

misc: require getline
	* bootstrap.conf: Here, used by src/location.c.
	* src/getargs.c (long_options): Rename --flags to --feature.

2012-12-05  Akim Demaille  <akim@lrde.epita.fr>

c++: support wide strings for file names
	Reported by Mark Boyall.
	http://lists.gnu.org/archive/html/help-bison/2011-08/msg00002.html

* data/location.cc (operator<<): Be templated on the type of
	output stream.
	* tests/headers.at (Several parsers): Adjust.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

doc: document carets
	* NEWS: Announce it.
	* doc/bison.texi (Bison Options):  Here.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: enhance existing tests with carets
	* tests/actions.at: Unset value.
	* tests/conflicts.at: Rule useless due to conflicts.
	* tests/input.at: Missing terminator, unexpected end of file, command line
	redefinition of variable.
	* tests/named-refs.at: Many errors.
	* tests/reduce.at: Useless nonterminals and rules.
	* tests/regression.at: Large token.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: show carets
	* src/locations.c (caret_info): New, persistant information useful
	for...
	(location_caret): New, print a caret.
	(cleanup_caret): Release caret_info cleanly, call it...
	* src/main.c (main): Here.
	* src/complain.c (error_message): Call location_caret here.

2012-12-05  Theophile Ranquet  <ranquet@lrde.epita.fr>

getargs: add support for --feature/-f
	Introduce -fdiagnostics-show-caret

* src/getargs.c (feature_flag): New global.
	* src/getargs.h (feature): New enum.

2012-12-05  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  getargs: don't label --language/-l as experimental
	  getargs: fix the locations of command-line input
	  errors: indent missing action code semicolon warning

2012-12-04  Theophile Ranquet  <ranquet@lrde.epita.fr>

getargs: don't label --language/-l as experimental
	* NEWS: Announce it.
	* doc/bison.texi, src/getargs.c (usage): Here.

2012-12-03  Akim Demaille  <akim@lrde.epita.fr>

tests: minor improvements
	* tests/calc.at (AT_CHECK_SPACES): To speed up, accept several files
	at once, and factor some calls.

2012-12-03  Theophile Ranquet  <ranquet@lrde.epita.fr>

getargs: fix the locations of command-line input
	* src/getargs.c (command_line_location): Here.
	* tests/input.at: Adjust.

2012-12-03  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: indent missing action code semicolon warning
	Also, remove a duplicate #define.

* src/scan-code.l (SC_RULE_ACTION): Here.
	* tests/actions.at: Adjust.

2012-12-03  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  parser: accept #line NUM
	  m4: use a safer pattern to enable/disable output
	  tests: beware of gnulib's need for config.h
	  gnulib: update
	  yacc.c, glr.c: check and fix the display of locations
	  formatting changes
	  glr.c: remove stray macro

2012-12-03  Akim Demaille  <akim@lrde.epita.fr>

parser: accept #line NUM
	* src/scan-gram.l (scanner): Accept '#line NUM'.
	(handle_syncline): Adjust to the possible missing file name.

2012-12-03  Akim Demaille  <akim@lrde.epita.fr>

m4: use a safer pattern to enable/disable output
	Work on some other areas of Bison revealed that some macros expanded
	to be expanded only once were actually expanded several times.  This
	was due to the fact that changecom was not properly restored each
	time, and macro names appearing in comments were then expanded.

Introduce begin/end macros which are easier to match that
	changecom()/changecom(#).

* data/bison.m4 (b4_output_begin, b4_output_end): New.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/lalr1.java,
	* data/location.cc, data/stack.hh, data/yacc.c:
	Use them.

2012-12-03  Akim Demaille  <akim@lrde.epita.fr>

tests: beware of gnulib's need for config.h
	* tests/skeletons.at, tests/torture.at: Be sure to include config.h
	where appropriate.

2012-11-30  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update
	* lib/yyerror.c: Include config.h since the following stdio.h might be
	from gnulib.

2012-11-30  Akim Demaille  <akim@lrde.epita.fr>

yacc.c, glr.c: check and fix the display of locations
	In some case, negative column number could be displayed.
	Make YY_LOCATION_PRINT similar to bison's own implementation of
	locations.  Since the macro is getting fat, make it a static
	function.
	Reported by Jonathan Fabrizio.

* data/c.m4 (yy_location_print_define): Improve the implementation,
	and generate the yy_location_print_ function.
	Adjust YY_LOCATION_PRINT.
	* tests/actions.at (Location Print): New tests.

2012-11-30  Akim Demaille  <akim@lrde.epita.fr>

formatting changes
	* data/c.m4: Fix comments, put macros in a more natural order.
	Space changes (from M-x whitespace-cleanup).
	* src/location.c: Fix spaces.
	* tests/actions.at: Space changes.

2012-11-30  Akim Demaille  <akim@lrde.epita.fr>

glr.c: remove stray macro
	* data/glr.c (YYOPTIONAL_LOC): Remove, unused since commit
	769a8ef9bcb5e14d0be9d0869f5dca20ab093930.

2012-11-29  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  doc: minor fixes
	  doc: improve the index
	  doc: introduce api.pure full, rearrange some examples
	  yacc.c: support "%define api.pure full"
	  local.at: improvements

2012-11-29  Akim Demaille  <akim@lrde.epita.fr>

doc: minor fixes
	* doc/bison.texi: Use stderr for error messages.
	Meta-variables are usually spelled in lower case.
	Use @code for function names.

2012-11-29  Akim Demaille  <akim@lrde.epita.fr>

doc: improve the index
	* doc/bison.texi: Fix uses of "deffn" so that the arguments of the
	directives do not show in the index.
	Remove a duplicate entry for api.pure.

2012-11-29  Theophile Ranquet  <ranquet@lrde.epita.fr>

doc: introduce api.pure full, rearrange some examples
	* NEWS: Add entry.
	* doc/bison.texi (%define Summary): Show the old Yacc behaviour.
	(Parser Function): Move parse-param examples here.
	(Pure Calling): Remove parse-param examples.
	(Error Reporting): Don't show the old behavior, stick to 'full'.

2012-11-29  Theophile Ranquet  <ranquet@lrde.epita.fr>

yacc.c: support "%define api.pure full"
	This makes the interface for yyerror() pure without the need for a spurious
	parse_param.

* data/yacc.c (b4_pure_if, b4_pure_flag): New definition, accept three states.
	(b4_yacc_pure_if): Rename as...
	(b4_yyerror_arg_loc_if): This, and use b4_pure_flag.
	* tests/actions.at (%define api.pure): Modernize.
	* test/calc.at (Simple LALR Calculator): Modernize.
	* tests/local.at (AT_YYERROR_ARG_LOC_IF): Adjust.

2012-11-28  Akim Demaille  <akim@lrde.epita.fr>

tests: check variants without locations
	* tests/c++.at (Variants): Support non-use of locations, and
	check its support.

2012-11-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

local.at: improvements
	* tests/local.at (AT_YYERROR_FORMALS): Make llocp const.
	(AT_PURE_AND_LOC_IF, AT_GLR_OR_PARAM_IF): Remove, expand...
	(AT_YYERROR_ARG_LOC_IF): Here, and use m4_join for readability.

2012-11-26  Akim Demaille  <akim@lrde.epita.fr>

tests: use -fno-strict-aliasing with variants
	Reported by Théophile Ranquet.

* configure.ac (NO_STRICT_ALIAS_CXXFLAGS): New.
	* tests/c++.at, tests/atlocal.in, examples/local.mk: Use it.

2012-11-26  Akim Demaille  <akim@lrde.epita.fr>

tests: remove leftover
	* tests/atlocal.in: Remove duplicate handling of --compile-c-with-cxx.

2012-11-26  Akim Demaille  <akim@lrde.epita.fr>

doc: use %precedence instead of nonassoc when associativity is not wanted
	* doc/bison.texi: here.
	Formatting changes in some grammars.
	Fix a %prec into %precedence.

2012-11-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  yacc.c: always initialize yylloc
	  scanner: issue a single error for groups of invalid characters
	  tests: formatting changes
	  doc: one of the fixes for an ambiguous grammar was ambiguous too
	  doc: fix the dangling else with precedence directives
	  doc: prefer "token" to TOKEN
	  doc: formatting changes
	  scanner: use explicit "ignore" statements

2012-11-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/branch-2.6' into maint
	* origin/branch-2.6:
	  yacc.c: always initialize yylloc
	  doc: one of the fixes for an ambiguous grammar was ambiguous too
	  doc: fix the dangling else with precedence directives
	  doc: prefer "token" to TOKEN
	  doc: formatting changes

2012-11-23  Theophile Ranquet  <ranquet@lrde.epita.fr>

yacc.c: always initialize yylloc
	The initial location might be used if the parser starts by an empty
	reduction, so really ensure proper initialization of the initial
	location.  The previous approach fails for PostgreSQL, which uses
	Reported by Peter Eisentraut.
	http://lists.gnu.org/archive/html/bug-bison/2012-11/msg00023.html
	With help from Théophile Ranquet.

* data/yacc.c (b4_declare_scanner_communication_variables): Be sure
	to initialize yylloc, even when its structure is unknown.
	(yyparse): Simplify the call to b4_dollar_pushdef.
	* tests/actions.at (Initial location): Check of similar pattern
	as in the case of PostgreSQL.

2012-11-23  Akim Demaille  <akim@lrde.epita.fr>

scanner: issue a single error for groups of invalid characters
	* src/scan-gram.l: Scan groups of invalid characters together.
	* tests/input.at, tests/named-refs.at: Adjust.

2012-11-23  Akim Demaille  <akim@lrde.epita.fr>

tests: formatting changes
	* tests/named-refs.at: Here.

2012-11-23  Akim Demaille  <akim@lrde.epita.fr>

doc: one of the fixes for an ambiguous grammar was ambiguous too
	Reported by Аскар Сафин.
	http://lists.gnu.org/archive/html/bug-bison/2012-11/msg00024.html

* doc/bison.texi (Reduce/Reduce): Fix the resulting ambiguity using
	precedence/associativity directives.

2012-11-22  Akim Demaille  <akim@lrde.epita.fr>

doc: fix the dangling else with precedence directives
	* doc/bison.texi (Non Operators): New node.
	(Shift/Reduce): Point to it.
	Don't promote "%expect n" too much.

2012-11-22  Akim Demaille  <akim@lrde.epita.fr>

doc: prefer "token" to TOKEN
	This is more readable in short examples.

* doc/bison.texi (Shift/Reduce): here.
	Make "win" and "lose" action more alike.

2012-11-22  Akim Demaille  <akim@lrde.epita.fr>

doc: formatting changes
	* doc/bison.texi: Use @group.

2012-11-14  Akim Demaille  <akim@lrde.epita.fr>

scanner: use explicit "ignore" statements
	* src/scan-gram.l: here.

2012-11-13  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  tests: close files in glr-regression
	  xml: match DOT output and xml2dot.xsl processing
	  xml: factor xslt space template
	  graph: fix a memory leak
	  xml: documentation
	  output: capitalize State

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: close files in glr-regression
	* tests/glr-regression.at: Here.

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

xml: match DOT output and xml2dot.xsl processing
	Make the DOT produced by XSLT processing equivalent to the one made with the
	--graph option.

* data/xslt/xml2dot.xsl: Stylistic changes, and add support for reductions.
	* doc/bison.texi (Xml): Update.
	* src/graphviz.c (conclude_red): Minor stylistic changes to DOT internals.
	(output_red): Swap enabled and disabled reductions output, for coherence
	with XSLT output.
	* src/print_graph.c (print_core): Minor stylistic change to States' output.
	(print_actions): Swap order of output for reductions and transitions.
	* tests/local.at (AT_BISON_CHECK_XML): Ignore differences in order.
	* tests/output.at: Adjust to changes in DOT internals.

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

xml: factor xslt space template
	* data/xslt/bison.xsl (space): New, import from...
	* data/xslt/xml2text.xsl: Here.

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

graph: fix a memory leak
	* src/graphviz.c (output_red): Here.

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

xml: documentation
	The XML output combined with the XSL Transformations provided in data/ are
	incredibly useful, they should be documented.

* doc/bison.texi (Xml): New node.

2012-11-12  Theophile Ranquet  <ranquet@lrde.epita.fr>

output: capitalize State
	* src/print.c (print_state): Here.
	* tests/conflicts.at, tests/existing.at, tests/local.at, tests/reduce.at,
	tests/regression.at, tests/sets.at: Adjust.

2012-11-12  Akim Demaille  <akim@lrde.epita.fr>

tests: fix syntax-check errors
	Reported by Théophile Ranquet.

* tests/c++.at: Use AT_PARSER_CHECK.
	Avoid using "strcmp", which triggers an error from syntax-check.

2012-11-12  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: address syntax-check errors.
	  tests: use valgrind where appropriate
	  tests: use valgrind where appropriate
	  tests: don't expect $EGREP to support -w
	  tests: more possible error compiler messages for "#error"

2012-11-12  Akim Demaille  <akim@lrde.epita.fr>

maint: address syntax-check errors.
	* cfg.mk: Ignore the "error" call in tests/c++.at, it is not to be
	translated.
	* doc/bison.texi: Fix incorrect @pxref use.
	* po/POTFILES.in: Add missing file.
	* src/print_graph.c: Remove useless include.

2012-11-12  Akim Demaille  <akim@lrde.epita.fr>

tests: use valgrind where appropriate
	Reported by Théophile Ranquet.

* cfg.mk (sc_at_parser_check): New.
	* tests/c++.at: Fix use of AT_CHECK vs. AT_PARSER_CHECK.

2012-11-12  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/branch-2.6' into maint
	* origin/branch-2.6:
	  tests: use valgrind where appropriate
	  tests: don't expect $EGREP to support -w

2012-11-10  Akim Demaille  <akim@lrde.epita.fr>

tests: use valgrind where appropriate
	Reported by Théophile Ranquet.

* tests/glr-regression.at: Rewrite some test cases so that AT_PARSER_CHECK,
	which runs valgrind, is exposed with the parser, not with "echo".
	* tests/local.at, tests/regression.at, tests/headers.at:
	Use AT_PARSER_CHECK for generated parsers.

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

tests: don't expect $EGREP to support -w
	Does not work on Solaris 10.  Reported by Dennis Clarke.
	http://lists.gnu.org/archive/html/bug-bison/2012-11/msg00009.html
	* tests/headers.at (Several parsers): Use Perl instead.
	While at it, run it only once, on all the generated headers.
	Adjust to YY_NULL be defined in position.hh.

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

tests: more possible error compiler messages for "#error"
	* tests/synclines.at (AT_SYNCLINES_COMPILE): Adjust for Clang.
	Verified with GCC 4.0, 4.2 to 4.8, and Clang 2.9, 3.2: none skip.

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  regen
	  maint: post-release administrivia
	  version 2.6.5
	  regen
	  tests: syntax-check
	  tests: beware of compilers that do not support POSIXLY_CORRECT
	  gnulib: update

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-11-08  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'branch-2.6' into maint
	* origin/branch-2.6:
	  maint: post-release administrivia
	  version 2.6.5
	  regen
	  tests: syntax-check
	  tests: beware of compilers that do not support POSIXLY_CORRECT
	  gnulib: update

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.5
	* NEWS: Record release date.

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

tests: syntax-check
	* tests/actions.at: Fix typo.

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

tests: beware of compilers that do not support POSIXLY_CORRECT
	Running "maintainer-release-check" on OS X with Clang 2.9 fails,
	because "clang-mp-2.9 -o test -g test.c" launches "/usr/bin/dsymutil
	test -o test.dSYM" which fails with "error: unable to open executable
	'-o'".

* m4/c-working.m4 (BISON_CHECK_WITH_POSIXLY_CORRECT)
	(BISON_C_COMPILER_POSIXLY_CORRECT): New.
	* configure.ac: Use the latter.
	* tests/atlocal.in (POSIXLY_CORRECT_IS_EXPORTED): New.
	* tests/local.at (AT_BISON_CHECK_WARNINGS_): Use it instead of computing its
	value each time.
	(AT_QUELL_VALGRIND): Skip tests that cannot work because of compilers
	that do not support POSIXLY_CORRECT.

2012-11-07  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint: (24 commits)
	  tests: calc: modernize the use of locations
	  tests: remove useless location initializations
	  lalr1.cc: always initialize yylval.
	  tests: check that C and C++ objects can be linked together.
	  yacc.c: also disable -Wuninitialized.
	  glr.cc, yacc.c: initialize yylloc properly
	  yacc.c, glr.c: a better YY_LOCATION_PRINT
	  yacc.c: simplify initialization
	  doc: formatting changes
	  c++: fix position operator signatures
	  tests: remove useless location initialization.
	  tests: fix locations in C
	  tests: handle %parse-param in the generated yyerror
	  tests: simplifications
	  grammars: fix display of nul character in error message
	  tests: sort
	  tests: cosmetic changes
	  comment changes
	  autoconf: update
	  gnulib: update
	  ...

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'branch-2.6' into maint
	* origin/branch-2.6: (24 commits)
	  tests: calc: modernize the use of locations
	  tests: remove useless location initializations
	  lalr1.cc: always initialize yylval.
	  tests: check that C and C++ objects can be linked together.
	  yacc.c: also disable -Wuninitialized.
	  glr.cc, yacc.c: initialize yylloc properly
	  yacc.c, glr.c: a better YY_LOCATION_PRINT
	  yacc.c: simplify initialization
	  doc: formatting changes
	  c++: fix position operator signatures
	  tests: remove useless location initialization.
	  tests: fix locations in C
	  tests: handle %parse-param in the generated yyerror
	  tests: simplifications
	  grammars: fix display of nul character in error message
	  tests: sort
	  tests: cosmetic changes
	  comment changes
	  autoconf: update
	  gnulib: update
	  ...

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

tests: calc: modernize the use of locations
	* tests/calc.at: Don't initialize the location, let the parser
	do it.
	Use a $printer.
	Change some testing input to be easier to distinguish (instead of always
	"0 0" for instance).

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

tests: remove useless location initializations
	* tests/actions.at, tests/calc.at: here.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: always initialize yylval.
	* data/lalr1.cc: here.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

tests: check that C and C++ objects can be linked together.
	* tests/local.at (AT_SKIP_IF_CANNOT_LINK_C_AND_CXX): New.
	* tests/headers.at (Several parsers): Use it.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: also disable -Wuninitialized.
	* data/yacc.c (YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN): For some versions
	of GCC, -Wmaybe-uninitialized alone does not suffice.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

glr.cc, yacc.c: initialize yylloc properly
	There are several issues to address here.  One is that yylloc should
	be initialized when possible.  Another is that the push parser needs
	to update yypushed_loc when the user modified it.  And if the parser
	starts by a reduction of an empty, it uses the first location on the
	stack, which, therefore, must also be initialized to this initial
	location.

This is getting complex, especially since because initializing a
	global (impure interface) is different from initializing a local
	variable.  To simplify, the local yylloc is not initialized during its
	definition.

* data/c.m4 (b4_yyloc_default_define): Replace by...
	(b4_yyloc_default): this.
	Adjust dependencies.
	* data/glr.cc: Initialize yylloc.
	* data/yacc.c (b4_declare_scanner_communication_variables):
	Initialize yylloc during its definition.
	Don't define yyloc_default.
	(yypush_parse): The location formal is not const, as we might
	initialize it.
	(yyparse): Define yyloc_default.
	Use it before running the user initial action.
	Possibly update the first location on the stack, and the pushed
	location after the user initial action.
	* tests/actions.at (Initial locations): Check that the initial
	location is correct.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

yacc.c, glr.c: a better YY_LOCATION_PRINT
	* data/c.m4 (b4_yy_location_print_define): New.
	Now issues "short" locations, e.g., "1.1" instead of "1.1-1.1".
	Was initially a function, but then we face "static but unused"
	warnings.
	Simpler as a macro.
	* tests/local.at, data/glr.c, data/yacc.c: Use it instead of duplicating.
	* tests/actions.at: Adjust expectations.

2012-11-06  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: simplify initialization
	* data/yacc.c: Fuse the initializations of yyssp, yyss and the like.
	Remove an obsolete comment: we do initialize these initial stack
	members (in some cases).

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

doc: formatting changes
	* doc/bison.texi: In a pointer type.

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

c++: fix position operator signatures
	* data/location.cc (operator+=, operator-=): Remove const from return
	type.

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

tests: remove useless location initialization.
	* tests/glr-regression.at: here.
	glr.c does initialize yylloc.

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

tests: fix locations in C
	* tests/local.at (AT_YYERROR_DEFINE): Don't display the end of the location
	if it is not after its beginning.
	* tests/actions.at, tests/cxx-type.at: Adjust the expected output.

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

tests: handle %parse-param in the generated yyerror
	* tests/local.at (AT_PARSE_PARAMS): New.
	(AT_YYERROR_FORMALS, AT_YYERROR_DEFINE): Use it to add the parse-param
	to yyerror.
	* tests/calc.at, tests/regression.at: Use AT_YYERROR_DEFINE and
	AT_YYERROR_DECLARE, now that they handle properly the parse-params.
	Be sure to let AT_BISON_OPTION_PUSHDEFS now what parse-params are used.

2012-11-05  Akim Demaille  <akim@lrde.epita.fr>

tests: simplifications
	* tests/actions.at (Exotic Dollars): Formatting changes.
	Use AT_FULL_COMPILE.
	(AT_CHECK_PRINTER_AND_DESTRUCTOR): Remove useless initialization of @$.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: rename lex_symbol as api.token.constructor
	* data/bison.m4 (b4_lex_symbol_if): Rename as...
	(b4_token_ctor_if): this.
	Depend upon api.token.constructor.
	* data/c++.m4, data/lalr1.cc: Adjust.
	* doc/bison.texi: Fix all the occurrences of lex_symbol.
	* etc/bench.pl.in: Adjust.
	* examples/variant.yy: Likewise.

* tests/local.at (AT_BISON_OPTION_PUSHDEFS, AT_BISON_OPTION_POPDEFS):
	Handle AT_TOKEN_CTOR_IF.
	* tests/c++.at: Adjust to using api.token.constructor and AT_TOKEN_CTOR_IF.
	Simplify the test of both build call styles.
	(AT_CHECK_VARIANTS): Rename as...
	(AT_TEST): this.
	And undef when done.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

examples: simplify/improve
	* examples/variant.yy: Put yylex in yy::, and simplify accordingly.
	Minor formatting changes.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

bison.m4: support b4_*_if macros whose name differ from their variable
	* data/bison.m4 (b4_percent_define_if_define_, b4_percent_define_if_define):
	Accept a second argument.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

grammars: fix display of nul character in error message
	Reported by Marc Mendiola.
	http://lists.gnu.org/archive/html/help-bison/2012-10/msg00017.html

* gnulib: Update to get quote_mem.
	* src/scan-gram.l: Use it.
	* tests/input.at (Invalid inputs): Additional checks.
	* tests/named-refs.at: Likewise.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

tests: sort
	* tests/regression.at (Invalid inputs, Invalid inputs with {}): Move to...
	* tests/input.at: here, for consistency.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

tests: cosmetic changes
	* tests/actions.at (AT_CHECK_PRINTER_AND_DESTRUCTOR): Improve the
	displayed title.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

comment changes
	* data/lalr1.cc: here.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

autoconf: update
	There are comment changes only in the files we use.

2012-11-01  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-10-28  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-28  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: initialize yylval and yylloc.
	When generating a pure push parser, the initialization of yylval and
	yylloc may not be visible to the compiler.  With warnings enabled, GCC
	4.3.6, 4.4.7, 4.5.4, and 4.6.3 report uninitialized uses of
	yylval/yylloc.  Using local pragmas to disable these warnings is not
	supported before 4.6, and 4.6 does not support it properly.  So
	initialize yylval and yylloc at their definition.  Reported by Peter
	Simons.  See
	http://lists.gnu.org/archive/html/bison-patches/2012-10/msg00133.html

* data/c.m4 (b4_yyloc_default_define): New.
	* data/yacc.c: Use it when locations are requested.
	(YYLVAL_INITIALIZE): Replace by...
	(YY_INITIAL_VALUE): this.
	(yyparse): Initialize yylloc and yylval.
	Therefore, remove the initialization of yylloc's field.
	* data/glr.c: Likewise.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

graphs: fix spacing refactoring
	* src/print_graph.c (print_lhs, print_core): Here.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: make deprecation tests more specific
	* tests/input.at (Deprecated directives): Here, don't generate unrelated errors
	or warnings.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: fix AT_BISON_CHECK_WARNINGS_ stderr rewriting
	* tests/input.at (Deprecated directives): Avoid spurious error.
	* tests/locat.at (AT_BISON_CHECK_WARNINGS): Adjust for recent changes.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

scan-skel.l: consider m4 notes as related to "complaint" errors
	* src/scan-skel.l (flag): Here.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

warnings: distinguish context information based on warning type
	* src/scan-code.l (show_sub_message, show_sub_messages): Take a new warnings
	argument.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

warnings: fix early exit of warnings treated as errors
	Treating warnings as errors caused Bison to exit earlier than needed, making it
	hide warnings that would have been printed had -Werror not been set.

Also, fix a bug that caused some context information of errors to not be
	shown.

* src/complain.c (complaint_issued): Rename as...
	(complaint_status): This, and change its type from boolean to
	* src/complain.h (err_status): This, new enumeration.
	* src/main.c (main): Adjust (only finish early if an actual complaint was
	risen, not a mere warning treated an error).
	* src/reader.c: Adjust.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

tests: reindent for legibility
	* tests/local.at (AT_BISON_CHECK_WARNINGS_): Here.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

build: fix Texinfo compilation
	* doc/local.mk: fix dependencies.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint: (46 commits)
	  doc: minor style change
	  maint: use gendocs's new -I option
	  regen
	  yacc.c: do not define location support when not using locations
	  maint: be compilable with GCC 4.0
	  tests: address a warning from GCC 4.4
	  tests: don't use options that Clang does not support
	  tests: restore the tests on -Werror
	  regen
	  parse-gram: update the Bison interface
	  fix comment
	  maint: post-release administrivia
	  version 2.6.4
	  regen
	  2.6.4: botched 2.6.3
	  maint: post-release administrivia
	  version 2.6.3
	  gnulib: update
	  tests: check %no-lines
	  NEWS: warnings with clang
	  ...

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'branch-2.6' into maint
	* origin/branch-2.6:
	  regen
	  yacc.c: do not define location support when not using locations
	  maint: be compilable with GCC 4.0
	  tests: address a warning from GCC 4.4
	  tests: don't use options that Clang does not support
	  tests: restore the tests on -Werror
	  regen
	  parse-gram: update the Bison interface
	  fix comment

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

doc: minor style change
	* doc/figs/example-reduce.txt: here.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

maint: use gendocs's new -I option
	* gnulib: Update gendocs.
	* cfg.mk (gendocs_options_): New.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: don't use _Pragma GCC diagnostic with 4.6
	Reported by Peter Simons.
	http://lists.gnu.org/archive/html/bug-bison/2012-10/msg00033.html

* data/yacc.c (b4_declare_scanner_communication_variables): 4.7
	seems fine though.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: do not define location support when not using locations
	* data/yacc.c (YYLLOC_DEFAULT, YYRHSLOC): Don't define when not
	using locations.

2012-10-26  Akim Demaille  <akim@lrde.epita.fr>

maint: be compilable with GCC 4.0
	The "shadows a global declaration" warning in GCC 4.0 was a bit
	annoying.  It does not like that a type name be used in a prototype of
	a function (not the implementation, just the declaration):

In file included from src/LR0.c:38:
	  src/reader.h:56: warning: declaration of 'named_ref' shadows a
	                            global declaration
	  src/named-ref.h:35: warning: shadowed declaration is here

It does not like either when a global variable name is used in a
	prototype.  Flex 2.5.37 generates this prototype:

void gram_set_debug (int debug_flag  );

* src/getargs.h, src/getargs.c (debug_flag): Rename as...
	(debug): this.
	Adjust dependencies.
	* src/reader.h: Don't use "named_ref" as a formal argument name.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

misc: document TESTSUITEFLAGS in README-hacking
	* README-hacking: Document -j and -k flags.

2012-10-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

deprecation: add tests
	* tests/input.at (Deprecated directives warn, Non-deprecated
	directives don't, Unput doesn't mess up locations): New tests.

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

tests: address a warning from GCC 4.4
	236. torture.at:465: testing Exploding the Stack Size with Alloca ...
	../../../tests/torture.at:474: bison -o input.c input.y
	../../../tests/torture.at:474: $CC $CFLAGS $CPPFLAGS $LDFLAGS -o input input.c $LIBS
	stderr:
	cc1: warnings being treated as errors
	input.y: In function 'main':
	input.y:60: error: 'status' may be used uninitialized in this function

* tests/torture.at (AT_DATA_STACK_TORTURE): Initial status to avoid
	the previous error.

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

tests: don't use options that Clang does not support
	* configure.ac (WARN_CFLAGS, WARN_CXXFLAGS): Do not include options
	that Clang does not support.

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

tests: restore the tests on -Werror
	When run as /bin/sh, Bash sets the shell variable POSIXLY_CORRECT to
	y.  The test suite checks for the envvar POSIXLY_CORRECT to turn of
	some tests not supported in POSIX mode.  Restore these tests.

Reported by the Hydra build farm, from Rob Vermaas.

* tests/local.at (AT_BISON_CHECK_WARNINGS_): Check the envvar
	POSIXLY_CORRECT, not the shell variable.

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

parse-gram: update the Bison interface
	* src/parse-gram.y (%pure-parser, %name-prefix): Replace with...
	(%define api.pure, %define api.prefix)
	* src/location.h, src/scan-gram.h: Adjust to api.prefix.

2012-10-25  Akim Demaille  <akim@lrde.epita.fr>

fix comment
	* data/c.m4 (b4_YYDEBUG_define): here.

2012-10-24  Theophile Ranquet  <ranquet@lrde.epita.fr>

regen

2012-10-24  Theophile Ranquet  <ranquet@lrde.epita.fr>

deprecation: issue warnings in scanner
	* src/parse-gram.y: Move the handling of (three) deprecated constructs ...
	* src/scan-gram.l: ...Here, and issue warnings.
	(DEPRECATED): New.

2012-10-23  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'branch-2.6' into maint
	* origin/branch-2.6:
	  maint: post-release administrivia
	  version 2.6.4
	  regen
	  2.6.4: botched 2.6.3

2012-10-23  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-10-23  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.4
	* NEWS: Record release date.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

2.6.4: botched 2.6.3
	* NEWS: here.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

Merge branch '2.6.3' into maint
	* 2.6.3: (22 commits)
	  maint: post-release administrivia
	  version 2.6.3
	  gnulib: update
	  tests: check %no-lines
	  NEWS: warnings with clang
	  warnings: avoid warnings from clang
	  tests: no longer disable -O compiler options
	  yacc.c: initialize yylval in pure-parser mode
	  skeletons: style changes
	  tests: minor improvements
	  tests: use $PERL instead of perl
	  build: look for Perl in configure.
	  tests: fix sed portability issues
	  tests: diff -u is not portable
	  maint: word changes
	  lalr1.cc: fix test suite portability
	  maint: fix an erroneous include
	  tests: check that headers are self contained
	  doc: add missing documentation for --report
	  headers: move CPP guards into YY_*_INCLUDED to avoid collisions
	  ...

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.3
	* NEWS: Record release date.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: check %no-lines
	* tests/synclines.at: here.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

NEWS: warnings with clang
	* NEWS: here.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

warnings: avoid warnings from clang
	Fix the following warning

parse-gram.c:2078:14: error: equality comparison with extraneous parentheses
	                        [-Werror,-Wparentheses-equality]
	    if (((yyn) == (-91)))
	         ~~~~~~^~~~~~~~
	  parse-gram.c:2078:14: note: remove extraneous parentheses around the
	                        comparison to silence this warning
	    if (((yyn) == (-91)))
	        ~      ^       ~
	  parse-gram.c:2078:14: note: use '=' to turn this equality comparison into
	                        an assignment
	    if (((yyn) == (-91)))
	               ^~
	               =
	  1 error generated.

and the following one:

input.cc:740:1: error: function declared 'noreturn' should not return
	                         [-Werror,-Winvalid-noreturn]
	  static void yyMemoryExhausted (yyGLRStack* yystackp)
	    __attribute__ ((__noreturn__));
	  static void
	  yyMemoryExhausted (yyGLRStack* yystackp)
	  {
	    YYLONGJMP (yystackp->yyexception_buffer, 2);
	  }
	  ^
	  1 warning and 1 error generated.

This is Apple clang version 3.1 (tags/Apple/clang-318.0.61).

* data/c.m4 (b4_table_value_equals): Use (!!(A == B)) instead of (A == B)
	to avoid this warning.
	Any reasonable compiler should generate the same code.
	* src/uniqstr.h (UNIQSTR_EQ): Likewise.
	* data/glr.c (LONGJMP): abort after longjmp to pacify clang.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: no longer disable -O compiler options
	Tests are running without -O since
	f377f69fec28013c79db4efe12bbb9d48987fb2c because some warnings (about
	yylval not being initialized) show only when GCC is given -O2.  The
	previous patch fixes the warnings. Run the test suite with compiler
	options unmodified.

* tests/atlocal.in (O0CFLAGS, O0CXXFLAGS): Remove, use CFLAGS and
	CXXFLAGS.

2012-10-22  Paul Eggert  <eggert@cs.ucla.edu>

yacc.c: initialize yylval in pure-parser mode
	See http://lists.gnu.org/archive/html/bison-patches/2012-08/msg00024.html
	(spreading over September and October).

* data/yacc.c (YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN)
	(YY_IGNORE_MAYBE_UNINITIALIZED_END, YYLVAL_INITIALIZE):
	New macros.  Use them to suppress an unwanted GCC diagnostic.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

skeletons: style changes
	* data/yacc.c, data/glr.c: Prefer Title case for (CPP) macro arguments.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: minor improvements
	* tests/c++.at: Space changes.
	Use AT_YYERROR_DEFINE.
	* tests/local.at (AT_YYERROR_DEFINE): Issue errors on unknown languages.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: use $PERL instead of perl
	* tests/atlocal.in (PERL): New.
	Sort.
	* tests/calc.at, tests/input.at, tests/local.at, tests/regression.at,
	* tests/skeletons.at, tests/synclines.at, tests/torture.at: here.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

build: look for Perl in configure.
	Bison uses "/usr/bin/perl" or "perl" in several places, and it does
	not appear to be a problem.  But, at least to make it simpler to
	change PERL on the make command line, check for perl in configure.

* configure.ac (PERL): New.
	* doc/Doxyfile.in, doc/Makefile.am, tests/bison.in: Use it.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: fix sed portability issues
	Reported by Didier Godefroy,
	<http://lists.gnu.org/archive/html/bug-bison/2012-10/msg00005.html>.

* tests/calc.at (AT_CHECK_SPACES): Use Perl.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: diff -u is not portable
	Reported by Didier Godefroy
	<http://lists.gnu.org/archive/html/bug-bison/2012-10/msg00006.html>.

* tests/existing.at (AT_LALR1_DIFF_CHECK): Skip if diff -u does not
	work.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

maint: word changes
	* README-hacking (Typical errors): Improve wording.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: fix test suite portability
	Reported by Rob Vermaas' Hydra build farm on x86_64-darwin 10.2.0 with
	G++ 4.6.3.

* tests/headers.at (Several parsers): Include AT_DATA_SOURCE_PROLOGUE
	in the files to compile.
	* data/location.cc: Do not include twice string and iostream (once
	by position.hh, and then by location.hh).
	* README-hacking (Typical errors): Some hints for other maintainers.

2012-10-22  Theophile Ranquet  <theophile.ranquet@gmail.com>

maint: fix an erroneous include
	This fixes test 130 (Several parsers).

* data/location.cc: Include <iostream> rather than <iosfwd> since
	we really need << on strings for instance.
	* NEWS: Document this.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

tests: check that headers are self contained
	Reported by Alexandre Duret-Lutz.

* tests/headers.at (Several parsers): here.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

doc: add missing documentation for --report
	* doc/bison.texi (Bison Options): Document --report's "solved", "all",
	and "none".

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

headers: move CPP guards into YY_*_INCLUDED to avoid collisions
	See <http://lists.gnu.org/archive/html/bug-bison/2012-09/msg00016.html>.

* data/c.m4 (b4_cpp_guard): Prepend YY_ and append _INCLUDED.
	* tests/headers.at: Adjust.
	* NEWS, doc/bison.texi: Document.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

minor changes.
	* NEWS: Word changes.
	* doc/bison.texi: Spell check.
	Fix minor issues.
	* tests/headers.at: Comment and formatting changes.

2012-10-22  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-10-19  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-10-19  Akim Demaille  <akim@lrde.epita.fr>

xml: slight improvement of the DOT output
	This was completely forgotten...  Nothing about XML is actually
	documented...

* data/xslt/xml2dot.xsl: Use boxes, and Courier font.

2012-10-19  Akim Demaille  <akim@lrde.epita.fr>

maint: check for dot before using it
	* configure.ac: here.
	* doc/Makefile.am: Use $(DOT).
	Ship the generated files, to spare the user the need for Graphviz.

2012-10-18  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: documentation
	Note that 'make web-manual' fails.

* NEWS: Document these changes.
	* doc/Makefile.am: Adjust to generate example files.
	* doc/bison.texi: Add a Graphviz section after "Understanding::", the section
	describing the .output file, because these are similar.
	* doc/figs/example-reduce.dot, doc/figs/example-reduce.txt,
	doc/figs/example-shift.dot, doc/figs/example-shift.txt: New, minimal
	examples to illustrate the documentation.

2012-10-18  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: add tests, introducing -k graph
	* tests/output.at (AT_TEST): New.
	Use it to add 6 --graph tests.

2012-10-18  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: change the output format of the rules
	Use something similar to the report file.

* src/print_graph.c (print_lhs): New, obstack equivalent of rule_lhs_print.
	(print_core): Use here.

2012-10-18  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: style changes
	* src/graphviz.c (start_graph): Use courier font.
	(conclude_red): Use commas to separate attributes. Show the acceptation
	as a special reduction, with a blue color and an "Acc" label. Show the
	lookahead tokens between square brackets.
	(output_red): No longer label default reductions.
	* src/print_graph.c (print_core): Refactor spacing, and print an
	additional space between a rule's rhs and its lookahead tokens. Also,
	capitalize "State".
	(print_actions): Style, move a declaration.

2012-10-18  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: address an issue with R/R conflicts
	All disabled reductions should now be shown as such.

* src/graphviz.c (output_red): Here.
	(conclude_red): New.

2012-10-16  Akim Demaille  <akim@lrde.epita.fr>

news: spell check
	* NEWS: here.

2012-10-16  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  java: use api.location.type and api.position.type

2012-10-16  Akim Demaille  <akim@lrde.epita.fr>

variables: use singular in %define variable names
	See http://lists.gnu.org/archive/html/bison-patches/2012-02/msg00045.html

* doc/bison.texi, src/lalr.c, src/main.c, src/muscle-tab.c,
	* src/print.c, src/reader.c, src/tables.c, tests/conflicts.at,
	* tests/input.at, tests/reduce.at:
	s/lr.default-reductions/lr.default-reduction/
	s/lr.keep-unreachable-states/lr.keep-unreachable-state/.
	* NEWS: Document.

2012-10-16  Akim Demaille  <akim@lrde.epita.fr>

java: fixes
	* data/java.m4: Remove stray M4 characters.

2012-10-16  Akim Demaille  <akim@lrde.epita.fr>

api.tokens.prefix -> api.token.prefix
	See
	http://lists.gnu.org/archive/html/bison-patches/2012-02/msg00045.html
	Note that api.tokens.prefix has not been released, yet.

* NEWS, data/bison.m4, doc/bison.texi, tests/c++.at,
	* tests/calc.at, tests/java.at, tests/local.at: Do it.
	* src/muscle-tab.c (muscle_percent_variable_update): Ensure
	backward compatibility.

2012-10-15  Theophile Ranquet  <theophile.ranquet@gmail.com>

scan-skel.l: shift complain_args arguments
	Because argv[0] is never used, shift it out from the argument list.

* src/complain.c (complain_args): Here.
	* src/scan-skel.l (at_complain): Adjust argv and argc.

2012-10-15  Theophile Ranquet  <theophile.ranquet@gmail.com>

scan-skel.l: formatting changes
	* src/scan-skel.l (fail_for_at_directive_too_few_args): Here.

2012-10-12  Akim Demaille  <akim@lrde.epita.fr>

java: use api.location.type and api.position.type
	* data/java.m4: here.
	* NEWS, doc/bison.texi, tests/java.at: Adjust.

2012-10-12  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  tests: check %no-lines
	  tests: minor simplification
	  graphs: stylistic changes.
	  graphs: minor style changes
	  graphs: show reductions
	  graphs: style: prefix state number with "state"
	  graphs: style: use left justification for states
	  graphs: style: prefix rules and change shapes
	  obstack: import obstack_finish0 from master
	  c++: api.location.type
	  muscles: a function for backward compatibility
	  maint: more macros

2012-10-12  Akim Demaille  <akim@lrde.epita.fr>

tests: check %no-lines
	* tests/synclines.at: here.

2012-10-12  Akim Demaille  <akim@lrde.epita.fr>

tests: minor simplification
	* tests/headers.at (Several parsers): Use *.y even for C++.

2012-10-11  Akim Demaille  <akim@lrde.epita.fr>

graphs: stylistic changes.
	* src/graphviz.c (output_red): Comment and formatting changes.

2012-10-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

graphs: minor style changes
	* src/graphviz.c (output_red): Fix C90 issues.
	Reduce variable scopes.

2012-10-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

graphs: show reductions
	* src/graphviz.c (output_red): New, show reductions on the graph.
	(no_reduce_bitset_init): New, initialize a bitset.
	(print_token): New, print a lookahead token.
	(escape): New, print "foo" as \"foo\" because Dot doesn't like quotes within
	a label.

* src/graphviz.h : Adjust.
	* src/print_graph.c (print_actions): Call output_red here.

2012-10-11  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: style: prefix state number with "state"
	* src/print_graph.c (print_core): Here.

2012-10-11  Theophile Ranquet  <ranquet@lrde.epita.fr>

graphs: style: use left justification for states
	The label text of nodes is centered "by default" (by the use of '\n' as
	a line feed). This gives bad readability to the grammar rules shown in
	state nodes, a left justification is much nicer. This is done by using '\l'
	as the line feed.

In order to allow \l in the DOT file, changes to the quoting system seem
	necessary.

* src/print_graph.c (print_core): Escape tokens here, instead of...
	* src/graphviz.c (output_node): Here...
	(escape): Using this, new.

2012-10-11  Theophile Ranquet  <theophile.ranquet@gmail.com>

graphs: style: prefix rules and change shapes
	* src/graphviz.c (start_graph): Use box rather than ellipsis.
	* src/print_graph.c (print_core): Prefix rules with their number.

2012-10-11  Theophile Ranquet  <theophile.ranquet@gmail.com>

obstack: import obstack_finish0 from master
	* src/system.h (obstack_finish0): New.

2012-10-11  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  NEWS: warnings with clang
	  warnings: avoid warnings from clang
	  tests: no longer disable -O compiler options
	  yacc.c: initialize yylval in pure-parser mode
	  skeletons: style changes
	  lalr1.cc: document exception safety
	  lalr1.cc: check exception safety of error handling
	  lalr1.cc: check (and fix) %printer exception safety
	  lalr1.cc: check (and fix) %initial-action exception safety
	  lalr1.cc: fix exception safety
	  lalr1.cc: check exception safety.
	  lalr1.cc: indentation fixes.
	  lalr1.cc: don't leave macros define to nothing
	  tests: minor improvements
	  tests: use $PERL instead of perl
	  build: look for Perl in configure.
	  tests: fix sed portability issues
	  tests: diff -u is not portable

2012-10-09  Akim Demaille  <akim@lrde.epita.fr>

c++: api.location.type
	This feature was introduced in 95a2de5695670ae0df98cb3c42141cad549f0204
	(which is part of 2.5), but not documented.  Give it a proper name, and
	make it public.

* data/c++.m4, data/lalr1.cc, data/glr.cc, data/java.m4: Use
	api.location.type instead of location_type.
	* src/muscle-tab.c (muscle_percent_variable_update): Map the latter to
	the former.
	* tests/local.at: Adjust.
	* tests/calc.at: Use api.location.type.
	Leave tests/java.at with location_type, at least for the time being,
	to cover both names.
	* doc/bison.texi: Document api.location.type.
	(User Defined Location Type): New.
	* NEWS: Update.

2012-10-09  Akim Demaille  <akim@lrde.epita.fr>

muscles: a function for backward compatibility
	Based on commit 171ad99d6421935a278656be6dc7161591835d00 from master.

* src/muscle-tab.c (muscle_percent_variable_update): New.
	(muscle_percent_define_insert): Use it.
	Define the variables with their initial value.

2012-10-09  Akim Demaille  <akim@lrde.epita.fr>

maint: more macros
	* src/output.c (ARRAY_CARDINALITY): Move to...
	* src/system.h: here.
	(STREQ, STRNEQ): new.

2012-10-08  Akim Demaille  <akim@lrde.epita.fr>

NEWS: warnings with clang
	* NEWS: here.

2012-10-08  Akim Demaille  <akim@lrde.epita.fr>

warnings: avoid warnings from clang
	Fix the following warning

and the following one:

This is Apple clang version 3.1 (tags/Apple/clang-318.0.61).

2012-10-08  Akim Demaille  <akim@lrde.epita.fr>

* tests/atlocal.in (O0CFLAGS, O0CXXFLAGS): Remove, use CFLAGS and
	CXXFLAGS.

2012-10-08  Paul Eggert  <eggert@cs.ucla.edu>

yacc.c: initialize yylval in pure-parser mode
	See http://lists.gnu.org/archive/html/bison-patches/2012-08/msg00024.html
	(spreading over September and October).

* data/yacc.c (YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN)
	(YY_IGNORE_MAYBE_UNINITIALIZED_END, YYLVAL_INITIALIZE):
	New macros.  Use them to suppress an unwanted GCC diagnostic.

2012-10-08  Akim Demaille  <akim@lrde.epita.fr>

skeletons: style changes
	* data/yacc.c, data/glr.c: Prefer Title case for (CPP) macro arguments.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: document exception safety
	* NEWS: here.
	* doc/bison.texi (Destructor Decl, C++ Parser Interface): and there.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: check exception safety of error handling
	* tests/c++.at (Exception safety): Don't use swap here, it
	is useless.
	Cover more test cases: yyerror, YYERROR, YYABORT, and
	error recovery.
	(Object): Instead of just keeping a counter of instances, keep
	a list of them.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: check (and fix) %printer exception safety
	* tests/c++.at (Exception safety): Let the parser support the --debug
	option.
	On 'p', throw an exception from the %printer.
	* data/lalr1.cc (yyparse): Do not display the values we discard, as it
	uses %printer, which might have thrown the exception.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: check (and fix) %initial-action exception safety
	* data/lalr1.cc: Check size > 1, rather than size != 1, when cleaning
	the stack, as at the beginning, size is 0.
	* tests/c++.at (Exception safety): Check exception safety in
	%initial-action.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: fix exception safety
	lalr1.cc does not reclaim its memory when ended by an exception.

Reported by Oleksii Taran:
	http://lists.gnu.org/archive/html/help-bison/2012-09/msg00000.html

* data/lalr1.cc (yyparse): Protect the whole yyparse by a try-catch
	block that cleans the stack and the lookahead.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: check exception safety.
	* tests/c++.at (Exception safety): New.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: indentation fixes.
	* data/lalr1.cc (yyparse): here.
	Untabify a block of code.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: don't leave macros define to nothing
	* data/lalr1.cc (YY_SYMBOL_PRINT, YY_REDUCE_PRINT, YY_STACK_PRINT):
	Define to something so that, for instance, "if (foo) YY_SYMBOL_PRINT"
	is valid even when !YYDEBUG.

2012-10-06  Akim Demaille  <akim@lrde.epita.fr>

tests: minor improvements
	* tests/c++.at: Space changes.
	Use AT_YYERROR_DEFINE.
	* tests/local.at (AT_YYERROR_DEFINE): Issue errors on unknown languages.

2012-10-05  Akim Demaille  <akim@lrde.epita.fr>

* configure.ac (PERL): New.
	* doc/Doxyfile.in, doc/Makefile.am, tests/bison.in: Use it.

2012-10-05  Akim Demaille  <akim@lrde.epita.fr>

tests: fix sed portability issues
	Reported by Didier Godefroy,
	<http://lists.gnu.org/archive/html/bug-bison/2012-10/msg00005.html>.

* tests/calc.at (AT_CHECK_SPACES): Use Perl.

2012-10-05  Akim Demaille  <akim@lrde.epita.fr>

tests: diff -u is not portable
	Reported by Didier Godefroy
	<http://lists.gnu.org/archive/html/bug-bison/2012-10/msg00006.html>.

* tests/existing.at (AT_LALR1_DIFF_CHECK): Skip if diff -u does not
	work.

2012-10-04  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  maint: word changes
	  lalr1.cc: fix test suite portability
	  maint: fix an erroneous include
	  tests: check that headers are self contained
	  doc: add missing documentation for --report

2012-10-04  Akim Demaille  <akim@lrde.epita.fr>

scan-skel: use the scanner to reject all invalid directives
	* src/scan-skel.l: Use a simpler and more consistent pattern escaping
	scheme.
	Catch all the invalid directives here by just removing the previous
	catch-all-but-alphabetical rule.

2012-10-04  Theophile Ranquet  <theophile.ranquet@gmail.com>

scan-skel: recognize the @directives directly in scanner
	* src/scan-skel.l (at_directive, at_init): New.
	(at_ptr): New, function pointer used to call the right at_directive
	function (at_basename, etc.).
	(outname): Rename as...
	(out_name): this, for consistency with out_lineno.

2012-10-04  Theophile Ranquet  <theophile.ranquet@gmail.com>

scan-skel: split @directive functions
	* src/scan-skel.l (at_directive_perform): Split as...
	(at_basename, at_complain, at_output): these.

2012-10-04  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: support indented context info in m4 macros
	* TODO: Address the issue, so remove it.
	* data/bison.m4: Use b4_error with [[note]] rather than a complain_at
	for context information.
	* src/complain.c (complain_args): Take an additional argument, an
	indentation pointer, to allow the dispatching of context information.
	* src/complain.h (complain_args): Adjust prototype.
	* src/scan-skel.l (at_directive_perform): Recognize the new @note mark.
	* tests/input.at: Adjust.

2012-10-04  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: factor b4_error @directives
	Instead of @complain, @warn, and @fatal, use a unique @complain
	directive. This directive's first argument is "complain", "warn", etc.

* data/bison.m4 (m4_error): Here.
	* src/scan-skel.l (at_directive_perform): Adjust.
	(flag): Replace the switch by safer and more explicit if branches.

2012-10-04  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: pointerize complain_at_indent
	* src/complain.c (complain_at_indent): Rename as...
	(complaint_indent): This, and take the location as a pointer.
	* src/complain.h, src/muscle-tab.c, src/reader.c, src/scan-code.l,
	src/symtab.c: Adjust.

2012-10-04  Akim Demaille  <akim@lrde.epita.fr>

maint: word changes
	* README-hacking (Typical errors): Improve wording.

2012-10-04  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: fix test suite portability
	Reported by Rob Vermaas' Hydra build farm on x86_64-darwin 10.2.0 with
	G++ 4.6.3.

2012-10-03  Theophile Ranquet  <theophile.ranquet@gmail.com>

maint: fix an erroneous include
	This fixes test 130 (Several parsers).

* data/location.cc: Include <iostream> rather than <iosfwd> since
	we really need << on strings for instance.
	* NEWS: Document this.

2012-10-03  Akim Demaille  <akim@lrde.epita.fr>

tests: check that headers are self contained
	Reported by Alexandre Duret-Lutz.

* tests/headers.at (Several parsers): here.

2012-10-03  Akim Demaille  <akim@lrde.epita.fr>

doc: add missing documentation for --report
	* doc/bison.texi (Bison Options): Document --report's "solved", "all",
	and "none".

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

build: use gnulib's non-recursive-gnulib-prefix-hack
	Suggested by Jim Meyering.

* etc/prefix-gnulib-mk: Remove, as it is now provided by...
	* bootstrap.conf (modules): the non-recursive-gnulib-prefix-hack module.
	* build-aux/.gitignore, configure.ac, m4/.gitignore: Adjust.

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

warnings: simplify the m4 interface
	* data/bison.m4 (error_at): Replace...
	(error): this.
	(b4_warn, b4_complain, b4_fatal): Bounce to their _at equivalent,
	with empty location.
	* src/scan-skel.l (at_directive_perform): Simplify accordingly.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

warnings: separate flags_argmatch
	This function is now a mere iterator that calls flag_argmatch,
	a new function, that matches a single option parameter.

* src/getargs.c (flag_argmatch): New, taken from...
	(flags_argmatch): Here.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

warnings: refactoring
	The code here was too confusing, this seems more natural.

* src/complain.c (error_message): Move the indentation check and the category
	output to complains. Also, no longer take a 'warnings' argument.
	(complains): Factor calls to error_message.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

formatting changes
	* src/complain.c: Here.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

warnings: organize variadic complaints call
	Move the dispatch of variadic complains to complain.c, rather than do
	it in a scanner.

* src/complain.h, src/complain.c (complain_args): New.
	* src/scan-skel.l (at_directive_perform): Use it.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

warnings: fusion of complain and complain_at
	These functions are very similar, and keeping them seperate makes
	future improvements difficult, so merge them.

This impacts 89 calls.

* src/bootstrap.conf: Adjust.
	* src/complain.c (complain, complain_at): Merge into...
	(complain): this.
	(complain_args): Adjust.
	* src/complain.h, src/conflicts.c, src/files.c, src/getargs.c,
	* src/gram.c, src/location.c, src/muscle-tab.c, src/parse-gram.y,
	* src/reader.c, src/reduce.c, src/scan-code.l, src/scan-gram.l,
	* src/scan-skel.l, src/symlist.c, src/symtab.c:
	Adjust.

2012-10-01  Theophile Ranquet  <theophile.ranquet@gmail.com>

warnings: remove spurious suffixes on context
	Rectify a bug that introduced suffixes out of place.

* src/complainc.c (complains): Handle all three special warning bits.
	* src/scan-code.l (show_sub_message): Remove useless argument.
	* tests/named-refs.at: Adjust.

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  headers: move CPP guards into YY_*_INCLUDED to avoid collisions
	  minor changes.

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  gnulib: update
	  errors: indent "user token number redeclaration" context

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

headers: move CPP guards into YY_*_INCLUDED to avoid collisions
	See <http://lists.gnu.org/archive/html/bug-bison/2012-09/msg00016.html>.

* data/c.m4 (b4_cpp_guard): Prepend YY_ and append _INCLUDED.
	* tests/headers.at: Adjust.
	* NEWS, doc/bison.texi: Document.

2012-10-01  Akim Demaille  <akim@lrde.epita.fr>

minor changes.
	* NEWS: Word changes.
	* doc/bison.texi: Spell check.
	Fix minor issues.
	* tests/headers.at: Comment and formatting changes.

2012-09-28  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-09-28  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: indent "user token number redeclaration" context
	This is the continuation of the work on the readability of errors
	context.

* src/symtab.c (user_token_number_redeclaration): Use
	complain_at_indent to output with increased indentation level.
	* tests/input:at: Apply this change.

2012-09-27  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: don't display "warnings treated as errors"
	This line doesn't add any meaningful information anymore, the appended
	[-Werror=CATEGORY] is enough.  It is actually more insightful, as it
	allows to distinguish warnings treated as errors from those that
	aren't.  This line is also removed by gcc 4.8.

* src/complain.c (set_warnings_issued): The only action left was
	checking if the error bit corresponding to the warning issued was set,
	and that function was only called once. Therefore, remove it, and do
	its job directly in the caller...
	(complains): here.
	* src/complains.h: Adjust.
	* tests/input.at: Adjust.
	* NEWS: Document this change.

2012-09-27  Akim Demaille  <akim@lrde.epita.fr>

errors: change output, and improve -y coherence
	The prefix of warnings treated as errors is now "error: ". Also, their
	suffix now reflects the changes in the Werror option format.

An output for -Werror=other used to be:
	  bison: warnings being treated as errors
	  input.y:1.1: warning: stray ',' treated as white space [-Wother]

It is now:
	  bison: warnings being treated as errors
	  input.y:1.1: error: stray ',' treated as white space [-Werror=other]

The line "warnings being treated as errors" no longer adds any info,
	it will be removed in a forthcoming change.

* NEWS: Add entry "Enhancement of the -Werror"
	* doc/bison.texi: Move the warnings-as-error to a new bullet.
	* src/complain.c (complains): Refactor, change the prefix of warnings
	that are treated as errors.
	(warnings_print_categories): Support for [-Werror=CATEGORY] display
	* src/getargc.c (getargs): -y implies -Werror=yacc
	* tests/input.at: Update expected --yacc output for coherence.

2012-09-27  Theophile Ranquet  <theophile.ranquet@gmail.com>

errors: introduce the -Werror=CATEGORY option
	This new option is a lot more flexible than the previous one. Its
	details will be discussed in the NEWS and info file, in a forthcoming
	change.

If no category is specified (ie: used as simply "-Werror"), the
	functionality is the same as before.

* src/complain.c (errors_flag): New variable.
	(set_warning_issued): Accept warning categories as an argument.
	* src/complain.h (Wall): Better definition.
	* src/getargs.c (flags_argmatch): Support for the new format.
	(usage): Update -Werror to -Werror[=CATEGORY] format.

2012-09-26  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* maint:
	  warnings: introduce -Wdeprecated in the usage info
	  errors: prefix the output with "error: "
	  errors: indent "invalid value for %define" context
	  errors: indent "%define var" redefinition context
	  errors: indent "symbol redeclaration" context
	  errors: indent "result type clash" error context

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

warnings: introduce -Wdeprecated in the usage info
	The deprecated warning, introduced some time ago, was not displayed in
	the usage message. This patch addresses the issue.

* src/getargs.c (usage): Insert here.

2012-09-26  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-09-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  regen
	  yacc: fix handling of CPP guards when no header is generated
	  gnulib: update

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: prefix the output with "error: "
	This improves readability. This is also what gcc does.

* NEWS: Document this change.
	* src/complain.c (complain_at): Prefix all errors with "error: ".
	(complain_at_indent, warn_at_indent): Do not prefix the context
	information of errors, which are basically just indented errors.
	* tests/conflicts.at, tests/glr-regression.at, tests/input.at,
	tests/named-refs.at, tests/output.at, tests/push.at,
	tests/regression.at, tests/skeletons.at: Apply this change.

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: indent "invalid value for %define" context
	This is the continuation of the work on the readability of errors
	    context.

For example, what used to be:
	  input.y:1.9-29: invalid value for %define variable 'foo' : 'bar'
	  input.y:1.9-29: accepted value: 'most'

is now:
	  input.y:1.9-29: invalid value for %define variable 'foo' : 'bar'
	  input.y:1.9-29:     accepted value: 'most'

* src/muscle-tab.c (muscle_percent_define_check_values): Use
	complain_at_indent to output with increased indentation level.
	* tests/input:at: Apply this change.

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: indent "%define var" redefinition context
	This is the continuation of the work on the readability of errors
	context.

For example, what used to be:
	  input.y:2.9-11: %define variable 'var' redefined
	  input.y:1.9-11: previous definition

is now:
	  input.y:2.9-11: %define variable 'var' redefined
	  input.y:1.9-11:     previous definition

* src/muscle-tab.c (muscle_percent_define_insert): Use
	complain_at_indent to output with increased indentation level.
	* tests/input.at: Apply this change.

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: indent "symbol redeclaration" context
	This is the continuation of the work on the readability of errors
	context.

For example, what used to be:
	  input.y:5.10-24: %printer redeclaration for <field2>
	  input.y:3.11-25: previous declaration

is now:
	  input.y:5.10-24: %printer redeclaration for <field2>
	  input.y:3.11-25:     previous declaration

* NEWS: Document this change.
	* src/symtab.c (symbol_redeclaration, semantic_type_redeclaration,
	user_token_number_redeclaration, default_tagged_destructor_set,
	default_tagless_destructor_set, default_tagged_printer_set,
	default_tagless_printer_set): Use complain_at_indent to
	output with increased indentation level.
	* tests/input.at: Apply this change.

2012-09-26  Theophile Ranquet  <ranquet@lrde.epita.fr>

errors: indent "result type clash" error context
	This used to be the format of the error report:

input.y:6.5-10: result type clash on merge function 'merge': [...]
	  input.y:2.4-9: previous declaration

In order to distinguish the actual error from the context provided, we
	rather this new output:

input.y:6.5-10: result type clash on merge function 'merge': [...]
	  input.y:2.4-9:     previous declaration

Another patch will introduce an "error: " prefix to all non-indented
	lines, giving yet better readability to the reports.

* src/complain.h (SUB_INDENT): Move to here.
	* src/reader.c (record_merge_function_type): Use complain_at_indent to
	output with increased indentation level.
	* src/scan-code.l (SUB_INDENT): Remove from here.
	* tests/glr-regression.at: Apply this change.

2012-09-25  Akim Demaille  <akim@lrde.epita.fr>

warnings: use the regular interface for s/r and r/r conflicts
	The current routines used to display s/r and r/r conflicts are both
	inconvenient from the programmer point of view (they do not use the
	warning infrastructure) and for the user (the messages are rather
	terse, not necessarily pleasant to read, and because they don't use
	the same routines, they look different).

It was due to the belief (dating back to the initial checked-in
	version of Bison) that, at some point, POSIX Yacc mandated the format
	for these messages.  Today, the Open Group's manual page for Yacc,
	<http://pubs.opengroup.org/onlinepubs/009695399/utilities/yacc.html>,
	explicitly states that the format of these messages is unspecified.
	See commit be7280480c175bed203883f524c7dcd6cf37c13d and
	<http://lists.gnu.org/archive/html/bison-patches/2002-12/msg00027.html>.

For a discussion on the chosen warning format, see
	http://lists.gnu.org/archive/html/bison-patches/2012-09/msg00039.html

In an effort to factor the handling of errors and warnings, use the
	Bison warning routines to report these messages.

* src/conflicts.c (conflicts_print): Rewrite with clearer sections
	about S/R and then R/R conflicts.
	(conflict_report): Remove, inlined in its sole
	caller...
	(conflicts_output): here.
	* tests/conflicts.at, tests/existing.at, tests/glr-regression.at,
	* tests/reduce.at, tests/regression.at: Adjust the expected results.
	* NEWS: Update.

2012-09-25  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-09-25  Akim Demaille  <akim@lrde.epita.fr>

yacc: fix handling of CPP guards when no header is generated
	When no header was to be generated, Bison would issue:

/* In a future release of Bison, this section will be replaced
	     by #include "".  */
	  #ifndef YY_
	  # define YY_

It now properly generates nothing.

* data/c.m4 (b4_cpp_guard_open, b4_cpp_guard_close): Issue nothing when
	the file name is empty.
	* data/yacc.c: Do not generate the above comment when there is no header
	to generate.
	* NEWS: Update.

2012-09-25  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

conflicts: refactor the counting routines
	* src/conflicts.c (count_sr_conflicts, count_rr_conflicts): Rename as...
	(count_sr_conflicts, count_rr_conflicts): these.
	Use size_t for counts.
	(count_sr_conflicts, count_rr_conflicts): New.
	Use them.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

%expect-rr is for GLR only
	* src/conflicts.c (conflicts_print): Complain about %expect-rr if not
	in GLR mode, regardless of the number of reduce/reduce conflicts.
	* tests/conflicts.at (%expect-rr non GLR): New test.
	* NEWS: Update.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

TODO: lalr1.cc master vs maint
	* TODO: here.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

c++: coding style fixes
	* data/lalr1.cc, tests/c++.at: Formatting changes.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

Revert "introduced a GCC-like -Werror=type"
	This reverts commit 981c53e257f1974854edc4f6ad0e88c7f18e2bea.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

Revert "made previous commit less hairy"
	This reverts commit fd01e1d05ea3e627033d148b5400b99a18ac7ba3.

2012-09-21  Akim Demaille  <akim@lrde.epita.fr>

Revert "new Werror report format fixed in a test"
	This reverts commit 41511178a71ebaf81bde7ffc682c575537af45cb.

2012-09-21  Theophile Ranquet  <ranquet@lrde.epita.fr>

new Werror report format fixed in a test
	* tests/input.at : replaced [-Wyacc] with [-Werror=yacc]

todo: fix the other failed test of the suite, tests/conflicts.at:1554

2012-09-21  Theophile Ranquet  <ranquet@lrde.epita.fr>

made previous commit less hairy
	* src/getargs.c : here

2012-09-20  Theophile Ranquet  <ranquet@lrde.epita.fr>

introduced a GCC-like -Werror=type
	* src/complain.h : errors_flag variable
	* src/complain.c : actual stuff happens here
	* src/conflits.c : differentiated SR and RR conflicts
	* src/getargs.c : flags_argmatch recognizes the new -Werror format

2012-09-04  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-09-04  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: remove useless file
	  update files to ignore
	  remove useless include
	  use locale-indep. c_is* functions for parsing, not isspace, isprint etc
	  gnulib: update
	  --help: include a place to report translation issues
	  tests: style changes
	  tests: fix push-pull test
	  yacc.c: style changes

2012-09-04  Akim Demaille  <akim@lrde.epita.fr>

maint: remove useless file
	* externals/bootstrap.cfg: Remove.
	This file was used by a specific build system.
	It was added to the master repository by accident.

2012-09-04  Akim Demaille  <akim@lrde.epita.fr>

update files to ignore
	* doc/.gitignore: Don't ignore split info files as we don't split our
	info file.
	See <http://lists.gnu.org/archive/html/bug-bison/2012-08/msg00006.html>.

2012-09-04  Akim Demaille  <akim@lrde.epita.fr>

remove useless include
	* src/system.h: Don't include sys/types.h.
	Reported by Eric Blake,
	<http://lists.gnu.org/archive/html/bug-bison/2012-09/msg00002.html>.
	(FUNCTION_PRINT): Remove, unused.

2012-09-03  Jim Meyering  <meyering@redhat.com>

use locale-indep. c_is* functions for parsing, not isspace, isprint etc
	* src/parse-gram.y: Include "c-ctype.h".
	(add_param): Parse with c_isspace, not isspace.
	* src/parse-gram.c: Likewise.
	* src/scan-gram.l: Include c-ctype.h, not ctype.h.
	(SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER): Use c_isspace and c_isprint,
	not ctype.h's locale-dependent functions.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

--help: include a place to report translation issues
	http://lists.gnu.org/archive/html/bug-bison/2012-08/msg00007.html
	shows that it is useful to help users report translation issues.
	While at it, include other informative bits that the coreutils shows.

* src/getargs.c (usage): Report more URLs where the user can
	refer to.
	Mostly copied/pasted from coreutils' emit_ancillary_info function.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

news: style changes
	* NEWS: Minor improvements.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

use -Wdeprecated for obsolete %define variable names
	* src/muscle-tab.c (muscle_percent_variable_update): Here.
	* tests/input.at (%define backward compatibility): Update expectations.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

introduce -Wdeprecated
	GCC seems to be using "deprecated" consistently over "obsoleted", so
	use -Wdeprecated rather than -Wobsolete.

* src/complain.h (warnings): Add Wdeprecated.
	* src/complain.c (warnings_print_categories): Adjust.
	* src/getargs.c: Likewise.
	* doc/bison.texi: Document it.

* src/scan-code.l: Use this category for the trailing ';' support.
	* tests/actions.at: Adjust expected output.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

undefined but unused is a warning
	* src/symtab.c (symbol_check_defined): Undeclared symbols are only
	a warning.
	* tests/input.at (Undeclared symbols used for a printer or destructor):
	Rename as...
	(Undefined symbols): this, and check this case.
	* NEWS: Doc it.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: %defines is no longer mandatory
	* data/glr.cc: No longer require %defines.
	When it is not given, define the position and location classes instead
	of including their headers.
	(b4_shared_declarations): Use the original parse-params.
	* data/glr.c (b4_shared_declarations): Define only if undefined.
	* tests/actions.at, tests/calc.at: No longer force the use of %defines
	for glr.cc.
	* NEWS: Doc it.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

todo: check push parsers

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

style: remove useless C++ provisio
	* src/complain.h: here.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

parser: style changes
	* src/parse-gram.y: Avoid deprecated directives.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

doc: address a fixme
	* doc/bison.texi (Calc++ Parser): Add a cross-reference.

2012-09-03  Akim Demaille  <akim@lrde.epita.fr>

style changes
	* data/glr.cc, tests/actions.at: Fix comments.
	* src/symtab.h, src/symtab.c: Fix indentation/comments.
	* src/symlist.c: Fix indentation.

2012-08-31  Akim Demaille  <akim@lrde.epita.fr>

tests: style changes
	* tests/torture.at (AT_DATA_STACK_TORTURE): M4 style changes to
	improve readability.
	Fix an assertion which, because of a <= instead of ==, did not check
	new_status as visibly meant.
	(get_args): New.

2012-08-31  Akim Demaille  <akim@lrde.epita.fr>

tests: fix push-pull test
	* tests/torture.at: %push-pull-parser is no longer supported.

2012-08-31  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: style changes
	* data/yacc.c: (yytoken): Define with initial value.

2012-08-12  Akim Demaille  <akim@lrde.epita.fr>

refactoring: define variables with a value
	* src/muscle-tab.c: Where possible, fuse definition and initial assignment.

2012-08-12  Akim Demaille  <akim@lrde.epita.fr>

minor refactoring: shorten variable names
	* src/scan-skel.l (at_directive_argc, at_directive_argv)
	(AT_DIRECTIVE_ARGC_MAX): Rename as...
	(argc, argv, ARGC_MAX): these, as there is no possible confusion.
	(flags): New.
	(QPUTS): Remove, inline its only use.

2012-08-12  Akim Demaille  <akim@lrde.epita.fr>

obstacks: simplifications
	* src/system.h (obstack_finish0): New.
	Use it to simplify several uses.
	* src/muscle-tab.h (MUSCLE_INSERTF): New.
	* src/muscle-tab.c: Use obstack_printf where simpler.

2012-08-12  Akim Demaille  <akim@lrde.epita.fr>

minor refactoring in user code scanning
	* src/scan-code.l (show_sub_message, show_sub_messages): Instead of a
	Boolean, take a "warnings" argument.
	Avoid storing printf-like format strings in a variable, so that GCC
	can check them.

2012-08-12  Akim Demaille  <akim@lrde.epita.fr>

minor refactoring in user code scanning
	* src/scan-code.l (show_sub_message): New, extracted from...
	(show_sub_messages): here.

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

tests: strengthen the trailing spaces check
	* tests/calc.at: here.
	* data/glr.c: Fix accordingly.

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* origin/maint:
	  maint: post-release administrivia
	  version 2.6.2
	  NEWS: update.
	  yacc: remove trailing end of line at end of file
	  thanks: fix a contributor name
	  gnulib: update
	  tests: synch line -> syncline, for consistency
	  tests: synclines: style changes
	  tests: synclines: fix perl invocation
	  regen
	  c++: trailing end-of-lines in %parse-param
	  tests: simplify

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

remove support for lint
	Basically revert commit 12ce2df60d16961eaa03a5aa009eeaa645e4e1cb.
	http://lists.gnu.org/archive/html/bison-patches/2012-08/msg00004.html

* data/c.m4, data/glr.c, data/yacc.c (YYID): Remove.
	No longer use ARGSUSED.
	* src/getargs.c: Restore simpler inclusion of getopt.h (anyway, since
	then we now use gnulib which certainly protects us from such issues).

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

skeletons: renamings after knr removal
	* data/c.m4 (b4_yydestruct_generate, b4_yy_symbol_print_generate):
	Rename as...
	(b4_yydestruct_define, b4_yy_symbol_print_define): these, for consistency.
	* data/glr.c, data/glr.cc, data/yacc.c: Adjust.

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-08-03  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.2
	* NEWS: Record release date.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

c++: fix a comment
	* data/c++.m4: Be sure to attach a ';' to its declaration, otherwise
	it appears in the preceding comment.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

skeletons: simplify after knr removal
	* data/c.m4 (b4_yydestruct_generate, b4_yy_symbol_print_generate):
	They no longer need an argument, it has a single possible value.
	* data/glr.c, data/yacc.c: Adjust.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

skeletons: renamings after knr removal
	* data/c.m4 (b4_c_comment_, b4_c_args, b4_c_function_def)
	(b4_c_function_decl, b4_c_formals, b4_c_call, b4_c_arg): Rename as...
	(b4_comment, b4_args, b4_function_define, b4_function_declare,
	b4_formals, b4_function_call, b4_arg): these.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: Adjust.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

skeletons: b4_args -> b4_join to prepare forthcoming changes
	* data/bison.m4 (b4_args, _b4_args): Rename as...
	(b4_join, _b4_join): these.
	* data/c++.m4, data/lalr1.cc, data/variant.hh: Adjust.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

YYPARSE_PARAM: drop support
	* data/yacc.c: No longer support it.
	* doc/bison.texi, tests/headers.at: Adjust.
	* NEWS: Document.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

skeletons: remove K&R C support
	* data/c.m4 (b4_c_modern, b4_c_knr_formal_names, b4_c_knr_formal_decls)
	(b4_c_knr_formal_decl, b4_c_formal_names, b4_c_formal_decls)
	(b4_c_formal_decl): Remove.
	(b4_c_ansi_formal_names, b4_c_ansi_formal_decls, b4_c_ansi_formal_decl):
	Rename as...
	(b4_c_formal_names, b4_c_formal_decls, b4_c_formal_decl):
	these.
	* data/glr.c, data/glr.cc, data/yacc.c: Adjust.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

NEWS: update.
	* NEWS: Catch up with the other changes from 2.6.1.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

yacc: remove trailing end of line at end of file
	There are still spurious spaces at the end of some lines.  But this is
	addressed in the master branch, and I am reluctant to try to backport
	this.

* data/yacc.c, data/glr.c, data/lalr1.cc, data/glr.cc: here.
	* tests/calc.at (AT_CHECK_SPACES): New.
	Use it.
	Be sure not to introduce trailing empty lines in the *.y files.
	* NEWS: Doc it.
	* cfg.mk (syntax-check): Remove the exception.

2012-08-02  Akim Demaille  <akim@lrde.epita.fr>

thanks: fix a contributor name
	* THANKS: On his request.

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

tests: synch line -> syncline, for consistency
	* tests/synclines.at: Do it, as "syncline" is used consistently
	everywhere else in Bison.

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

tests: synclines: style changes
	* tests/synclines.at (AT_TEST_SYNCLINE): Rename as...
	(AT_TEST): this.
	Use pushdef/popdef.
	Formatting changes.
	Use '+' instead of '*' where appropriate.

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

tests: synclines: fix perl invocation
	Reported by Summum Bonum.

* tests/synclines.at: Fix Perl invocation: its -f is not like sed's.

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

c++: trailing end-of-lines in %parse-param
	* src/parse-gram.y (add_param): No only skip ' ' and '\t', skip all
	leading and trailing spaces.
	* tests/regression.at (Lex and parse params): Check it.
	* NEWS: Document it.

2012-08-01  Akim Demaille  <akim@lrde.epita.fr>

tests: simplify
	* tests/regression.at: Remove useless compilations: AT_FULL_COMPILE
	includes the compilation by bison.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

todo: more items
	* TODO: $ in the epilogue, and obstack_copy.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

Merge branch 'maint'
	* maint:
	  use obstack_printf
	  scanner: restore a missing start condition
	  gnulib: update
	  maint: post-release administrivia
	  version 2.6.1
	  gnulib: update
	  maint: fix some syntax-check issues
	  tests: do not depend on __cplusplus to decide for C++ or C output

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

tests: comment changes
	* tests/actions.at, tests/input.at: here.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

tests: really check the set of generated files
	* tests/output.at (AT_CHECK_OUTPUT): It used to check that the
	expected files are indeed generated, but it did not check that
	there are no additional ones.
	Do that, and adjust expectations (in particular alphabetical order).

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: do not create stack.hh without %defines
	* data/stack.hh (b4_stack_define): New.
	* data/lalr1.cc: Use it when %defines is not passed.
	* tests/output.at: Adjust expected output.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: location.hh and position.hh are not generated without %defines
	* data/location.cc (b4_position_define, b4_location_define): New.
	(location.hh, position.hh): Generate only if %defines.
	* data/lalr1.cc: therefore, define these classes when locations are
	needed, but headers are not generated.
	* tests/output.at: Check that these files are not generated.
	* NEWS: Document.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: no longer require %defines.
	* data/lalr1.cc: Generate the parser header only when %defines is
	passed.
	* tests/calc.at: Check it.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

skeletons: style changes
	* data/glr.c, data/lalr1.cc: Use more consistent comments,
	and YY_NULL declaration.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

glr.cc, lalr1.cc: define b4_shared_declarations
	* data/glr.cc, data/lalr1.cc: here.
	The name is no longer right, but at least it is consistent with
	the other skeletons.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: no longer require location support
	* data/glr.cc: Use b4_locations_if where appropriate.
	* data/lalr1.cc: M4 quotation changes to highlight code duplication
	with glr.cc.
	* tests/calc.at: Check glr.cc with and without %location.
	While at it, fuse multiple %parse-params into one.
	* tests/actions.at: Simplify.
	* NEWS: Doc this.
	Some other wording changes.

2012-07-31  Akim Demaille  <akim@lrde.epita.fr>

use obstack_printf
	This is not just nicer, it is also much safer, since we were
	using sprintf...

* bootstrap.conf: Require it.
	* src/system.h (obstack_fgrow1, obstack_fgrow2, obstack_fgrow3)
	(obstack_fgrow4): Remove.
	Adjust dependencies.

2012-07-30  Akim Demaille  <akim@lrde.epita.fr>

scanner: restore a missing start condition
	$ flex src/scan-skel.l
	src/scan-skel.l:145: multiple <<EOF>> rules for start condition SC_AT_DIRECTIVE_ARGS
	src/scan-skel.l:145: multiple <<EOF>> rules for start condition SC_AT_DIRECTIVE_SKIP_WS
	This is warning, and it seems there are no means to make it an error.

* src/scan-skel.l: Restore the start-condition INITIAL for an <<EOF>>
	clause.

2012-07-30  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-07-30  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-07-30  Akim Demaille  <akim@lrde.epita.fr>

version 2.6.1
	* NEWS: Record release date.

2012-07-30  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

maint: fix some syntax-check issues
	* cfg.mk: Nuke the following warnings which are confused by our
	text reports (that state that the error token is number 256).
	  prohibit_magic_number_exit
	  ../../doc/bison.texi:8170:error (256)
	  ../../tests/conflicts.at:570:error (256)
	  ../../tests/conflicts.at:673:error (256)
	  ../../tests/conflicts.at:811:error (256)
	  ../../tests/conflicts.at:1154:error (256)
	  ../../tests/regression.at:281:error (256)
	  ../../tests/regression.at:582:error (256)
	  maint.mk: use EXIT_* values rather than magic number

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

tests: do not depend on __cplusplus to decide for C++ or C output
	Since we do support compiling C code with a C++ compiler.

* tests/actions.at (Qualified $$ in actions): Use AT_SKEL_CC_IF.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint: (29 commits)
	  regen
	  synclines: remove spurious empty line
	  also support $<foo>$ in the %initial-action
	  skeletons: b4_dollar_pushdef and popdef to simpify complex definitions
	  regen
	  printer/destructor: translate only once
	  factor the handling of m4 escaping
	  news: schedule the removal of the ";" hack
	  style changes in the scanners
	  regen
	  support $<tag>$ in printers and destructors
	  scan-code: factor the handling of the type in $<TYPE>$
	  muscles: fix another occurrence of unescaped type name
	  glr.cc: fix the handling of yydebug
	  gnulib: update
	  formatting changes
	  tests: fix an assertion
	  tests: adjust to GCC 4.8, which displays caret errors
	  be sure to properly escape type names
	  obstack_quote: escape and quote for M4
	  muscles: shuffle responsabilities
	  muscles: make private functions static
	  muscles: rename private functions/macros
	  obstack_escape: escape M4 characters
	  remove dead macro
	  maint: style changes
	  doc: avoid problems with case insensitive file systems
	  configure: fix botched quoting
	  news: fix typo.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

synclines: remove spurious empty line
	* data/bison.m4 (b4_syncline): Do not start with an empty line.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

also support $<foo>$ in the %initial-action
	scan-code.l is already passing argument to b4_dollar_dollar for the
	initial acton, but its definition (of b4_dollar_dollar) does not use
	this argument.

Generalize this definition, and use it for the %initial-action too.

* data/c.m4 (b4_dollar_dollar_, b4_dollar_pushdef, b4_dollar_popdef):
	Instead of expecting a pointer, require a value, and use ".".
	Since they are now generic enough, move to...
	* data/c-like.m4: this new file.
	* data/c.m4, data/java.m4: Load it.
	* data/glr.c, data/lalr1.cc, data/lalr1.java, data/yacc.c: Use
	b4_dollar_pushdef for the %initial-action.
	* tests/actions.at: Check that.
	* data/Makefile.am: Adjust.
	* NEWS, doc/bison.texi: Document.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

skeletons: b4_dollar_pushdef and popdef to simpify complex definitions
	M4 is really making it uselessly hard to define macros that define
	macros.
	* data/c.m4 (b4_dollar_pushdef, b4_dollar_popdef): New.
	Use it.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

printer/destructor: translate only once
	Currently "%printer {...} a b c d e f" translates the {...} six times.
	Not only is this bad for time and space, it also issues six times the
	same warnings.

* src/symlist.h, src/symlist.c (symbol_list_destructor_set)
	(symbol_list_printer_set): Take the action as code_props instead of
	const char *.
	* src/parse-gram.y: Translate these actions here.
	* src/scan-code.h: Comment change.
	* tests/input.at: Check that warnings are issued only once.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

factor the handling of m4 escaping
	The conversion from @ to @@ and so forth is coded is too many
	different places.  Factor, a bit.

* src/scan-code.l: Instead of duplicating the logic of obstack_escape,
	use it.
	It sure is less efficient, but the cost is negligible.
	This allows to factor rules that are alike.
	And to factor some start-condition clauses.
	* tests/input.at (Stray $ or @): New.
	* NEWS: Document it.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

news: schedule the removal of the ";" hack
	scan-code.l is significantly more complex because of this.

* NEWS: Doc it.

2012-07-27  Akim Demaille  <akim@lrde.epita.fr>

style changes in the scanners
	* src/scan-code.l, src/scan-skel.l: Use a more traditional indentation
	style for start-conditions.
	Prefer "continue" to a comment, for empty actions.
	Strip useless {}.
	Remove useless start-condition clauses.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

support $<tag>$ in printers and destructors
	* src/scan-code.l (SC_SYMBOL_ACTION): Accept $<tag>$, not just $$.
	* data/c.m4 (b4_dollar_dollar_): New.
	(b4_symbol_actions): Let b4_dollar_dollar use b4_dollar_dollar_.
	* NEWS, doc/bison.texi: Document it.
	* tests/actions.at: Check this for C and C++.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

scan-code: factor the handling of the type in $<TYPE>$
	* src/scan-code.l (fetch_type_name): New.
	(handle_action_dollar): Use it.
	(gt_ptr): Remove, useless.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

muscles: fix another occurrence of unescaped type name
	* src/output.c (quoted_output): Split into...
	(quoted_output, string_output): these.
	Use the former when outputting a type_name.
	* tests/input.at: Check this case.
	* src/symtab.h: Comment changes.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: fix the handling of yydebug
	* data/glr.cc (yydebug_): Remove, unused.
	(set_debug_level, debug_level): Work on yydebug instead.
	* doc/bison.texi, NEWS: Document this.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

formatting changes
	* src/symtab.h: here.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

tests: fix an assertion
	* tests/local.at (AT_YYLEX_DEFINE): Be sure to check the array
	against its length, not its size in bytes.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

tests: adjust to GCC 4.8, which displays caret errors
	With GCC 4.8, the tests on synclines are skipped.  Transform

input.y:1:2: error: #error "1"
	   #error "1"
	    ^

into

input.y:1: #error "1"

* tests/synclines.at (AT_SYNCLINES_COMPILE): Do it, using Perl instead of
	sed.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

be sure to properly escape type names
	* src/scan-code.l: Use obstack_quote when passing type_name to m4.
	* tests/input.at (Code injection): New.
	* NEWS: Document it.
	Thanks to Paul Eggert for the wording.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

obstack_quote: escape and quote for M4
	* src/system.h (obstack_quote): New.
	* src/muscle-tab.c: Use it instead of obstack_escape where applicable.
	* src/scan-code.l: Since obstack_quote supports NULL, leave type_name
	as NULL instead of defaulting to "".

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

muscles: shuffle responsabilities
	* src/muscle-tab.c (muscle_boundary_grow): Be in charge of quotation,
	instead of leaving this to the caller.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

muscles: make private functions static
	* src/muscle-tab.h, src/muscle-tab.c (muscle_boundary_grow)
	(muscle_location_grow): Now static.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

muscles: rename private functions/macros
	* src/muscle-tab.c (MUSCLE_COMMON_DECODE, muscle_string_decode)
	(muscle_location_decode): Not related to muscles, rename as...
	(COMMON_DECODE, string_decode, location_decode): these.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

obstack_escape: escape M4 characters
	* src/muscle-tab.h (MUSCLE_OBSTACK_SGROW): This is not related to
	muscles, so move to, and rename as...
	* src/system.h (obstack_escape): this.
	Adjust dependencies.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

remove dead macro
	* src/system.h (DEFAULT_TMPDIR): Remove, unused.

2012-07-26  Akim Demaille  <akim@lrde.epita.fr>

maint: style changes
	* src/scan-code.l: Remove useless braces.
	Formatting changes.
	Prefer NULL to 0.
	* src/muscle-tab.c, src/system.h: Formatting changes.

2012-07-24  Akim Demaille  <akim@lrde.epita.fr>

doc: avoid problems with case insensitive file systems
	makeinfo --html generates index.html, and the node "Index" will result
	in Index.html.  On case insensitive file systems, such as on Mac OS X
	by default, this results in a single, invalid, file (Texinfo 4.13).
	See http://lists.gnu.org/archive/html/bug-texinfo/2012-07/msg00032.html

* doc/bison.texi (Index): Rename as...
	(Index of Terms): this.

2012-07-24  Stefano Lattarini  <stefano.lattarini@gmail.com>  (tiny change)

configure: fix botched quoting
	* configure.ac: In the AC_SUBST call on 'VALGRIND_PREBISON'.  Without
	this change, when running ./configure, I see:

...
	    checking for valgrind... valgrind
	    ./configure: line 35221: -q: command not found
	    checking for Java compiler... gcj -C -fsource=1.3 -ftarget=1.4
	    ...

2012-07-24  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-24  Akim Demaille  <akim@lrde.epita.fr>

yystype, yyltype: remove.
	* data/c.m4: here.
	* NEWS: Doc it.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

regen

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

YYFAIL: remove.
	* data/lalr1.java, data/yacc.c, src/scan-code.l: Remove YYFAIL support.
	* NEWS, TODO: Update.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

todo: update.
	* TODO: obsolete items.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

regen.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

space changes.
	* data/bison.m4 (b4_symbol_action): Remove spurious eol in the output.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

parser: fix %printer usage.
	* src/parse-gram.y: Instead of stderr, using yyo.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

parser: factor the handling of code_props
	* src/parse-gram.y: Now that %printer and %destructor are treated
	equally, let...
	(code_props_type): handle them.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

parser: factor handling of type tags
	* src/parse-gram.y: Now that <*> and <> are processed like regular
	tags, let...
	(tag): handle them.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

regen.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

simplify the handling of <> and <*>'s code_props.
	Currently they are treated in separated variables, contrary to other
	<TYPE> code_props.  This duplicates code (and messages for translators)
	uselessly, as demonstrated by the fact that thanks to this patch, now
	useless <*> and <> code_props are reported like the others.

* src/parse-gram.y (generic_symlist_item): Treat "<*>" and "<>" as regular
	type tags.
	* src/symlist.h, src/symlist.c (symbol_list_default_tagged_new)
	(symbol_list_default_tagless_new,SYMLIST_DEFAULT_TAGGED)
	(SYMLIST_DEFAULT_TAGLESS): Remove.
	* src/symtab.h, src/symtab.c (default_tagged_code_props)
	(default_tagless_code_props, default_tagged_code_props_set)
	(default_tagless_code_props_set): Remove.
	(symbol_code_props_get): Default to <*> or <>'s code_props.

* tests/actions.at: Complete expected errors: there are new warnings.
	* tests/input.at: Likewise.
	(Useless printers or destructors): Extend.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

allow modification on retrieved code_props.
	The logic to compute the %printer or %destructor to used (i.e., a
	code_props) is implemented twice: one, of course, in
	symbol_code_props_get, and another time in symbol_check_defined to
	record the fact that a code_props is used (so that we can reported
	unused ones).  Let the former use the latter.

I would probably use "mutable" in C++ and keep these guys const,
	but this is C.  And casting away constness triggers warnings.

* src/scan-code.h, src/scan-code.l (code_props_none): Is not const.
	* src/symtab.h, src/symtab.c (symbol_code_props_get): The symbol
	is not const.
	(symbol_check_defined): Use it.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

maint: regen.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

maint: fix bison's own header guards.
	Because I'm using a VPATH build with an absolute srcdir, I have
	GRAM__USERS_AKIM_SRC_GNU_BISON_SRC_PARSE_GRAM_H.  Before, I was using
	a relative srcdir, and had GRAM_______SRC_PARSE_GRAM_H (coming from
	../../).  Let it be GRAM_SRC_PARSE_GRAM_H.

* tests/bison.in: Do not depend on the value of $top_srcdir for
	Bison itself.
	If we were to use relative paths from .c to .y, we would not have
	this problem.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

maint: add missing const.
	* src/symtab.h, src/symtab.c (symbol_print): here.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

style changes.
	* src/parse-gram.y, src/symtab.c: Space changes.
	* src/symtab.h: Comment changes.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

autoconf: update.
	* submodules/autoconf: here.
	No significant changes for our use of m4sugar.m4.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

output: no longer use b4_tokens.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/lalr1.java, data/yacc.c:
	Since the previous commit, b4_tokens_define and the like no longer need
	b4_tokens.
	* src/output.c (token_definitions_output): Remove.

2012-07-22  Akim Demaille  <akim@lrde.epita.fr>

output: use the token list to define the yytokentype
	There are currently two systems used to pass information about tokens to
	m4: the original one, and another, which is used for instance for
	printers and destructors, variants etc.  Move to using only the latter.

* data/bison.m4 (b4_symbol_map, b4_token_visible_if)
	(b4_token_has_definition, b4_any_token_visible_if, b4_token_format): New.
	* data/c++.m4, data/c.m4, data/glr.c, data/java.m4: Adjust to use them.

2012-07-20  Akim Demaille  <akim@lrde.epita.fr>

tests: fix VPATH issue
	* examples/test: With an absolute VPATH build, "../" is incorrect.

2012-07-20  Akim Demaille  <akim@lrde.epita.fr>

news: fix typo.
	* NEWS: here.
	Reported by Ben Pfaff.

2012-07-19  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: update gnu-web-doc-update.
	  maint: post-release administrivia
	  version 2.6
	  maint: prepare for release 2.6
	  maint: post-release administrivia
	  version 2.5.91
	  maint: prepare NEWS.
	  maint: fix spaces.
	  tests: adjust to case where the C compiler is actually a C++ compiler
	  tests: fix dependencies
	  doc: fix Texinfo command
	  maint: Valgrind on OS X.
	  tests: be sure that backups are safe.
	  maint: dead comment.
	  tests: refactor for legibility.
	  tests: refactor the bison invocations.
	  maint: fix syntax-check ignore patterns.
	  gnulib: update
	  gnulib: update.
	  gnulib: update

2012-07-19  Akim Demaille  <akim@lrde.epita.fr>

maint: update gnu-web-doc-update.
	* gnulib: here.

2012-07-19  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-07-19  Akim Demaille  <akim@lrde.epita.fr>

version 2.6
	* NEWS: Record release date.

2012-07-19  Akim Demaille  <akim@lrde.epita.fr>

maint: prepare for release 2.6
	* NEWS: here.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

version 2.5.91
	* NEWS: Record release date.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

maint: prepare NEWS.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

maint: fix spaces.
	* build-aux/Makefile.am: here.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

tests: adjust to case where the C compiler is actually a C++ compiler
	* tests/atlocal.in (CC_IS_CXX): New.
	* tests/headers.at (Several parsers): Use it.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

tests: fix dependencies
	* tests/Makefile.am: we need atconfig and atlocal to be up to date
	when calling testsuite.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

doc: fix Texinfo command
	* doc/bison.texi: In parens, use @pxref.

2012-07-18  Akim Demaille  <akim@lrde.epita.fr>

maint: Valgrind on OS X.
	* configure.ac (VALGRIND_PREBISON): New.
	* tests/Makefile.am (maintainer-check-valgrind): Use it.
	* etc/darwin11.4.0.supp: New.
	* configure.ac, etc/Makefile.am: Use it.
	* configure.ac: Disable Valgrind on Mac OS X.
	* README-hacking: Explain why.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

tests: be sure that backups are safe.
	* tests/local.at (at_save_special_files): here.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

maint: dead comment.
	* etc/README: here.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

tests: refactor for legibility.
	* tests/local.at (AT_BISON_CHECK_WARNINGS, AT_BISON_CHECK_WARNINGS_):
	New.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

tests: refactor the bison invocations.
	* tests/local.at (m4_null_if, AT_BISON_CHECK_): New.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

maint: fix syntax-check ignore patterns.
	* cfg.mk: here.

2012-07-17  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update

2012-07-16  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.
	* gnulib: Update so that gitlog-to-changelog support --srcdir.
	* Makefile.am: Use it.

2012-07-10  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update
	* bootstrap, build-aux/.gitignore, gnulib, m4/.gitignore: update.

2012-07-06  Akim Demaille  <akim@lrde.epita.fr>

maint: minor fixes
	* NEWS: restore missing entry.
	* cfg.mk: Adjust to *.texinfo -> *.texi.
	* src/symtab.c: Spaces fixes.

2012-07-06  Akim Demaille  <akim@lrde.epita.fr>

tests: address g++-4.8 warnings.
	list.yy: In function 'yy::parser::symbol_type yylex()':
	list.yy:107:29: error: typedef 'token' locally defined but not used
	  [-Werror=unused-local-typedefs]
	   typedef yy::parser::token token;
	                             ^

* tests/c++.at (AT_CHECK_VARIANTS): here.

2012-07-06  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: update release instructions
	  maint: post-release administrivia
	  version 2.5.90
	  build: fix gen-ChangeLog call.
	  gnulib: update.
	  tests: fix SKIP_IF for Java.
	  api.prefix: incompatible with %name-prefix.
	  api.prefix: strengthen the tests and fix push-parsers.
	  skeletons: style changes.
	  NEWS: minor changes.
	  api.prefix: improve the documentation for YYDEBUG.
	  gnulib: update.

2012-07-06  Akim Demaille  <akim@lrde.epita.fr>

maint: update release instructions
	* README-hacking: here.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

version 2.5.90
	* NEWS: Record release date.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

build: fix gen-ChangeLog call.
	* Makefile.am: Be sure to catch errors, and fix option name

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.
	* gnulib/build-aux/do-release-commit-and-tag: Fix.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

tests: fix SKIP_IF for Java.
	* tests/local.at (AT_JAVA_COMPILE): here.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

api.prefix: incompatible with %name-prefix.
	* data/bison.m4: Make it incompatible.
	* tests/input.at: Check that it is.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

api.prefix: strengthen the tests and fix push-parsers.
	* tests/calc.at: Check api.prefix in addition to %name-prefix.
	* tests/headers.at: Check push parsers and pure interface.
	* tests/local.at: Use YYLTYPE renamed.
	* data/yacc.c (b4_declare_yyparse_push_): Handle api.prefix.
	* doc/bison.texi: Style changes.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

skeletons: style changes.
	* data/bison.m4: Define default values after having defined
	the support macros.
	Kill a dead comment.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

NEWS: minor changes.
	* NEWS: style changes.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

api.prefix: improve the documentation for YYDEBUG.
	* doc/bison.texi: Explain how api.prefix is applied to YYDEBUG.

2012-07-05  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.
	* bootstrap, gnulib: Update.
	* cfg.mk (syntax-check): Don't check "error" usage in bison.texi.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  tests: headers.at: strengthen.
	  glr.cc: do not override C++ definitions by C macros.
	  YYLLOC_DEFAULT: factor, and don't export it in headers.
	  api.prefix: do not use #define to handle YYSTYPE_IS_TRIVIAL etc.
	  tests: portability fixes.
	  c++: fewer #includes in the headers.
	  glr.cc: formatting changes.
	  tests: more logs.
	  api.prefix: also rename YYDEBUG.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

tests: headers.at: strengthen.
	* tests/headers.at (Several headers): Be stricter when checking
	the exported macros.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: do not override C++ definitions by C macros.
	* data/glr.c: here.
	* data/glr.cc: Fix overquotation.
	* tests/headers.at: Comment changes.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

YYLLOC_DEFAULT: factor, and don't export it in headers.
	* data/c++.m4, data/c.m4 (b4_yylloc_default_define): New.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: Use it.
	* data/glr.cc: Do not define YYLLOC_DEFAULT in the header file,
	but in the implementation one.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

api.prefix: do not use #define to handle YYSTYPE_IS_TRIVIAL etc.
	The following mixture is insane:

#define YYSTYPE_IS_TRIVIAL PREFIX_STYPE_IS_TRIVIAL
	  #if (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)

since, of course YYSTYPE_IS_TRIVIAL is defined.  Instead we could
	define YYSTYPE_IS_TRIVIAL as PREFIX_STYPE_IS_TRIVIAL only when the
	later is defined, but let's avoid stacking CPP on top of M4: rather, use

#if (defined PREFIX_STYPE_IS_TRIVIAL && PREFIX_STYPE_IS_TRIVIAL)

* data/glr.c, data/yacc.c: Use YYSTYPE_IS_TRIVIAL, YYSTYPE_IS_DECLARED,
	YYLTYPE_IS_TRIVIAL and YYLTYPE_IS_DECLARED under their api.prefix-renamed
	name.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

tests: portability fixes.
	Reported by Hydra.

* tests/headers.at (Several headers): Be sure to include config.h
	in the files to compile.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

c++: fewer #includes in the headers.
	* data/lalr1.cc: Define YY_NULL in the *.cc file, it is not needed
	in the header.
	* data/location.cc: iosfwd suffices.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: formatting changes.
	* data/glr.cc: here.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

tests: more logs.
	* tests/headers.at (Several parsers): Here.

2012-07-04  Akim Demaille  <akim@lrde.epita.fr>

api.prefix: also rename YYDEBUG.
	The testsuite in master has shown weird errors for the "Mulitple
	Parsers" tests: the caller of p5.parse() received some apparently
	random value, while tracing p5.parse() showed that the function was
	consistently returning 0.

It happens when mixing several parser headers, some generated without
	%debug, others with.  In particular the C++ parser was generated with
	%debug, i.e., with:

#ifndef YYDEBUG
	  # define YYDEBUG 1
	  #endif

and compiled separatedly.  Yet, its header was included after the one
	of another parser, this time without %debug, i.e., with

#ifndef YYDEBUG
	  # define YYDEBUG 0
	  #endif

in its header.  As a result, the parser was compiled with YYDEBUG set,
	but its header was used without.  Since the layout of the objects are
	then completely different, boom.

Therefore, do not change the value of YYDEBUG.  Rather, use it as a
	default value for <API.PREFIX>DEBUG.

* data/c.m4 (b4_YYDEBUG_define): New.
	(b4_declare_yydebug): Rename as...
	(b4_yydebug_declare): this, for consistency.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: Use it.
	* NEWS: Document it.

2012-07-02  Akim Demaille  <akim@lrde.epita.fr>

formatting changes.
	* data/lalr1.cc: here.

2012-07-02  Akim Demaille  <akim@lrde.epita.fr>

NEWS: spell fixes.
	* NEWS: here.
	Reported by Stefano Lattarini.

2012-07-02  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  NEWS: spell check.
	  api.prefix.

2012-07-02  Akim Demaille  <akim@lrde.epita.fr>

NEWS: spell check.
	* NEWS: here.

2012-06-29  Akim Demaille  <akim@lrde.epita.fr>

api.prefix.
	* data/c.m4 (b4_api_prefix, b4_api_PREFIX): New.
	(b4_prefix, b4_union_name, b4_token_enums, b4_declare_yylstype): Use them.
	* data/glr.c, data/yacc.c, data/glr.cc, data/lalr1.cc: Use them to change
	the prefix of exported preprocessor symbols.
	* src/getargs.c (usage): Ditto.
	* tests/headers.at (Several parsers): New.
	* tests/local.at (AT_API_PREFIX): New.
	AT_YYSTYPE, AT_YYLTYPE): Adjust.
	* doc/bison.texi (Multiple Parsers): Move documentation of %name-prefix to...
	(Table of Symbols): here.
	(Multiple Parsers): Document api.prefix.
	(%define Summary): Point to it.
	Use @code for variable names.
	(Bison Options): -p/--name-prefix are obsoleted.
	* NEWS: Announce api.prefix.

2012-06-29  Victor Santet  <victor.santet@epita.fr>

warnings: display warnings categories
	* src/complain.c (error_message): Call 'warnings_print_categories'.
	* src/gram.c (grammar_rules_useless_report): Display itself warning
	category.
	* tests/actions.at, tests/conflicts.at, tests/existing.at,
	tests/input.at, tests/named-refs.at, tests/output.at, tests/reduce.at,
	tests/regression.at, tests/skeletons.at: Adjust.
	* NEWS: Document this.

2012-06-29  Victor Santet  <victor.santet@epita.fr>

warnings: be ready to print warnings categories
	A function to print warnings categories, like -Wyacc, -Wother, etc.

* src/complain.h, src/complain.c (print_warning_categories): New function.
	* src/output.c (ARRAY_CARDINALITY): Move it to file 'src/system.h'.
	* src/complain.h (enum warnings): New value, 'silent', "complain"
	must not display the warning type.

2012-06-29  Akim Demaille  <akim@lrde.epita.fr>

maint: prepare forthcoming changes
	* src/gram.c (rule_rhs_print): Do not print new line anymore.
	(rule_print): Make it static.
	* src/closure.c, src/derives.c, src/gram.c: Adjust.

2012-06-29  Victor Santet  <victor.santet@epita.fr>

style changes
	* src/complain.c, src/reader.c, src/reduce.c, src/main.c:
	Fix indentation.
	Simplify a bit.

2012-06-28  Akim Demaille  <akim@lrde.epita.fr>

regen.

2012-06-28  Victor Santet  <victor.santet@epita.fr>

warnings: factoring: complaints
	* src/complain.c (error_message): Accept warning categories (an integer) as
	argument.
	Location is a 'const location *' instead of 'location *'.
	(ERROR_MESSAGE): Delete it.
	* src/complain.c, src/complain.h (complains): New function.
	(complain, complain_at, complain_at_indent): Generic functions for
	complaints. Call 'complains'.
	(warn_at, warn_at_indent, warn, yacc_at, midrule_value_at)
	(fatal_at, fatal): Delete them. Adjust dependencies.
	* src/complain.h (enum warnings): New fields 'complaint' and 'fatal'.
	* bootstrap.conf (XGETTEXT_OPTIONS): Adjust.

2012-06-28  Victor Santet  <victor.santet@epita.fr>

warnings: move them to complain.c.
	* src/getargs.h, src/getargs.c (warnings, warnings_flags): Move to...
	* src/complain.h, src/complain.c: Here.

2012-06-28  Victor Santet  <victor.santet@epita.fr>

warnings: rename the categories
	Forthcoming changes will use the warning categories much more often,
	so shortening them will improve readability.

* src/complain.c, src/complain.h, src/conflicts.c,
	* src/getargs.c, src/getargs.h, src/gram.c (enum warnings):
	s/warnings_/W/g.

2012-06-28  Akim Demaille  <akim@lrde.epita.fr>

fix merge.
	* data/bison.m4: Use b4_error_verbose_if after it was defined.

2012-06-28  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  tests: use the generalized default yylex.
	  tests: AT_YYERROR_DEFINE: prepare for list of ints.
	  skeletons: no longer define YYLSP_NEEDED.
	  c++: do not export YYTOKEN_TABLE and YYERROR_VERBOSE.

2012-06-28  Akim Demaille  <akim@lrde.epita.fr>

tests: use the generalized default yylex.
	* tests/actions.at, tests/glr-regression.at, tests/regression.at: here.

2012-06-28  Akim Demaille  <akim@lrde.epita.fr>

tests: AT_YYERROR_DEFINE: prepare for list of ints.
	* tests/local.at (AT_YYERROR_DEFINE): Don't add quotes, check their
	presence to detect char/int types.
	* tests/actions.at, tests/conflicts.at, tests/glr-regression.at,
	* tests/push.at, tests/regression.at: Adjust.

2012-06-27  Akim Demaille  <akim@lrde.epita.fr>

skeletons: no longer define YYLSP_NEEDED.
	* data/c.m4, data/glr.cc: here.
	* NEWS, TODO: Adjust.

2012-06-27  Akim Demaille  <akim@lrde.epita.fr>

c++: do not export YYTOKEN_TABLE and YYERROR_VERBOSE.
	* src/output.c (prepare_symbols): Do not define b4_token_table.
	(prepare): Define b4_token_table_flag.
	* data/bison.m4 (b4_token_table_if): New.
	Arm it when error-verbose.
	* data/glr.c, data/yacc.c (YYTOKEN_TABLE): Remove.
	Use m4.
	* data/lalr1.cc: Likewise.
	(YYERROR_VERBOSE): Remove.
	* NEWS, doc/bison.texi: Document this.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: use *.texi.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

maint: use *.texi.
	This is more consistent with the other packages, and Automake-NG
	supports only *.texi.

* doc/bison.texinfo: Rename as...
	* doc/bison.texi: this.
	* doc/Makefile.am, examples/calc++/Makefile.am: Adjust.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  tests: do not output m4 set up.
	  tests: use the generic yyerror function.
	  tests: use assert instead of plain abort.
	  tests: improve the generic yylex implementation.
	  tests: generalize the compilation macros.
	  tests: fix confusion between api.prefix and name-prefix.
	  maint: gitignores.
	  yacc: work around the ylwrap limitation.

2012-06-26  Victor Santet  <victor.santet@epita.fr>

warnings: raise warning for useless printers or destructors
	* src/scan-code.h (code_props): Add field 'is_used'.
	(CODE_PROPS_NONE_INIT): Adjust.
	* src/scan-code.l (code_props_plain_init, code_props_symbol_action_init)
	(code_props_rule_action_init): Instead of implementing several
	times the initialization of the code_props structures,
	use code_props_none_init.
	* src/symtab.c (symbol_check_defined): If a symbol does not have a
	destructor (resp. printer) but has a type which has a destructor (resp.
	printer), then set field 'is_used' to true.
	(semantic_type_check_defined): If a type has a destructor (resp. printer)
	but all symbols of this type have already a destructor (resp. printer),
	then raise a warning.
	* tests/input.at (Useless printers or destructors): New.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: do not output m4 set up.
	* tests/local.at (AT_BISON_OPTION_PUSHDEFS, AT_BISON_OPTION_POPDEFS):
	Use a diversion to avoid outputting comments etc.
	Removes 17k lines from testsuite (10% of the number of lines).

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: use the generic yyerror function.
	* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Factor.
	Use AT_YYERROR_DEFINE.
	Therefore, instead of using stdout, use and check stderr.
	* tests/glr-regression.at (Uninitialized location when reporting ambiguity):
	Use AT_YYERROR_DEFINE.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: use assert instead of plain abort.
	* tests/actions.at, tests/calc.at, tests/conflicts.at,
	* tests/cxx-type.at, tests/glr-regression.at, tests/input.at,
	* tests/named-refs.at, tests/regression.at, tests/torture.at,
	* tests/local.at:
	Prefer assert to abort.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: improve the generic yylex implementation.
	* tests/local.at (AT_YYSTYPE, AT_YYLTYPE): New.
	(AT_YYLEX_FORMALS): Use them.
	(AT_YYLEX_DEFINE): Be independent of the location implementation.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: generalize the compilation macros.
	* tests/local.at (AT_COMPILE, AT_COMPILE_CXX): If OUTPUT ends with ".o",
	then append the "natural" extension for the input file (.c or .cc).
	If there is no source, pass -c.
	* tests/headers.at, tests/input.at, tests/regression.at: Adjust.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

tests: fix confusion between api.prefix and name-prefix.
	* tests/local.at (AT_NAME_PREFIX): Take api.prefix into account.
	(AT_API_PREFIX): Rename as...
	(AT_API_prefix): this.
	Do not take %name-prefix into account.
	Fix misuses.

2012-06-26  Akim Demaille  <akim@lrde.epita.fr>

maint: gitignores.

2012-06-25  Victor Santet  <victor.santet@epita.fr>

warnings: useless semantic types
	* src/symtab.h (symbol_list): Represent semantic types as structure
	'semantic_type'.
	* src/symlist.c (symbol_list_type_new): Allocate this structure.
	(symbol_list_code_props_set): Set this semantic type's status to used if it
	was not declared.
	* src/symtab.c (semantic_types_sorted): New.
	(semantic_type_new): Set the new semantic type's location appropriately.
	(symbol_check_defined): If a symbol has a type, then set this type's status
	to "declared".
	(semantic_type_check_defined, semantic_type_check_defined_processor): Same
	as symbol_check_defined and symbol_check_defined_processor, but for semantic
	types.
	(symbol_check_defined): Check semantic types usefulness.
	* src/symtab.h (semantic_type): New fields 'location' and 'status'.
	* src/symtab.h, src/symtab.c (semantic_type_new)
	(semantic_type_from_uniqstr, semantic_type_get): Accept a location as a
	supplementary argument.
	* tests/input.at (Unassociated types used for printer of destructor): New.
	* tests/c++.at (AT_CHECK_VARIANTS): Fix an error caught by this commit.

2012-06-25  Akim Demaille  <akim@lrde.epita.fr>

yacc: work around the ylwrap limitation.
	* data/yacc.c (b4_shared_declarations): Include the header guards.
	Do not include the header in the *.c file, duplicate it.
	* NEWS (Future Changes): Extend, and announce the forthcoming change
	about the use of the parser header.

2012-06-25  Akim Demaille  <akim@lrde.epita.fr>

fix for printers and destructors.
	The previous "code_props: factor more" patch sends has_%printer
	etc. to m4, instead of has_printer.

* src/output.c (prepare_symbol_definitions): Fix value of pname.

2012-06-25  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  tests: more uniformity.
	  tests: handle locations in a more generic way.
	  tests: handle locations in the generic yyerror functions.
	  tests: fix AT_CHECK_CALC.
	  tests: improve infrastructure
	  tests: factor.
	  skeletons: minor style changes
	  tests: AT_LANG.
	  c skeletons: factor the declaration of yylloc and yylval.
	  news: condemn YYPARSE_PARAM and YYLEX_PARAM.
	  maint: regen.

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

code_props: factor more.
	* src/symtab.h, src/symtab.c (code_props_type_string): No longer static.
	* src/output.c (CODE_PROPS): Remove, we can now iterate on both the
	destructor and the printer.
	(SET_KEY2): New.

2012-06-22  Victor Santet  <victor.santet@epita.fr>

maint: factor the handling of %printer and %destructor
	There is too much code duplication between %printer and %destructor.
	We used to have two functions for each action: the first one for
	destructors, the second one for printers. Factor using a
	'code_props_type', and an array of code_props instead of two
	members.

* src/symlist.h, src/symlist.c (symbol_list_destructor_set)
	(symbol_list_printer_set): Fuse into...
	(symbol_list_code_props_set): this.
	* src/symtab.h, src/symtab.c (default_tagged_destructor)
	(default_tagged_printer): Fuse into...
	(default_tagged_code_props): this.
	(default_tagless_destructor, default_tagless_printer)
	(default_tagless_code_props): Likewise.
	(code_props_type_string): new.
	(symbol_destructor_set, symbol_destructor_get, semantic_type_destructor_set)
	(default_tagged_destructor_set, default_tagless_destructor_set)
	(symbol_printer_set, symbol_printer_get, semantic_type_printer_set)
	(default_tagged_printer_set, default_tagless_printer_set): Replace by...
	(symbol_code_props_set, symbol_code_props_get, semantic_type_code_props_set)
	(default_tagged_code_props_set, default_tagless_code_props_set): these.
	* src/parse-gram.y (grammar_declaration): Adjust.
	* src/output.c (CODE_PROP, grammar_declaration): Ditto.
	* src/reader.c (symbol_should_be_used): Ditto.

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

tests: more uniformity.
	* tests/local.at (AT_LEX_FORMALS, AT_LEX_ARGS, AT_LEX_PRE_FORMALS)
	(AT_LEX_PRE_ARGS): Rename as...
	(AT_YYLEX_FORMALS, AT_YYLEX_ARGS, AT_YYLEX_PRE_FORMALS)
	(AT_YYLEX_PRE_ARGS): these, for consistency.
	(AT_API_PREFIX): Take %name-prefix into account.
	(AT_YYLEX_PROTOTYPE): New.
	Use it.
	* tests/actions.at, tests/calc.at, tests/cxx-type.at: Adjust to
	use them.

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

tests: handle locations in a more generic way.
	* tests/local.at (AT_YYERROR_PROTOTYPE): New.
	Use it.
	* tests/cxx-type.at: Extensive revamp to use a more traditional
	quotation scheme, and to use the generic yyerror implementation.
	Prefer Autotest macros to CPP macros.
	* tests/java.at: .

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

tests: handle locations in the generic yyerror functions.
	* tests/local.at (AT_YYERROR_DECLARE_EXTERN, AT_YYERROR_DECLARE)
	(AT_YYERROR_DEFINE): Handle locations for C and C++.
	* tests/calc.at: Use it for C++ (as C has extra arguments which
	are not yet handled by AT_BISON_OPTION_PUSHDEFS).
	* tests/actions.at: Adjust.

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

tests: fix AT_CHECK_CALC.
	* tests/calc.at (AT_CHECK_CALC): Contrary to its documentation,
	the test was skipped if given a second argument.
	Unused feature, remove it.

2012-06-22  Akim Demaille  <akim@lrde.epita.fr>

tests: improve infrastructure
	* tests/local.at (AT_LANG): Use c++ instead of cxx for C++.
	Adjust dependencies.
	(AT_YYERROR_DECLARE_EXTERN, AT_YYERROR_DECLARE): Issue nothing
	for C++/Java.
	(AT_YYERROR_DEFINE): Use m4_case.
	(AT_JAVA_COMPILE): Use AT_SKIP_IF.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

tests: factor.
	* tests/glr-regression.at, tests/output.at, tests/push.at,
	* tests/regression.at, tests/torture.at, tests/actions.at:
	Use AT_YYLEX_* and AT_YYERROR_*.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

skeletons: minor style changes
	* data/glr.c, data/yacc.c: here.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

tests: AT_LANG.
	* tests/local.at (AT_BISON_OPTION_PUSHDEFS, AT_BISON_OPTION_POPDEFS):
	Define/undefine AT_LANGE
	(AT_LANG_COMPILE): New.
	(AT_FULL_COMPILE): Use AT_LANG.

2012-06-21  Victor Santet  <victor.santet@epita.fr>

symtab: refactoring
	Prepares forthcoming changes.

* src/symtab.c (symbols_do): Accept the hash table and the sorted
	list as arguments. Adjust dependencies.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

maint: address syntax-check issues.
	* examples/calc++/local.mk: Space changes.
	* src/files.c: Avoid unmarked_diagnostics.
	* src/output.c: Remove useless include.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

c skeletons: factor the declaration of yylloc and yylval.
	There is one difference: now, even without --defines, we generate
	extern declarations for these variables.  The factoring is worth it.
	* data/c.m4 (b4_declare_yylstype): Declare them.
	* data/glr.c, data/yacc.c: Adjust.

2012-06-21  Akim Demaille  <akim@lrde.epita.fr>

news: condemn YYPARSE_PARAM and YYLEX_PARAM.
	* NEWS: here.
	(Bison 1.875): Add %parse-param and %lex-param.
	* doc/bison.texinfo: Spello.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

fix warnings for useless %printer/%destructor
	The previous commit, which turns into a warning what used to be an
	error:

%printer {} foo;
	    %%
	    exp: '0';

has two shortcomings: the warning is way too long (foo is reported
	to be useless later), and besides, it also turns into a warning much
	more serious errors:

%printer {} foo;
	   %%
	   exp: foo;

Reduce the amount to warnings in the first case, restore the error in
	the second.

* src/symtab.h (status): Add a new inital state: undeclared.
	* src/symtab.c (symbol_new): Initialize to undeclared.
	(symbol_class_set): Simplify the logic of the code that neutralize
	the "redeclared" warning after the "redefined" one.
	(symbol_check_defined): "undeclared" is also an error.
	* src/reader.c (grammar_current_rule_symbol_append): Symbols appearing
	in a rule are "needed".
	* src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set):
	An unknown symbol appearing in a %printer/%destructor is "used".
	* src/reduce.c (nonterminals_reduce): Do not report as "useless" symbols
	that are not used (e.g., those that for instance appeared only in a
	%printer).
	* tests/input.at (Undeclared symbols used for a printer or destructor):
	Improve the cover the cases described above.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

gitignore: test-driver.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

maint: style changes.
	* src/reduce.c (reduce_grammar_tables): Define variables with their
	initial value.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

news: fixes.
	* NEWS: Fix spelling.

2012-06-20  Victor Santet  <victor.santet@epita.fr>

warnings: used but undeclared symbols are warnings
	We used to raise an error if a symbol appears only in a %printer or
	%destructor.  Make it a warning.

* src/symtab.h (status): New enum.
	(symbol): Replace the binary "declared" with the three-state "status".
	Adjust dependencies.
	* src/symtab.c (symbol_check_defined): Needed symbols are an error,
	whereas "used" are simply warnings.
	* src/symlist.c (symbol_list_destructor_set, symbol_list_printer): Set
	symbol status to 'used' when associated to destructors or printers.
	* input.at (Undeclared symbols used for a printer or destructor): New.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

maint: regen.
	* Makefile.am (regen): New target.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

regen.

2012-06-20  Akim Demaille  <akim@lrde.epita.fr>

maint: regen.
	* Makefile.am (regen): New target.

2012-06-19  Akim Demaille  <akim@lrde.epita.fr>

tests: enhance AT_YYERROR_DEFINE.
	* tests/local.at: Handle the fact that locations are no longer
	needed with lalr1.cc.

2012-06-19  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  maint: formatting changes.
	  tests: support api.prefix.
	  tests: pacify font-lock-mode.
	  tests: remove test covered elsewhere.
	  tests: factor the declaration/definition of yyerror and yylex.
	  regen.
	  tests: portability issues.
	  tests: call the parser from another compilation unit.
	  glr.c, yacc.c: declare yydebug in the header.
	  skeletons: use header guards.
	  tests: improve AT_FULL_COMPILE.
	  tests: reorder.
	  tests: strengthen the test on generated headers inclusion
	  yacc.c: instead of duplicating y.tab.h inside y.tac.c, include it.
	  yacc.c: factor.

2012-06-19  Akim Demaille  <akim@lrde.epita.fr>

maint: formatting changes.
	* NEWS: Fix indentation of code snippets.
	Untabify.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

tests: support api.prefix.
	* tests/local.at (AT_BISON_OPTION_PUSHDEFS, AT_BISON_OPTION_POPDEFS):
	Define AT_API_PREFIX.
	(AT_YYERROR_DEFINE, AT_YYERROR_DECLARE_EXTERN, AT_YYLEX_DECLARE_EXTERN)
	(AT_YYLEX_DEFINE): Use it.
	* tests/input.at, tests/regression.at, tests/torture.at: Add
	AT_BISON_OPTION_PUSHDEFS/POPDEFS.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

tests: pacify font-lock-mode.
	* tests/local.at: here.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

tests: remove test covered elsewhere.
	* tests/headers.at (%union and --defines): Remove, pretty useless and
	insignificant.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

tests: factor the declaration/definition of yyerror and yylex.
	* tests/local.at (AT_YYERROR_DECLARE, AT_YYERROR_DECLARE_EXTERN)
	(AT_YYERROR_DEFINE, AT_YYLEX_DECLARE, AT_YYLEX_DECLARE_EXTERN)
	(AT_YYLEX_DEFINE): New.
	Must be used inside AT_BISON_OPTION_PUSHDEFS/POPDEFS pair.
	* tests/actions.at, tests/conflicts.at, tests/glr-regression.at,
	* tests/headers.at, tests/input.at, tests/named-refs.at,
	* tests/regression.at, tests/skeletons.at, tests/synclines.at,
	* tests/torture.at: Use them.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

regen.

2012-06-17  Akim Demaille  <akim@lrde.epita.fr>

tests: portability issues.
	* tests/calc.at (AT_CALC_MAIN): Missing include reported by Hydra.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

tests: call the parser from another compilation unit.
	In order to improve the testing of %defines, which exports the
	interface of the generated parser, change the calc.at tests so that
	when %defines is passed, main will be in another compilation unit.  It
	loads the generated header.

* tests/calc.at (AT_CALC_MAIN): New.
	Includes the definition of the global variables.
	Therefore, now declare them from the %requires section of the parser.
	Adjust to yydebug and yyparse being renamed by %name-prefix.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

glr.c, yacc.c: declare yydebug in the header.
	* data/c.m4 (b4_declare_yydebug): New.
	* data/glr.c, data/yacc.c (b4_shared_declarations): Use it.
	Remove the corresponding code from the parser body.
	* NEWS: Doc this.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

skeletons: use header guards.
	* data/glr.c, data/glr.cc, data/yacc.c: here.
	* NEWS: Document it.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

tests: improve AT_FULL_COMPILE.
	* tests/local.at: Accept a third argument.
	Simplify quotation pattern.
	Calls for better refactoring, but will suffice for a while.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

tests: reorder.
	* tests/calc.at (power): Move its definition, as a preparation for
	forthcoming changes.
	And space changes.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

tests: strengthen the test on generated headers inclusion
	* tests/headers.at (AT_TEST_CPP_GUARD_H): Accept Bison directives.
	(Invalid CPP headers): Check glr.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: instead of duplicating y.tab.h inside y.tac.c, include it.
	This is already what glr.c and lalr1.cc do.

* data/yacc.c: here.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

maint: xfdopen, and scope reduction.
	* src/files.h, src/files.c (xfdopen): New.
	* src/output.c (output_skeleton): Use it.
	Reduce the scope of argv.

2012-06-15  Akim Demaille  <akim@lrde.epita.fr>

maint: space changes
	* configure.ac, src/complain.c: space changes.

2012-06-13  Akim Demaille  <akim@lrde.epita.fr>

yacc.c: factor.
	yacc.c used to include two almost identical sections: one for the *.h
	file, and another for the *.c file.  The main difference is that in
	the *.c file we used the yy* names (as %name-prefix is handled by
	"#define yy* <prefix>*" before), while the *.hh used <prefix>* names.
	Keep only the later.  If this is troublesome, b4_shared_declarations
	can easily take the desired prefix as argument.

* data/yacc.c (b4_shared_declarations): New.
	Use it to factor duplicated declarations.

2012-06-13  Stefano Lattarini  <stefano.lattarini@gmail.com>  (tiny change)

cosmetics: prettify names for compiled object for bison
	* src/local.mk (src_bison_SHORTNAME): Define to "bison".

2012-06-13  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: spello.
	* data/lalr1.cc: Reported by Gilles Espinasse.

2012-06-13  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  skeletons: factor yacc.c and glr.c.
	  glr.c: minor refactoring.
	  tests: remove all the -On flags.
	  maint: fix spello.
	  maint: improve release procedure instructions.
	  gnulib: update readme-release.
	  maint: cfg.mk: manual title.
	  maint: cfg.mk: simplify
	  maint: post-release administrivia

2012-06-12  Akim Demaille  <akim@lrde.epita.fr>

skeletons: factor yacc.c and glr.c.
	yacc.c and glr.c share common declarations.  Their YYLTYPE are exactly
	equal, and their YYSTYPE are sufficiently alike to be fused (its
	declaration was protected by YYSTYPE_IS_DECLARED in yacc.c, but not in
	glr.c).  Besides, yacc.c duplicated the definitions of YYLTYPE and
	YYSTYPE (*.h/*.c).

* data/c.m4 (b4_declare_yylstype): New.
	* data/yacc.c, data/glr.c: Use it.

2012-06-12  Akim Demaille  <akim@lrde.epita.fr>

glr.c: minor refactoring.
	* data/glr.c (b4_shared_declarations): Move from the generated file
	section, to the M4 prologue.

2012-06-12  Akim Demaille  <akim@lrde.epita.fr>

tests: remove all the -On flags.
	* tests/atlocal.in: Here.
	Reported by Gilles Espinasse.

2012-06-12  Akim Demaille  <akim@lrde.epita.fr>

maint: fix spello.
	* README-hacking: Here.
	* THANKS: Reported by Gilles Espinasse.

2012-06-12  Akim Demaille  <akim@lrde.epita.fr>

maint: improve release procedure instructions.
	* gnulib: Update, in particular (README-release).
	* bootstrap.conf: don't require gendocs, provided by gnu-web-doc-update,
	provided by readme-release.
	* README-hacking: Update accordingly.

2012-06-07  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update readme-release.
	* gnulib (readme-release): Now includes the modules it promotes.
	* bootstrap.conf: Simplify accordingly.

2012-06-07  Akim Demaille  <akim@lrde.epita.fr>

maint: cfg.mk: manual title.
	* cfg.mk (manuel_title): New.

2012-06-07  Akim Demaille  <akim@lrde.epita.fr>

maint: cfg.mk: simplify
	* cfg.mk: Remove bits provided by maint.mk.

2012-06-07  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

maint: an envvar equal to "00" is 0.
	* src/output.c (prepare): here.
	Reported by Paul Eggert.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

maint: don't use mbsr?chr.
	Basically, revert ba60c39547a445dee3e07920931b4d7a81843868's move to
	mbs* functions, which was prompted by -DGNULIB_POSIXCHECK.  See
	<http://lists.gnu.org/archive/html/bison-patches/2012-05/msg00052.html>
	and following.

* bootstrap.conf: No longer ask for them.
	* src/files.c, src/getargs.c, src/location.c,
	* src/parse-gram.c, src/parse-gram.y, src/scan-gram.l,
	* src/symtab.c: s/mbs(r?chr)/str$1/g.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

maint: use xconcat-filename.
	* bootstrap.conf (gnulib_modules): Request it.
	* src/output.h, src/output.c (compute_pkgdatadir): Rename as...
	(pkgdatadir): this.
	Adjust dependencies.
	* src/output.c (output_skeleton): Reduce the scope of "in".
	Use xconcatenated_filename to simplify the construction of the
	qualified paths to m4sugar.m4, bison.m4, and the selected skeleton.
	There are a few minor differences: the new code uses strchr instead of
	mbschr (but this was not really justified), and the new code does not
	garantee a single slash even if $BISON_PKGDATADIR ends with several
	(which was considered more accurate).  See the discussion at
	<http://lists.gnu.org/archive/html/bison-patches/2012-05/msg00052.html>.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

maint: minor simplification
	* src/output.c (prepare): Assign use_push_for_pull_flag's value at its
	declaration.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  version 2.5.1
	  NEWS: prepare for 2.5.1.
	  maint: update release procedure
	  maint: fix comment typos
	  maint: post-release administrivia

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

version 2.5.1
	* NEWS: Record release date.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

NEWS: prepare for 2.5.1.
	* NEWS: Be compliant with do-release-commit-and-tag.

2012-06-05  Akim Demaille  <akim@lrde.epita.fr>

maint: update release procedure
	* bootstrap.conf: Request do-release-commit-and-tag and readme-release.
	* README-hacking: Adjust.

2012-06-05  Jim Meyering  <meyering@redhat.com>

maint: fix comment typos
	Using http://github.com/lyda/misspell-check, massage its
	output into sed commands to perform the suggested changes.
	Initially, I filtered out the THRU->Through changes, because
	that failed to retain capitalization in the grammar token.
	Instead, do this manually, beforehand:

sed -i s/THRU/THROUGH/ tests/existing.at
	git ls-files|misspellings -f -|perl -nl \
	  -e '/^(.*?)\[(\d+)\]: (\w+) -> "(.*?)"$/ or next;' \
	  -e '($file,$n,$l,$r)=($1,$2,$3,$4); $q="'\''"; $r=~s/$q/$q\\$q$q/g;'\
	  -e 'print "sed -i $q${n}s!$l!$r!$q $file"'|bash

2012-05-24  Akim Demaille  <akim@lrde.epita.fr>

build: regen.

2012-05-24  Akim Demaille  <akim@lrde.epita.fr>

Merge tag 'v2.5.1_rc2'
	Bison 2.5.1_rc2.

* tag 'v2.5.1_rc2': (34 commits)
	  Bison 2.5.1_rc2.
	  doc: fixes.
	  build: fix ChangeLog generation.
	  c++: compute the header guards.
	  skeletons: remove support for unused directive.
	  lalr1.cc: improve Doxygen documentation.
	  lalr1.cc: extract stack.hh.
	  news: convert to double quotes.
	  space changes.
	  build: do not prototype flex-generated functions.
	  build: fix ChangeLog generation.
	  Bison 2.5.1_rc1.
	  tests: save/restore Autotest special files when checking XML support.
	  tests: AT_SAVE_SPECIAL_FILES / AT_RESTORE_SPECIAL_FILES.
	  tests: honor TESTSUITEFLAGS in all the check targets.
	  build: do not enable c++ warnings on 0 when nullptr is not supported.
	  maint: update gnulib.
	  build: config.in.h.
	  build: move silent rules.
	  glr.c: reduce variable scopes.
	  maint: maintainer-release-check.
	  maint: shush a syntax-check.
	  maint: prefer "commit message" to "log entry".
	  command line: fix minor leaks.
	  maint: we no longer maintain the ChangeLog.
	  maint: fix the generation of the synclines for bison's parser.
	  maint: regen.
	  maint: import the xmemdup0 gnulib module.
	  maint: remove left-over gnulib modules.
	  maint: ignore files imported by autopoint.
	  build: AC_PROG_LEX: use more readable variable names.
	  maint: regen src/parse-gram.[ch]
	  maint: simplify parse-gram.y
	  maint: s/strncpy/memcpy/, when equivalent

2012-05-23  Akim Demaille  <akim@lrde.epita.fr>

maint: post-release administrivia
	* NEWS: Add header line for next release.
	* .prev-version: Record previous version.
	* cfg.mk (old_NEWS_hash): Auto-update.

2012-05-23  Akim Demaille  <akim@lrde.epita.fr>

Bison 2.5.1_rc2.
	* NEWS: Update.

2012-05-23  Akim Demaille  <akim@lrde.epita.fr>

doc: fixes.
	* doc/bison.texinfo: Fix errors spotted by syntax-check.

2012-05-23  Akim Demaille  <akim@lrde.epita.fr>

build: fix ChangeLog generation.
	* gnulib: Update to get newest gitlog-to-changelog.
	* bootstrap: Update.
	* Makefile.am (gen-ChangeLog): Fix for Bison's git log style.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

c++: compute the header guards.
	This is a frequent request.  Recently pointed out by Wei Song,
	<http://lists.gnu.org/archive/html/help-bison/2012-05/msg00002.html>.

* data/c.m4 (b4_tocpp, b4_cpp_guard, b4_cpp_guard_open)
	(b4_cpp_guard_close): New.
	* data/lalr1.cc, data/location.cc, data/stack.hh: Use them.
	* TODO (Header Guards): Move to...
	* NEWS: here.
	Formatting changes.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

skeletons: remove support for unused directive.
	* src/scan-skel.l (@dir_prefix@): Remove support, has never been
	used, not even in the commit that introduced it,
	2b81e969ea04c1a6502928ba7e847ec8ff7dcb2f.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: improve Doxygen documentation.
	* data/location.cc: Qualify file names with directory name.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

lalr1.cc: extract stack.hh.
	See commit 51bacae6b58fd5c6cce861f00440dc917384625e.
	* data/stack.hh: New, extracted from...
	* data/lalr1.cc: here.
	* data/Makefile.am: Adjust.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

news: convert to double quotes.
	* NEWS: Convert from `quoted' to "quoted".
	Reported by Stefano Lattarini.
	http://lists.gnu.org/archive/html/bison-patches/2012-05/msg00039.html

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

space changes.
	* src/flex-scanner.h: Indent nested cpp directives.

2012-05-21  Akim Demaille  <akim@lrde.epita.fr>

build: do not prototype flex-generated functions.
	Some versions of Flex, possibly modified by the distribution package
	maintainers, have incompatible signatures.  Since newer versions of
	Flex prototype their functions, avoid the conflicts in that case.
	Reported by Stefano Lattarini.
	<http://lists.gnu.org/archive/html/bug-bison/2012-05/msg00012.html>.

* src/flex-scanner.h (FLEX_VERSION_GT): New.
	Use it to issue prototypes for flex-generated functions only for
	versions up to 2.5.31, in accordance with the comment.
	See commit dc9701e848f27ae64b6ddcf809580998667d60f2.
	Use it to define yylex_destroy when needed.

2012-05-16  Akim Demaille  <akim@lrde.epita.fr>

build: fix ChangeLog generation.
	* Makefile.am (gen-ChangeLog): Fix for VPATH builds.

2012-05-14  Akim Demaille  <akim@lrde.epita.fr>

Bison 2.5.1_rc1.
	* NEWS: Update.
	* src/parse-gram.c, src/parse-gram.h: Regen.

2012-05-11  Akim Demaille  <akim@lrde.epita.fr>

tests: save/restore Autotest special files when checking XML support.
	Currently the test 248, "parse-gram.y: LALR = IELR", fails
	BISON_TEST_XML is set.

* tests/local.at (AT_BISON_CHECK_XML): Belt: Save/restore files.
	* tests/regression.at (parse-gram.y: LALR = IELR): Suspenders: Don't
	rely on expout.
	Each one of these changes suffices.

2012-05-11  Akim Demaille  <akim@lrde.epita.fr>

tests: AT_SAVE_SPECIAL_FILES / AT_RESTORE_SPECIAL_FILES.
	Some of our macros play with expout and other Autotest special files,
	which may break their callers (e.g., currently TESTSUITEFLAGS='248
	BISON_TEST_XML=1' fails).

There is already some support for this.  Expand it to be ready to use
	it elsewhere.

* tests/local.at (AT_RESTORE_SPECIAL_FILES, AT_SAVE_SPECIAL_FILES)
	(at_save_special_files, at_restore_special_files): New.
	(AT_BISON_CHECK_NO_XML): Use them.

2012-05-11  Akim Demaille  <akim@lrde.epita.fr>

tests: honor TESTSUITEFLAGS in all the check targets.
	* tests/Makefile.am (installcheck-local): Simplify.
	(maintainer-check-posix, maintainer-check-valgrind): Honor
	$(TESTSUITEFLAGS).

2012-05-11  Akim Demaille  <akim@lrde.epita.fr>

build: do not enable c++ warnings on 0 when nullptr is not supported.
	* configure.ac (WARN_CXXFLAGS): Enable -Wzero-as-null-pointer-constant
	only when nullptr is supported..

2012-05-11  Akim Demaille  <akim@lrde.epita.fr>

maint: update gnulib.
	* bootstrap, gnulib: Update.

2012-05-09  Akim Demaille  <akim@lrde.epita.fr>

build: config.in.h.
	Historically we used config.hin (where everybody else used
	config.h.in) to please DOS.  Now that we use gnulib, there are already
	tons of files with several dots, especially *.in.h.

* configure.ac: Rename config.hin as config.in.h.

2012-05-09  Akim Demaille  <akim@lrde.epita.fr>

build: move silent rules.
	* tests/Makefile.am: In the generation of the test suite.

2012-05-09  Akim Demaille  <demaille@gostai.com>

glr.c: reduce variable scopes.
	* data/glr.c: Where appropriate, fuse variable declarations followed
	by assignments by variable declarations with a value.
	Where appropriate, introduce new scopes to limit variable spans.

2012-05-08  Akim Demaille  <akim@lrde.epita.fr>

maint: maintainer-release-check.
	* tests/Makefile.am (maintainer-release-check): New.
	* Makefile.am (MAINTAINER_CHECKS): New.
	Support maintainer-release-check.
	* README-hacking: Document it, and syntax-check too.

2012-05-08  Akim Demaille  <akim@lrde.epita.fr>

maint: shush a syntax-check.
	* cfg.mk: lib/timevar is not planned to be gnulib'ed, as it comes
	from GCC.

2012-05-08  Akim Demaille  <akim@lrde.epita.fr>

maint: prefer "commit message" to "log entry".
	* README-hacking: here.
	Suggested by Stefano Lattarini.

2012-05-08  Akim Demaille  <akim@lrde.epita.fr>

command line: fix minor leaks.
	* src/getargs.c (getargs): Free pointers before allocating them new
	content.

2012-05-08  Akim Demaille  <akim@lrde.epita.fr>

maint: we no longer maintain the ChangeLog.
	* .gitattributes: No need to merge it.
	* README-hacking: Update release instructions.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

maint: fix the generation of the synclines for bison's parser.
	* tests/bison.in: Import from master the changes that make
	this script generate synclines that are independant of the
	builddir/srcdir user's set up.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

maint: regen.
	* src/parse-gram.c, src/parse-gram.h: Regen.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

maint: import the xmemdup0 gnulib module.
	* bootstrap.conf: Require this module.
	* src/parse-gram.y: Include xmemdup0.h.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

maint: remove left-over gnulib modules.
	* bootstrap.conf (gnulib_modules): Remove pipe-posix.
	* lib/.gitignore, m4/.gitignore: Remove files that we no longer use.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

maint: ignore files imported by autopoint.
	* m4/.gitignore: here.

2012-05-06  Akim Demaille  <akim@lrde.epita.fr>

build: AC_PROG_LEX: use more readable variable names.
	* m4/flex.m4 (AC_PROG_LEX): Prefer LEX_IS_FLEX to FLEX.
	Prefer true/false to yes/no for such variables.
	* configure.ac: Adjust.

2012-05-06  Jim Meyering  <meyering@redhat.com>

maint: regen src/parse-gram.[ch]

2012-05-06  Jim Meyering  <meyering@redhat.com>
	    Akim Demaille  <akim@lrde.epita.fr>

maint: simplify parse-gram.y
	* src/parse-gram.y (add_param): Use xmemdup0 in place of
	xmalloc+memcpy, and strspn in place of an open-coded loop.

2012-05-06  Jim Meyering  <meyering@redhat.com>

maint: s/strncpy/memcpy/, when equivalent
	* src/output.c (output_skeleton): Use memcpy, not strncpy,
	since the source is known to fit in the destination buffer.
	* src/parse-gram.y (%skeleton): Likewise.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.c: formatting changes.
	* data/glr.c: Fix indentation.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/master'
	* origin/master:
	  glr.c: untabify.
	  glr.cc: untabify.
	  glr.cc: formatting changes.
	  glr.cc: remove unused signature.
	  glr.cc: properly declare locations are const where appropriate.
	  doc: fix @xref.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.c: untabify.
	* data/glr.c: here.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: untabify.
	* data/glr.cc: here.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: formatting changes.
	* data/glr.cc: Fit in 80 columns.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: remove unused signature.
	* data/glr.cc (yydestruct_): Not used, remove.
	It is yydestruct which is used.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

glr.cc: properly declare locations are const where appropriate.
	* data/glr.cc (yyerror): The location is const.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

doc: fix @xref.
	* doc/bison.texinfo: here.

2012-05-04  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint: (22 commits)
	  tests: ignore code coverage/profiling failure messages
	  doc: fix some invalid @ref.
	  build: fix previous commit.
	  install-pdf: fix.
	  NEWS: Update.
	  %printer: support both yyo and yyoutput.
	  doc: mfcalc: demonstrate %printer.
	  tests: style changes.
	  build: require Flex.
	  build: flex.m4: check for Flex.
	  build: flex.m4: quote properly.
	  build: flex.m4.
	  build: autoconf: update.
	  glr: eliminate last bits of unwanted locations.
	  NEWS: 2.6 will drop K&R.
	  TODO: remove dead items.
	  TODO: import from master.
	  gnulib: update.
	  maint: update NEWS.
	  doc: fix index.
	  doc: fix documentation of YYERROR.
	  c++: more YY_NULL

2012-05-02  Akim Demaille  <akim@lrde.epita.fr>

tests: ignore code coverage/profiling failure messages
	The Hydra buildfarm provides code coverage analysis.  For some reason,
	in some test cases, code coverage data seem to be incompatible, and
	generate error messages at parser run-time.  Ignore these messages so
	that (i) these tests do pass, (ii) coverage results be provided by
	Hydra.

* tests/local.at (AT_PARSER_CHECK): Ignore messages for failed merges
	of code coverage/profiling results.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

doc: fix some invalid @ref.
	* doc/bison.texinfo: Fix incorrect @ref uses.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

build: fix previous commit.
	* bootstrap: Update from gnulib.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

install-pdf: fix.
	* gnulib: Fix install-pdf in po/ and runtime-po/.
	Reported by Hans Aberg.
	Fixed by Joel E. Denny.
	http://lists.gnu.org/archive/html/bug-bison/2011-05/msg00008.html

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

NEWS: Update.
	* NEWS: Spell check.
	(%printer): is now documented.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

%printer: support both yyo and yyoutput.
	lalr1.cc used to support yyo, but not yyoutput.  Support both,
	but document only yyoutput (at least until there is some consensus
	on this).

* data/c.m4 (yy_symbol_value_print): Also support yyo.
	* data/glr.cc  (yy_symbol_value_print_): Support both yyo and yyoutput.
	* data/lalr1.cc: Also support yyoutput.
	* doc/bison.texinfo: Explicitly use yyoutput in the examples.
	* examples/mfcalc/mfcalc.test: Test the -p option.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

doc: mfcalc: demonstrate %printer.
	* doc/bison.texinfo (Printer Decl): New.
	Number mfcalc.y snippets so that they are output in
	the proper order.
	(The mfcalc Main): Use yydebug.
	(Debugging): Simplify the text.
	(Enabling Traces, Mfcalc Traces, The YYPRINT Macro): New.
	(Table of Symbols): Document YYPRINT and YYFPRINTF.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

tests: style changes.
	* tests/input.at: Use "print" in %printer instead of "destroy".
	It is unused, so we don't care, yet it is less surprising.
	* tests/actions.at: Comment changes.

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

%printer: support both yyo and yyoutput.
	lalr1.cc used to support yyo, but not yyoutput.  Support both,
	but document only yyoutput (at least until there is some consensus
	on this).

2012-04-16  Akim Demaille  <akim@lrde.epita.fr>

tests: style changes.
	* tests/input.at: Use "print" in %printer instead of "destroy".
	It is unused, so we don't care, yet it is less surprising.
	* tests/actions.at: Comment changes.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

build: require Flex.
	* configure.ac: Require Flex.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

build: flex.m4: check for Flex.
	* m4/flex.m4 (_AC_PROG_LEX_YYTEXT_DECL): Check that $LEX
	supports some of the Flex options, and exclusive start conditions.
	Define FLEX to 'yes'/'', as AC_PROG_CC does for GCC.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

build: flex.m4: quote properly.
	* m4/flex.m4: Use quotes more systematically.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

build: flex.m4.
	* m4/flex.m4: New.
	An exact copy of what is in Autoconf currently.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

build: autoconf: update.
	* submodules/autoconf: Update.
	There are no changes in data/m4sugar/foreach.m4, and the
	changes in data/m4sugar/m4sugar.m4 are minor.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

glr: eliminate last bits of unwanted locations.
	* data/glr.c (YYLTYPE): Do not define when locations are
	not demanded.
	Adjust all dependencies.

2012-04-10  Akim Demaille  <akim@lrde.epita.fr>

NEWS: 2.6 will drop K&R.
	* NEWS: here.
	(glr.c): Fix a spello.

2012-04-09  Akim Demaille  <akim@lrde.epita.fr>

TODO: remove dead items.
	* TODO (Documentation, %printer, Java): Remove, already done (or just
	waiting for approval).
	(Fortran, BTYacc): Remove, there does not seem to be demand.

2012-04-09  Akim Demaille  <akim@lrde.epita.fr>

TODO: import from master.
	* TODO: Copy the current version.

2012-04-08  Akim Demaille  <akim@lrde.epita.fr>

tests: fix bison wrapper.
	* tests/bison.in (PERL): Fix.

2012-04-08  Akim Demaille  <akim@lrde.epita.fr>

doc: fix some invalid @ref.
	* doc/bison.texinfo: Fix incorrect @ref uses.

2012-04-08  Akim Demaille  <akim@lrde.epita.fr>

build: extexi: support out-of-order blocks.
	* examples/extexi (%file_output): Remove.
	(&process): Accept "FILE: BLOCK-NUM" requests.

2012-04-08  Akim Demaille  <akim@lrde.epita.fr>

* configure.ac (PERL): New.
	* doc/Doxyfile.in, doc/local.mk, examples/local.mk,
	* tests/bison.in: Use it.

2012-04-08  Akim Demaille  <akim@lrde.epita.fr>

maint: rewrite extexi in Perl.
	* examples/extexi: Rewrite in Perl.
	* examples/local.mk (extract): Adjust.

2012-04-07  Akim Demaille  <akim@lrde.epita.fr>

build: simplify clean.
	* doc/local.mk (CLEANFILES): Since the previous commit,
	there a no longer such files.
	* Makefile.in (CLEANFILES): Initialize here.

2012-04-07  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.
	* bootstrap.conf (bootstrap_sync): True again.
	It was disabled while waiting for changes to be integrated
	in gnulib's bootstrap, which was done long ago.
	* bootstrap, gnulib: Update.

2012-04-04  Akim Demaille  <akim@lrde.epita.fr>

maint: update NEWS.
	* NEWS: Fix entry about __attribute__.
	Reorder by "decreasing" order of importance.

2012-04-04  Akim Demaille  <akim@lrde.epita.fr>

doc: fix index.
	http://lists.gnu.org/archive/html/bison-patches/2012-04/msg00006.html

* doc/bison.texinfo: Avoid using @def* variant with more
	than the defined entity as main entity, as it results in
	an incorrect index.  For instance, don't document
	{return YYERROR;}, which results in a single index entry
	"return YYERROR;", but rather as typed function whose
	return type is "type", and whose argument list is ";".

2012-04-04  Akim Demaille  <akim@lrde.epita.fr>

doc: fix documentation of YYERROR.
	* doc/bison.texinfo (Table of Symbols): Fix the documentation
	of YYERROR by copying that from "Action Features".

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

build: fix distcheck issues.
	For some reason it seems that texi2dvi -o no longer forces --clean
	mode, so we have stray TeX compilation files staying in top_builddir
	since TeX is run from there.

While at it, upgrade the generation of the (completely obsolete)
	reference card.  Target PDF.

* doc/local.mk (TEXI2DVI): Pass --build-dir.
	(CLEANDIRS): More accurate.
	(doc/refcard.dvi): Replace with...
	(doc/refcard.pdf): this.
	Adjust dependencies.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

build: don't rely on $< in non-pattern rules.
	* doc/local.mk, tests/local.mk: here.
	Reported by Stefano Lattarini.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

doc: upgrade Doxyfile.
	* doc/Doxyfile.in: Run doxygen -u.
	Prompted by Tim Landscheidt.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

doc: help Doxygen find our files.
	* doc/Doxyfile.in (INCLUDE_PATH): here.

2012-04-01  Tim Landscheidt  <tim@tim-landscheidt.de>

Fix Doxygen generation and clean-up.
	* doc/Doxyfile.in: Amend OUTPUT_DIRECTORY.
	* doc/local.mk (html-local): Amend working directory.
	(CLEANDIRS): Fix "html", remove "latex".

2012-04-01  Tim Landscheidt  <tim@tim-landscheidt.de>

Fix Doxygen comment.
	* src/InadequacyList.h: s#</t>#</tt>#.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

c++: more YY_NULL
	Caught by maintainer-check-g++.
	* data/glr.c, data/lalr1.cc, data/yacc.c, tests/cxx-type.at,
	* tests/glr-regression.at, tests/push.at:
	When simple to do, avoid expliciting the null ptr.
	Otherwise use YY_NULL.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'origin/maint'
	* origin/maint:
	  bump to 2012 in skeletons.
	  build: remove ancient Autoconf tests.
	  doc: c++: complete the location documentation.
	  c++: locations: provide convenience constructors.
	  c++: locations: remove useless "inline".
	  glr: do not use locations when they are not requested
	  c++: use nullptr for C++11.
	  build: simplify and improve the compiler warnings for tests.
	  gnulib: update.
	  maint: formatting changes.
	  NEWS: update.
	  Java: Fix syntax error handling without error token.
	  tests: beware of -pedantic on large #line numbers.
	  tests: when using the C++ compiler, use its flags too.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

bump to 2012 in skeletons.
	* data/glr.c, data/glr.cc, data/lalr1.cc, data/lalr1.java,
	* data/location.cc, data/yacc.c: Bump copyright year ranges.

2012-04-01  Akim Demaille  <akim@lrde.epita.fr>

build: remove ancient Autoconf tests.
	lib/subpipe.c was removed in 47fa574761319b0a422691223c9b8a9a72f36aa2.

* m4/subpipe.m4: Remove.
	* configure.ac (BISON_PREREQ_SUBPIPE): Remove.

2012-03-31  Akim Demaille  <akim@lrde.epita.fr>

doc: c++: complete the location documentation.
	* data/location.cc (position::initialize, location::initialize):
	Also accept line and column, with default values.
	* doc/bison.texinfo (C++ position, C++ location): New nodes.
	Describe more thoroughly these classes.
	Fix several Texinfo misuses.

2012-03-31  Akim Demaille  <demaille@gostai.com>

c++: locations: provide convenience constructors.
	* data/location.cc (position::position): Accept file, line and
	column as arguments with default values.
	Always qualify initial line and column literals as unsigned.
	(location::location): Provide convenience constructors.

2012-03-31  Akim Demaille  <akim@lrde.epita.fr>

c++: locations: remove useless "inline".
	* data/location.cc: "inline" is implicit when defining
	methods in the class definition.

2012-03-31  Akim Demaille  <akim@lrde.epita.fr>

glr: do not use locations when they are not requested
	When the test suite runs with -O2 and warnings enabled, G++
	complains of locations being used, but not initialized.
	The simplest is to not use locations.

* data/glr.c (b4_locuser_formals, b4_locuser_args): New.
	Use them when locations should not be used.
	Use b4_locations_if where appropriate.
	(yyuserAction): Modify the order to the arguments to make
	it more alike the other routines, and to make use of
	b4_locuser_args simpler.

2012-03-31  Akim Demaille  <akim@lrde.epita.fr>

c++: use nullptr for C++11.
	C++11 introduces "nullptr" which plays the role of C's NULL, in
	replacement of "0".  Fix the C++ skeletons to avoid warnings about
	uses of "0" in place of "nullptr", and improve C skeletons to also use
	this "nullptr" when compiled with a C++11 compiler.

* configure.ac: More C++ warnings.
	* NEWS (2.5.1): Document this.
	* data/c++.m4, data/c.m4 (b4_null_define): New.
	(b4_null): Use YY_NULL instead of 0.
	* data/glr.c, data/lalr1.cc, data/location.cc, data/yacc.c:
	Call b4_null_define/b4_null where appropriate.
	Use YY_NULL instead of NULL.
	* data/location.cc (initialize): Accept a default argument,
	YY_NULL.
	* tests/actions.at, tests/calc.at: Adjust.

* data/glr.c, lib/libiberty.h, src/system.h (__attribute__):
	Do not disable it when __STRICT_ANSI__ is defined, as, for
	instance, it disables the __attribute__((unused)) which
	protects us from some compiler warnings.
	This was already done elsewhere in Bison, in 2001, see
	4a0d89369599a2cea01f4fbdf791f426a02cb5a3.
	* tests/regression.at: Adjust output.

2012-03-30  Akim Demaille  <akim@lrde.epita.fr>

build: simplify and improve the compiler warnings for tests.
	* configure.ac (warn_common, warn_c, warn_cxx): New.
	Use them to compute independently the options supported
	by the C and C++ compilers.
	Don't AC_SUBST the variables passed to gl_WARN_ADD: it
	does it for us.
	(WARN_CFLAGS_TEST, WARN_CXXFLAGS_TEST): Don't aggregate
	$WARN_CFLAGS and $WARN_CXXFLAGS in them now, leave it
	to atlocal.in.
	(O0CFLAGS, O0CXXFLAGS): Move their definition to...
	* tests/atlocal.in: here.
	Be more systematic between C and C++.
	Reorder to factor between variables.
	Propagate all of the variables when --compile-c-with-cxx.

2012-03-30  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.

2012-03-30  Akim Demaille  <akim@lrde.epita.fr>

maint: formatting changes.
	* src/system.h: Indent CPP directives using cppi.

2012-03-27  Akim Demaille  <akim@lrde.epita.fr>

NEWS: update.
	* NEWS: Java fixes, more about the doc changes, liby issues.

2012-03-27  Tim Landscheidt  <tim@tim-landscheidt.de>

Java: Fix syntax error handling without error token.
	* data/lalr1.java (YYParser::parse): Here.
	* tests/java.at: Add test case.

2012-03-24  Akim Demaille  <akim@lrde.epita.fr>

tests: beware of -pedantic on large #line numbers.
	* tests/local.at (AT_TEST_TABLES_AND_PARSE): Don't pass -pedantic
	when compiling large canonical-LR parsers.
	Reported by Tys Lefering.
	http://lists.gnu.org/archive/html/bug-bison/2012-03/msg00025.html

2012-03-24  Akim Demaille  <akim@lrde.epita.fr>

tests: when using the C++ compiler, use its flags too.
	* tests/local.at: Go for colors.
	(--compile-c-with-cxx): New option.
	We used to pass "CC=$CXX" as command line argument,
	but it was not possible to adjust CFLAGS accordingly
	in atlocal, since it is loaded before assignments on
	the command line are honored (so that the command line
	takes precedence).
	* tests/atlocal.in: Implement it.
	* tests/local.mk: Use it.

2012-03-24  Akim Demaille  <akim@lrde.epita.fr>

tests: style changes in the Makefile.
	* tests/local.mk: Prefer passing variable assignment by
	the command line, instead of the environment, so that it
	is reported in the logs.
	Prefer single quotes for shell literal strings.

2012-03-24  Akim Demaille  <akim@lrde.epita.fr>

tests: fix dependencies.
	* tests/local.mk (check_SCRIPTS): Add atlocal and atconfig so
	that they are properly updated before running tests.
	(RUN_TESTSUITE_deps): New.
	Use it to factor the dependencies of "*-check" targets,
	especially those that don't bounce to the regular
	"check-local" target, since then they don't benefit from the
	proper dependencies (such as atlocal).

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

Merge remote-tracking branch 'fsf/maint'
	* fsf/maint: (404 commits)
	  doc: update the --verbose report format.
	  doc: spell check.
	  doc: stmt, not stmnt.
	  doc: save width.
	  doc: reformat grammar snippets.
	  doc: use only @example, not @smallexample.
	  doc: style changes.
	  doc: minor fixes to "Understanding" section
	  tests: minor fixes/simplifications
	  tests: be robust to quote style.
	  maint: update gnulib.
	  tests: be robust to POSIXLY_CORRECT being defined.
	  doc: fix environment issues.
	  regen.
	  tests: fix regressions.
	  glr: fix ambiguity reports.
	  doc: stylistic improvements.
	  maint: address sc_prohibit_doubled_word.
	  maint: address sc_prohibit_always-defined_macros.
	  maint: address sc_bindtextdomain, sc_program_name and sc_prohibit_HAVE_MBRTOWC.
	  ...

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: spell fix.
	* doc/bison.texinfo: here.
	Reported by Tim Landscheidt.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: update the --verbose report format.
	* doc/bison.texinfo (Understanding): Adjust to match the
	current format.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: spell check.
	* doc/bison.texinfo: here.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: stmt, not stmnt.
	* doc/bison.texinfo: s/stmnt/stmt/g.  This is a
	much more common abbreviation for "statement".

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: save width.
	* doc/bison.texinfo (Language and Grammar): Use the same
	layout for an example in all the versions, i.e., keep
	as general case what used to be used only for Info.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: reformat grammar snippets.
	* doc/bison.texinfo: Convert the grammar examples to
	use a narrower style.  This helps fitting into the
	@smallbook constraints.
	http://lists.gnu.org/archive/html/bison-patches/2012-03/msg00011.html

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: use only @example, not @smallexample.
	* doc/bison.texinfo: Convert all @smallexamples into @examples.
	Adjust layout where needed.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: style changes.
	* doc/bison.texinfo: Avoid line width issues with TeX.
	Upgrade ancient messages.
	Move some comments to better looking places.
	Add more @group.
	(Mfcalc Symbol Table): Reduce variable scopes.
	Prefer size_t for sizes.
	Prefer declarations with an initial value.
	Fix a @group environment.

2012-03-19  Paul Eggert  <eggert@cs.ucla.edu>

doc: minor fixes to "Understanding" section
	* doc/bison.texinfo (Understanding): Minor wording fixes and
	improvements.  Fixes problems reported in
	<https://savannah.gnu.org/patch/?4306>.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: update the --verbose report format.
	* doc/bison.texinfo (Understanding): Adjust to match the
	current format.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: spell check.
	* doc/bison.texinfo: here.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: stmt, not stmnt.
	* doc/bison.texinfo: s/stmnt/stmt/g.  This is a
	much more common abbreviation for "statement".

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: save width.
	* doc/bison.texinfo (Language and Grammar): Use the same
	layout for an example in all the versions, i.e., keep
	as general case what used to be used only for Info.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

doc: use only @example, not @smallexample.
	* doc/bison.texinfo: Convert all @smallexamples into @examples.
	Adjust layout where needed.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

c.m4: better newline control with b4_parse_param_use.
	* data/c.m4: Use m4_ifvaln instead of m4_ifval where
	applicable.
	(b4_parse_param_use): Switch order between two nested
	"if"s to avoid useless empty lines.
	Adjust callers to avoid useless lines.

2012-03-19  Akim Demaille  <akim@lrde.epita.fr>

glr.c: remove (broken) support for YYPRINT.
	YYPRINT uses yytoknum which glr does not define.  Since YYPRINT
	is considered obsolete, and did not work, don't fix its support,
	remove it from glr.c.

* data/c.m4 (yy_symbol_value_print): Use YYPRINT only for yacc.c.
	* TODO: Done.

2012-03-17  Paul Eggert  <eggert@cs.ucla.edu>

doc: minor fixes to "Understanding" section
	* doc/bison.texinfo (Understanding): Minor wording fixes and
	improvements.  Fixes problems reported in
	<https://savannah.gnu.org/patch/?4306>.

2012-03-15  Akim Demaille  <akim@lrde.epita.fr>

TODO: update.

2012-03-15  Akim Demaille  <akim@lrde.epita.fr>

gnulib: update.

2012-03-13  Akim Demaille  <demaille@gostai.com>

tests: minor fixes/simplifications
	* tests/local.at (AT_BISON_CHECK_NO_XML): Simplify sed programs,
	quotation, and default value assignments.
	Ensure a proper value to the numeric variables.
	Reported by Lie Yan.
	http://lists.gnu.org/archive/html/bug-bison/2012-03/msg00000.html

2012-03-13  Akim Demaille  <akim@lrde.epita.fr>

maint: fix distcheck.
	* examples/local.mk (MAINTAINERCLEANFILES): Complete, and rename as...
	(CLEANFILES): this,
	* examples/calc++/local.mk, examples/mfcalc/local.mk,
	* examples/rpcalc/local.mk (CLEANFILES): Add the generated files.

2012-03-13  Akim Demaille  <demaille@gostai.com>

2012-03-09  Akim Demaille  <demaille@gostai.com>

tests: be robust to POSIXLY_CORRECT being defined.
	* tests/local.at (AT_BISON_CHECK_NO_XML): Check if
	POSIXLY_CORRECT is defined, not if it is defined to 1.
	Reported by Lie Yan.
	http://lists.gnu.org/archive/html/bug-bison/2012-03/msg00000.html

2012-03-09  Akim Demaille  <demaille@gostai.com>

tests: be robust to quote style.
	See <http://lists.gnu.org/archive/html/bug-bison/2012-01/msg00120.html>.

* src/main.c (main): Define the quoting style we use.
	* tests/atlocal.in: Use ASCII style quotes during the tests.

2012-03-09  Akim Demaille  <demaille@gostai.com>

maint: update gnulib.
	* gnulib: update.
	* src/scan-gram.l: Don't use the (former version of) STREQ.

2012-03-09  Akim Demaille  <demaille@gostai.com>

tests: remove quote magic from the bison test wrapper.
	Basically, revert 4c4d35394d1bdb4dc3392482ab002bc111a3378f.

* tests/bison.in: Leave bison's stderr as is.

2012-03-09  Akim Demaille  <demaille@gostai.com>

tests: be robust to quote style.
	See <http://lists.gnu.org/archive/html/bug-bison/2012-01/msg00120.html>.

* src/main.c (main): Define the quoting style we use.
	* tests/atlocal.in: Use ASCII style quotes during the tests.

2012-03-09  Akim Demaille  <demaille@gostai.com>

avoid direct strncmp calls.
	Before this change, bison would accept either .tab and _tab equivalently,
	whatever the current platform.  Besides, it was not obeying everywhere
	to the possible definition of TAB_EXT to something else than .tab.

For consistency, handle only TAB_EXT (".tab" on non DJGPP platforms).
	Support for "_tab" is neither documented, nor tested.

* src/system.h (STRNCMP_LIT): New.
	From Jim Meyering.
	(STRPREFIX_LIT): New.
	* src/files.c, src/getargs.c: Use it.

2012-03-06  Akim Demaille  <demaille@gostai.com>

2012-02-24  Akim Demaille  <demaille@gostai.com>

build: comment changes.
	* Makefile.am, examples/calc++/local.mk, examples/local.mk,
	* examples/mfcalc/local.mk, examples/rpcalc/local.mk,
	* lib/local.mk, src/local.mk, tests/local.mk:
	Make the copyright licenses more uniform.

2012-02-24  Akim Demaille  <demaille@gostai.com>

build: fix more example extraction issues.
	* Makefile.am (dist_TESTS): New.
	(TESTS, EXTRA_DIST): Run and ship them.
	* examples/calc++/local.mk: examples/calc++/calc++.stamp no longer
	        exists, don't try to ship it.
	(.yy.stamp): New recipe.
	Use it.
	* examples/calc++/local.mk, examples/mfcalc/local.mk,
	* examples/rpcalc/local.mk:
	Don't ship the sources.
	Adjust the CPPFLAGS: there is nothing left in srcdir.
	(MAINTAINERCLEANFILES): Remove, now we are in builddir.
	(TESTS): Rename as...
	(dist_TESTS): this.

2012-02-24  Akim Demaille  <demaille@gostai.com>

maint: fix example extraction issues.
	calc++: don't rely on Automake to compile a C++ parser.

Basically, revert commit 609b3d8096fb0cc1fa4d908b6e1a860ced260bda,
	Automake 1.11.3 is not safe enough for C++ parser.

* examples/calc++/calc++-parser.hh: Remove.
	* examples/calc++/local.mk (examples/calc++/calc++-parser.stamp):
	New.

examples: factor the extractions into a single step

extexi had to be run in the extraction directory.  Now, it can be
	given the files with expected output directory.  This allows to
	use $(*_extracted) variables (before we had to list again their
	members, but limited to their base names).  In turn, this also
	allows fusing the extraction recipes into a single one.

Also, it is currently too hard (or requires too much duplication,
	since Make wants all the occurrences of the files to be prefixed with
	$(srcdir)/, which is something Automake cannot support for *_SOURCES)
	to work in the source tree.  So extract, and compile scanners and parsers
	in the build tree.

* examples/extexi (basename): New.
	(BEGIN): Now "file_wanted" maps base name to extracted file name.
	* examples/calc++/local.mk, examples/mfcalc/local.mk,
	* examples/rpcalc/local.mk: Fuse extraction rules into...
	* examples/local.mk: Here.
	(extract, extracted): New.

2012-02-23  Akim Demaille  <demaille@gostai.com>

maint: use STREQ/STRNEQ.
	* doc/bison.texinfo: Space change.
	* src/system.h (STREQ, STRNEQ): New.
	* src/files.c, src/ielr.c, src/lalr.c, src/muscle-tab.c,
	* src/output.c, src/print.c, src/print_graph.c,
	* src/reader.c, src/scan-skel.l, src/tables.c,
	* src/uniqstr.c:
	Use them.
	* src/scan-gram.l: Do not use streq.h, use system.h's STREQ.
	* cfg.mk: The documentation is an exception.

2012-02-23  Akim Demaille  <demaille@gostai.com>

doc: fix environment issues.
	* doc/bison.texinfo: Do not use @verbatim, in particular when
	we use @group inside.
	Use @quotation instead of @display for frequently asked questions,
	it looks much nicer.

2012-02-23  Akim Demaille  <demaille@gostai.com>

regen.
	* src/parse-gram.h, src/parse-gram.c: regen.

2012-02-23  Akim Demaille  <demaille@gostai.com>

tests: fix regressions.
	Exit status 63 is documented for version-mismatch.
	* bootstrap.conf (gnulib_modules): Remove sysexits.
	* src/system.h (EX_MISMATCH): Define.
	* src/parse-gram.y (version_check): Use it instead of EX_CONFIG.

Missing includes.
	* tests/calc.at, tests/named-refs.at: Include assert.h.

2012-02-22  Akim Demaille  <demaille@gostai.com>

maint: gitignore.
	* examples/mfcalc/.gitignore, examples/rpcalc/.gitignore: Fix.

2012-02-21  Akim Demaille  <demaille@gostai.com>

regen.
	* src/parse-gram.c, src/parse-gram.h: regen.

2012-02-21  Akim Demaille  <demaille@gostai.com>

Missing includes.
	* tests/calc.at, tests/named-refs.at: Include assert.h.

2012-02-21  Akim Demaille  <demaille@gostai.com>

tests: post-process stderr to normalize quotes.
	* tests/bison.in: Save bison's stderr, and convert gettextized
	quotes to plain ASCII.

2012-02-21  Akim Demaille  <demaille@gostai.com>

glr: fix ambiguity reports.
	* tests/glr-regression.at (Ambiguity reports): New.

2012-02-21  Akim Demaille  <demaille@gostai.com>

glr: fix ambiguity reports.
	Fix a regression introduced in commit
	783aa653f4ca70a75919c8516b950494c612cbfe.

* tests/glr-regression.at (Ambiguity reports): New.
	* data/glr.c (yyreportTree): Fix an offset error.

2012-02-19  Akim Demaille  <demaille@gostai.com>

doc: stylistic improvements.
	* doc/bison.texinfo: Prefer "continue" to empty loop bodies.
	Add some @group/@end group to avoid poor page breaks.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address sc_prohibit_doubled_word.
	* data/yacc.c, doc/bison.texinfo: Reword to avoid having to
	disable that check.
	* cfg.mk: No longer skip this test.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address sc_prohibit_always-defined_macros.
	* cfg.mk: No longer skip it, except where EXIT_SUCCESS is used
	as a witness for stdlib.h.
	Skip this test when appropriate.
	* data/yacc.c: Drop a note about why EXIT_SUCCESS is defined here.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address sc_bindtextdomain, sc_program_name and sc_prohibit_HAVE_MBRTOWC.
	* bootstrap.conf (gnulib_modules): Require progname.
	* src/complain.c, src/getargs.c, src/getargs.h, src/main.c: Use it.
	* cfg.mk (exclude): New.
	Use it.
	Skip lib/main.c for bindtextdomain and set_program_name.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: remove stray file.
	* config.hin: Remove.

2012-02-19  Akim Demaille  <demaille@gostai.com>

doc: stylistic improvements.
	* doc/bison.texinfo: Prefer "continue" to empty loop bodies.
	Add some @group/@end group to avoid poor page breaks.

2012-02-19  Akim Demaille  <demaille@gostai.com>

doc: check the rpcalc.
	* doc/bison.texinfo: Tag rpcalc.y snippets.
	Add missing includes.
	(Rpcalc Rules): Don't issue leading tabs.
	Complete an Info menu.
	Use @result.
	* examples/rpcalc/local.mk: New.
	* examples/rpcalc/rpcalc.test: New.
	* examples/local.mk: Use them.
	* examples/mfcalc/mfcalc.test: Remove dup test.
	* examples/test: Disable debug traces.

2012-02-19  Akim Demaille  <demaille@gostai.com>

regen.
	* src/parse-gram.c, src/parse-gram.h: Regen.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address sc_prohibit_doubled_word.
	* data/yacc.c, doc/bison.texinfo: Reword to avoid having to
	disable that check.
	* cfg.mk: No longer skip this test.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: remove stray file.
	* config.hin: Remove.

2012-02-19  Akim Demaille  <demaille@gostai.com>

bitset: fix an incorrect error message.
	* lib/bitset_stats.c: here.
	Reported by Stefano Lattarini.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address some syntax-issues remaining after cherry-picking from master.
	* cfg.mk: Skip bison generated files, 2.5 is generating trailing
	blanks.  This is already fixed in master.
	* tests/conflicts.at, tests/java.at: Fix white space issues.

2012-02-19  Akim Demaille  <demaille@gostai.com>

regen.
	* src/parse-gram.c, src/parse-gram.h: Regen.

2012-02-19  Akim Demaille  <demaille@gostai.com>

bitset: fix an incorrect error message.
	* lib/bitset_stats.c: here.
	Reported by Stefano Lattarini.

2012-02-19  Jim Meyering  <meyering@redhat.com>

maint: reenable sc_m4_quote_check
	* cfg.mk (local-checks-to-skip): Reenable sc_m4_quote_check.
	* m4/dmalloc.m4: Add quotes.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: remove trailing empty lines.
	* cfg.mk: No longer skip sc_prohibit_empty_lines_at_EOF, except
	for parse-gram.h (generated).
	* examples/mfcalc/.gitignore, lib/.gitignore, m4/.gitignore,
	* po/.gitignore, runtime-po/.gitignore: Remove trailing/leading
	empty lines.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: avoid "magic number exit".
	* cfg.mk (local-checks-to-skip): No longer skip it.
	* bootstrap.conf (gnulib_modules): Add sysexits.
	* doc/bison.texinfo, etc/bench.pl.in, src/parse-gram.y,
	* src/system.h, tests/calc.at, tests/named-refs.at: Use assert
	where appropriate instead of "if (...) exit".
	Use symbolic exit status elsewhere.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: fix some syntax-check issues.
	* cfg.mk (local-checks-to-skip): Remove
	sc_prohibit_quotearg_without_use, sc_prohibit_strcmp,
	sc_unmarked_diagnostics, sc_useless_cpp_parens.
	(sc_unmarked_diagnostics): Skip DJGPP.
	* data/yacc.c, src/LR0.c, src/closure.c,
	* src/flex-scanner.h, src/gram.c, src/lalr.c,
	* src/print-xml.c, src/print.c, src/print_graph.c,
	* src/reader.c, src/reduce.c, src/tables.c:
	Don't use parens with cpp's defined.
	Remove useless includes.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: address a couple of syntax-check errors.
	* cfg.mk (local-checks-to-skip): Remove sc_error_message_period
	and sc_error_message_uppercase.
	Address the uncovered issues.
	* po/POTFILES.in: Add missing files.
	* src/symtab.c: Remove useless includes.
	* lib/bitset_stats.c, src/files.c, tests/glr-regression.at: Use
	conformant error messages.

2012-02-19  Akim Demaille  <demaille@gostai.com>

maint: gnulib: upgrade.

2012-02-18  Akim Demaille  <demaille@gostai.com>

maint: regen.
	* src/parse-gram.c, src/parse-gram.h: regen.

2012-02-18  Akim Demaille  <demaille@gostai.com>

maint: gnulib: upgrade.

2012-02-17  Akim Demaille  <demaille@gostai.com>

doc: mfcalc: fix includes.
	* doc/bison.texinfo: math.h is needed early.

2012-02-17  Akim Demaille  <demaille@gostai.com>

examples: factor the test suite.
	* examples/mfcalc/test, examples/calc++/test: Extract the
	common bits into...
	* examples/test: here.
	(cwd): New.
	Use it to avoid a race on the temporary directory.
	Reported by Jim Meyering.
	* examples/mfcalc/test, examples/calc++/test: Rename into...
	* examples/mfcalc/mfcalc.test, examples/calc++/calc++.test: these.
	* examples/calc++/local.mk, examples/mfcalc/local.mk,
	* examples/local.mk: Adjust.

2012-02-17  Akim Demaille  <demaille@gostai.com>

examples: fix the test suites.
	* examples/calc++/test, examples/mfcalc/test (me): Be more
	meaningfull: include the example name.
	(prog): Factor.
	(run): Avoid printf, use echo.
	Add missing parens.
	(cleanup): New.
	Call it on trap.
	Remove the previous "rm" that did the cleanup.
	Move into a private directory to avoid concurrency issues.
	Reported by Jim Meyering.

2012-02-17  Jim Meyering  <meyering@redhat.com>

examples: link mfcalc with -lm for uses of pow, cos, atan, etc.
	* examples/mfcalc/local.mk (examples_mfcalc_mfcalc_LDADD): Define.

2012-02-16  Akim Demaille  <demaille@gostai.com>

mfcalc: extract and exercise.
	* examples/mfcalc/local.mk, examples/mfcalc/test: New,
	based on calc++'s ones.
	* examples/local.mk: Include mfcalc/local.mk.

2012-02-16  Akim Demaille  <demaille@gostai.com>

calc++: factor for other extracted tests.
	* Makefile.am (TESTS, check_PROGRAMS): Initialize here.
	* examples/local.mk (doc, extexi): Define here.
	* examples/calc++/local.mk: Adjust accordingly.
	* configure.ac: Ask for parallel-tests (for the way the logs
	are handled).
	* examples/calc++/test: As a consequence, always be verbose.
	($prog): New.
	(run): Use it.
	Sort the tests in a more natural order (simplest first).

2012-02-16  Akim Demaille  <demaille@gostai.com>

doc: mfcalc: send errors to stderr.
	* doc/bison.texinfo (Mfcalc Lexer): New.
	(Mfcalc Main): Move the definition of main and yyerror here, for
	clarity.
	Let yyerror report on stderr.

2012-02-16  Akim Demaille  <demaille@gostai.com>

doc: fix mfcalc code.
	* doc/bison.texinfo (Multi-function Calc): Add missing includes.
	Fix the rendering of the result: use @result and remove the
	initial tabulation in the actual code.
	Fix stylistic issues: avoid the , operator.
	Add extexi mark-up.
	* examples/extexi: Also support @smallexample.

2012-02-16  Akim Demaille  <demaille@gostai.com>

tests: c++: stylistic changes.
	* tests/c++.at: Don't use void for incoming arguments.
	Prefer cstdlib to stdlib.h.

2012-02-16  Jim Meyering  <meyering@redhat.com>

tests: avoid c++ failure due to lack of getenv decl
	* tests/c++.at (Syntax error as exception): Avoid spurious failure
	at least when compiling with g++-4.7.x due to lack of declaration
	of getenv.  Include <stdlib.h>.

2012-02-15  Akim Demaille  <demaille@gostai.com>

maint: rely on Automake for parsers.
	* Makefile.am (AM_YFLAGS): Automake looks for "-d" alone.
	Move other options in here.
	(BISON): New.
	(YACC): Use it.
	(bison_SOURCES): Now that automake can see `-d' in AM_YFLAGS,
	we can rely on it to compile and ship the parser header
	files.

Based on commit 737406a32c201471699bfa0843d1f432f3ec29ab and
	commit 3d6ca339083c278d907c9f030f4ba6bc5ecb07f2.

2012-02-15  Akim Demaille  <demaille@gostai.com>

maint: trust Automake for parser headers.
	* examples/calc++/local.mk, src/local.mk: Now that automake
	can see `-d' in AM_YFLAGS, we can rely on it to compile
	and ship the parser header files.

2012-02-15  Akim Demaille  <demaille@gostai.com>

maint: help Automake reading Yacc flags.
	* Makefile.am (AM_YFLAGS): Automake looks for "-d" alone.

2012-02-15  Akim Demaille  <demaille@gostai.com>

calc++: rely on Automake.
	Rely on $(YACC) being the bison being built, and let Automake do the
	rest.  It turned out to be much more difficult than anticipated, for
	various reasons, including some bad behavior from Automake 1.11.2
	which (i) generates calc++-parser.h instead of calc++-parser.hh, and
	(ii) leaves an #include "y.tab.h" in the generated parser instead
	of #include "calc++-parser.h".

The authors of Automake appear to be aware of the problem,
	http://lists.gnu.org/archive/html/automake/2011-05/msg00008.html
	so a simple work around will suffice for the time being.

* examples/calc++/y.tab.h, examples/calc++/calc++-parser.hh: New.
	To work around Automake 1.11.2 issues.
	* examples/calc++/local.mk: Remove all the rules for compilation
	with bison, leave them to Automake.
	So provide it with "calc++-parse.yy" as a source file.
	(calc_sources_generated, calc_sources_extracted): Rename as.
	(calc_generated, calc_extracted): these.
	(calc_sources): New.
	Fix them.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: tidy the Makefile a bit.
	* src/local.mk: Put yacc related variables together.
	(AUTOMAKE_OPTIONS): Move to...
	* Makefile.am: here.
	Remove an old Emacs mode request which disables Automake support.
	* src/local.mk (YACC, AM_YFLAGS): Move to...
	* Makefile.am: here, as they will be used by other local.mks.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: de-recurse the handling of examples
	The directory was still using a local Makefile.am because it provides
	"scoped" Make variables: these examples are not meant to use the same
	CPPFLAGS etc.  If we were to use the same -I set, we'd pick up
	gnulib's stdio.h for instance, which we do not want for these simple
	examples.

Yet, as a result, the dependencies are less accurate, there is code
	duplication, etc.  This is especially perceptible when trying to
	extract more examples from the documentation, as will be done in
	forthcoming changes.

In order to make the tuning of CPPFLAGS easier, discard the predefined
	-I from Automake.

* examples/calc++/Makefile.am: Rename as...
	* examples/calc++/local.mk: this.
	Adjust the paths which are now rooted in top_srcdir/top_builddir.
	Handle BISON_CXX_WORKS here, instead of the too crude previous
	approach that completely discarded the whole directory.
	($(BISON)): Remove now useless bouncing recipe.
	(calc___CPPFLAGS): New.
	Stay away from -Ilib.
	* Makefile.am, configure.ac, examples/local.mk,
	* examples/calc++/test: Adjust.

* configure.ac: Pass nostdinc to Automake.
	* src/local.mk, lib/local.mk (AM_CPPFLAGS): Move to...
	* Makefile.am: here.

* src/local.mk, examples/calc++/Makefile.am (BISON, BISON_IN): Factor
	to...
	* Makefile.am: here.
	* tests/local.mk: Use it.

2012-02-14  Akim Demaille  <demaille@gostai.com>

variant: fix the example.
	* examples/variant.yy: Adjust to "assert" being now
	"parse.assert".

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: more authors.
	* AUTHORS: here.
	Suggested by Tys Lefering.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: add license headers.
	* examples/calc++/test, examples/variant.yy, AUTHORS, THANKS,
	* tests/atlocal.in, tests/bison.in: Add license headers.
	Reported by Tys Lefering.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: remove obsolete file.
	* etc/make-ChangeLogs: Remove (used for rcs to cvs migration!).
	Reported by Tys Lefering.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: more authors.
	* AUTHORS: here.
	Suggested by Tys Lefering.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: add license headers.
	* examples/calc++/test, examples/variant.yy, AUTHORS, THANKS,
	* tests/atlocal.in, tests/bison.in: Add license headers.
	Reported by Tys Lefering.

2012-02-14  Akim Demaille  <demaille@gostai.com>

maint: remove obsolete file.
	* etc/make-ChangeLogs: Remove (used for rcs to cvs migration!).
	Reported by Tys Lefering.

2012-02-10  Akim Demaille  <demaille@gostai.com>

lalr1.cc: also handle syntax_error when calling yylex.
	* data/lalr1.cc (parse): Catch syntax_error around yylex and
	forward them to errlab1.
	* tests/c++.at (Syntax error as exception): Check support for
	syntax exceptions raised by the scanner.
	* NEWS, doc/bison.texinfo: Document it.

2012-02-10  Akim Demaille  <demaille@gostai.com>

tests: lalr1.cc: check syntax_error.
	* tests/c++.at (Syntax error as exception): New.

2012-02-10  Akim Demaille  <demaille@gostai.com>

tests: don't require locations uselessly.
	* tests/c++.at (Syntax error discarding no lookahead): Contrary to
	2.5, C++ parsers can work without locations.

2012-02-10  Akim Demaille  <demaille@gostai.com>

maint: more silent rules.
	* tests/local.mk (TESTSUITE_AT): Include plackage.m4.
	Adjust dependencies.
	Make testsuite.at its first argument.
	(package.m4): Be silent.
	(testsuite): Be silent.
	Use $<.

2012-02-10  Akim Demaille  <demaille@gostai.com>

skeletons: simplify the protections against "unused" warnings.
	* data/c.m4 (b4_parse_param_use): Also accept optional arguments
	to "use".
	Simplify callers.
	* data/glr.c (yyuserAction): Simplify use of b4_parse_param_use.
	(yy_reduce_print): Don't use b4_parse_param_use, as all the arguments
	_are_ used.
	* data/lalr1.cc (YY_SYMBOL_PRINT): Even when disabled, "use" the
	symbol argument.
	This neutralizes a warning in yypush_ when there are no symbols
	with a semantic values.
	(yy_destroy_): Remove useless "use" of yymsg.

2012-02-10  Akim Demaille  <demaille@gostai.com>

glr: formatting changes.
	* data/glr.c: Split long strings.

2012-02-08  Akim Demaille  <demaille@gostai.com>

use a more consistent quoting style.
	See <http://lists.gnu.org/archive/html/bug-bison/2012-01/msg00120.html>.
	Use quotearg as often as possible instead of leaving the choice of
	the quotes to the translators.  Use shorter messages.  Factor similar
	messages to a single format, to make localization easier.

* src/files.c, src/getargs.c, src/muscle-tab.c, src/reader.c
	* src/scan-code.l, src/scan-gram.l, src/symtab.c:
	Use quote() or quotearg_colon() on printf arguments instead of
	quotes in the format string.
	* data/bison.m4: Keep sync with the changes in muscle-tab.c.

* tests/skeletons.at, tests/input.at, tests/regression.at: Adjust
	expected messages.

2012-02-08  Akim Demaille  <demaille@gostai.com>

* tests/skeletons.at, tests/input.at, tests/regression.at: Adjust
	expected messages.

2012-01-31  Jim Meyering  <meyering@redhat.com>

maint: reenable sc_m4_quote_check
	* cfg.mk (local-checks-to-skip): Reenable sc_m4_quote_check.
	* m4/dmalloc.m4: Add quotes.

2012-01-31  Jim Meyering  <meyering@redhat.com>

maint: force "make syntax-check" to pass by skipping failing tests
	* cfg.mk (local-checks-to-skip): Skip all currently-failing tests.
	Remove changelog-check; it's long gone.

2012-01-31  Akim Demaille  <demaille@gostai.com>

maint: remove stray debug code.
	* src/Makefile.am (echo): Remove.

2012-01-31  Akim Demaille  <demaille@gostai.com>

maint: space changes.
	* src/Makefile.am: Use 2 leading spaces for variable definition
	spreading over several lines.

2012-01-31  Akim Demaille  <demaille@gostai.com>

maint: more silent-rules.
	* doc/local.mk, src/local.mk, examples/calc++/Makefile.am: Use
	$(AM_V_GEN) and $(AM_V_at) where appropriate.

2012-01-31  Jim Meyering  <meyering@redhat.com>

do not ignore errors like ENOSPC,EIO when writing to stdout
	Standard output was never explicitly closed, so we could not
	detect failure.  Thus, bison would ignore the errors of writing
	to a full file system and getting an I/O error on write, but only
	for standard output, e.g., for --print-localedir, --print-datadir,
	--help and some verbose output.
	Now, "bison --print-datadir > /dev/full" reports the write failure:
	bison: write error: No space left on device
	Before, it would exit 0 with no diagnostic, implying success.
	This is not an issue for "--output=-" or the other FILE-accepting
	command-line options, because unlike most other GNU programs,
	an output file argument of "-" is treated as the literal "./-",
	rather than standard output.
	* bootstrap.conf (gnulib_modules): Add closeout.
	* src/main.c: Include "closeout.h".
	Use atexit to ensure we close stdout.
	* .gitignore: Ignore new files pulled in via gnulib-tool.

2012-01-31  Akim Demaille  <demaille@gostai.com>

maint: more silent-rules.
	* doc/local.mk, src/local.mk, examples/calc++/Makefile.am: Use
	$(AM_V_GEN) and $(AM_V_at) where appropriate.

2012-01-29  Jim Meyering  <meyering@redhat.com>

2012-01-26  Akim Demaille  <demaille@gostai.com>

tests: fix expected output.
	* tests/actions.at (YYBACKUP): here.

2012-01-26  Akim Demaille  <demaille@gostai.com>

tests: fix expected output.
	* tests/actions.at (YYBACKUP): here.

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: fix configure.ac
	Fix commit 1890a2a816dab86c23cc1d0af8fac3986335deb7.

* configure.ac: Fix variable assignment.

2012-01-26  Akim Demaille  <demaille@gostai.com>

yacc: fix YYBACKUP.
	Reported by David Kastrup:
	https://lists.gnu.org/archive/html/bug-bison/2011-10/msg00002.html.

* data/yacc.c (YYBACKUP): Accept rhs size.
	Restore the proper state value.
	* TODO (YYBACKUP): Make it...
	* tests/actions.at: a new test case.
	* NEWS, THANKS: Update.

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: update TODO.
	* TODO (Labeling the symbols): Remove, it's done ("Name references").

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: update THANKS.
	* THANKS: Update Tys's address, on his request.

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: fix --gcc-warnings support.
	* configure.ac: Use enable_gcc_warnings instead of enableval,
	which is valid only with AC_ARG_ENABLE.

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: silent-rules.
	* configure.ac: Ask for silent-rules support.
	Enable it by default.

2012-01-26  Akim Demaille  <demaille@gostai.com>

maint: remove trailing blanks.
	* src/scan-code.l: Here.

2012-01-26  Akim Demaille  <demaille@gostai.com>

yacc: fix YYBACKUP.
	Reported by David Kastrup:
	https://lists.gnu.org/archive/html/bug-bison/2011-10/msg00002.html.

* data/yacc.c (YYBACKUP): Accept rhs size.
	Restore the proper state value.
	* TODO (YYBACKUP): Make it...
	* tests/actions.at: a new test case.
	* NEWS, THANKS: Update.

2012-01-25  Akim Demaille  <demaille@gostai.com>

maint: update TODO.
	* TODO (Labeling the symbols): Remove, it's done ("Name references").

2012-01-25  Akim Demaille  <demaille@gostai.com>

maint: update THANKS.
	* THANKS: Update Tys's address, on his request.

2012-01-25  Akim Demaille  <demaille@gostai.com>

maint: fix --gcc-warnings support.
	* configure.ac: Use enable_gcc_warnings instead of enableval,
	which is valid only with AC_ARG_ENABLE.

2012-01-25  Akim Demaille  <demaille@gostai.com>

maint: silent-rules.
	* configure.ac: Ask for silent-rules support.
	Enable it by default.

2012-01-25  Paul Eggert  <eggert@cs.ucla.edu>

tests: port to Solaris 10 'diff -u'
	* tests/regression.at (parse-gram.y: LALR = IELR): Port to Solaris 10,
	where "diff -u X X" outputs "No differences encountered"
	instead of outputting nothing.  Reported by Tomohiro Suzuki in
	<http://lists.gnu.org/archive/html/bug-bison/2012-01/msg00101.html>.

2012-01-25  Jim Meyering  <meyering@redhat.com>

build: avoid possibly-replaced fprintf in liby-source, yyerror.c
	* lib/yyerror.c (yyerror): Use fputs and fputc rather than fprintf
	with a mere "%s\n" format.  Always return 0 now, on the assumption
	that the return value was never used anyway.
	Don't include <config.h> after all.  This avoids a problem
	reported by Thiru Ramakrishnan in
	http://lists.gnu.org/archive/html/help-bison/2011-11/msg00000.html
	* cfg.mk: Exempt lib/yyerror.c from the sc_require_config_h_first test.
	* THANKS: Update.

2012-01-24  Paul Eggert  <eggert@cs.ucla.edu>

2012-01-24  Jim Meyering  <meyering@redhat.com>

maint: generate ChangeLog from git log
	* Makefile.am (gen-ChangeLog): New rule.
	(dist-hook): Depend on it.
	(EXTRA_DIST): Distribute the two ChangeLog-* files.
	* bootstrap.conf (gnulib_modules): Add gitlog-to-changelog.
	(bootstrap_post_import_hook): Ensure that ChangeLog exists.
	* build-aux/git-log-fix: New file.
	* ChangeLog-2012: Renamed ...
	* ChangeLog: ... from this.
	* ChangeLog-1998: Renamed ...
	* OChangeLog: ...from this
	* .gitignore: Add ChangeLog.

2012-01-24  Jim Meyering  <meyering@redhat.com>

change more quotes in source, and adjust tests to match
	Run this command to change each `%s' to '%s' in source directories:
	  git grep -l '`%s'\' src djgpp data \
	    |xargs perl -pi -e '$q="'\''";s/`%s$q/$q%s$q/g'
	* data/bison.m4: Affected per the above.
	* djgpp/subpipe.c: Likewise.
	* src/files.c: Likewise.
	* src/getargs.c: Likewise.
	* src/muscle-tab.c: Likewise.
	* src/reader.c: Likewise.
	* tests/glr-regression.at: Adjust to match.
	* tests/input.at: Likewise.
	* tests/push.at: Likewise.
	* tests/skeletons.at: Likewise.

2012-01-23  Jim Meyering  <meyering@redhat.com>

quote consistently and make tests pass with new quoting from gnulib
	Updating to gnulib pulled in new quote and quotarg modules,
	by which quoting is now done like 'this' rather than `this'.
	That change induces many "make check" test failures.  This change
	adapts code and tests so that "make check" passes once again.
	* src/scan-code.l: Quote like 'this', not like `this'.
	* src/scan-gram.l: Likewise.
	* src/symtab.c: Likewise.
	* tests/actions.at: Adjust tests to match.
	* tests/input.at: Likewise.
	* tests/named-refs.at: Likewise.
	* tests/output.at: Likewise.
	* tests/regression.at: Likewise.
	* lib/.gitignore: Regenerate.
	* m4/.gitignore: Likewise.

2012-01-23  Jim Meyering  <meyering@redhat.com>

build: update gnulib and autoconf submodules to latest (cherry picked from commit 728415f885e5cb8e518c8576fa6e1f541e384130)

2012-01-23  Jim Meyering  <meyering@redhat.com>

build: manually update bootstrap from gnulib, and adapt
	Updating to the latest bootstrap from gnulib involves more of a
	change than usual, and updating to the latest gnulib would involve
	its own set of challenges with the upcoming quoting changes, so
	we update bootstrap manually and separately.
	* bootstrap: Update from gnulib.
	* lib/Makefile.am: Initialize more variables to empty, so that gnulib.mk
	can append to them with "+=".
	* bootstrap.conf (gnulib_mk_hook): Remove.  No longer honored.
	(gnulib_tool_option_extras): Generate gnulib.mk.

2012-01-23  Jim Meyering  <meyering@redhat.com>

maint: include <config.h> first
	* cfg.mk (exclude_file_name_regexp--sc_require_config_h_first):
	Exempt data/glr.c and data/yacc.c from the include-config.h-first
	requirement.

2012-01-23  Jim Meyering  <meyering@redhat.com>

build: include <config.h> from lib/yyerror.c
	* lib/yyerror.c: Include <config.h>.

2012-01-23  Jim Meyering  <meyering@redhat.com>

maint: list djgpp/subpipe.c in po/POTFILES.in
	* po/POTFILES.in: Add djgpp/subpipe.c.

2012-01-23  Jim Meyering  <meyering@redhat.com>

maint: placate the space-TAB syntax-check
	* cfg.mk (exclude_file_name_regexp--sc_space_tab): Exempt
	tests/input.at and tests/c++.at, since they appear to use
	SP-TAB sequences deliberately.
	* OChangeLog: Remove space-before-TAB.

2012-01-23  Jim Meyering  <meyering@redhat.com>

doc: correct typo: s/can not/cannot/
	* doc/bison.texinfo (Bug Reports): s/can not/cannot/
	And remove trailing blanks.

2012-01-23  Jim Meyering  <meyering@redhat.com>

build: generalize etc/prefix-gnulib-mk
	This script hard-coded "libbison" and lib/gnulib.mk.
	Adjust the script to require a --lib-name=$gnulib_name option
	and a FILE argument like lib/$gnulib_mk.
	Also add support for --help and --version.
	* etc/prefix-gnulib-mk: Generalize.
	* bootstrap.conf (bootstrap_post_import_hook): Update its invocation.

2012-01-22  Jim Meyering  <meyering@redhat.com>

maint: get gpl-3.0 from gnulib
	* bootstrap.conf (gnulib_modules): Add gpl-3.0.
	* doc/gpl-3.0.texi: Remove from version control, now that
	we get it via gnulib.
	* doc/.gitignore: Ignore it.

2012-01-20  Akim Demaille  <demaille@gostai.com>

maint: be more robust to gnulib's FOO_H variables.
	* configure.ac: Instead of listing gnulib's variables, look for
	them among AC_SUBST variables.

2012-01-20  Jim Meyering  <meyering@redhat.com>

2012-01-19  Jim Meyering  <meyering@redhat.com>

build: update gnulib and autoconf submodules to latest

2012-01-19  Jim Meyering  <meyering@redhat.com>

build: manually update bootstrap from gnulib, and adapt
	Updating to the latest bootstrap from gnulib involves more of a
	change than usual, and updating to the latest gnulib would involve
	its own set of challenges with the upcoming quoting changes, so
	we update bootstrap manually and separately.
	* bootstrap: Update from gnulib.
	* Makefile.am: Initialize more variables to empty, so that gnulib.mk
	can append to them with "+=".
	* bootstrap.conf (gnulib_mk_hook): Remove.  No longer honored.
	(bootstrap_post_import_hook): Instead, run the same command,
	etc/prefix-gnulib-mk lib/$gnulib_mk, via slightly different API.
	Temporarily disable "bootstrap_sync=true".
	* etc/prefix-gnulib-mk: Don't prepend "lib/" to tokens like -I$(...
	or "\".

2012-01-19  Jim Meyering  <meyering@redhat.com>

maint: include <config.h> first
	* cfg.mk (exclude_file_name_regexp--sc_require_config_h_first):
	Exempt data/glr.c and data/yacc.c from the include-config.h-first
	requirement.

2012-01-19  Jim Meyering  <meyering@redhat.com>

build: include <config.h> from lib/yyerror.c
	* lib/yyerror.c: Include <config.h>.

2012-01-19  Jim Meyering  <meyering@redhat.com>

maint: list djgpp/subpipe.c in po/POTFILES.in
	* po/POTFILES.in: Add djgpp/subpipe.c.

2012-01-19  Jim Meyering  <meyering@redhat.com>

maint: remove final trailing space
	* src/scan-gram.l (%): Remove single space at end of line.

2012-01-19  Jim Meyering  <meyering@redhat.com>

maint: get gpl-3.0 from gnulib
	* bootstrap.conf (gnulib_modules): Add gpl-3.0.
	* doc/gpl-3.0.texi: Remove from version control, now that
	we get it via gnulib.
	* doc/.gitignore: Ignore it.

2012-01-19  Jim Meyering  <meyering@redhat.com>

doc: correct typo: s/can not/cannot/
	* doc/bison.texinfo (Bug Reports): s/can not/cannot/
	And remove trailing blanks.
PK��������\�V$.������NEWSnu��[�����������GNU Bison NEWS

* Noteworthy changes in release 3.0.4 (2015-01-23) [stable]

** Bug fixes

*** C++ with Variants (lalr1.cc)

Fix a compiler warning when no %destructor use $$.

*** Test suites

Several portability issues in tests were fixed.

* Noteworthy changes in release 3.0.3 (2015-01-15) [stable]

** Bug fixes

*** C++ with Variants (lalr1.cc)

Problems with %destructor and '%define parse.assert' have been fixed.

*** Named %union support (yacc.c, glr.c)

Bison 3.0 introduced a regression on named %union such as

%union foo { int ival; };

The possibility to use a name was introduced "for Yacc compatibility".
  It is however not required by POSIX Yacc, and its usefulness is not clear.

*** %define api.value.type union with %defines (yacc.c, glr.c)

The C parsers were broken when %defines was used together with "%define
  api.value.type union".

*** Redeclarations are reported in proper order

%token FOO "foo"
    %printer {} "foo"
    %printer {} FOO

bison used to report:

/tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
     %printer {} "foo"
              ^^
    /tmp/foo.yy:3.10-11:     previous declaration
     %printer {} FOO
              ^^

Now, the "previous" declaration is always the first one.

** Documentation

Bison now installs various files in its docdir (which defaults to
  '/usr/local/share/doc/bison'), including the three fully blown examples
  extracted from the documentation:

- rpcalc
     Reverse polish calculator, a simple introductory example.
   - mfcalc
     Multi-function Calc, a calculator with memory and functions and located
     error messages.
   - calc++
     a calculator in C++ using variant support and token constructors.

* Noteworthy changes in release 3.0.2 (2013-12-05) [stable]

** Bug fixes

*** Generated source files when errors are reported

When warnings are issued and -Werror is set, bison would still generate
  the source files (*.c, *.h...).  As a consequence, some runs of "make"
  could fail the first time, but not the second (as the files were generated
  anyway).

This is fixed: bison no longer generates this source files, but, of
  course, still produces the various reports (*.output, *.xml, etc.).

*** %empty is used in reports

Empty right-hand sides are denoted by '%empty' in all the reports (text,
  dot, XML and formats derived from it).

*** YYERROR and variants

When C++ variant support is enabled, an error triggered via YYERROR, but
  not caught via error recovery, resulted in a double deletion.

* Noteworthy changes in release 3.0.1 (2013-11-12) [stable]

** Bug fixes

*** Errors in caret diagnostics

On some platforms, some errors could result in endless diagnostics.

*** Fixes of the -Werror option

Options such as "-Werror -Wno-error=foo" were still turning "foo"
  diagnostics into errors instead of warnings.  This is fixed.

Actually, for consistency with GCC, "-Wno-error=foo -Werror" now also
  leaves "foo" diagnostics as warnings.  Similarly, with "-Werror=foo
  -Wno-error", "foo" diagnostics are now errors.

*** GLR Predicates

As demonstrated in the documentation, one can now leave spaces between
  "%?" and its "{".

*** Installation

The yacc.1 man page is no longer installed if --disable-yacc was
  specified.

*** Fixes in the test suite

Bugs and portability issues.

* Noteworthy changes in release 3.0 (2013-07-25) [stable]

** WARNING: Future backward-incompatibilities!

Like other GNU packages, Bison will start using some of the C99 features
  for its own code, especially the definition of variables after statements.
  The generated C parsers still aim at C90.

** Backward incompatible changes

*** Obsolete features

Support for YYFAIL is removed (deprecated in Bison 2.4.2): use YYERROR.

Support for yystype and yyltype is removed (deprecated in Bison 1.875):
  use YYSTYPE and YYLTYPE.

Support for YYLEX_PARAM and YYPARSE_PARAM is removed (deprecated in Bison
  1.875): use %lex-param, %parse-param, or %param.

Missing semicolons at the end of actions are no longer added (as announced
  in the release 2.5).

*** Use of YACC='bison -y'

TL;DR: With Autoconf <= 2.69, pass -Wno-yacc to (AM_)YFLAGS if you use
  Bison extensions.

Traditional Yacc generates 'y.tab.c' whatever the name of the input file.
  Therefore Makefiles written for Yacc expect 'y.tab.c' (and possibly
  'y.tab.h' and 'y.outout') to be generated from 'foo.y'.

To this end, for ages, AC_PROG_YACC, Autoconf's macro to look for an
  implementation of Yacc, was using Bison as 'bison -y'.  While it does
  ensure compatible output file names, it also enables warnings for
  incompatibilities with POSIX Yacc.  In other words, 'bison -y' triggers
  warnings for Bison extensions.

Autoconf 2.70+ fixes this incompatibility by using YACC='bison -o y.tab.c'
  (which also generates 'y.tab.h' and 'y.output' when needed).
  Alternatively, disable Yacc warnings by passing '-Wno-yacc' to your Yacc
  flags (YFLAGS, or AM_YFLAGS with Automake).

** Bug fixes

*** The epilogue is no longer affected by internal #defines (glr.c)

The glr.c skeleton uses defines such as #define yylval (yystackp->yyval) in
  generated code.  These weren't properly undefined before the inclusion of
  the user epilogue, so functions such as the following were butchered by the
  preprocessor expansion:

int yylex (YYSTYPE *yylval);

This is fixed: yylval, yynerrs, yychar, and yylloc are now valid
  identifiers for user-provided variables.

*** stdio.h is no longer needed when locations are enabled (yacc.c)

Changes in Bison 2.7 introduced a dependency on FILE and fprintf when
  locations are enabled.  This is fixed.

*** Warnings about useless %pure-parser/%define api.pure are restored

** Diagnostics reported by Bison

Most of these features were contributed by Théophile Ranquet and Victor
  Santet.

*** Carets

Version 2.7 introduced caret errors, for a prettier output.  These are now
  activated by default.  The old format can still be used by invoking Bison
  with -fno-caret (or -fnone).

Some error messages that reproduced excerpts of the grammar are now using
  the caret information only.  For instance on:

%%
    exp: 'a' | 'a';

Bison 2.7 reports:

in.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
    in.y:2.12-14: warning: rule useless in parser due to conflicts: exp: 'a' [-Wother]

Now bison reports:

in.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
    in.y:2.12-14: warning: rule useless in parser due to conflicts [-Wother]
     exp: 'a' | 'a';
                ^^^

and "bison -fno-caret" reports:

in.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
    in.y:2.12-14: warning: rule useless in parser due to conflicts [-Wother]

*** Enhancements of the -Werror option

The -Werror=CATEGORY option is now recognized, and will treat specified
  warnings as errors. The warnings need not have been explicitly activated
  using the -W option, this is similar to what GCC 4.7 does.

For example, given the following command line, Bison will treat both
  warnings related to POSIX Yacc incompatibilities and S/R conflicts as
  errors (and only those):

$ bison -Werror=yacc,error=conflicts-sr input.y

If no categories are specified, -Werror will make all active warnings into
  errors. For example, the following line does the same the previous example:

$ bison -Werror -Wnone -Wyacc -Wconflicts-sr input.y

(By default -Wconflicts-sr,conflicts-rr,deprecated,other is enabled.)

Note that the categories in this -Werror option may not be prefixed with
  "no-". However, -Wno-error[=CATEGORY] is valid.

Note that -y enables -Werror=yacc. Therefore it is now possible to require
  Yacc-like behavior (e.g., always generate y.tab.c), but to report
  incompatibilities as warnings: "-y -Wno-error=yacc".

*** The display of warnings is now richer

The option that controls a given warning is now displayed:

foo.y:4.6: warning: type clash on default action: <foo> != <bar> [-Wother]

In the case of warnings treated as errors, the prefix is changed from
  "warning: " to "error: ", and the suffix is displayed, in a manner similar
  to GCC, as [-Werror=CATEGORY].

For instance, where the previous version of Bison would report (and exit
  with failure):

bison: warnings being treated as errors
    input.y:1.1: warning: stray ',' treated as white space

it now reports:

input.y:1.1: error: stray ',' treated as white space [-Werror=other]

*** Deprecated constructs

The new 'deprecated' warning category flags obsolete constructs whose
  support will be discontinued.  It is enabled by default.  These warnings
  used to be reported as 'other' warnings.

*** Useless semantic types

Bison now warns about useless (uninhabited) semantic types.  Since
  semantic types are not declared to Bison (they are defined in the opaque
  %union structure), it is %printer/%destructor directives about useless
  types that trigger the warning:

%token <type1> term
    %type  <type2> nterm
    %printer    {} <type1> <type3>
    %destructor {} <type2> <type4>
    %%
    nterm: term { $$ = $1; };

3.28-34: warning: type <type3> is used, but is not associated to any symbol
    4.28-34: warning: type <type4> is used, but is not associated to any symbol

*** Undefined but unused symbols

Bison used to raise an error for undefined symbols that are not used in
  the grammar.  This is now only a warning.

%printer    {} symbol1
    %destructor {} symbol2
    %type <type>   symbol3
    %%
    exp: "a";

*** Useless destructors or printers

Bison now warns about useless destructors or printers.  In the following
  example, the printer for <type1>, and the destructor for <type2> are
  useless: all symbols of <type1> (token1) already have a printer, and all
  symbols of type <type2> (token2) already have a destructor.

%token <type1> token1
           <type2> token2
           <type3> token3
           <type4> token4
    %printer    {} token1 <type1> <type3>
    %destructor {} token2 <type2> <type4>

*** Conflicts

The warnings and error messages about shift/reduce and reduce/reduce
  conflicts have been normalized.  For instance on the following foo.y file:

%glr-parser
    %%
    exp: exp '+' exp | '0' | '0';

compare the previous version of bison:

$ bison foo.y
    foo.y: conflicts: 1 shift/reduce, 2 reduce/reduce
    $ bison -Werror foo.y
    bison: warnings being treated as errors
    foo.y: conflicts: 1 shift/reduce, 2 reduce/reduce

with the new behavior:

$ bison foo.y
    foo.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
    foo.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr]
    $ bison -Werror foo.y
    foo.y: error: 1 shift/reduce conflict [-Werror=conflicts-sr]
    foo.y: error: 2 reduce/reduce conflicts [-Werror=conflicts-rr]

When %expect or %expect-rr is used, such as with bar.y:

%expect 0
    %glr-parser
    %%
    exp: exp '+' exp | '0' | '0';

Former behavior:

$ bison bar.y
    bar.y: conflicts: 1 shift/reduce, 2 reduce/reduce
    bar.y: expected 0 shift/reduce conflicts
    bar.y: expected 0 reduce/reduce conflicts

New one:

$ bison bar.y
    bar.y: error: shift/reduce conflicts: 1 found, 0 expected
    bar.y: error: reduce/reduce conflicts: 2 found, 0 expected

** Incompatibilities with POSIX Yacc

The 'yacc' category is no longer part of '-Wall', enable it explicitly
  with '-Wyacc'.

** Additional yylex/yyparse arguments

The new directive %param declares additional arguments to both yylex and
  yyparse.  The %lex-param, %parse-param, and %param directives support one
  or more arguments.  Instead of

%lex-param   {arg1_type *arg1}
    %lex-param   {arg2_type *arg2}
    %parse-param {arg1_type *arg1}
    %parse-param {arg2_type *arg2}

one may now declare

%param {arg1_type *arg1} {arg2_type *arg2}

** Types of values for %define variables

Bison used to make no difference between '%define foo bar' and '%define
  foo "bar"'.  The former is now called a 'keyword value', and the latter a
  'string value'.  A third kind was added: 'code values', such as '%define
  foo {bar}'.

Keyword variables are used for fixed value sets, e.g.,

%define lr.type lalr

Code variables are used for value in the target language, e.g.,

%define api.value.type {struct semantic_type}

String variables are used remaining cases, e.g. file names.

** Variable api.token.prefix

The variable api.token.prefix changes the way tokens are identified in
  the generated files.  This is especially useful to avoid collisions
  with identifiers in the target language.  For instance

%token FILE for ERROR
    %define api.token.prefix {TOK_}
    %%
    start: FILE for ERROR;

will generate the definition of the symbols TOK_FILE, TOK_for, and
  TOK_ERROR in the generated sources.  In particular, the scanner must
  use these prefixed token names, although the grammar itself still
  uses the short names (as in the sample rule given above).

** Variable api.value.type

This new %define variable supersedes the #define macro YYSTYPE.  The use
  of YYSTYPE is discouraged.  In particular, #defining YYSTYPE *and* either
  using %union or %defining api.value.type results in undefined behavior.

Either define api.value.type, or use "%union":

%union
    {
      int ival;
      char *sval;
    }
    %token <ival> INT "integer"
    %token <sval> STRING "string"
    %printer { fprintf (yyo, "%d", $$); } <ival>
    %destructor { free ($$); } <sval>

/* In yylex().  */
    yylval.ival = 42; return INT;
    yylval.sval = "42"; return STRING;

The %define variable api.value.type supports both keyword and code values.

The keyword value 'union' means that the user provides genuine types, not
  union member names such as "ival" and "sval" above (WARNING: will fail if
  -y/--yacc/%yacc is enabled).

%define api.value.type union
    %token <int> INT "integer"
    %token <char *> STRING "string"
    %printer { fprintf (yyo, "%d", $$); } <int>
    %destructor { free ($$); } <char *>

/* In yylex().  */
    yylval.INT = 42; return INT;
    yylval.STRING = "42"; return STRING;

The keyword value variant is somewhat equivalent, but for C++ special
  provision is made to allow classes to be used (more about this below).

%define api.value.type variant
    %token <int> INT "integer"
    %token <std::string> STRING "string"

Code values (in braces) denote user defined types.  This is where YYSTYPE
  used to be used.

%code requires
    {
      struct my_value
      {
        enum
        {
          is_int, is_string
        } kind;
        union
        {
          int ival;
          char *sval;
        } u;
      };
    }
    %define api.value.type {struct my_value}
    %token <u.ival> INT "integer"
    %token <u.sval> STRING "string"
    %printer { fprintf (yyo, "%d", $$); } <u.ival>
    %destructor { free ($$); } <u.sval>

/* In yylex().  */
    yylval.u.ival = 42; return INT;
    yylval.u.sval = "42"; return STRING;

** Variable parse.error

This variable controls the verbosity of error messages.  The use of the
  %error-verbose directive is deprecated in favor of "%define parse.error
  verbose".

** Renamed %define variables

The following variables have been renamed for consistency.  Backward
  compatibility is ensured, but upgrading is recommended.

lr.default-reductions      -> lr.default-reduction
    lr.keep-unreachable-states -> lr.keep-unreachable-state
    namespace                  -> api.namespace
    stype                      -> api.value.type

** Semantic predicates

Contributed by Paul Hilfinger.

The new, experimental, semantic-predicate feature allows actions of the
  form "%?{ BOOLEAN-EXPRESSION }", which cause syntax errors (as for
  YYERROR) if the expression evaluates to 0, and are evaluated immediately
  in GLR parsers, rather than being deferred.  The result is that they allow
  the programmer to prune possible parses based on the values of run-time
  expressions.

** The directive %expect-rr is now an error in non GLR mode

It used to be an error only if used in non GLR mode, _and_ if there are
  reduce/reduce conflicts.

** Tokens are numbered in their order of appearance

Contributed by Valentin Tolmer.

With '%token A B', A had a number less than the one of B.  However,
  precedence declarations used to generate a reversed order.  This is now
  fixed, and introducing tokens with any of %token, %left, %right,
  %precedence, or %nonassoc yields the same result.

When mixing declarations of tokens with a litteral character (e.g., 'a')
  or with an identifier (e.g., B) in a precedence declaration, Bison
  numbered the litteral characters first.  For example

%right A B 'c' 'd'

would lead to the tokens declared in this order: 'c' 'd' A B.  Again, the
  input order is now preserved.

These changes were made so that one can remove useless precedence and
  associativity declarations (i.e., map %nonassoc, %left or %right to
  %precedence, or to %token) and get exactly the same output.

** Useless precedence and associativity

Contributed by Valentin Tolmer.

When developing and maintaining a grammar, useless associativity and
  precedence directives are common.  They can be a nuisance: new ambiguities
  arising are sometimes masked because their conflicts are resolved due to
  the extra precedence or associativity information.  Furthermore, it can
  hinder the comprehension of a new grammar: one will wonder about the role
  of a precedence, where in fact it is useless.  The following changes aim
  at detecting and reporting these extra directives.

*** Precedence warning category

A new category of warning, -Wprecedence, was introduced. It flags the
  useless precedence and associativity directives.

*** Useless associativity

Bison now warns about symbols with a declared associativity that is never
  used to resolve conflicts.  In that case, using %precedence is sufficient;
  the parsing tables will remain unchanged.  Solving these warnings may raise
  useless precedence warnings, as the symbols no longer have associativity.
  For example:

%left '+'
    %left '*'
    %%
    exp:
      "number"
    | exp '+' "number"
    | exp '*' exp
    ;

will produce a

warning: useless associativity for '+', use %precedence [-Wprecedence]
     %left '+'
           ^^^

*** Useless precedence

Bison now warns about symbols with a declared precedence and no declared
  associativity (i.e., declared with %precedence), and whose precedence is
  never used.  In that case, the symbol can be safely declared with %token
  instead, without modifying the parsing tables.  For example:

%precedence '='
    %%
    exp: "var" '=' "number";

will produce a

warning: useless precedence for '=' [-Wprecedence]
     %precedence '='
                 ^^^

*** Useless precedence and associativity

In case of both useless precedence and associativity, the issue is flagged
  as follows:

%nonassoc '='
    %%
    exp: "var" '=' "number";

The warning is:

warning: useless precedence and associativity for '=' [-Wprecedence]
     %nonassoc '='
               ^^^

** Empty rules

With help from Joel E. Denny and Gabriel Rassoul.

Empty rules (i.e., with an empty right-hand side) can now be explicitly
  marked by the new %empty directive.  Using %empty on a non-empty rule is
  an error.  The new -Wempty-rule warning reports empty rules without
  %empty.  On the following grammar:

%%
    s: a b c;
    a: ;
    b: %empty;
    c: 'a' %empty;

bison reports:

3.4-5: warning: empty rule without %empty [-Wempty-rule]
     a: {}
        ^^
    5.8-13: error: %empty on non-empty rule
     c: 'a' %empty {};
            ^^^^^^

** Java skeleton improvements

The constants for token names were moved to the Lexer interface.  Also, it
  is possible to add code to the parser's constructors using "%code init"
  and "%define init_throws".
  Contributed by Paolo Bonzini.

The Java skeleton now supports push parsing.
  Contributed by Dennis Heimbigner.

** C++ skeletons improvements

*** The parser header is no longer mandatory (lalr1.cc, glr.cc)

Using %defines is now optional.  Without it, the needed support classes
  are defined in the generated parser, instead of additional files (such as
  location.hh, position.hh and stack.hh).

*** Locations are no longer mandatory (lalr1.cc, glr.cc)

Both lalr1.cc and glr.cc no longer require %location.

*** syntax_error exception (lalr1.cc)

The C++ parser features a syntax_error exception, which can be
  thrown from the scanner or from user rules to raise syntax errors.
  This facilitates reporting errors caught in sub-functions (e.g.,
  rejecting too large integral literals from a conversion function
  used by the scanner, or rejecting invalid combinations from a
  factory invoked by the user actions).

*** %define api.value.type variant

This is based on a submission from Michiel De Wilde.  With help
  from Théophile Ranquet.

In this mode, complex C++ objects can be used as semantic values.  For
  instance:

%token <::std::string> TEXT;
    %token <int> NUMBER;
    %token SEMICOLON ";"
    %type <::std::string> item;
    %type <::std::list<std::string>> list;
    %%
    result:
      list  { std::cout << $1 << std::endl; }
    ;

list:
      %empty        { /* Generates an empty string list. */ }
    | list item ";" { std::swap ($$, $1); $$.push_back ($2); }
    ;

item:
      TEXT    { std::swap ($$, $1); }
    | NUMBER  { $$ = string_cast ($1); }
    ;

*** %define api.token.constructor

When variants are enabled, Bison can generate functions to build the
  tokens.  This guarantees that the token type (e.g., NUMBER) is consistent
  with the semantic value (e.g., int):

parser::symbol_type yylex ()
    {
      parser::location_type loc = ...;
      ...
      return parser::make_TEXT ("Hello, world!", loc);
      ...
      return parser::make_NUMBER (42, loc);
      ...
      return parser::make_SEMICOLON (loc);
      ...
    }

*** C++ locations

There are operator- and operator-= for 'location'.  Negative line/column
  increments can no longer underflow the resulting value.

* Noteworthy changes in release 2.7.1 (2013-04-15) [stable]

** Bug fixes

*** Fix compiler attribute portability (yacc.c)

With locations enabled, __attribute__ was used unprotected.

*** Fix some compiler warnings (lalr1.cc)

* Noteworthy changes in release 2.7 (2012-12-12) [stable]

** Bug fixes

Warnings about uninitialized yylloc in yyparse have been fixed.

Restored C90 compliance (yet no report was ever made).

** Diagnostics are improved

Contributed by Théophile Ranquet.

*** Changes in the format of error messages

This used to be the format of many error reports:

input.y:2.7-12: %type redeclaration for exp
    input.y:1.7-12: previous declaration

It is now:

input.y:2.7-12: error: %type redeclaration for exp
    input.y:1.7-12:     previous declaration

*** New format for error reports: carets

Caret errors have been added to Bison:

input.y:2.7-12: error: %type redeclaration for exp
     %type <sval> exp
           ^^^^^^
    input.y:1.7-12:     previous declaration
     %type <ival> exp
           ^^^^^^

input.y:3.20-23: error: ambiguous reference: '$exp'
     exp: exp '+' exp { $exp = $1 + $3; };
                        ^^^^
    input.y:3.1-3:       refers to: $exp at $$
     exp: exp '+' exp { $exp = $1 + $3; };
     ^^^
    input.y:3.6-8:       refers to: $exp at $1
     exp: exp '+' exp { $exp = $1 + $3; };
          ^^^
    input.y:3.14-16:     refers to: $exp at $3
     exp: exp '+' exp { $exp = $1 + $3; };
                  ^^^

The default behavior for now is still not to display these unless
  explicitly asked with -fcaret (or -fall). However, in a later release, it
  will be made the default behavior (but may still be deactivated with
  -fno-caret).

** New value for %define variable: api.pure full

The %define variable api.pure requests a pure (reentrant) parser. However,
  for historical reasons, using it in a location-tracking Yacc parser
  resulted in a yyerror function that did not take a location as a
  parameter. With this new value, the user may request a better pure parser,
  where yyerror does take a location as a parameter (in location-tracking
  parsers).

The use of "%define api.pure true" is deprecated in favor of this new
  "%define api.pure full".

** New %define variable: api.location.type (glr.cc, lalr1.cc, lalr1.java)

The %define variable api.location.type defines the name of the type to use
  for locations.  When defined, Bison no longer generates the position.hh
  and location.hh files, nor does the parser will include them: the user is
  then responsible to define her type.

This can be used in programs with several parsers to factor their location
  and position files: let one of them generate them, and the others just use
  them.

This feature was actually introduced, but not documented, in Bison 2.5,
  under the name "location_type" (which is maintained for backward
  compatibility).

For consistency, lalr1.java's %define variables location_type and
  position_type are deprecated in favor of api.location.type and
  api.position.type.

** Exception safety (lalr1.cc)

The parse function now catches exceptions, uses the %destructors to
  release memory (the lookahead symbol and the symbols pushed on the stack)
  before re-throwing the exception.

This feature is somewhat experimental.  User feedback would be
  appreciated.

** Graph improvements in DOT and XSLT

Contributed by Théophile Ranquet.

The graphical presentation of the states is more readable: their shape is
  now rectangular, the state number is clearly displayed, and the items are
  numbered and left-justified.

The reductions are now explicitly represented as transitions to other
  diamond shaped nodes.

These changes are present in both --graph output and xml2dot.xsl XSLT
  processing, with minor (documented) differences.

** %language is no longer an experimental feature.

The introduction of this feature, in 2.4, was four years ago. The
  --language option and the %language directive are no longer experimental.

** Documentation

The sections about shift/reduce and reduce/reduce conflicts resolution
  have been fixed and extended.

Although introduced more than four years ago, XML and Graphviz reports
  were not properly documented.

The translation of mid-rule actions is now described.

* Noteworthy changes in release 2.6.5 (2012-11-07) [stable]

We consider compiler warnings about Bison generated parsers to be bugs.
  Rather than working around them in your own project, please consider
  reporting them to us.

** Bug fixes

Warnings about uninitialized yylval and/or yylloc for push parsers with a
  pure interface have been fixed for GCC 4.0 up to 4.8, and Clang 2.9 to
  3.2.

Other issues in the test suite have been addressed.

Null characters are correctly displayed in error messages.

When possible, yylloc is correctly initialized before calling yylex.  It
  is no longer necessary to initialize it in the %initial-action.

* Noteworthy changes in release 2.6.4 (2012-10-23) [stable]

Bison 2.6.3's --version was incorrect.  This release fixes this issue.

* Noteworthy changes in release 2.6.3 (2012-10-22) [stable]

** Bug fixes

Bugs and portability issues in the test suite have been fixed.

Some errors in translations have been addressed, and --help now directs
  users to the appropriate place to report them.

Stray Info files shipped by accident are removed.

Incorrect definitions of YY_, issued by yacc.c when no parser header is
  generated, are removed.

All the generated headers are self-contained.

** Header guards (yacc.c, glr.c, glr.cc)

In order to avoid collisions, the header guards are now
  YY_<PREFIX>_<FILE>_INCLUDED, instead of merely <PREFIX>_<FILE>.
  For instance the header generated from

%define api.prefix "calc"
    %defines "lib/parse.h"

will use YY_CALC_LIB_PARSE_H_INCLUDED as guard.

** Fix compiler warnings in the generated parser (yacc.c, glr.c)

The compilation of pure parsers (%define api.pure) can trigger GCC
  warnings such as:

input.c: In function 'yyparse':
    input.c:1503:12: warning: 'yylval' may be used uninitialized in this
                              function [-Wmaybe-uninitialized]
       *++yyvsp = yylval;
                ^

This is now fixed; pragmas to avoid these warnings are no longer needed.

Warnings from clang ("equality comparison with extraneous parentheses" and
  "function declared 'noreturn' should not return") have also been
  addressed.

* Noteworthy changes in release 2.6.2 (2012-08-03) [stable]

** Bug fixes

Buffer overruns, complaints from Flex, and portability issues in the test
  suite have been fixed.

** Spaces in %lex- and %parse-param (lalr1.cc, glr.cc)

Trailing end-of-lines in %parse-param or %lex-param would result in
  invalid C++.  This is fixed.

** Spurious spaces and end-of-lines

The generated files no longer end (nor start) with empty lines.

* Noteworthy changes in release 2.6.1 (2012-07-30) [stable]

Bison no longer executes user-specified M4 code when processing a grammar.

** Future Changes

In addition to the removal of the features announced in Bison 2.6, the
  next major release will remove the "Temporary hack for adding a semicolon
  to the user action", as announced in the release 2.5.  Instead of:

exp: exp "+" exp { $$ = $1 + $3 };

write:

exp: exp "+" exp { $$ = $1 + $3; };

** Bug fixes

*** Type names are now properly escaped.

*** glr.cc: set_debug_level and debug_level work as expected.

*** Stray @ or $ in actions

While Bison used to warn about stray $ or @ in action rules, it did not
  for other actions such as printers, destructors, or initial actions.  It
  now does.

** Type names in actions

For consistency with rule actions, it is now possible to qualify $$ by a
  type-name in destructors, printers, and initial actions.  For instance:

%printer { fprintf (yyo, "(%d, %f)", $<ival>$, $<fval>$); } <*> <>;

will display two values for each typed and untyped symbol (provided
  that YYSTYPE has both "ival" and "fval" fields).

* Noteworthy changes in release 2.6 (2012-07-19) [stable]

** Future changes

The next major release of Bison will drop support for the following
  deprecated features.  Please report disagreements to bug-bison@gnu.org.

*** K&R C parsers

Support for generating parsers in K&R C will be removed.  Parsers
  generated for C support ISO C90, and are tested with ISO C99 and ISO C11
  compilers.

*** Features deprecated since Bison 1.875

The definitions of yystype and yyltype will be removed; use YYSTYPE and
  YYLTYPE.

YYPARSE_PARAM and YYLEX_PARAM, deprecated in favor of %parse-param and
  %lex-param, will no longer be supported.

Support for the preprocessor symbol YYERROR_VERBOSE will be removed, use
  %error-verbose.

*** The generated header will be included (yacc.c)

Instead of duplicating the content of the generated header (definition of
  YYSTYPE, yyparse declaration etc.), the generated parser will include it,
  as is already the case for GLR or C++ parsers.  This change is deferred
  because existing versions of ylwrap (e.g., Automake 1.12.1) do not support
  it.

** Generated Parser Headers

*** Guards (yacc.c, glr.c, glr.cc)

The generated headers are now guarded, as is already the case for C++
  parsers (lalr1.cc).  For instance, with --defines=foo.h:

#ifndef YY_FOO_H
    # define YY_FOO_H
    ...
    #endif /* !YY_FOO_H  */

*** New declarations (yacc.c, glr.c)

The generated header now declares yydebug and yyparse.  Both honor
  --name-prefix=bar_, and yield

int bar_parse (void);

rather than

#define yyparse bar_parse
    int yyparse (void);

in order to facilitate the inclusion of several parser headers inside a
  single compilation unit.

*** Exported symbols in C++

The symbols YYTOKEN_TABLE and YYERROR_VERBOSE, which were defined in the
  header, are removed, as they prevent the possibility of including several
  generated headers from a single compilation unit.

*** YYLSP_NEEDED

For the same reasons, the undocumented and unused macro YYLSP_NEEDED is no
  longer defined.

** New %define variable: api.prefix

Now that the generated headers are more complete and properly protected
  against multiple inclusions, constant names, such as YYSTYPE are a
  problem.  While yyparse and others are properly renamed by %name-prefix,
  YYSTYPE, YYDEBUG and others have never been affected by it.  Because it
  would introduce backward compatibility issues in projects not expecting
  YYSTYPE to be renamed, instead of changing the behavior of %name-prefix,
  it is deprecated in favor of a new %define variable: api.prefix.

The following examples compares both:

%name-prefix "bar_"               | %define api.prefix "bar_"
    %token <ival> FOO                   %token <ival> FOO
    %union { int ival; }                %union { int ival; }
    %%                                  %%
    exp: 'a';                           exp: 'a';

bison generates:

#ifndef BAR_FOO_H                   #ifndef BAR_FOO_H
    # define BAR_FOO_H                  # define BAR_FOO_H

/* Enabling traces.  */             /* Enabling traces.  */
    # ifndef YYDEBUG                  | # ifndef BAR_DEBUG
                                      > #  if defined YYDEBUG
                                      > #   if YYDEBUG
                                      > #    define BAR_DEBUG 1
                                      > #   else
                                      > #    define BAR_DEBUG 0
                                      > #   endif
                                      > #  else
    #  define YYDEBUG 0               | #   define BAR_DEBUG 0
                                      > #  endif
    # endif                           | # endif

# if YYDEBUG                      | # if BAR_DEBUG
    extern int bar_debug;               extern int bar_debug;
    # endif                             # endif

/* Tokens.  */                      /* Tokens.  */
    # ifndef YYTOKENTYPE              | # ifndef BAR_TOKENTYPE
    #  define YYTOKENTYPE             | #  define BAR_TOKENTYPE
       enum yytokentype {             |    enum bar_tokentype {
         FOO = 258                           FOO = 258
       };                                  };
    # endif                             # endif

#if ! defined YYSTYPE \           | #if ! defined BAR_STYPE \
     && ! defined YYSTYPE_IS_DECLARED |  && ! defined BAR_STYPE_IS_DECLARED
    typedef union YYSTYPE             | typedef union BAR_STYPE
    {                                   {
     int ival;                           int ival;
    } YYSTYPE;                        | } BAR_STYPE;
    # define YYSTYPE_IS_DECLARED 1    | # define BAR_STYPE_IS_DECLARED 1
    #endif                              #endif

extern YYSTYPE bar_lval;          | extern BAR_STYPE bar_lval;

int bar_parse (void);               int bar_parse (void);

#endif /* !BAR_FOO_H  */            #endif /* !BAR_FOO_H  */

* Noteworthy changes in release 2.5.1 (2012-06-05) [stable]

** Future changes:

The next major release will drop support for generating parsers in K&R C.

** yacc.c: YYBACKUP works as expected.

** glr.c improvements:

*** Location support is eliminated when not requested:

GLR parsers used to include location-related code even when locations were
  not requested, and therefore not even usable.

*** __attribute__ is preserved:

__attribute__ is no longer disabled when __STRICT_ANSI__ is defined (i.e.,
  when -std is passed to GCC).

** lalr1.java: several fixes:

The Java parser no longer throws ArrayIndexOutOfBoundsException if the
  first token leads to a syntax error.  Some minor clean ups.

** Changes for C++:

*** C++11 compatibility:

C and C++ parsers use "nullptr" instead of "0" when __cplusplus is 201103L
  or higher.

*** Header guards

The header files such as "parser.hh", "location.hh", etc. used a constant
  name for preprocessor guards, for instance:

#ifndef BISON_LOCATION_HH
    # define BISON_LOCATION_HH
    ...
    #endif // !BISON_LOCATION_HH

The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
  case characters are converted to upper case, and series of
  non-alphanumerical characters are converted to an underscore.

With "bison -o lang++/parser.cc", "location.hh" would now include:

#ifndef YY_LANG_LOCATION_HH
    # define YY_LANG_LOCATION_HH
    ...
    #endif // !YY_LANG_LOCATION_HH

*** C++ locations:

The position and location constructors (and their initialize methods)
  accept new arguments for line and column.  Several issues in the
  documentation were fixed.

** liby is no longer asking for "rpl_fprintf" on some platforms.

** Changes in the manual:

*** %printer is documented

The "%printer" directive, supported since at least Bison 1.50, is finally
  documented.  The "mfcalc" example is extended to demonstrate it.

For consistency with the C skeletons, the C++ parsers now also support
  "yyoutput" (as an alias to "debug_stream ()").

*** Several improvements have been made:

The layout for grammar excerpts was changed to a more compact scheme.
  Named references are motivated.  The description of the automaton
  description file (*.output) is updated to the current format.  Incorrect
  index entries were fixed.  Some other errors were fixed.

** Building bison:

*** Conflicting prototypes with recent/modified Flex.

Fixed build problems with the current, unreleased, version of Flex, and
  some modified versions of 2.5.35, which have modified function prototypes.

*** Warnings during the build procedure have been eliminated.

*** Several portability problems in the test suite have been fixed:

This includes warnings with some compilers, unexpected behavior of tools
  such as diff, warning messages from the test suite itself, etc.

*** The install-pdf target works properly:

Running "make install-pdf" (or -dvi, -html, -info, and -ps) no longer
  halts in the middle of its course.

* Changes in version 2.5 (2011-05-14):

** Grammar symbol names can now contain non-initial dashes:

Consistently with directives (such as %error-verbose) and with
  %define variables (e.g. push-pull), grammar symbol names may contain
  dashes in any position except the beginning.  This is a GNU
  extension over POSIX Yacc.  Thus, use of this extension is reported
  by -Wyacc and rejected in Yacc mode (--yacc).

** Named references:

Historically, Yacc and Bison have supported positional references
  ($n, $$) to allow access to symbol values from inside of semantic
  actions code.

Starting from this version, Bison can also accept named references.
  When no ambiguity is possible, original symbol names may be used
  as named references:

if_stmt : "if" cond_expr "then" then_stmt ';'
    { $if_stmt = mk_if_stmt($cond_expr, $then_stmt); }

In the more common case, explicit names may be declared:

stmt[res] : "if" expr[cond] "then" stmt[then] "else" stmt[else] ';'
    { $res = mk_if_stmt($cond, $then, $else); }

Location information is also accessible using @name syntax.  When
  accessing symbol names containing dots or dashes, explicit bracketing
  ($[sym.1]) must be used.

These features are experimental in this version.  More user feedback
  will help to stabilize them.
  Contributed by Alex Rozenman.

** IELR(1) and canonical LR(1):

IELR(1) is a minimal LR(1) parser table generation algorithm.  That
  is, given any context-free grammar, IELR(1) generates parser tables
  with the full language-recognition power of canonical LR(1) but with
  nearly the same number of parser states as LALR(1).  This reduction
  in parser states is often an order of magnitude.  More importantly,
  because canonical LR(1)'s extra parser states may contain duplicate
  conflicts in the case of non-LR(1) grammars, the number of conflicts
  for IELR(1) is often an order of magnitude less as well.  This can
  significantly reduce the complexity of developing of a grammar.

Bison can now generate IELR(1) and canonical LR(1) parser tables in
  place of its traditional LALR(1) parser tables, which remain the
  default.  You can specify the type of parser tables in the grammar
  file with these directives:

%define lr.type lalr
    %define lr.type ielr
    %define lr.type canonical-lr

The default-reduction optimization in the parser tables can also be
  adjusted using "%define lr.default-reductions".  For details on both
  of these features, see the new section "Tuning LR" in the Bison
  manual.

These features are experimental.  More user feedback will help to
  stabilize them.

** LAC (Lookahead Correction) for syntax error handling

Contributed by Joel E. Denny.

Canonical LR, IELR, and LALR can suffer from a couple of problems
  upon encountering a syntax error.  First, the parser might perform
  additional parser stack reductions before discovering the syntax
  error.  Such reductions can perform user semantic actions that are
  unexpected because they are based on an invalid token, and they
  cause error recovery to begin in a different syntactic context than
  the one in which the invalid token was encountered.  Second, when
  verbose error messages are enabled (with %error-verbose or the
  obsolete "#define YYERROR_VERBOSE"), the expected token list in the
  syntax error message can both contain invalid tokens and omit valid
  tokens.

The culprits for the above problems are %nonassoc, default
  reductions in inconsistent states, and parser state merging.  Thus,
  IELR and LALR suffer the most.  Canonical LR can suffer only if
  %nonassoc is used or if default reductions are enabled for
  inconsistent states.

LAC is a new mechanism within the parsing algorithm that solves
  these problems for canonical LR, IELR, and LALR without sacrificing
  %nonassoc, default reductions, or state merging.  When LAC is in
  use, canonical LR and IELR behave almost exactly the same for both
  syntactically acceptable and syntactically unacceptable input.
  While LALR still does not support the full language-recognition
  power of canonical LR and IELR, LAC at least enables LALR's syntax
  error handling to correctly reflect LALR's language-recognition
  power.

Currently, LAC is only supported for deterministic parsers in C.
  You can enable LAC with the following directive:

%define parse.lac full

See the new section "LAC" in the Bison manual for additional
  details including a few caveats.

LAC is an experimental feature.  More user feedback will help to
  stabilize it.

** %define improvements:

*** Can now be invoked via the command line:

Each of these command-line options

-D NAME[=VALUE]
    --define=NAME[=VALUE]

-F NAME[=VALUE]
    --force-define=NAME[=VALUE]

is equivalent to this grammar file declaration

%define NAME ["VALUE"]

except that the manner in which Bison processes multiple definitions
  for the same NAME differs.  Most importantly, -F and --force-define
  quietly override %define, but -D and --define do not.  For further
  details, see the section "Bison Options" in the Bison manual.

*** Variables renamed:

The following %define variables

api.push_pull
    lr.keep_unreachable_states

have been renamed to

api.push-pull
    lr.keep-unreachable-states

The old names are now deprecated but will be maintained indefinitely
  for backward compatibility.

*** Values no longer need to be quoted in the grammar file:

If a %define value is an identifier, it no longer needs to be placed
  within quotations marks.  For example,

%define api.push-pull "push"

can be rewritten as

%define api.push-pull push

*** Unrecognized variables are now errors not warnings.

*** Multiple invocations for any variable is now an error not a warning.

** Unrecognized %code qualifiers are now errors not warnings.

** Character literals not of length one:

Previously, Bison quietly converted all character literals to length
  one.  For example, without warning, Bison interpreted the operators in
  the following grammar to be the same token:

exp: exp '++'
       | exp '+' exp
       ;

Bison now warns when a character literal is not of length one.  In
  some future release, Bison will start reporting an error instead.

** Destructor calls fixed for lookaheads altered in semantic actions:

Previously for deterministic parsers in C, if a user semantic action
  altered yychar, the parser in some cases used the old yychar value to
  determine which destructor to call for the lookahead upon a syntax
  error or upon parser return.  This bug has been fixed.

** C++ parsers use YYRHSLOC:

Similarly to the C parsers, the C++ parsers now define the YYRHSLOC
  macro and use it in the default YYLLOC_DEFAULT.  You are encouraged
  to use it.  If, for instance, your location structure has "first"
  and "last" members, instead of

# define YYLLOC_DEFAULT(Current, Rhs, N)                             \
      do                                                                 \
        if (N)                                                           \
          {                                                              \
            (Current).first = (Rhs)[1].location.first;                   \
            (Current).last  = (Rhs)[N].location.last;                    \
          }                                                              \
        else                                                             \
          {                                                              \
            (Current).first = (Current).last = (Rhs)[0].location.last;   \
          }                                                              \
      while (false)

use:

# define YYLLOC_DEFAULT(Current, Rhs, N)                             \
      do                                                                 \
        if (N)                                                           \
          {                                                              \
            (Current).first = YYRHSLOC (Rhs, 1).first;                   \
            (Current).last  = YYRHSLOC (Rhs, N).last;                    \
          }                                                              \
        else                                                             \
          {                                                              \
            (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last;   \
          }                                                              \
      while (false)

** YYLLOC_DEFAULT in C++:

The default implementation of YYLLOC_DEFAULT used to be issued in
  the header file.  It is now output in the implementation file, after
  the user %code sections so that its #ifndef guard does not try to
  override the user's YYLLOC_DEFAULT if provided.

** YYFAIL now produces warnings and Java parsers no longer implement it:

YYFAIL has existed for many years as an undocumented feature of
  deterministic parsers in C generated by Bison.  More recently, it was
  a documented feature of Bison's experimental Java parsers.  As
  promised in Bison 2.4.2's NEWS entry, any appearance of YYFAIL in a
  semantic action now produces a deprecation warning, and Java parsers
  no longer implement YYFAIL at all.  For further details, including a
  discussion of how to suppress C preprocessor warnings about YYFAIL
  being unused, see the Bison 2.4.2 NEWS entry.

** Temporary hack for adding a semicolon to the user action:

Previously, Bison appended a semicolon to every user action for
  reductions when the output language defaulted to C (specifically, when
  neither %yacc, %language, %skeleton, or equivalent command-line
  options were specified).  This allowed actions such as

exp: exp "+" exp { $$ = $1 + $3 };

instead of

exp: exp "+" exp { $$ = $1 + $3; };

As a first step in removing this misfeature, Bison now issues a
  warning when it appends a semicolon.  Moreover, in cases where Bison
  cannot easily determine whether a semicolon is needed (for example, an
  action ending with a cpp directive or a braced compound initializer),
  it no longer appends one.  Thus, the C compiler might now complain
  about a missing semicolon where it did not before.  Future releases of
  Bison will cease to append semicolons entirely.

** Verbose syntax error message fixes:

When %error-verbose or the obsolete "#define YYERROR_VERBOSE" is
  specified, syntax error messages produced by the generated parser
  include the unexpected token as well as a list of expected tokens.
  The effect of %nonassoc on these verbose messages has been corrected
  in two ways, but a more complete fix requires LAC, described above:

*** When %nonassoc is used, there can exist parser states that accept no
    tokens, and so the parser does not always require a lookahead token
    in order to detect a syntax error.  Because no unexpected token or
    expected tokens can then be reported, the verbose syntax error
    message described above is suppressed, and the parser instead
    reports the simpler message, "syntax error".  Previously, this
    suppression was sometimes erroneously triggered by %nonassoc when a
    lookahead was actually required.  Now verbose messages are
    suppressed only when all previous lookaheads have already been
    shifted or discarded.

*** Previously, the list of expected tokens erroneously included tokens
    that would actually induce a syntax error because conflicts for them
    were resolved with %nonassoc in the current parser state.  Such
    tokens are now properly omitted from the list.

*** Expected token lists are still often wrong due to state merging
    (from LALR or IELR) and default reductions, which can both add
    invalid tokens and subtract valid tokens.  Canonical LR almost
    completely fixes this problem by eliminating state merging and
    default reductions.  However, there is one minor problem left even
    when using canonical LR and even after the fixes above.  That is,
    if the resolution of a conflict with %nonassoc appears in a later
    parser state than the one at which some syntax error is
    discovered, the conflicted token is still erroneously included in
    the expected token list.  Bison's new LAC implementation,
    described above, eliminates this problem and the need for
    canonical LR.  However, LAC is still experimental and is disabled
    by default.

** Java skeleton fixes:

*** A location handling bug has been fixed.

*** The top element of each of the value stack and location stack is now
    cleared when popped so that it can be garbage collected.

*** Parser traces now print the top element of the stack.

** -W/--warnings fixes:

*** Bison now properly recognizes the "no-" versions of categories:

For example, given the following command line, Bison now enables all
  warnings except warnings for incompatibilities with POSIX Yacc:

bison -Wall,no-yacc gram.y

*** Bison now treats S/R and R/R conflicts like other warnings:

Previously, conflict reports were independent of Bison's normal
  warning system.  Now, Bison recognizes the warning categories
  "conflicts-sr" and "conflicts-rr".  This change has important
  consequences for the -W and --warnings command-line options.  For
  example:

bison -Wno-conflicts-sr gram.y  # S/R conflicts not reported
    bison -Wno-conflicts-rr gram.y  # R/R conflicts not reported
    bison -Wnone            gram.y  # no conflicts are reported
    bison -Werror           gram.y  # any conflict is an error

However, as before, if the %expect or %expect-rr directive is
  specified, an unexpected number of conflicts is an error, and an
  expected number of conflicts is not reported, so -W and --warning
  then have no effect on the conflict report.

*** The "none" category no longer disables a preceding "error":

For example, for the following command line, Bison now reports
  errors instead of warnings for incompatibilities with POSIX Yacc:

bison -Werror,none,yacc gram.y

*** The "none" category now disables all Bison warnings:

Previously, the "none" category disabled only Bison warnings for
  which there existed a specific -W/--warning category.  However,
  given the following command line, Bison is now guaranteed to
  suppress all warnings:

bison -Wnone gram.y

** Precedence directives can now assign token number 0:

Since Bison 2.3b, which restored the ability of precedence
  directives to assign token numbers, doing so for token number 0 has
  produced an assertion failure.  For example:

%left END 0

This bug has been fixed.

* Changes in version 2.4.3 (2010-08-05):

** Bison now obeys -Werror and --warnings=error for warnings about
   grammar rules that are useless in the parser due to conflicts.

** Problems with spawning M4 on at least FreeBSD 8 and FreeBSD 9 have
   been fixed.

** Failures in the test suite for GCC 4.5 have been fixed.

** Failures in the test suite for some versions of Sun Studio C++ have
   been fixed.

** Contrary to Bison 2.4.2's NEWS entry, it has been decided that
   warnings about undefined %prec identifiers will not be converted to
   errors in Bison 2.5.  They will remain warnings, which should be
   sufficient for POSIX while avoiding backward compatibility issues.

** Minor documentation fixes.

* Changes in version 2.4.2 (2010-03-20):

** Some portability problems that resulted in failures and livelocks
   in the test suite on some versions of at least Solaris, AIX, HP-UX,
   RHEL4, and Tru64 have been addressed.  As a result, fatal Bison
   errors should no longer cause M4 to report a broken pipe on the
   affected platforms.

** "%prec IDENTIFIER" requires IDENTIFIER to be defined separately.

POSIX specifies that an error be reported for any identifier that does
  not appear on the LHS of a grammar rule and that is not defined by
  %token, %left, %right, or %nonassoc.  Bison 2.3b and later lost this
  error report for the case when an identifier appears only after a
  %prec directive.  It is now restored.  However, for backward
  compatibility with recent Bison releases, it is only a warning for
  now.  In Bison 2.5 and later, it will return to being an error.
  [Between the 2.4.2 and 2.4.3 releases, it was decided that this
  warning will not be converted to an error in Bison 2.5.]

** Detection of GNU M4 1.4.6 or newer during configure is improved.

** Warnings from gcc's -Wundef option about undefined YYENABLE_NLS,
   YYLTYPE_IS_TRIVIAL, and __STRICT_ANSI__ in C/C++ parsers are now
   avoided.

** %code is now a permanent feature.

A traditional Yacc prologue directive is written in the form:

%{CODE%}

To provide a more flexible alternative, Bison 2.3b introduced the
  %code directive with the following forms for C/C++:

%code          {CODE}
    %code requires {CODE}
    %code provides {CODE}
    %code top      {CODE}

These forms are now considered permanent features of Bison.  See the
  %code entries in the section "Bison Declaration Summary" in the Bison
  manual for a summary of their functionality.  See the section
  "Prologue Alternatives" for a detailed discussion including the
  advantages of %code over the traditional Yacc prologue directive.

Bison's Java feature as a whole including its current usage of %code
  is still considered experimental.

** YYFAIL is deprecated and will eventually be removed.

YYFAIL has existed for many years as an undocumented feature of
  deterministic parsers in C generated by Bison.  Previously, it was
  documented for Bison's experimental Java parsers.  YYFAIL is no longer
  documented for Java parsers and is formally deprecated in both cases.
  Users are strongly encouraged to migrate to YYERROR, which is
  specified by POSIX.

Like YYERROR, you can invoke YYFAIL from a semantic action in order to
  induce a syntax error.  The most obvious difference from YYERROR is
  that YYFAIL will automatically invoke yyerror to report the syntax
  error so that you don't have to.  However, there are several other
  subtle differences between YYERROR and YYFAIL, and YYFAIL suffers from
  inherent flaws when %error-verbose or "#define YYERROR_VERBOSE" is
  used.  For a more detailed discussion, see:

http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html

The upcoming Bison 2.5 will remove YYFAIL from Java parsers, but
  deterministic parsers in C will continue to implement it.  However,
  because YYFAIL is already flawed, it seems futile to try to make new
  Bison features compatible with it.  Thus, during parser generation,
  Bison 2.5 will produce a warning whenever it discovers YYFAIL in a
  rule action.  In a later release, YYFAIL will be disabled for
  %error-verbose and "#define YYERROR_VERBOSE".  Eventually, YYFAIL will
  be removed altogether.

There exists at least one case where Bison 2.5's YYFAIL warning will
  be a false positive.  Some projects add phony uses of YYFAIL and other
  Bison-defined macros for the sole purpose of suppressing C
  preprocessor warnings (from GCC cpp's -Wunused-macros, for example).
  To avoid Bison's future warning, such YYFAIL uses can be moved to the
  epilogue (that is, after the second "%%") in the Bison input file.  In
  this release (2.4.2), Bison already generates its own code to suppress
  C preprocessor warnings for YYFAIL, so projects can remove their own
  phony uses of YYFAIL if compatibility with Bison releases prior to
  2.4.2 is not necessary.

** Internationalization.

Fix a regression introduced in Bison 2.4: Under some circumstances,
  message translations were not installed although supported by the
  host system.

* Changes in version 2.4.1 (2008-12-11):

** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc
   declarations have been fixed.

** Temporary hack for adding a semicolon to the user action.

Bison used to prepend a trailing semicolon at the end of the user
  action for reductions.  This allowed actions such as

exp: exp "+" exp { $$ = $1 + $3 };

instead of

exp: exp "+" exp { $$ = $1 + $3; };

Some grammars still depend on this "feature".  Bison 2.4.1 restores
  the previous behavior in the case of C output (specifically, when
  neither %language or %skeleton or equivalent command-line options
  are used) to leave more time for grammars depending on the old
  behavior to be adjusted.  Future releases of Bison will disable this
  feature.

** A few minor improvements to the Bison manual.

* Changes in version 2.4 (2008-11-02):

** %language is an experimental feature.

We first introduced this feature in test release 2.3b as a cleaner
  alternative to %skeleton.  Since then, we have discussed the possibility of
  modifying its effect on Bison's output file names.  Thus, in this release,
  we consider %language to be an experimental feature that will likely evolve
  in future releases.

** Forward compatibility with GNU M4 has been improved.

** Several bugs in the C++ skeleton and the experimental Java skeleton have been
  fixed.

* Changes in version 2.3b (2008-05-27):

** The quotes around NAME that used to be required in the following directive
  are now deprecated:

%define NAME "VALUE"

** The directive "%pure-parser" is now deprecated in favor of:

%define api.pure

which has the same effect except that Bison is more careful to warn about
  unreasonable usage in the latter case.

** Push Parsing

Bison can now generate an LALR(1) parser in C with a push interface.  That
  is, instead of invoking "yyparse", which pulls tokens from "yylex", you can
  push one token at a time to the parser using "yypush_parse", which will
  return to the caller after processing each token.  By default, the push
  interface is disabled.  Either of the following directives will enable it:

%define api.push_pull "push" // Just push; does not require yylex.
    %define api.push_pull "both" // Push and pull; requires yylex.

See the new section "A Push Parser" in the Bison manual for details.

The current push parsing interface is experimental and may evolve.  More user
  feedback will help to stabilize it.

** The -g and --graph options now output graphs in Graphviz DOT format,
  not VCG format.  Like --graph, -g now also takes an optional FILE argument
  and thus cannot be bundled with other short options.

** Java

Bison can now generate an LALR(1) parser in Java.  The skeleton is
  "data/lalr1.java".  Consider using the new %language directive instead of
  %skeleton to select it.

See the new section "Java Parsers" in the Bison manual for details.

The current Java interface is experimental and may evolve.  More user
  feedback will help to stabilize it.
  Contributed by Paolo Bonzini.

** %language

This new directive specifies the programming language of the generated
  parser, which can be C (the default), C++, or Java.  Besides the skeleton
  that Bison uses, the directive affects the names of the generated files if
  the grammar file's name ends in ".y".

** XML Automaton Report

Bison can now generate an XML report of the LALR(1) automaton using the new
  "--xml" option.  The current XML schema is experimental and may evolve.  More
  user feedback will help to stabilize it.
  Contributed by Wojciech Polak.

** The grammar file may now specify the name of the parser header file using
  %defines.  For example:

%defines "parser.h"

** When reporting useless rules, useless nonterminals, and unused terminals,
  Bison now employs the terms "useless in grammar" instead of "useless",
  "useless in parser" instead of "never reduced", and "unused in grammar"
  instead of "unused".

** Unreachable State Removal

Previously, Bison sometimes generated parser tables containing unreachable
  states.  A state can become unreachable during conflict resolution if Bison
  disables a shift action leading to it from a predecessor state.  Bison now:

1. Removes unreachable states.

2. Does not report any conflicts that appeared in unreachable states.
       WARNING: As a result, you may need to update %expect and %expect-rr
       directives in existing grammar files.

3. For any rule used only in such states, Bison now reports the rule as
       "useless in parser due to conflicts".

This feature can be disabled with the following directive:

%define lr.keep_unreachable_states

See the %define entry in the "Bison Declaration Summary" in the Bison manual
  for further discussion.

** Lookahead Set Correction in the ".output" Report

When instructed to generate a ".output" file including lookahead sets
  (using "--report=lookahead", for example), Bison now prints each reduction's
  lookahead set only next to the associated state's one item that (1) is
  associated with the same rule as the reduction and (2) has its dot at the end
  of its RHS.  Previously, Bison also erroneously printed the lookahead set
  next to all of the state's other items associated with the same rule.  This
  bug affected only the ".output" file and not the generated parser source
  code.

** --report-file=FILE is a new option to override the default ".output" file
  name.

** The "=" that used to be required in the following directives is now
  deprecated:

%file-prefix "parser"
    %name-prefix "c_"
    %output "parser.c"

** An Alternative to "%{...%}" -- "%code QUALIFIER {CODE}"

Bison 2.3a provided a new set of directives as a more flexible alternative to
  the traditional Yacc prologue blocks.  Those have now been consolidated into
  a single %code directive with an optional qualifier field, which identifies
  the purpose of the code and thus the location(s) where Bison should generate
  it:

1. "%code          {CODE}" replaces "%after-header  {CODE}"
    2. "%code requires {CODE}" replaces "%start-header  {CODE}"
    3. "%code provides {CODE}" replaces "%end-header    {CODE}"
    4. "%code top      {CODE}" replaces "%before-header {CODE}"

See the %code entries in section "Bison Declaration Summary" in the Bison
  manual for a summary of the new functionality.  See the new section "Prologue
  Alternatives" for a detailed discussion including the advantages of %code
  over the traditional Yacc prologues.

The prologue alternatives are experimental.  More user feedback will help to
  determine whether they should become permanent features.

** Revised warning: unset or unused mid-rule values

Since Bison 2.2, Bison has warned about mid-rule values that are set but not
  used within any of the actions of the parent rule.  For example, Bison warns
  about unused $2 in:

exp: '1' { $$ = 1; } '+' exp { $$ = $1 + $4; };

Now, Bison also warns about mid-rule values that are used but not set.  For
  example, Bison warns about unset $$ in the mid-rule action in:

exp: '1' { $1 = 1; } '+' exp { $$ = $2 + $4; };

However, Bison now disables both of these warnings by default since they
  sometimes prove to be false alarms in existing grammars employing the Yacc
  constructs $0 or $-N (where N is some positive integer).

To enable these warnings, specify the option "--warnings=midrule-values" or
  "-W", which is a synonym for "--warnings=all".

** Default %destructor or %printer with "<*>" or "<>"

Bison now recognizes two separate kinds of default %destructor's and
  %printer's:

1. Place "<*>" in a %destructor/%printer symbol list to define a default
       %destructor/%printer for all grammar symbols for which you have formally
       declared semantic type tags.

2. Place "<>" in a %destructor/%printer symbol list to define a default
       %destructor/%printer for all grammar symbols without declared semantic
       type tags.

Bison no longer supports the "%symbol-default" notation from Bison 2.3a.
  "<*>" and "<>" combined achieve the same effect with one exception: Bison no
  longer applies any %destructor to a mid-rule value if that mid-rule value is
  not actually ever referenced using either $$ or $n in a semantic action.

The default %destructor's and %printer's are experimental.  More user
  feedback will help to determine whether they should become permanent
  features.

See the section "Freeing Discarded Symbols" in the Bison manual for further
  details.

** %left, %right, and %nonassoc can now declare token numbers.  This is required
  by POSIX.  However, see the end of section "Operator Precedence" in the Bison
  manual for a caveat concerning the treatment of literal strings.

** The nonfunctional --no-parser, -n, and %no-parser options have been
  completely removed from Bison.

* Changes in version 2.3a, 2006-09-13:

** Instead of %union, you can define and use your own union type
  YYSTYPE if your grammar contains at least one <type> tag.
  Your YYSTYPE need not be a macro; it can be a typedef.
  This change is for compatibility with other Yacc implementations,
  and is required by POSIX.

** Locations columns and lines start at 1.
  In accordance with the GNU Coding Standards and Emacs.

** You may now declare per-type and default %destructor's and %printer's:

For example:

%union { char *string; }
    %token <string> STRING1
    %token <string> STRING2
    %type  <string> string1
    %type  <string> string2
    %union { char character; }
    %token <character> CHR
    %type  <character> chr
    %destructor { free ($$); } %symbol-default
    %destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1
    %destructor { } <character>

guarantees that, when the parser discards any user-defined symbol that has a
  semantic type tag other than "<character>", it passes its semantic value to
  "free".  However, when the parser discards a "STRING1" or a "string1", it
  also prints its line number to "stdout".  It performs only the second
  "%destructor" in this case, so it invokes "free" only once.

[Although we failed to mention this here in the 2.3a release, the default
  %destructor's and %printer's were experimental, and they were rewritten in
  future versions.]

** Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with "-y",
  "--yacc", or "%yacc"), Bison no longer generates #define statements for
  associating token numbers with token names.  Removing the #define statements
  helps to sanitize the global namespace during preprocessing, but POSIX Yacc
  requires them.  Bison still generates an enum for token names in all cases.

** Handling of traditional Yacc prologue blocks is now more consistent but
  potentially incompatible with previous releases of Bison.

As before, you declare prologue blocks in your grammar file with the
  "%{ ... %}" syntax.  To generate the pre-prologue, Bison concatenates all
  prologue blocks that you've declared before the first %union.  To generate
  the post-prologue, Bison concatenates all prologue blocks that you've
  declared after the first %union.

Previous releases of Bison inserted the pre-prologue into both the header
  file and the code file in all cases except for LALR(1) parsers in C.  In the
  latter case, Bison inserted it only into the code file.  For parsers in C++,
  the point of insertion was before any token definitions (which associate
  token numbers with names).  For parsers in C, the point of insertion was
  after the token definitions.

Now, Bison never inserts the pre-prologue into the header file.  In the code
  file, it always inserts it before the token definitions.

** Bison now provides a more flexible alternative to the traditional Yacc
  prologue blocks: %before-header, %start-header, %end-header, and
  %after-header.

For example, the following declaration order in the grammar file reflects the
  order in which Bison will output these code blocks.  However, you are free to
  declare these code blocks in your grammar file in whatever order is most
  convenient for you:

%before-header {
      /* Bison treats this block like a pre-prologue block: it inserts it into
       * the code file before the contents of the header file.  It does *not*
       * insert it into the header file.  This is a good place to put
       * #include's that you want at the top of your code file.  A common
       * example is '#include "system.h"'.  */
    }
    %start-header {
      /* Bison inserts this block into both the header file and the code file.
       * In both files, the point of insertion is before any Bison-generated
       * token, semantic type, location type, and class definitions.  This is a
       * good place to define %union dependencies, for example.  */
    }
    %union {
      /* Unlike the traditional Yacc prologue blocks, the output order for the
       * new %*-header blocks is not affected by their declaration position
       * relative to any %union in the grammar file.  */
    }
    %end-header {
      /* Bison inserts this block into both the header file and the code file.
       * In both files, the point of insertion is after the Bison-generated
       * definitions.  This is a good place to declare or define public
       * functions or data structures that depend on the Bison-generated
       * definitions.  */
    }
    %after-header {
      /* Bison treats this block like a post-prologue block: it inserts it into
       * the code file after the contents of the header file.  It does *not*
       * insert it into the header file.  This is a good place to declare or
       * define internal functions or data structures that depend on the
       * Bison-generated definitions.  */
    }

If you have multiple occurrences of any one of the above declarations, Bison
  will concatenate the contents in declaration order.

[Although we failed to mention this here in the 2.3a release, the prologue
  alternatives were experimental, and they were rewritten in future versions.]

** The option "--report=look-ahead" has been changed to "--report=lookahead".
  The old spelling still works, but is not documented and may be removed
  in a future release.

* Changes in version 2.3, 2006-06-05:

** GLR grammars should now use "YYRECOVERING ()" instead of "YYRECOVERING",
  for compatibility with LALR(1) grammars.

** It is now documented that any definition of YYSTYPE or YYLTYPE should
  be to a type name that does not contain parentheses or brackets.

* Changes in version 2.2, 2006-05-19:

** The distribution terms for all Bison-generated parsers now permit
  using the parsers in nonfree programs.  Previously, this permission
  was granted only for Bison-generated LALR(1) parsers in C.

** %name-prefix changes the namespace name in C++ outputs.

** The C++ parsers export their token_type.

** Bison now allows multiple %union declarations, and concatenates
  their contents together.

** New warning: unused values
  Right-hand side symbols whose values are not used are reported,
  if the symbols have destructors.  For instance:

exp: exp "?" exp ":" exp { $1 ? $1 : $3; }
        | exp "+" exp
        ;

will trigger a warning about $$ and $5 in the first rule, and $3 in
  the second ($1 is copied to $$ by the default rule).  This example
  most likely contains three errors, and could be rewritten as:

exp: exp "?" exp ":" exp
            { $$ = $1 ? $3 : $5; free ($1 ? $5 : $3); free ($1); }
        | exp "+" exp
            { $$ = $1 ? $1 : $3; if ($1) free ($3); }
        ;

However, if the original actions were really intended, memory leaks
  and all, the warnings can be suppressed by letting Bison believe the
  values are used, e.g.:

exp: exp "?" exp ":" exp { $1 ? $1 : $3; (void) ($$, $5); }
        | exp "+" exp         { $$ = $1; (void) $3; }
        ;

If there are mid-rule actions, the warning is issued if no action
  uses it.  The following triggers no warning: $1 and $3 are used.

exp: exp { push ($1); } '+' exp { push ($3); sum (); };

The warning is intended to help catching lost values and memory leaks.
  If a value is ignored, its associated memory typically is not reclaimed.

** %destructor vs. YYABORT, YYACCEPT, and YYERROR.
  Destructors are now called when user code invokes YYABORT, YYACCEPT,
  and YYERROR, for all objects on the stack, other than objects
  corresponding to the right-hand side of the current rule.

** %expect, %expect-rr
  Incorrect numbers of expected conflicts are now actual errors,
  instead of warnings.

** GLR, YACC parsers.
  The %parse-params are available in the destructors (and the
  experimental printers) as per the documentation.

** Bison now warns if it finds a stray "$" or "@" in an action.

** %require "VERSION"
  This specifies that the grammar file depends on features implemented
  in Bison version VERSION or higher.

** lalr1.cc: The token and value types are now class members.
  The tokens were defined as free form enums and cpp macros.  YYSTYPE
  was defined as a free form union.  They are now class members:
  tokens are enumerations of the "yy::parser::token" struct, and the
  semantic values have the "yy::parser::semantic_type" type.

If you do not want or can update to this scheme, the directive
  '%define "global_tokens_and_yystype" "1"' triggers the global
  definition of tokens and YYSTYPE.  This change is suitable both
  for previous releases of Bison, and this one.

If you wish to update, then make sure older version of Bison will
  fail using '%require "2.2"'.

** DJGPP support added.

* Changes in version 2.1, 2005-09-16:

** The C++ lalr1.cc skeleton supports %lex-param.

** Bison-generated parsers now support the translation of diagnostics like
  "syntax error" into languages other than English.  The default
  language is still English.  For details, please see the new
  Internationalization section of the Bison manual.  Software
  distributors should also see the new PACKAGING file.  Thanks to
  Bruno Haible for this new feature.

** Wording in the Bison-generated parsers has been changed slightly to
  simplify translation.  In particular, the message "memory exhausted"
  has replaced "parser stack overflow", as the old message was not
  always accurate for modern Bison-generated parsers.

** Destructors are now called when the parser aborts, for all symbols left
  behind on the stack.  Also, the start symbol is now destroyed after a
  successful parse.  In both cases, the behavior was formerly inconsistent.

** When generating verbose diagnostics, Bison-generated parsers no longer
  quote the literal strings associated with tokens.  For example, for
  a syntax error associated with '%token NUM "number"' they might
  print 'syntax error, unexpected number' instead of 'syntax error,
  unexpected "number"'.

* Changes in version 2.0, 2004-12-25:

** Possibly-incompatible changes

- Bison-generated parsers no longer default to using the alloca function
    (when available) to extend the parser stack, due to widespread
    problems in unchecked stack-overflow detection.  You can "#define
    YYSTACK_USE_ALLOCA 1" to require the use of alloca, but please read
    the manual to determine safe values for YYMAXDEPTH in that case.

- Error token location.
    During error recovery, the location of the syntax error is updated
    to cover the whole sequence covered by the error token: it includes
    the shifted symbols thrown away during the first part of the error
    recovery, and the lookahead rejected during the second part.

- Semicolon changes:
    . Stray semicolons are no longer allowed at the start of a grammar.
    . Semicolons are now required after in-grammar declarations.

- Unescaped newlines are no longer allowed in character constants or
    string literals.  They were never portable, and GCC 3.4.0 has
    dropped support for them.  Better diagnostics are now generated if
    forget a closing quote.

- NUL bytes are no longer allowed in Bison string literals, unfortunately.

** New features

- GLR grammars now support locations.

- New directive: %initial-action.
    This directive allows the user to run arbitrary code (including
    initializing @$) from yyparse before parsing starts.

- A new directive "%expect-rr N" specifies the expected number of
    reduce/reduce conflicts in GLR parsers.

- %token numbers can now be hexadecimal integers, e.g., "%token FOO 0x12d".
    This is a GNU extension.

- The option "--report=lookahead" was changed to "--report=look-ahead".
    [However, this was changed back after 2.3.]

- Experimental %destructor support has been added to lalr1.cc.

- New configure option --disable-yacc, to disable installation of the
    yacc command and -ly library introduced in 1.875 for POSIX conformance.

** Bug fixes

- For now, %expect-count violations are now just warnings, not errors.
    This is for compatibility with Bison 1.75 and earlier (when there are
    reduce/reduce conflicts) and with Bison 1.30 and earlier (when there
    are too many or too few shift/reduce conflicts).  However, in future
    versions of Bison we plan to improve the %expect machinery so that
    these violations will become errors again.

- Within Bison itself, numbers (e.g., goto numbers) are no longer
    arbitrarily limited to 16-bit counts.

- Semicolons are now allowed before "|" in grammar rules, as POSIX requires.

* Changes in version 1.875, 2003-01-01:

** The documentation license has been upgraded to version 1.2
  of the GNU Free Documentation License.

** syntax error processing

- In Yacc-style parsers YYLLOC_DEFAULT is now used to compute error
    locations too.  This fixes bugs in error-location computation.

- %destructor
    It is now possible to reclaim the memory associated to symbols
    discarded during error recovery.  This feature is still experimental.

- %error-verbose
    This new directive is preferred over YYERROR_VERBOSE.

- #defining yyerror to steal internal variables is discouraged.
    It is not guaranteed to work forever.

** POSIX conformance

- Semicolons are once again optional at the end of grammar rules.
    This reverts to the behavior of Bison 1.33 and earlier, and improves
    compatibility with Yacc.

- "parse error" -> "syntax error"
    Bison now uniformly uses the term "syntax error"; formerly, the code
    and manual sometimes used the term "parse error" instead.  POSIX
    requires "syntax error" in diagnostics, and it was thought better to
    be consistent.

- The documentation now emphasizes that yylex and yyerror must be
    declared before use.  C99 requires this.

- Bison now parses C99 lexical constructs like UCNs and
    backslash-newline within C escape sequences, as POSIX 1003.1-2001 requires.

- File names are properly escaped in C output.  E.g., foo\bar.y is
    output as "foo\\bar.y".

- Yacc command and library now available
    The Bison distribution now installs a "yacc" command, as POSIX requires.
    Also, Bison now installs a small library liby.a containing
    implementations of Yacc-compatible yyerror and main functions.
    This library is normally not useful, but POSIX requires it.

- Type clashes now generate warnings, not errors.

- If the user does not define YYSTYPE as a macro, Bison now declares it
    using typedef instead of defining it as a macro.
    For consistency, YYLTYPE is also declared instead of defined.

** Other compatibility issues

- %union directives can now have a tag before the "{", e.g., the
    directive "%union foo {...}" now generates the C code
    "typedef union foo { ... } YYSTYPE;"; this is for Yacc compatibility.
    The default union tag is "YYSTYPE", for compatibility with Solaris 9 Yacc.
    For consistency, YYLTYPE's struct tag is now "YYLTYPE" not "yyltype".
    This is for compatibility with both Yacc and Bison 1.35.

- ";" is output before the terminating "}" of an action, for
    compatibility with Bison 1.35.

- Bison now uses a Yacc-style format for conflict reports, e.g.,
    "conflicts: 2 shift/reduce, 1 reduce/reduce".

- "yystype" and "yyltype" are now obsolescent macros instead of being
    typedefs or tags; they are no longer documented and are planned to be
    withdrawn in a future release.

** GLR parser notes

- GLR and inline
    Users of Bison have to decide how they handle the portability of the
    C keyword "inline".

- "parsing stack overflow..." -> "parser stack overflow"
    GLR parsers now report "parser stack overflow" as per the Bison manual.

** %parse-param and %lex-param
  The macros YYPARSE_PARAM and YYLEX_PARAM provide a means to pass
  additional context to yyparse and yylex.  They suffer from several
  shortcomings:

- a single argument only can be added,
  - their types are weak (void *),
  - this context is not passed to ancillary functions such as yyerror,
  - only yacc.c parsers support them.

The new %parse-param/%lex-param directives provide a more precise control.
  For instance:

%parse-param {int *nastiness}
    %lex-param   {int *nastiness}
    %parse-param {int *randomness}

results in the following signatures:

int yylex   (int *nastiness);
    int yyparse (int *nastiness, int *randomness);

or, if both %pure-parser and %locations are used:

int yylex   (YYSTYPE *lvalp, YYLTYPE *llocp, int *nastiness);
    int yyparse (int *nastiness, int *randomness);

** Bison now warns if it detects conflicting outputs to the same file,
  e.g., it generates a warning for "bison -d -o foo.h foo.y" since
  that command outputs both code and header to foo.h.

** #line in output files
  - --no-line works properly.

** Bison can no longer be built by a K&R C compiler; it requires C89 or
  later to be built.  This change originally took place a few versions
  ago, but nobody noticed until we recently asked someone to try
  building Bison with a K&R C compiler.

* Changes in version 1.75, 2002-10-14:

** Bison should now work on 64-bit hosts.

** Indonesian translation thanks to Tedi Heriyanto.

** GLR parsers
  Fix spurious parse errors.

** Pure parsers
  Some people redefine yyerror to steal yyparse' private variables.
  Reenable this trick until an official feature replaces it.

** Type Clashes
  In agreement with POSIX and with other Yaccs, leaving a default
  action is valid when $$ is untyped, and $1 typed:

untyped: ... typed;

but the converse remains an error:

typed: ... untyped;

** Values of mid-rule actions
  The following code:

foo: { ... } { $$ = $1; } ...

was incorrectly rejected: $1 is defined in the second mid-rule
  action, and is equal to the $$ of the first mid-rule action.

* Changes in version 1.50, 2002-10-04:

** GLR parsing
  The declaration
     %glr-parser
  causes Bison to produce a Generalized LR (GLR) parser, capable of handling
  almost any context-free grammar, ambiguous or not.  The new declarations
  %dprec and %merge on grammar rules allow parse-time resolution of
  ambiguities.  Contributed by Paul Hilfinger.

Unfortunately Bison 1.50 does not work properly on 64-bit hosts
  like the Alpha, so please stick to 32-bit hosts for now.

** Output Directory
  When not in Yacc compatibility mode, when the output file was not
  specified, running "bison foo/bar.y" created "foo/bar.c".  It
  now creates "bar.c".

** Undefined token
  The undefined token was systematically mapped to 2 which prevented
  the use of 2 by the user.  This is no longer the case.

** Unknown token numbers
  If yylex returned an out of range value, yyparse could die.  This is
  no longer the case.

** Error token
  According to POSIX, the error token must be 256.
  Bison extends this requirement by making it a preference: *if* the
  user specified that one of her tokens is numbered 256, then error
  will be mapped onto another number.

** Verbose error messages
  They no longer report "..., expecting error or..." for states where
  error recovery is possible.

** End token
  Defaults to "$end" instead of "$".

** Error recovery now conforms to documentation and to POSIX
  When a Bison-generated parser encounters a syntax error, it now pops
  the stack until it finds a state that allows shifting the error
  token.  Formerly, it popped the stack until it found a state that
  allowed some non-error action other than a default reduction on the
  error token.  The new behavior has long been the documented behavior,
  and has long been required by POSIX.  For more details, please see
  Paul Eggert, "Reductions during Bison error handling" (2002-05-20)
  <http://lists.gnu.org/archive/html/bug-bison/2002-05/msg00038.html>.

** Traces
  Popped tokens and nonterminals are now reported.

** Larger grammars
  Larger grammars are now supported (larger token numbers, larger grammar
  size (= sum of the LHS and RHS lengths), larger LALR tables).
  Formerly, many of these numbers ran afoul of 16-bit limits;
  now these limits are 32 bits on most hosts.

** Explicit initial rule
  Bison used to play hacks with the initial rule, which the user does
  not write.  It is now explicit, and visible in the reports and
  graphs as rule 0.

** Useless rules
  Before, Bison reported the useless rules, but, although not used,
  included them in the parsers.  They are now actually removed.

** Useless rules, useless nonterminals
  They are now reported, as a warning, with their locations.

** Rules never reduced
  Rules that can never be reduced because of conflicts are now
  reported.

** Incorrect "Token not used"
  On a grammar such as

%token useless useful
    %%
    exp: '0' %prec useful;

where a token was used to set the precedence of the last rule,
  bison reported both "useful" and "useless" as useless tokens.

** Revert the C++ namespace changes introduced in 1.31
  as they caused too many portability hassles.

** Default locations
  By an accident of design, the default computation of @$ was
  performed after another default computation was performed: @$ = @1.
  The latter is now removed: YYLLOC_DEFAULT is fully responsible of
  the computation of @$.

** Token end-of-file
  The token end of file may be specified by the user, in which case,
  the user symbol is used in the reports, the graphs, and the verbose
  error messages instead of "$end", which remains being the default.
  For instance
    %token MYEOF 0
  or
    %token MYEOF 0 "end of file"

** Semantic parser
  This old option, which has been broken for ages, is removed.

** New translations
  Brazilian Portuguese, thanks to Alexandre Folle de Menezes.
  Croatian, thanks to Denis Lackovic.

** Incorrect token definitions
  When given
    %token 'a' "A"
  bison used to output
    #define 'a' 65

** Token definitions as enums
  Tokens are output both as the traditional #define's, and, provided
  the compiler supports ANSI C or is a C++ compiler, as enums.
  This lets debuggers display names instead of integers.

** Reports
  In addition to --verbose, bison supports --report=THINGS, which
  produces additional information:
  - itemset
    complete the core item sets with their closure
  - lookahead [changed to "look-ahead" in 1.875e through 2.3, but changed back]
    explicitly associate lookahead tokens to items
  - solved
    describe shift/reduce conflicts solving.
    Bison used to systematically output this information on top of
    the report.  Solved conflicts are now attached to their states.

** Type clashes
  Previous versions don't complain when there is a type clash on
  the default action if the rule has a mid-rule action, such as in:

%type <foo> bar
    %%
    bar: '0' {} '0';

This is fixed.

** GNU M4 is now required when using Bison.

* Changes in version 1.35, 2002-03-25:

** C Skeleton
  Some projects use Bison's C parser with C++ compilers, and define
  YYSTYPE as a class.  The recent adjustment of C parsers for data
  alignment and 64 bit architectures made this impossible.

Because for the time being no real solution for C++ parser
  generation exists, kludges were implemented in the parser to
  maintain this use.  In the future, when Bison has C++ parsers, this
  kludge will be disabled.

This kludge also addresses some C++ problems when the stack was
  extended.

* Changes in version 1.34, 2002-03-12:

** File name clashes are detected
  $ bison foo.y -d -o foo.x
  fatal error: header and parser would both be named "foo.x"

** A missing ";" at the end of a rule triggers a warning
  In accordance with POSIX, and in agreement with other
  Yacc implementations, Bison will mandate this semicolon in the near
  future.  This eases the implementation of a Bison parser of Bison
  grammars by making this grammar LALR(1) instead of LR(2).  To
  facilitate the transition, this release introduces a warning.

** Revert the C++ namespace changes introduced in 1.31, as they caused too
  many portability hassles.

** DJGPP support added.

** Fix test suite portability problems.

* Changes in version 1.33, 2002-02-07:

** Fix C++ issues
  Groff could not be compiled for the definition of size_t was lacking
  under some conditions.

** Catch invalid @n
  As is done with $n.

* Changes in version 1.32, 2002-01-23:

** Fix Yacc output file names

** Portability fixes

** Italian, Dutch translations

* Changes in version 1.31, 2002-01-14:

** Many Bug Fixes

** GNU Gettext and %expect
  GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
  Bison dies on incorrect %expectations, we fear there will be
  too many bug reports for Gettext, so _for the time being_, %expect
  does not trigger an error when the input file is named "plural.y".

** Use of alloca in parsers
  If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
  malloc exclusively.  Since 1.29, but was not NEWS'ed.

alloca is used only when compiled with GCC, to avoid portability
  problems as on AIX.

** yyparse now returns 2 if memory is exhausted; formerly it dumped core.

** When the generated parser lacks debugging code, YYDEBUG is now 0
  (as POSIX requires) instead of being undefined.

** User Actions
  Bison has always permitted actions such as { $$ = $1 }: it adds the
  ending semicolon.  Now if in Yacc compatibility mode, the semicolon
  is no longer output: one has to write { $$ = $1; }.

** Better C++ compliance
  The output parsers try to respect C++ namespaces.
  [This turned out to be a failed experiment, and it was reverted later.]

** Reduced Grammars
  Fixed bugs when reporting useless nonterminals.

** 64 bit hosts
  The parsers work properly on 64 bit hosts.

** Error messages
  Some calls to strerror resulted in scrambled or missing error messages.

** %expect
  When the number of shift/reduce conflicts is correct, don't issue
  any warning.

** The verbose report includes the rule line numbers.

** Rule line numbers are fixed in traces.

** Swedish translation

** Parse errors
  Verbose parse error messages from the parsers are better looking.
  Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
     Now: parse error: unexpected '/', expecting "number" or '-' or '('

** Fixed parser memory leaks.
  When the generated parser was using malloc to extend its stacks, the
  previous allocations were not freed.

** Fixed verbose output file.
  Some newlines were missing.
  Some conflicts in state descriptions were missing.

** Fixed conflict report.
  Option -v was needed to get the result.

** %expect
  Was not used.
  Mismatches are errors, not warnings.

** Fixed incorrect processing of some invalid input.

** Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.

** Fixed some typos in the documentation.

** %token MY_EOF 0 is supported.
  Before, MY_EOF was silently renumbered as 257.

** doc/refcard.tex is updated.

** %output, %file-prefix, %name-prefix.
  New.

** --output
  New, aliasing "--output-file".

* Changes in version 1.30, 2001-10-26:

** "--defines" and "--graph" have now an optional argument which is the
  output file name. "-d" and "-g" do not change; they do not take any
  argument.

** "%source_extension" and "%header_extension" are removed, failed
  experiment.

** Portability fixes.

* Changes in version 1.29, 2001-09-07:

** The output file does not define const, as this caused problems when used
  with common autoconfiguration schemes.  If you still use ancient compilers
  that lack const, compile with the equivalent of the C compiler option
  "-Dconst=".  Autoconf's AC_C_CONST macro provides one way to do this.

** Added "-g" and "--graph".

** The Bison manual is now distributed under the terms of the GNU FDL.

** The input and the output files has automatically a similar extension.

** Russian translation added.

** NLS support updated; should hopefully be less troublesome.

** Added the old Bison reference card.

** Added "--locations" and "%locations".

** Added "-S" and "--skeleton".

** "%raw", "-r", "--raw" is disabled.

** Special characters are escaped when output.  This solves the problems
  of the #line lines with path names including backslashes.

** New directives.
  "%yacc", "%fixed_output_files", "%defines", "%no_parser", "%verbose",
  "%debug", "%source_extension" and "%header_extension".

** @$
  Automatic location tracking.

* Changes in version 1.28, 1999-07-06:

** Should compile better now with K&R compilers.

** Added NLS.

** Fixed a problem with escaping the double quote character.

** There is now a FAQ.

* Changes in version 1.27:

** The make rule which prevented bison.simple from being created on
  some systems has been fixed.

* Changes in version 1.26:

** Bison now uses Automake.

** New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.

** Token numbers now start at 257 as previously documented, not 258.

** Bison honors the TMPDIR environment variable.

** A couple of buffer overruns have been fixed.

** Problems when closing files should now be reported.

** Generated parsers should now work even on operating systems which do
  not provide alloca().

* Changes in version 1.25, 1995-10-16:

** Errors in the input grammar are not fatal; Bison keeps reading
the grammar file, and reports all the errors found in it.

** Tokens can now be specified as multiple-character strings: for
example, you could use "<=" for a token which looks like <=, instead
of choosing a name like LESSEQ.

** The %token_table declaration says to write a table of tokens (names
and numbers) into the parser file.  The yylex function can use this
table to recognize multiple-character string tokens, or for other
purposes.

** The %no_lines declaration says not to generate any #line preprocessor
directives in the parser file.

** The %raw declaration says to use internal Bison token numbers, not
Yacc-compatible token numbers, when token names are defined as macros.

** The --no-parser option produces the parser tables without including
the parser engine; a project can now use its own parser engine.
The actions go into a separate file called NAME.act, in the form of
a switch statement body.

* Changes in version 1.23:

The user can define YYPARSE_PARAM as the name of an argument to be
passed into yyparse.  The argument should have type void *.  It should
actually point to an object.  Grammar actions can access the variable
by casting it to the proper pointer type.

Line numbers in output file corrected.

* Changes in version 1.22:

--help option added.

* Changes in version 1.20:

Output file does not redefine const for C++.

-----

This file is part of Bison, the GNU Parser Generator.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

LocalWords:  yacc YYBACKUP glr GCC lalr ArrayIndexOutOfBoundsException nullptr
 LocalWords:  cplusplus liby rpl fprintf mfcalc Wyacc stmt cond expr mk sym lr
 LocalWords:  IELR ielr Lookahead YYERROR nonassoc LALR's api lookaheads yychar
 LocalWords:  destructor lookahead YYRHSLOC YYLLOC Rhs ifndef YYFAIL cpp sr rr
 LocalWords:  preprocessor initializer Wno Wnone Werror FreeBSD prec livelocks
 LocalWords:  Solaris AIX UX RHEL Tru LHS gcc's Wundef YYENABLE NLS YYLTYPE VCG
 LocalWords:  yyerror cpp's Wunused yylval yylloc prepend yyparse yylex yypush
 LocalWords:  Graphviz xml nonterminals midrule destructor's YYSTYPE typedef ly
 LocalWords:  CHR chr printf stdout namespace preprocessing enum pre include's
 LocalWords:  YYRECOVERING nonfree destructors YYABORT YYACCEPT params enums de
 LocalWords:  struct yystype DJGPP lex param Haible NUM alloca YYSTACK NUL goto
 LocalWords:  YYMAXDEPTH Unescaped UCNs YYLTYPE's yyltype typedefs inline Yaccs
 LocalWords:  Heriyanto Reenable dprec Hilfinger Eggert MYEOF Folle Menezes EOF
 LocalWords:  Lackovic define's itemset Groff Gettext malloc NEWS'ed YYDEBUG YY
 LocalWords:  namespaces strerror const autoconfiguration Dconst Autoconf's FDL
 LocalWords:  Automake TMPDIR LESSEQ ylwrap endif yydebug YYTOKEN YYLSP ival hh
 LocalWords:  extern YYTOKENTYPE TOKENTYPE yytokentype tokentype STYPE lval pdf
 LocalWords:  lang yyoutput dvi html ps POSIX lvalp llocp Wother nterm arg init
 LocalWords:  TOK calc yyo fval Wconflicts parsers yystackp yyval yynerrs
 LocalWords:  Théophile Ranquet Santet fno fnone stype associativity Tolmer
 LocalWords:  Wprecedence Rassoul Wempty Paolo Bonzini parser's Michiel loc
 LocalWords:  redeclaration sval fcaret reentrant XSLT xsl Wmaybe yyvsp Tedi
 LocalWords:  pragmas noreturn untyped Rozenman unexpanded Wojciech Polak
 LocalWords:  Alexandre MERCHANTABILITY yytype

Local Variables:
mode: outline
fill-column: 76
End:
PK��������\Fʚ���������READMEnu��[�����������This package contains the GNU Bison parser generator.

* Installation
** Build
See the file INSTALL for generic compilation and installation
instructions.

Bison requires GNU m4 1.4.6 or later.  See:

ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz

** Internationalization
Bison supports two catalogues: one for Bison itself (i.e., for the
maintainer-side parser generation), and one for the generated parsers
(i.e., for the user-side parser execution).  The requirements between
both differ: bison needs ngettext, the generated parsers do not.  To
simplify the build system, neither are installed if ngettext is not
supported, even if generated parsers could have been localized.  See
http://lists.gnu.org/archive/html/bug-bison/2009-08/msg00006.html for
more details.

* Questions
See the section FAQ in the documentation (doc/bison.info) for
frequently asked questions.  The documentation is also available in
PDF and HTML, provided you have a recent version of Texinfo installed:
run "make pdf" or "make html".

If you have questions about using Bison and the documentation does
not answer them, please send mail to <help-bison@gnu.org>.

* Bug reports
Please send bug reports to <bug-bison@gnu.org>.  Please include the
version number from 'bison --version', and a complete, self-contained
test case in each bug report.

* Copyright statements
For any copyright year range specified as YYYY-ZZZZ in this package,
note that the range specifies every single year in that closed interval.

Local Variables:
mode: outline
End:

-----

This file is part of Bison, the GNU Compiler Compiler.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
PK��������\4�9�!���!����THANKSnu��[�����������Bison was originally written by Robert Corbett.  It would not be what
it is today without the invaluable help of these people:

Aaro Koskinen             aaro.koskinen@iki.fi
Аскар Сафин               safinaskar@mail.ru
Airy Andre                Airy.Andre@edf.fr
Akim Demaille             akim@lrde.epita.fr
Albert Chin-A-Young       china@thewrittenword.com
Alexander Belopolsky      alexb@rentec.com
Alexandre Duret-Lutz      adl@lrde.epita.fr
Andreas Schwab            schwab@suse.de
Andrew Suffield           asuffield@users.sourceforge.net
Angelo Borsotti           angelo.borsotti@gmail.com
Anthony Heading           ajrh@ajrh.net
Antonio Silva Correia     amsilvacorreia@hotmail.com
Arnold Robbins            arnold@skeeve.com
Art Haas                  ahaas@neosoft.com
Baron Schwartz            baron@sequent.org
Ben Pfaff                 blp@cs.stanford.edu
Benoit Perrot             benoit.perrot@epita.fr
Bernd Edlinger            bernd.edlinger@hotmail.de
Bernd Kiefer              kiefer@dfki.de
Bert Deknuydt             Bert.Deknuydt@esat.kuleuven.ac.be
Bill Allombert            Bill.Allombert@math.u-bordeaux1.fr
Bob Rossi                 bob@brasko.net
Brandon Lucia             blucia@gmail.com
Bruce Lilly               blilly@erols.com
Bruno Haible              bruno@clisp.org
Charles-Henri de Boysson  de-boy_c@epita.fr
Christian Burger          cburger@sunysb.edu
Colin Daley               colin.daley@outlook.com
Cris Bailiff              c.bailiff+bison@awayweb.com
Cris van Pelt             cris@amf03054.office.wxs.nl
Csaba Raduly              csaba_22@yahoo.co.uk
Dagobert Michelsen        dam@baltic-online.de
Daniel Frużyński          daniel@poradnik-webmastera.com
Daniel Galloway           dg1751@att.com
Daniel Hagerty            hag@gnu.org
David J. MacKenzie        djm@gnu.org
David Kastrup             dak@gnu.org
Dennis Clarke             dclarke@blastwave.org
Derek M. Jones            derek@knosof.co.uk
Di-an Jan                 dianj@freeshell.org
Dick Streefland           dick.streefland@altium.nl
Didier Godefroy           dg@ulysium.net
Efi Fogel                 efifogel@gmail.com
Enrico Scholz             enrico.scholz@informatik.tu-chemnitz.de
Eric Blake                ebb9@byu.net
Evgeny Stambulchik        fnevgeny@plasma-gate.weizmann.ac.il
Fabrice Bauzac            noon@cote-dazur.com
Florian Krohm             florian@edamail.fishkill.ibm.com
Frank Heckenbach          frank@g-n-u.de
Frans Englich             frans.englich@telia.com
Gabriel Rassoul           gabriel.rassoul@epita.fr
Georg Sauthoff            gsauthof@TechFak.Uni-Bielefeld.DE
George Neuner             gneuner2@comcast.net
Gilles Espinasse          g.esp@free.fr
Goran Uddeborg            goeran@uddeborg.se
Guido Trentalancia        trentalg@aston.ac.uk
H. Merijn Brand           h.m.brand@hccnet.nl
Hans Aberg                haberg@matematik.su.se
Jan Nieuwenhuizen         janneke@gnu.org
Jerry Quinn               jlquinn@optonline.net
Jesse Thilo               jthilo@gnu.org
Jim Kent                  jkent@arch.sel.sony.com
Jim Meyering              jim@meyering.net
Joel E. Denny             joeldenny@joeldenny.org
Johan van Selst           johans@stack.nl
John Horigan              john@glyphic.com
Jonathan Fabrizio         jonathan.fabrizio@lrde.epita.fr
Jonathan Nieder           jrnieder@gmail.com
Juan Manuel Guerrero      juan.guerrero@gmx.de
Kees Zeelenberg           kzlg@users.sourceforge.net
Keith Browne              kbrowne@legato.com
Ken Moffat                zarniwhoop@ntlworld.com
Laurent Mascherpa         laurent.mascherpa@epita.fr
Lie Yan                   lie.yan@kaust.edu.sa
Magnus Fromreide          magfr@lysator.liu.se
Marc Autret               autret_m@epita.fr
Marc Mendiola             mmendiol@usc.edu
Mark Boyall               wolfeinstein@gmail.com
Martin Jacobs             martin.jacobs@arcor.de
Martin Mokrejs            mmokrejs@natur.cuni.cz
Martin Nylin              martin.nylin@linuxmail.org
Matt Kraai                kraai@alumni.cmu.edu
Matt Rosing               rosing@peakfive.com
Michael Catanzaro         mcatanzaro@gnome.org
Michael Felt              mamfelt@gmail.com
Michael Hayes             m.hayes@elec.canterbury.ac.nz
Michael Raskin            7c6f434c@mail.ru
Michel d'Hooge            michel.dhooge@gmail.com
Michiel De Wilde          mdewilde.agilent@gmail.com
Mickael Labau             labau_m@epita.fr
Mike Castle               dalgoda@ix.netcom.com
Mike Sullivan             Mike.sullivan@Oracle.COM
Neil Booth                NeilB@earthling.net
Nelson H. F. Beebe        beebe@math.utah.edu
Nick Bowler               nbowler@elliptictech.com
Nicolas Bedon             nicolas.bedon@univ-rouen.fr
Nicolas Burrus            nicolas.burrus@epita.fr
Nicolas Tisserand         nicolas.tisserand@epita.fr
Noah Friedman             friedman@gnu.org
Odd Arild Olsen           oao@fibula.no
Oleg Smolsky              oleg.smolsky@pacific-simulators.co.nz
Oleksii Taran             oleksii.taran@gmail.com
Paolo Bonzini             bonzini@gnu.org
Paolo Simone Gasparello   djgaspa@gmail.com
Pascal Bart               pascal.bart@epita.fr
Paul Eggert               eggert@cs.ucla.edu
Paul Hilfinger            Hilfinger@CS.Berkeley.EDU
Per Allansson             per@appgate.com
Peter Eisentraut          peter_e@gmx.net
Peter Fales               psfales@lucent.com
Peter Hamorsky            hamo@upjs.sk
Peter Simons              simons@cryp.to
Petr Machata              pmachata@redhat.com
Pho                       pho@cielonegro.org
Piotr Gackiewicz          gacek@intertel.com.pl
Quentin Hocquet           hocquet@gostai.com
Quoc Peyrot               chojin@lrde.epita.fr
R Blake                   blakers@mac.com
Raja R Harinath           harinath@cs.umn.edu
Ralf Wildenhues           Ralf.Wildenhues@gmx.de
Rich Wilson               richaw@gmail.com
Richard Stallman          rms@gnu.org
Rici Lake                 ricilake@gmail.com
Rob Conde                 rob.conde@ai-solutions.com
Rob Vermaas               rob.vermaas@gmail.com
Robert Anisko             anisko_r@epita.fr
Roland Levillain          roland@lrde.epita.fr
Satya Kiran Popuri        satyakiran@gmail.com
Sebastian Setzer          sebastian.setzer.ext@siemens.com
Sebastien Fricker         sebastien.fricker@gmail.com
Sergei Steshenko          sergstesh@yahoo.com
Shura                     debil_urod@ngs.ru
Stefano Lattarini         stefano.lattarini@gmail.com
Stephen Cameron           stephenmcameron@gmail.com
Steve Murphy              murf@parsetree.com
Sum Wu                    sum@geekhouse.org
Théophile Ranquet         theophile.ranquet@gmail.com
Thiru Ramakrishnan        thiru.ramakrishnan@gmail.com
Thomas Jahns              jahns@dkrz.de
Tim Josling               tej@melbpc.org.au
Tim Landscheidt           tim@tim-landscheidt.de
Tim Van Holder            tim.van.holder@pandora.be
Tobias Frost              tobi@debian.org
Tom Lane                  tgl@sss.pgh.pa.us
Tom Tromey                tromey@cygnus.com
Tommy Nordgren            tommy.nordgren@chello.se
Troy A. Johnson           troyj@ecn.purdue.edu
Tys Lefering              gccbison@gmail.com
Valentin Tolmer           nitnelave1@gmail.com
Victor Khomenko           victor.khomenko@newcastle.ac.uk
Vin Shelton               acs@alumni.princeton.edu
W.C.A. Wijngaards         wouter@NLnetLabs.nl
Wayne Green               wayne@infosavvy.com
Wei Song                  wsong83@gmail.com
Wojciech Polak            polak@gnu.org
Wolfgang S. Kechel        wolfgang.kechel@prs.de
Wolfram Wagner            ww@mpi-sb.mpg.de
Wwp                       subscript@free.fr
xolodho                   xolodho@gmail.com
Zack Weinberg             zack@codesourcery.com

Many people are not named here because we lost track of them.  We
thank them!  Please, help us keeping this list up to date.

Local Variables:
mode: text
coding: utf-8
End:

-----

This file is part of Bison, the GNU Parser Generator.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
PK��������\w#�=7��=7����TODOnu��[�����������* Short term
** Graphviz display code thoughts
The code for the --graph option is over two files: print_graph, and
graphviz. This is because Bison used to also produce VCG graphs, but since
this is no longer true, maybe we could consider these files for fusion.

An other consideration worth noting is that print_graph.c (correct me if I
am wrong) should contain generic functions, whereas graphviz.c and other
potential files should contain just the specific code for that output
format. It will probably prove difficult to tell if the implementation is
actually generic whilst only having support for a single format, but it
would be nice to keep stuff a bit tidier: right now, the construction of the
bitset used to show reductions is in the graphviz-specific code, and on the
opposite side we have some use of \l, which is graphviz-specific, in what
should be generic code.

Little effort seems to have been given to factoring these files and their
rint{,-xml} counterpart. We would very much like to re-use the pretty format
of states from .output for the graphs, etc.

Also, the underscore in print_graph.[ch] isn't very fitting considering the
dashes in the other filenames.

Since graphviz dies on medium-to-big grammars, maybe consider an other tool?

** push-parser
Check it too when checking the different kinds of parsers.  And be
sure to check that the initial-action is performed once per parsing.

** m4 names
b4_shared_declarations is no longer what it is.  Make it
b4_parser_declaration for instance.

** yychar in lalr1.cc
There is a large difference bw maint and master on the handling of
yychar (which was removed in lalr1.cc).  See what needs to be
back-ported.

/* User semantic actions sometimes alter yychar, and that requires
       that yytoken be updated with the new translation.  We take the
       approach of translating immediately before every use of yytoken.
       One alternative is translating here after every semantic action,
       but that translation would be missed if the semantic action
       invokes YYABORT, YYACCEPT, or YYERROR immediately after altering
       yychar.  In the case of YYABORT or YYACCEPT, an incorrect
       destructor might then be invoked immediately.  In the case of
       YYERROR, subsequent parser actions might lead to an incorrect
       destructor call or verbose syntax error message before the
       lookahead is translated.  */

/* Make sure we have latest lookahead translation.  See comments at
       user semantic actions for why this is necessary.  */
    yytoken = yytranslate_ (yychar);

** stack.hh
Get rid of it.  The original idea is nice, but actually it makes
the code harder to follow, and uselessly different from the other
skeletons.

** Get rid of fake #lines [Bison: ...]
Possibly as simple as checking whether the column number is nonnegative.

I have seen messages like the following from GCC.

<built-in>:0: fatal error: opening dependency file .deps/libltdl/argz.Tpo: No such file or directory

** Discuss about %printer/%destroy in the case of C++.
It would be very nice to provide the symbol classes with an operator<<
and a destructor.  Unfortunately the syntax we have chosen for
%destroy and %printer make them hard to reuse.  For instance, the user
is invited to write something like

%printer { debug_stream() << $$; } <my_type>;

which is hard to reuse elsewhere since it wants to use
"debug_stream()" to find the stream to use.  The same applies to
%destroy: we told the user she could use the members of the Parser
class in the printers/destructors, which is not good for an operator<<
since it is no longer bound to a particular parser, it's just a
(standalone symbol).

** Rename LR0.cc
as lr0.cc, why upper case?

* Various
** YYERRCODE
Defined to 256, but not used, not documented.  Probably the token
number for the error token, which POSIX wants to be 256, but which
Bison might renumber if the user used number 256.  Keep fix and doc?
Throw away?

Also, why don't we output the token name of the error token in the
output?  It is explicitly skipped:

/* Skip error token and tokens without identifier.  */
      if (sym != errtoken && id)

Of course there are issues with name spaces, but if we disable we have
something which seems to be more simpler and more consistent instead
of the special case YYERRCODE.

enum yytokentype {
     error = 256,
     // ...
   };

We could (should?) also treat the case of the undef_token, which is
numbered 257 for yylex, and 2 internal.  Both appear for instance in
toknum:

const unsigned short int
  parser::yytoken_number_[] =
  {
       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,

while here

enum yytokentype {
     TOK_EOF = 0,
     TOK_EQ = 258,

so both 256 and 257 are "mysterious".

const char*
  const parser::yytname_[] =
  {
  "\"end of command\"", "error", "$undefined", "\"=\"", "\"break\"",

** yychar == yyempty_
The code in yyerrlab reads:

if (yychar <= YYEOF)
        {
          /* Return failure if at end of input.  */
          if (yychar == YYEOF)
            YYABORT;
        }

There are only two yychar that can be <= YYEOF: YYEMPTY and YYEOF.
But I can't produce the situation where yychar is YYEMPTY here, is it
really possible?  The test suite does not exercise this case.

This shows that it would be interesting to manage to install skeleton
coverage analysis to the test suite.

* From lalr1.cc to yacc.c
** Single stack
Merging the three stacks in lalr1.cc simplified the code, prompted for
other improvements and also made it faster (probably because memory
management is performed once instead of three times).  I suggest that
we do the same in yacc.c.

** yysyntax_error
The code bw glr.c and yacc.c is really alike, we can certainly factor
some parts.

* Report

** Figures
Some statistics about the grammar and the parser would be useful,
especially when asking the user to send some information about the
grammars she is working on.  We should probably also include some
information about the variables (I'm not sure for instance we even
specify what LR variant was used).

**  GLR
How would Paul like to display the conflicted actions?  In particular,
what when two reductions are possible on a given lookahead token, but one is
part of $default.  Should we make the two reductions explicit, or just
keep $default?  See the following point.

** Disabled Reductions
See 'tests/conflicts.at (Defaulted Conflicted Reduction)', and decide
what we want to do.

** Documentation
Extend with error productions.  The hard part will probably be finding
the right rule so that a single state does not exhibit too many yet
undocumented ''features''.  Maybe an empty action ought to be
presented too.  Shall we try to make a single grammar with all these
features, or should we have several very small grammars?

** --report=conflict-path
Provide better assistance for understanding the conflicts by providing
a sample text exhibiting the (LALR) ambiguity.  See the paper from
DeRemer and Penello: they already provide the algorithm.

** Statically check for potential ambiguities in GLR grammars.  See
<http://www.i3s.unice.fr/~schmitz/papers.html#expamb> for an approach.

* Extensions

** $-1
We should find a means to provide an access to values deep in the
stack.  For instance, instead of

baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }

we should be able to have:

foo($foo) bar($bar) baz($bar): qux($qux) { $baz = $foo + $bar + $qux; }

Or something like this.

** %if and the like
It should be possible to have %if/%else/%endif.  The implementation is
not clear: should it be lexical or syntactic.  Vadim Maslow thinks it
must be in the scanner: we must not parse what is in a switched off
part of %if.  Akim Demaille thinks it should be in the parser, so as
to avoid falling into another CPP mistake.

** XML Output
There are couple of available extensions of Bison targeting some XML
output.  Some day we should consider including them.  One issue is
that they seem to be quite orthogonal to the parsing technique, and
seem to depend mostly on the possibility to have some code triggered
for each reduction.  As a matter of fact, such hooks could also be
used to generate the yydebug traces.  Some generic scheme probably
exists in there.

XML output for GNU Bison and gcc
   http://www.cs.may.ie/~jpower/Research/bisonXML/

XML output for GNU Bison
   http://yaxx.sourceforge.net/

* Unit rules
Maybe we could expand unit rules, i.e., transform

exp: arith | bool;
        arith: exp '+' exp;
        bool: exp '&' exp;

into

exp: exp '+' exp | exp '&' exp;

when there are no actions.  This can significantly speed up some
grammars.  I can't find the papers.  In particular the book 'LR
parsing: Theory and Practice' is impossible to find, but according to
'Parsing Techniques: a Practical Guide', it includes information about
this issue.  Does anybody have it?

* Documentation

** History/Bibliography
Some history of Bison and some bibliography would be most welcome.
Are there any Texinfo standards for bibliography?

* Coding system independence
Paul notes:

Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is
        255).  It also assumes that the 8-bit character encoding is
        the same for the invocation of 'bison' as it is for the
        invocation of 'cc', but this is not necessarily true when
        people run bison on an ASCII host and then use cc on an EBCDIC
        host.  I don't think these topics are worth our time
        addressing (unless we find a gung-ho volunteer for EBCDIC or
        PDP-10 ports :-) but they should probably be documented
        somewhere.

More importantly, Bison does not currently allow NUL bytes in
        tokens, either via escapes (e.g., "x\0y") or via a NUL byte in
        the source code.  This should get fixed.

* Broken options ?
** %token-table
** Skeleton strategy
Must we keep %token-table?

* Precedence

** Partial order
It is unfortunate that there is a total order for precedence.  It
makes it impossible to have modular precedence information.  We should
move to partial orders (sounds like series/parallel orders to me).

** RR conflicts
See if we can use precedence between rules to solve RR conflicts.  See
what POSIX says.

* $undefined
From Hans:
- If the Bison generated parser experiences an undefined number in the
character range, that character is written out in diagnostic messages, an
addition to the $undefined value.

Suggest: Change the name $undefined to undefined; looks better in outputs.

* Default Action
From Hans:
- For use with my C++ parser, I transported the "switch (yyn)" statement
that Bison writes to the bison.simple skeleton file. This way, I can remove
the current default rule $$ = $1 implementation, which causes a double
assignment to $$ which may not be OK under C++, replacing it with a
"default:" part within the switch statement.

Note that the default rule $$ = $1, when typed, is perfectly OK under C,
but in the C++ implementation I made, this rule is different from
$<type_name>$ = $<type_name>1. I therefore think that one should implement
a Bison option where every typed default rule is explicitly written out
(same typed ruled can of course be grouped together).

* Pre and post actions.
From: Florian Krohm <florian@edamail.fishkill.ibm.com>
Subject: YYACT_EPILOGUE
To: bug-bison@gnu.org
X-Sent: 1 week, 4 days, 14 hours, 38 minutes, 11 seconds ago

The other day I had the need for explicitly building the parse tree. I
used %locations for that and defined YYLLOC_DEFAULT to call a function
that returns the tree node for the production. Easy. But I also needed
to assign the S-attribute to the tree node. That cannot be done in
YYLLOC_DEFAULT, because it is invoked before the action is executed.
The way I solved this was to define a macro YYACT_EPILOGUE that would
be invoked after the action. For reasons of symmetry I also added
YYACT_PROLOGUE. Although I had no use for that I can envision how it
might come in handy for debugging purposes.
All is needed is to add

#if YYLSP_NEEDED
    YYACT_EPILOGUE (yyval, (yyvsp - yylen), yylen, yyloc, (yylsp - yylen));
#else
    YYACT_EPILOGUE (yyval, (yyvsp - yylen), yylen);
#endif

at the proper place to bison.simple. Ditto for YYACT_PROLOGUE.

I was wondering what you think about adding YYACT_PROLOGUE/EPILOGUE
to bison. If you're interested, I'll work on a patch.

* Better graphics
Equip the parser with a means to create the (visual) parse tree.

* Complaint submessage indentation.
We already have an implementation that works fairly well for named
reference messages, but it would be nice to use it consistently for all
submessages from Bison.  For example, the "previous definition"
submessage or the list of correct values for a %define variable might
look better with indentation.

However, the current implementation makes the assumption that the
location printed on the first line is not usually much shorter than the
locations printed on the submessage lines that follow.  That assumption
may not hold true as often for some kinds of submessages especially if
we ever support multiple grammar files.

Here's a proposal for how a new implementation might look:

http://lists.gnu.org/archive/html/bison-patches/2009-09/msg00086.html

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