X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/5210672f6b8c2b5e8c78dcf07919b56c8469164f..6b7022680ea084a5d63e73614e40647f2d0dcce9:/ChangeLog

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+2006-01-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Fix a longstanding bug uncovered by bro-0.9a9/src/parse.y, which I
+	got from <http://bro-ids.org/download.html>.  The bug is that
+	when two actions appeared in succession, the second one was
+	scanned before the first one was added to the grammar rule
+	as a midrule action.  Bison then output the incorrect warning
+	"parse.y:905.17-906.36: warning: unused value: $3".
+	* src/parse-gram.y (BRACED_CODE, action): These are no longer
+	associated with a value.
+	(rhs): Don't invoke grammar_current_rule_action_append.
+	(action): Invoke it here instead.
+	* src/reader.c (grammar_midrule_action): Now extern.
+	(grammar_current_rule_action_append): Don't invoke
+	grammar_midrule_action; that is now the scanner's job.
+	* src/reader.h (last_string, last_braced_code_loc):
+	(grammar_midrule_action): New decls.
+	* src/scan-gram.l (last_string): Now extern, sigh.
+	(last_braced_code_loc): New extern variable.
+	(<INITIAL>"{"): Invoke grammar_midrule_action if the current
+	rule already has an action.
+	(<SC_BRACED_CODE>"}"): Set last_braced_code_loc before returning.
+	* tests/input.at (AT_CHECK_UNUSED_VALUES):
+	Add some tests to check that the above changes fixed the bug.
+
+2006-01-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* src/reader.c (symbol_should_be_used): Renamed from symbol_typed_p.
+	All used changed.  Check whether the symbol has a destructor,
+	not whether it is typed.
+	* tests/input.at (AT_CHECK_UNUSED_VALUES): Add a destructor, so
+	that the values are still reported as unused.  All line numbers
+	adjusted.
+
+2006-01-23  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Work around a bug in bro 0.8, which underparenthesizes its
+	definition of YYLLOC_DEFAULT.
+	* data/glr.c: Change all uses of YYLLOC_DEFAULT to parenthesize
+	their arguments.
+	* data/lalr1.cc: Likewise.
+	* data/yacc.cc: Likewise.
+
+2006-01-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Work around a bug in Pike 7.0, and give the Pike folks a
+	better way to override the usual int widths.
+	* data/yacc.c (b4_int_type): Use yytype_uint8, etc., so that the
+	user can override the types.
+	(short): #undef, to work around a bug in Pike 7.0.
+	(yytype_uint8, yytype_int8, yytype_uint16, yytype_int16): New types.
+	(union yyalloc.yyss): Use yytype_int16 rather than short.
+	All uses changed.
+	(yysigned_char): Remove.
+	* src/parse-gram.y (YYTYPE_UINT8, YYTYPE_INT8, YYTYPE_UINT16):
+	(YYTYPE_INT16): New macros, to test the new facility in yacc.c.
+	* tests/regression.at (Web2c Actions): Adjust to above changes.
+
+	* src/reader.c (check_and_convert_grammar): New function.
+	(reader): Close the input file even if something went wrong during
+	parsing.  Minor file descriptor leak reported by twlevo.
+
+	* src/assoc.c (assoc_to_string): Use a default: abort (); case
+	to pacify gcc -Wswitch-default.
+	* src/scan-gram.l (adjust_location): Use a default: break; case
+	to pacify gcc -Wswitch-default.
+	* src/scan-skel.h (skel_get_lineno, skel_get_in, skel_get_out):
+	(skel_get_leng, skel_get_text, skel_set_lineno, skel_set_in):
+	(skel_set_out, skel_get_debug, skel_set_debug, skel_lex_destroy):
+	Move these decls to scan-skel.l, since they don't need to be
+	visible elsewhere.
+	* src/scan-skel.l: Accept the above decls.
+	(skel_lex): New decl, to pacify GCC when unpatched flex 2.5.31
+	is used.
+
+2006-01-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* Makefile.cfg (local-checks-to-skip): Add changelog-check,
+	since we don't want to insist on a version number at the start
+	of the changelog every time.
+	* Makefile.maint: Sync from coreutils a bit better.
+	(sc_trailing_blank): Renamed from sc_trailing_space.
+	All uses changed.
+	(sc_no_if_have_config_h, sc_require_config_h):
+	(sc_prohibit_assert_without_use): New rules.
+	(sc_obsolete_symbols): Don't catch Makefile.maint itself.
+	(sc_dd_max_sym_length): Fix leading spaces in rule.
+	(sc_system_h_headers): Prefix with @.
+	(sc_useless_cpp_parens, m4-check): Output line numbers.
+	(changelog-check): Allow version only in head.
+	* data/c.m4: Use "defined FOO" instead of "defined (FOO)", to
+	satisfy new Makefile.maint rule.
+	* data/glr.c: Likewise.
+	* data/glr.cc: Likewise.
+	* data/lalr1.cc: Likewise.
+	* data/yacc.c: Likewise.
+	* lib/ebitsetv.c: Likewise.
+	* lib/lbitset.c: Likewise.
+	* lib/subpipe.c: Likewise.
+	* lib/timevar.c: Likewise.
+	* src/system.h: Likewise.
+	* data/yacc.c (YYSTYPE): Don't generate trailing spaces in output.
+	* djgpp/Makefile.maint: Add copyright notice.
+	* djgpp/README.in: Likewise.
+	* djgpp/config.bat: Likewise.
+	* djgpp/config.site: Likewise.
+	* djgpp/config_h.sed: Likewise.
+	* djgpp/djunpack.bat: Likewise.
+	* djgpp/config.sed: Fix copyright notice to match standard format.
+	* djgpp/subpipe.h: Likewise.
+	* lib/bitsetv-print.c: Likewise.
+	* lib/bitsetv.c: Likewise.
+	* lib/subpipe.h: Likewise.
+	* lib/timevar.c: Likewise.
+	* lib/timevar.h: Likewise.
+	* djgpp/subpipe.c: Use standard recipe for config.h.
+	* lib/abitset.c: Likewise.
+	* lib/bitset.c: Likewise.
+	* lib/bitset_stats.c: Likewise.
+	* lib/bitsetv-print.c: Likewise.
+	* lib/bitsetv.c: Likewise.
+	* lib/ebitsetv.c: Likewise.
+	* lib/get-errno.c: Likewise.
+	* lib/lbitset.c: Likewise.
+	* lib/subpipe.c: Likewise.
+	* lib/timevar.c: Likewise.
+	* lib/vbitset.c: Likewise.
+	* tests/local.at: Likewise.
+	* src/scan-gram.l: Don't include verify.h, since system.h does
+	that for us.
+	* .x-sc_require_config_h: New file.
+	* .x-sc_unmarked_diagnostics: New file.
+
+2006-01-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Be a bit more systematic about using 'abort'.
+	* lib/abitset.c (abitset_test): Remove ATTRIBUTE_UNUSED; not needed.
+	* lib/bitset.c (bitset_bytes, bitset_init, bitset_op4_cmp):
+	Put 'default: abort ();' before some other case, to satisfy older
+	pedantic compilers.
+	* lib/bitset_stats.c (bitset_stats_init): Likewise.
+	* lib/ebitset.c (ebitset_elt_find, ebitset_op3_cmp): Likewise.
+	* lib/lbitset.c (lbitset_elt_find, lbitset_op3_cmp): Likewise.
+	* src/conflicts.c (resolve_sr_conflict): Likewise.
+	* src/vcg.c (get_color_str, get_textmode_str, get_shape_str):
+	(get_decision_str, get_orientation_str, get_node_alignment_str):
+	(get_arrow_mode_str, get_crossing_type_str, get_view_str):
+	(get_linestyle_str, get_arrowstyle_str): Likewise.
+	* src/conflicts.c (resolve_sr_conflict):
+	Use a default case rather than one for the one remaining enum
+	value, to catch invalid enum values as well.
+	* src/lalr.c (set_goto_map, map_goto):
+	Prefer "assert (FOO);" to "if (!FOO) abort ();".
+	* src/nullable.c (nullable_compute, token_definitions_output):
+	Likewise.
+	* src/reader.c (packgram, reader): Likewise.
+	* src/state.c (transitions_to, state_new, state_reduction_find):
+	Likewise.
+	* src/symtab.c (symbol_user_token_number_set, symbol_make_alias):
+	(symbol_pack): Likewise.
+	* src/tables.c (conflict_row, pack_vector): Likewise.
+	* src/scan-skel.l (QPUTS): Remove unnecessary parens.
+	(BASE_QPUTS, "@output ".*\n): Remove unnecessary asserts.
+	* src/system.h: Don't include <assert.h>.
+	(assert): New macro.
+
+	* doc/bison.texinfo (Prologue, Rules, Actions, Union Decl, Action Decl):
+	(Destructor Decl, Parser Function, Pure Calling):
+	Describe rules for braces inside C code more carefully.
+
+2006-01-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Fix some porting glitches found by Nelson H. F. Beebe.
+	* lib/abitset.c (abitset_resize): Rewrite to avoid warnings from
+	compilers that don't understand that abort () does not return.
+	* src/state.c (transitions_to): Likewise.
+	* m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Check
+	that '#include <cstdlib>' works.
+	* src/system.h (INT8_MIN, INT16_MIN, INT32_MIN, INT8_MAX):
+	(INT16_MAX, UINT8_MAX, INT32_MAX, UINT16_MAX, UINT32_MAX):
+	#undef if ! defined __STDC_VERSION__ || __STDC_VERSION__ < 199901,
+	for the benefit of some pre-C99 compilers.
+
+	* bootstrap: Undo changes to gnulib files that autoreconf made.
+
+	Minor fixups to get 'make maintainer-check' to work.
+	* configure.ac: Don't use -Wnested-externs, as it's incompatible
+	with the new verify.h implementation.
+	* data/c.m4 (b4_yy_symbol_print_generate): YYUSE (yyoutput).
+	* data/glr.c (YYUSE): Depend on __GNUC__ as well.
+	* data/yacc.c (YYUSE): Likewise.
+	* data/lalr1.cc (yysyntax_error_): YYUSE (yystate).
+	* lib/subpipe.c (end_of_output_subpipe): The args are unused.
+	* src/parse-gram.y (declaration): Don't pass a string constant
+	to a function that expects char *, since GCC might complain
+	about the constant value.
+	* src/reader.c (symbol_typed_p): Add parens to pacify GCC.
+	* tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): #undef yylloc and yylval
+	before #defining them.
+	* tests/glr-regression.at
+	(Incorrectly initialized location for empty right-hand side in GLR):
+	In yyerror, use the msg arg.
+	(Corrupted semantic options if user action cuts parse):
+	(Incorrect lookahead during deterministic GLR):
+	(Incorrect lookahead during nondeterministic GLR):
+	Don't name a local var 'index'; it shadows string.h's 'index'.
+
+2006-01-19  Akim Demaille  <akim@epita.fr>
+
+	* tests/calc.at (_AT_DATA_CALC_Y): Initialize the whole initial
+	location, not just parts of it.
+
+2006-01-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Document the fact that multiple %unions are now allowed.
+	* doc/bison.texinfo (Union Decl): Likewise.
+	* TODO: This feature is now implemented, so remove it from
+	the wishlist.
+
+	* Makefile.maint: Merge with coreutils Makefile.maint.
+	(CVS_LIST): Use build-aux version if available.
+	(VERSION_REGEXP): New macro.
+	(syntax-check-rules): Add sc_no_if_have_config_h,
+	sc_prohibit_assert_without_use, sc_require_config_h,
+	sc_useless_cpp_parens.
+	(sc_obsolete_symbols): Check for O_NDELAY.
+	(sc_dd_max_sym_length): Track coreutils.
+	(sc_unmarked_diagnostics): Look in all files, not just *.c.
+	(sc_useless_cpp_parens): New rule.
+	(news-date-check): Look for version or today's date.
+	(changelog-check): Don't require version number near head.
+	(copyright-check): Use current year instead of hardwiring 2005.
+	(my-distcheck): Depend on $(release_archive_dir)/$(prev-tgz).
+	(announcement): Add --gpg-key-ID.
+
+	* djgpp/config.sed: Add copyright notice, and replace "filesystem"
+	with "file system".
+
+	Avoid undefined behavior that addressed just before the start of an
+	array.  Problem reported by twlevo.
+	* src/reader.c (packgram): Prepend a new sentinel before ritem.
+	* src/lalr.c (build_relations): Rely on new sentinel.
+	* src/gram.c (gram_free): Adjust to new sentinel.
+
+2006-01-12  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* data/glr.c (yyGLRStateSet): Rename yylookaheadStatuses to
+	yylookaheadNeeds.  All uses updated.
+	(yysplitStack): Rename local yynewLookaheadStatuses to
+	yynewLookaheadNeeds.
+	* data/glr-regression.at (Incorrect lookahead during nondeterministic
+	GLR): In comments, change `lookahead status' to `lookahead need'.
+
+2006-01-11  Paul Hilfinger  <hilfingr@tully.CS.Berkeley.EDU>
+
+	* data/glr.c (yysplitStack): A little stylistic rewrite.
+
+2006-01-11  Paul Hilfinger  <hilfingr@tully.CS.Berkeley.EDU>
+
+	* data/glr.c (yyaddDeferredAction): Flesh out the comment.
+
+2006-01-11  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* doc/bison.texinfo: Fix some typos.
+	(GLR Semantic Actions): New subsection discussing special
+	considerations because GLR semantic actions might be deferred.
+	(Actions): Mention look-ahead usage of yylval.
+	(Actions and Locations): Mention look-ahead usage of yylloc.
+	(Special Features for Use in Actions): Add YYEOF entry and mention it
+	in the yychar entry.
+	In the yychar entry, remove mention of the local yychar case (pure
+	parser) since this is irrelevant information when writing semantic
+	actions and since it's already discussed in `Bison Symbols' where
+	yychar is otherwise described as an external variable.
+	In the yychar entry, don't call it the `current' look-ahead since it
+	isn't when semantic actions are deferred.
+	In the yychar and yyclearin entries, add note about deferred semantic
+	actions.
+	Add yylloc and yylval entries discussing look-ahead usage.
+	(Look-Ahead Tokens): When discussing yychar, don't call it the
+	`current' look-ahead, and do mention yylval and yylloc.
+	(Error Recovery): Cross-reference `Action Features' when mentioning
+	yyclearin.
+	(Bison Symbols): In the yychar entry, don't call it the `current'
+	look-ahead.
+	In the yylloc and yylval entries, mention look-ahead usage.
+
+2006-01-08  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* tests/glr-regression.at: Update copyright year to 2006.
+
+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* data/glr.c (yyGLRStateSet): Add yybool* yylookaheadStatuses member to
+	use during nondeterministic operation to track which stacks have
+	actually needed the current lookahead.
+	(yyinitStateSet, yyfreeStateSet, yyremoveDeletes, yysplitStack):
+	Allocate, deallocate, resize, and otherwise shuffle space for
+	yylookaheadStatuses in parallel with yystates member of yyGLRStateSet.
+	(yysplitStack, yyprocessOneStack, yyparse): Set lookahead status
+	appropriately during nondeterministic operation.
+	(yySemanticOption): Add int yyrawchar, YYSTYPE yyval, and YYLTYPE yyloc
+	members to store the current lookahead to be used by the deferred
+	user action.
+	(yyaddDeferredAction): Add size_t yyk parameter specifying the stack
+	from which the RHS is taken.  Set the lookahead members of the new
+	yySemanticOption according to the lookahead status for stack yyk.
+	(yyglrShiftDefer, yyglrReduce): Pass yyk parameter on to
+	yyaddDeferredAction.
+	(yyresolveAction): Set yychar, yylval, and yylloc to the lookahead
+	members of yySemanticOption before invoking yyuserAction, and then set
+	them back to their current values afterward.
+	(yyparse): Set yychar = YYEMPTY where yytoken = YYEMPTY.
+	(yyreportAmbiguity): Add /*ARGSUSED*/ to pacify lint.
+	* tests/glr-regression.at: Remove `.' from the ends of recent test case
+	titles for consistency.
+	(Leaked merged semantic value if user action cuts parse): In order to
+	suppress lint warnings, use arguments in merge function, and assign
+	char value < 128 in main.
+	(Incorrect lookahead during deterministic GLR): New test case.
+	(Incorrect lookahead during nondeterministic GLR): New test case.
+
+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* data/c.m4 (b4_yy_symbol_print_generate): In yy_symbol_print, accept
+	!yyvaluep as signal that no semantic value is available to print.
+	* data/glr.c (yydestroyGLRState): If state is not resolved, don't try
+	to print a semantic value.
+
+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* tests/glr-regression.at: For consistency with my newer test cases,
+	don't thank myself.
+
+2006-01-05  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* data/glr.c (yyresolveValue): When merging semantic options, if at
+	least one user action succeeds but a later one cuts the parse, then
+	destroy the semantic value before returning rather than leaking it.
+	(yyresolveStates): If a user action cuts the parse and thus
+	yyresolveValue fails, ignore the (unset) semantic value rather than
+	corrupting the yyGLRState, and empty the semantic options list since
+	the user actions should have called all necessary destructors.
+	Simplify code with YYCHK.
+	* tests/glr-regression.at (Corrupted semantic options if user action
+	cuts parse): New test case.
+	(Undesirable destructors if user action cuts parse): New test case.
+	Before applying any of this patch, this test case never actually failed
+	for me... but only because the corrupted semantic options usually
+	masked this bug.
+	(Leaked merged semantic value if user action cuts parse): New test
+	case.
+
+2006-01-05  Akim Demaille  <akim@epita.fr>
+
+	* src/reader.c, src/symlist.h, src/symlist.c: s/mid_rule/midrule/.
+
+2006-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* data/c.m4 (b4_c_modern): New macro, with a new provision for
+	_MSC_VER.  Problem reported by Cenzato Marco.
+	(b4_c_function_def): Use it.
+	* data/yacc.c (YYMODERN_C): Remove.  All uses replaced by
+	b4_c_modern.
+	(yystrlen, yystpcpy, yyparse): Use b4_c_function... macros rather
+	than rolling our own.
+
+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+	Also warn about non-used mid-rule values.
+	* src/symlist.h, src/symlist.c (symbol_list): Add a mid_rule
+	member.
+	(symbol_list_new): Adjust.
+	* src/reader.c (symbol_typed_p): New.
+	(grammar_rule_check): Use it.
+	(grammar_midrule_action): Bind a mid-rule LHS to its rule.
+	Check its rule.
+	* tests/input.at (AT_CHECK_UNUSED_VALUES): New.
+	Use it.
+	* tests/actions.at (Exotic Dollars): Adjust.
+
+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+	* src/reader.c (grammar_midrule_action): If $$ is set in a
+	mid-rule, move the `used' bit to its lhs.
+	* tests/input.at (Unused values): New.
+	* tests/actions.at (Exotic Dollars): Adjust: exp is not typed.
+
+2006-01-03  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* doc/bison.texinfo (Bison Options): Say more accurately what
+	--yacc does.
+	* src/parse-gram.y (rules_or_grammar_declaration): Don't complain
+	about declarations in the grammar when in Yacc mode, as POSIX does
+	not require a diagnostic when the grammar uses extensions.
+
+	* src/reduce.c (reduce_grammar): Remove unnecessary cast to bool.
+
+	Warn about dubious constructions like "%token T T".
+	Reported by twlevo.
+	* src/symtab.h (struct symbol.declared): New member.
+	* src/symtab.c (symbol_new): Initialize it to false.
+	(symbol_class_set): New arg DECLARING, specifying whether
+	this is a declaration that we want to warn about, if there
+	is more than one of them.  All uses changed.
+
+	* data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c:
+	Allow multiple %union directives, whose contents concatenate.
+	* src/parse-gram.y (grammar_declaration): Likewise.
+	Use muscle_code_grow, so that we don't need stype_line any more.
+	All uses changed.
+
+	* src/muscle_tab.c (muscle_grow): Fix comment.
+
+	* ChangeLog, data/c.m4, data/glr.c, data/glr.cc, data/location.cc:
+	* data/yacc.c, src/getargs.c, src/output.c, tests/cxx-type.at:
+	Update copyright year to 2006.
+
+2006-01-03  Akim Demaille  <akim@epita.fr>
+
+	Have glr.cc pass (some of) the calc.at tests.
+	* data/glr.cc (b4_parse_param_orig): New.
+	(b4_parse_param): Improve its definition, and bound it more
+	clearly in the skeleton.
+	(b4_epilogue): Append, instead of prepending, in order to keep
+	#line consistency.
+	Simplify the generation of auxiliary functions: locations and
+	purity are mandated.
+	(b4_global_tokens_and_yystype): Honor it.
+	* data/location.cc (c++.m4): Don't include it.
+	* tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Define AT_GLR_CC_IF
+	and AT_SKEL_CC_IF.
+	* tests/calc.at (AT_CHECK_CALC): Rely on AT_SKEL_CC_IF instead of
+	AT_LALR1_CC_IF.
+	Be sure to initialize the first position's filename.
+	(AT_CHECK_CALC_LALR1_CC): Add %location and %defines, they are
+	mandated anyway.
+	(AT_CHECK_CALC_GLR_CC): New.
+	Use it to exercise glr.cc as a lalr1.cc drop-in replacement.
+
+2006-01-02  Akim Demaille  <akim@epita.fr>
+
+	* src/output.c (output_skeleton): Don't hard wire the inclusion of
+	c.m4.
+	* data/c++.m4, data/glr.c, data/yacc.c: Include c.m4.
+	* data/glr.cc: Do not include stack.hh.
+
+2006-01-02  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* data/glr.c: Reformat whitespace with tabs.
+	(b4_lpure_formals): Remove this unused m4 macro.
+	* tests/cxx-type.at: Reformat whitespace with tabs.
+	(_AT_TEST_GLR_CXXTYPES): In union Node, rename node_info to nodeInfo
+	since it's a member.  Rename type to isNterm for clarity.
+
+2005-12-29  Akim  <akim@sulaco.local>
+
+	Let glr.cc catch up with symbol_value_print.
+	* data/glr.cc (b4_yysymprint_generate): Replace by...
+	(b4_yy_symbol_print_generate): this.
+	(yy_symbol_print, yy_symbol_value_print): Declare them.
+
+2005-12-28  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* src/location.h (boundary): Note that a line or column equal
+	to INT_MAX indicates an overflow.
+	* src/scan-gram.l: Include verify.h.  Don't include get-errno.h.
+	(rule_length_overflow, increment_rule_length, add_column_width):
+	New functions.
+	(<INITIAL>{id}, <SC_ESCAPED_STRING>"\"", <SC_ESCAPED_CHARACTER>"'"):
+	(<SC_BRACED_CODE>"}"):
+	Use increment_rule_length rather than incrementing it by hand.
+	(adjust_location, handle_syncline): Diagnose overflow.
+	(handle_action_dollar, handle_action_at):
+	Fix bug with monstrosities like $-2147483648.
+	Remove now-unnecessary checks.
+	(scan_integer): Verify assumptions and remove now-unnecessary checks.
+	(convert_ucn_to_byte): Verify assumptions.
+	(handle_syncline): New arg LOC.  All callers changed.
+	Don't store through a value derived from char const * pointer.
+
+	* src/reader.c (grammar_rule_check): Rewrite slightly to avoid
+	GCC warnings.
+
+2005-12-27  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* src/reader.c (grammar_midrule_action, grammar_symbol_append):
+	Remove unnecessary forward static decls.
+
+2005-12-27  Akim Demaille  <akim@epita.fr>
+
+	* src/reader.c (grammar_current_rule_check): Also check that $$
+	is used.
+	Take the rule to check as argument, hence rename as...
+	(grammar_rule_check): this.
+	* src/reader.h, src/reader.c (grammar_rule_begin, grammar_rule_end):
+	Rename as...
+	(grammar_rule_begin, grammar_rule_end): these, for consistency.
+	(grammar_midrule_action, grammar_symbol_append): Now static.
+	* tests/torture.at (input): Don't rely on the default action
+	being always performed.
+	* tests/calc.at: "Set" $$ even when the action is "cut" with
+	YYERROR or other.
+	* tests/actions.at (Exotic Dollars): Instead of using unused
+	values, check that the warning is issued.
+
+2005-12-22  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Improve wording for unused-value warnings.
+
+2005-12-22  Akim Demaille  <akim@epita.fr>
+
+	* data/lalr1.cc, data/yacc.c, data/glr.c, data/c.m4
+	(b4_yysymprint_generate): Rename as...
+	(b4_yy_symbol_print_generate): this.
+	Generate yy_symbol_print instead of yysymprint.
+	Generate also yy_symbol_value_print, and use it.
+
+2005-12-22  Akim Demaille  <akim@epita.fr>
+
+	* NEWS: Warn about unused values.
+	* src/symlist.h, src/symlist.c (symbol_list, symbol_list_new): Add
+	a `used' member.
+	(symbol_list_n_get, symbol_list_n_used_set): New.
+	(symbol_list_n_type_name_get): Use symbol_list_n_get.
+	* src/scan-gram.l (handle_action_dollar): Flag used symbols.
+	* src/reader.c (grammar_current_rule_check): Check that values are
+	used.
+	* src/symtab.c (symbol_print): Accept 0.
+	* tests/existing.at: Remove the type information.
+	Empty the actions.
+	Remove useless actions (beware of mid-rule actions: perl -000
+	-pi -e 's/\s*\{\}(?=[\n\s]*[|;])//g').
+	* tests/actions.at (Exotic Dollars): Use unused values.
+	* tests/calc.at: Likewise.
+	* tests/glr-regression.at (No users destructors if stack 0 deleted):
+	Likewise.
+
+	* src/gram.c (rule_useful_p, rule_never_reduced_p): Use
+	rule_useful_p.
+
+2005-12-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Undo 2005-12-01 tentative license wording change.  The wording is
+	still being reviewed by the lawyers, and we don't want to wait for
+	them before publishing a test release.  For now, revert to the
+	previous wording.
+	* NEWS: Undo 2005-12-01 change.
+	* data/glr.c: Revert to previous license wording.
+	* data/glr.cc: Likewise.
+	* data/lalr1.cc: Likewise.
+	* data/location.cc: Likewise.
+	* data/yacc.c: Likewise.
+
+	* NEWS: Reword %destructor vs YYABORT etc.
+	* data/glr.c: Use American spacing, for consistency.
+	* data/glr.cc: Likewise.
+	* data/lalr1.cc: Likewise.
+	* data/yacc.c: Likewise.
+	* data/yacc.c: Reformat comments slightly.
+	* doc/bison.texinfo: Replace "non-" with "non" when that makes sense,
+	for consistency.  Fix some spelling errors and reword recently-included
+	text slightly.
+	* tests/cxx-type.at: Cast results of malloc, for C++.
+
+2005-12-21  Joel E. Denny  <address@hidden>
+
+	* tests/cxx-type.at: Construct a tree, count the parents of shared
+	nodes, and free each node once and only once.  Previously, the memory
+	for semantic values was leaked instead.
+
+2005-12-21  Joel E. Denny  <address@hidden>
+
+	* data/glr.c (struct yyGLRStack): If pure, add yyval and yyloc members.
+	(yylval, yylloc): If pure, #define to yystackp->yyval and
+	yystackp->yyloc similar to yychar and yynerrs.
+	(yyparse): If pure, remove local yylval and yylloc. Add local
+	yystackp to accommodate pure definitions of yylval and yylloc.
+	(b4_lex_param, b4_lyyerror_args, b4_lpure_args): If pure, change
+	yylvalp and yyllocp to &yylval and &yylloc.
+	(nerrs, char, lval, lloc): If pure, add #define's for b4_prefix[]
+	namespace. Previously, nerrs and char were missing, but lval and lloc
+	weren't necessary.
+	(yyprocessOneStack, yyreportSyntaxError, yyrecoverSyntaxError): Remove
+	yylvalp and yyllocp parameters since, if pure, these are now always
+	accessible through yystackp.  If not pure, they are still accessible
+	globally.
+	* data/glr.c, data/yacc.c (YYLLOC_DEFAULT): Change `if (N)' to
+	`if (YYID (N))' to pacify lint.
+
+2005-12-21  Akim Demaille  <akim@epita.fr>
+
+	YYACCEPT, YYERROR, and YYABORT, as user actions, should not
+	destroy the RHS symbols of a rule.
+	* data/yacc.c (yylen): Initialize to 0.
+	Keep its value to the number of items to possibly shift.
+	In particular, a regular successful parse that ends on YYFINAL by
+	a (internal) YYACCEPT must not have yylen != 0.
+	(yyerrorlab, yyreturn): Pop the RHS.
+	Reorder a bit to emphasize the `shifting' bits of code.
+	(YYPOPSTACK): Now accept a number of items to pop.
+	* data/lalr1.cc: Likewise.
+	* data/glr.c: Formatting changes.
+	Use goto instead of fall through.
+	* doc/bison.texinfo (Destructor Decl): Complete.
+
+2005-12-20  Juan Manuel Guerrero  <juan.guerrero@gmx.de>
+
+	* Makefile.am: DJGPP specific files added to EXTRA_DIST.
+	* djgpp/Makefile.maint: Fix PACKAGE variable computation.
+	* djgpp/config.bat: Replace every occurence of the file name
+	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
+	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
+	* djgpp/config.sed: Replace every occurence of the file name
+	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
+	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
+	* djgpp/djunpack.bat: DJGPP specific file.
+	* djgpp/fnchange.lst: DJGPP specific file.
+	* djgpp/README.in: Add new information about how to unpack the bison
+	source on MSDOS and other systems which have 8.3 file name restrictions
+	using djunpack.bat and fnchange.lst.
+
+2005-12-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* bootstrap (build_cvs_prefix): Remove; unused.
+	(CVS_PREFIX): Adjust to yesterday's Savannah reorganization
+	when getting gnulib.
+
+2005-12-12  "Joel E. Denny" <jdenny@ces.clemson.edu>
+
+	* data/glr.c: Reorder typedef declarations for structs to match order
+	of struct declarations.
+	Rename yystack everywhere to yystackp except in yyparse where it's not
+	a pointer.
+	(yyglrShift): Change parameter YYSTYPE yysval to YYSTYPE* yyvalp for
+	consistency.
+	(yyis_table_ninf): Change 0 to YYID (0) to pacify lint.
+	(yyreportSyntaxError): Add /*ARGSUSED*/ to pacify lint.
+	(yyparse): Change while (yytrue) to while ( YYID (yytrue)) to pacify
+	lint.
+
+2005-12-09  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* tests/sets.at (Accept): Fix typos in regular expression used to
+	sed out the final state number.
+
+	Work around portability problem on Solaris 10: flex-generated
+	files include <stdio.h> before <config.h>, which messes up
+	because the latter defines __EXTENSIONS__.  Address the problem
+	by creating two new little files that include <config.h> first,
+	then include the flex-generated files.  Rewrite everyone else
+	to include <config.h> first, as well.
+	* lib/timevar.c: Always include "config.h".
+	* src/Makefile.am (bison_SOURCES): Replace scan-gram.l with
+	scan-gram-c.c, and scan-skel.l with scan-skel-c.c.
+	(EXTRA_bison_SOURCES): New macro.
+	* src/scan-gram-c.c, src/scan-skel-c.c: New files.
+	* src/system.h: Don't include config.h.
+	* src/LR0.c: Include <config.h> first.
+	* src/assoc.c: Likewise.
+	* src/closure.c: Likewise.
+	* src/complain.c: Likewise.
+	* src/conflicts.c: Likewise.
+	* src/derives.c: Likewise.
+	* src/files.c: Likewise.
+	* src/getargs.c: Likewise.
+	* src/gram.c: Likewise.
+	* src/lalr.c: Likewise.
+	* src/location.c: Likewise.
+	* src/main.c: Likewise.
+	* src/muscle_tab.c: Likewise.
+	* src/nullable.c: Likewise.
+	* src/output.c: Likewise.
+	* src/parse-gram.y: Likewise.
+	* src/print.c: Likewise.
+	* src/print_graph.c: Likewise.
+	* src/reader.c: Likewise.
+	* src/reduce.c: Likewise.
+	* src/relation.c: Likewise.
+	* src/state.c: Likewise.
+	* src/symlist.c: Likewise.
+	* src/symtab.c: Likewise.
+	* src/tables.c: Likewise.
+	* src/uniqstr.c: Likewise.
+	* src/vcg.c: Likewise.
+
+	* src/parse-gram.y: Fix minor problems uncovered by lint.
+	(current_lhs, current_lhs_location): Now static.
+	(current_assoc): Remove unused variable.
+
+	Cleanups so that Bison-generated parsers have less lint.
+	* data/c.m4 (b4_yydestruct_generate, b4_yysymprint_generate):
+	Prepend /*ARGSUSED*/, for lint's sake.
+	* data/glr.c (YYUSE): Properly parenthesize, and use an alternate
+	definition if 'lint' is defined.
+	(YYID): New macro (or function, if lint).
+	All uses of /*CONSTCOND*/0 replaced by YYID(0).
+	* data/yacc.c: Likewise.
+	* data/glr.c (yyuserAction, yyuserMerge, yy_reduce_print):
+	(yyrecoverSyntaxError): Prepend /*ARGSUSED*/.
+	* data/glr.cc (YYLLOC_DEFAULT): Omit /*CONSTCOND*/ since this code
+	is C++ only.
+	* data/lalr1.cc (YYUSE): Just use a cast, since this code is C++ only.
+	* data/yacc.c (YYSTACK_FREE) [defined YYSTACK_ALLOC]:
+	Use YYID(0) rather than 0, for lint.
+	(yystrlen): Rewrite to avoid lint warning about ptrdiff_t overflow.
+	(yysyntax_error): Rewrite to avoid lint warnings about parenthesization.
+
+2005-12-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* tests/glr-regression.at
+	(Improper handling of embedded actions and dollar(-N) in GLR parsers):
+	Close memory leak reported by twlevo.
+
+2005-12-06  "Joel E. Denny" <jdenny@ces.clemson.edu>
+
+	* data/glr.c (yyprocessOneStack, yyparse): Synchronize the shift for
+	all stacks.
+	(yyparse): Iterate another stack in order to call user destructors.
+	* tests/glr-regression.at (No users destructors if stack 0 deleted):
+	New test case.
+	(Duplicated user destructor for lookahead): This test now is expected
+	to succeed.
+
+2005-12-01  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: Document the following change.
+	* data/yacc.c: Say "parser skeleton" rather than "file", since
+	it's no longer just a file.
+	* data/glr.c: Grant a special exception for C GLR parsers, that
+	reads like the already-existing exception for C LALR(1) parsers.
+	* data/glr.cc: Likewise.
+	* data/lalr1.cc: Likewise.
+	* data/location.cc: Likewise.
+	* data/yacc.c: Reword the "written by" statement to clarify that
+	it was the parser skeleton, not the entire output file.
+	* data/glr.c: Written by Paul Hilfinger.
+	* data/glr.cc: Written by Akim Demaille.
+	* data/lalr1.cc: Likewise.
+
+2005-11-18  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* data/yacc.c (yy_reduce_print, YY_REDUCE_PRINT):
+	Fix typos in previous change that broke 'make check'.
+	YY_REDUCE_PRINT cannot be a pseudo-varargs macro; that isn't
+	supported in C.
+	* tests/calc.at (_AT_CHECK_CALC,_AT_CHECK_CALC_ERROR):
+	Don't check NUM-STDERR-LINES, since the output format is fluctuating.
+	We can revert this once things settle down.
+
+	* src/conflicts.c (conflicts_print): Don't print file name twice
+	when %expect fails because there were no conflicts.
+	* doc/bison.texinfo (Expect Decl): Tighten up wording in previous
+	change.
+	* tests/conflicts.at (%expect not enough, %expect too much):
+	(%expect with reduce conflicts): Adjust to new behavior.
+
+2005-11-18  Akim Demaille  <akim@epita.fr>
+
+	* src/conflicts.c (conflicts_print): Unsatisfied %expectation are
+	errors.
+	* NEWS: Document this.
+	* doc/bison.texinfo (Expect Decl): Likewise.
+
+2005-11-16  Akim Demaille  <akim@epita.fr>
+
+	Generalize the display of semantic values and locations in traces.
+	* data/glr.c (yy_reduce_print): Fix indices (again).
+	* data/c++.m4 (b4_rhs_value, b4_rhs_location): Don't expect
+	literal integers.
+	* data/lalr1.cc (yyreduce_print): Rename as...
+	(yy_reduce_print): this.
+	Display values and locations.
+	* data/yacc.c (yy_reduce_print): Likewise.
+	(YY_REDUCE_PRINT): Adjust to pass the required arguments.
+	(yysymprint): Move higher to be visible from yy_reduce_print).
+	(yyparse): Adjust.
+	* tests/calc.at: Adjust the expected length of the traces.
+
+2005-11-14  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.c (yy_reduce_print): The loop was quite wrong: type are
+	from 1 to N, while values and location start at 0.
+	(b4_rhs_location, b4_rhs_value): Add parens around $1 and $2.
+
+2005-11-14  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.c (yy_reduce_print): Fix the $ number.
+
+2005-11-14  Akim Demaille  <akim@epita.fr>
+
+	"Use" parse parameters.
+	* data/c.m4 (b4_parse_param_for, b4_parse_param_use): New.
+	* data/glr.c, data/glr.cc: Use them.
+	* data/glr.c (YYUSE): Have a C++ definition that supports
+	non-pointer types.
+
+2005-11-14  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.c (yyexpandGLRStack): Declare only if defined.
+
+2005-11-14  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.cc: New.
+	* data/m4sugar/m4sugar.m4 (m4_prepend): New.
+
+2005-11-12  Akim Demaille  <akim@epita.fr>
+
+	Let position and location be PODs.
+	* data/location.cc (position::initialize, location::initialize): New.
+	(position::position, location::location): Define only if
+	b4_location_constructors is defined.
+	* data/lalr1.cc (b4_location_constructors): Define it for backward
+	compatibility.
+	* doc/bison.texinfo (Initial Action Decl): Use initialize.
+
+2005-11-12  Akim Demaille  <akim@epita.fr>
+
+	* data/lalr1.cc: Move the body of the ctor and dtor into the
+	parser file (instead of the header).
+	Wrap the implementations in a "namespace yy".
+
+2005-11-12  Akim Demaille  <akim@epita.fr>
+
+	Have glr.c include its header file when created.
+	* data/glr.c (b4_shared_declarations): New.
+	Output them verbatim in the parser if !%defines, otherwise
+	output then in the header file, and include it instead.
+
+2005-11-11  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.c: Comment changes.
+
+2005-11-11  Akim Demaille  <akim@epita.fr>
+
+	When yydebug, report semantic and location values for reductions.
+	* data/glr.c (yy_reduce_print): Report the semantic values and the
+	locations.
+	(YY_REDUCE_PRINT): Adjust.
+	(yyglrReduce): Use them.
+	(b4_rhs_value, b4_rhs_location): Remove m4_eval invocations.
+	* data/c.m4 (b4_yysymprint_generate): Specify the const arguments.
+	* tests/calc.at (_AT_CHECK_CALC_ERROR): Remove the reduction
+	traces.
+
+2005-11-10  Akim Demaille  <akim@epita.fr>
+
+	* data/glr.c (yynewGLRStackItem, YY_RESERVE_GLRSTACK): New.
+	(yyaddDeferredAction, yyglrShift, yyglrShiftDefer): Use them.
+	(yyexpandGLRStack, YYRELOC): Define only when YYSTACKEXPANDABLE.
+
 2005-11-09  Albert Chin-A-Young  <china@thewrittenword.com>
 
 	* m4/cxx.m4, examples/Makefile.am: Don't build
@@ -417,7 +1268,7 @@
 
 2005-09-19  Akim Demaille  <akim@epita.fr>
 
-	* NEWS, configure.ac: Bump to 2.1a.
+	* NEWS, configure.ac: Version 2.1a.
 
 2005-09-16  Paul Eggert  <eggert@cs.ucla.edu>
 
@@ -14662,8 +15513,8 @@
 	-----
 
 	Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996,
-	1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software
-	Foundation, Inc.
+	1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free
+	Software Foundation, Inc.
 
 	Copying and distribution of this file, with or without
 	modification, are permitted provided the copyright notice and this