changelog

bison 2.0 主要可以用来做语法分析用的

	Get files from the gnulib and po repositories, instead of relying
	on them being in our CVS.  Upgrade to latest versions of gnulib
	and Automake.

	* Makefile.am (SUBDIRS): Remove m4; Automake now does m4.
	* bootstrap: Bootstrap from gnulib and po repositories.
	Much of this code was stolen from GNU diff and GNU tar's bootstrap.
	* README-cvs: Document these changes.  Remove version numbers from
	mentions of build tools, since they change so often.  Mention Flex.

	* configure.ac (AC_CONFIG_MACRO_DIR): Add, with m4 as arg.
	(gl_USE_SYSTEM_EXTENSIONS): Add.
	(AC_GNU_SOURCE, AC_AIX, AC_MINIX):
	Remove; no longer needed, as gl_USE_SYSTEM_EXTENSIONS
	does this for us.
	(AC_ISC_POSIX): Remove; we no longer support this
	ancient OS, as it gets in the way of latest Autoconf & gnulib.
	(AC_HEADER_STDC): Remove: we now assume C89 or better.
	(AC_CHECK_HEADERS_ONCE): Use instead of AC_CHECK_HEADERS.
	Do not check for C89 headers, except for locale.h which is used
	by the Yacc library and must port to K&R hosts.
	(AC_CHECK_FUNCS_ONCE): Use instead of AC_CHECK_FUNCS.
	Do not check for C89 functions, except for setlocale which is
	used by the Yacc library.
	(AC_CHECK_DECLS, AC_REPLACE_FUNCS): Remove; no longer needed.
	(gl_DIRNAME, gl_ERROR, gl_FUNC_ALLOCA, gl_FUNC_MEMCHR,
	gl_FUNC_MEMRCHR, gl_FUNC_STPCPY, gl_FUNC_STRNLEN, gl_FUNC_STRTOL,
	gl_GETOPT, gl_HASH, gl_MBSWIDTH, gl_OBSTACK, gl_QUOTE,
	gl_QUOTEARG, gl_XALLOC, jm_FUNC_GLIBC_UNLOCKED_IO, jm_FUNC_MALLOC,
	AM_GNU_GETTEXT): Remove; now done by:
	(GNULIB_AUTOCONF_SNIPPET): Add.  "bootstrap" builds this for us.
	(AC_CONFIG_FILES): Remove m4/Makefile, as Automake now does this
	for us.

	* lib/Makefile.am: Include gnulib.mk, built for us by "bootstrap".
	(BUILT_SOURCES, EXTRA_DIST, MOSTLYCLEANFILES):
	Define to empty, as gnulib.mk will do the rest for us.
	($(libbison_a_OBJECTS), stdbool.h): Remove, as gnulib.mk does this
	for us.
	(libbison_a_SOURCES): Define to $(lib_SOURCES) now.
	(lib_SOURCES): New symbol, containing only the non-gnulib libs.

	* src/files.c: Include gnulib's xstrndup.h.

	* src/system.h (MALLOC): Use xnmalloc, for better overflow checking.
	(REALLOC): Use xnrealloc, for likewise.
	(xstrndup, stpcpy): Remove decls, as gnulib does this for us now.
	(strnlen, memrchr): Remove decls; functions no longer used.
	Include <stpcpy.h>.

	* config/depcomp, config/install-sh, lib/alloca.c, lib/argmatch.c,
	lib/argmatch.h, lib/basename.c, lib/dirname.c, lib/dirname.h,
	lib/error.c, lib/error.h, lib/getopt.c, lib/getopt.h,
	lib/getopt1.c, lib/gettext.h, lib/hash.c, lib/hash.h,
	lib/malloc.c, lib/mbswidth.c, lib/mbswidth.h, lib/memchr.c,
	lib/memcmp.c, lib/memrchr.c, lib/obstack.c, lib/obstack.h,
	lib/quote.c, lib/quote.h, lib/quotearg.c, lib/quotearg.h,
	lib/realloc.c, lib/stdbool_.h, lib/stpcpy.c, lib/strcasecmp.c,
	lib/strchr.c, lib/strncasecmp.c, lib/strnlen.c, lib/strrchr.c,
	lib/strspn.c, lib/strtol.c, lib/strtoul.c, lib/unlocked-io.h,
	lib/xalloc.h, lib/xmalloc.c, lib/xstrdup.c, lib/xstrndup.c,
	m4/Makefile.am, m4/alloca.m4, m4/dirname.m4, m4/dos.m4,
	m4/error.m4, m4/getopt.m4, m4/hash.m4, m4/malloc.m4,
	m4/mbrtowc.m4, m4/mbswidth.m4, m4/memchr.m4, m4/memcmp.m4,
	m4/memrchr.m4, m4/obstack.m4, m4/onceonly.m4, m4/prereq.m4,
	m4/quote.m4, m4/quotearg.m4, m4/realloc.m4, m4/stdbool.m4,
	m4/stpcpy.m4, m4/strnlen.m4, m4/strtol.m4, m4/strtoul.m4,
	m4/unlocked-io.m4, m4/xalloc.m4, po/LINGUAS, po/Makefile.in.in,
	po/Makevars, po/da.po, po/de.po, po/es.po, po/et.po, po/fr.po,
	po/hr.po, po/id.po, po/it.po, po/ja.po, po/ms.po, po/nl.po,
	po/pt_BR.po, po/ro.po, po/ru.po, po/sv.po, po/tr.po:
	Remove, as these files are now generated automatically
	by bootstrap or automake.

	* po/ChangeLog: Remove: all but one entry was a duplicate
	of this file, and I moved that 2000-11-02 entry here.

	* config/.cvsignore: Add Makefile, depcomp, install-sh.
	* lib/.cvsignore: Add alloca.c, alloca.h, alloca_.h, argmatch.c,
	argmatch.h, basename.c, dirname.c, dirname.h, error.c, error.h,
	exit.h, exitfail.c, exitfail.h, getopt.c, getopt.h, getopt1.c,
	getopt_int.h, gettext.h, gnulib.mk, hard-locale.c, hard-locale.h,
	hash.c, hash.h, malloc.c, mbswidth.c, mbswidth.h, memchr.c,
	memcmp.c, memrchr.c, obstack.c, obstack.h, quote.c, quote.h,
	quotearg.c, quotearg.h, realloc.c, stdbool_.h, stpcpy.c, stpcpy.h,
	strcasecmp.c, strchr.c, stripslash.c, strncasecmp.c, strndup.c,
	strnlen.c, strrchr.c, strspn.c, strtol.c, strtoul.c,
	unlocked-io.h, xalloc.h, xmalloc.c, xstrdup.c, xstrndup.c,
	xstrndup.h.
	* m4/.cvsignore: Remove Makefile, Makefile.in.  Add alloca.m4,
	dirname.m4, dos.m4, error.m4, getopt.m4, hash.m4, mbrtowc.m4,
	mbswidth.m4, obstack.m4, onceonly.m4, quote.m4, quotearg.m4,
	stdbool.m4, stpcpy.m4, strnlen.m4, unlocked-io.m4, xalloc.m4.
	* po/.cvsignore: Add *.po, LINGUAS, Makefile.in.in, Makevars.
	* src/.cvsignore: Remove *_.c.


	* Makefile.maint (GZIP_ENV): Don't use --rsyncable if gzip doesn't
	support it.  (The latest stable gzip doesn't.)

2004-04-27  Paul Eggert  <[e-mail]>

	* data/lalr1.cc (Parser::stos_) [! YYDEBUG]: Define even in this
	case, as stos_ is now used by destructors due to the 2004-02-09
	change.

	Remove more K&R C support.
	* lib/libiberty.y (PARAMS): Remove.  All uses removed.
	* lib/subpipe.c (errno): Remove decl.
	Include <stdlib.h> unconditionally.
	(EXIT_FAILURE): Remove macro.
	* src/complain.c (vfprintf, strerror): Remove.
	* src/system.h: Include limits.h, stdlib.h, string.h, locale.h
	unconditionally.
	(EXIT_FAILURE, EXIT_SUCCESS, setlocale): Remove defns.
	Use latest Autoconf recommendations for including inttypes.h, stdint.h.
	(strchr, strspn, memchr): Remove decls.
	* tests/calc.at (_AT_DATA_CALC_Y): Include stdlib.h, string.h
	unconditionally.  Do not declare perror.
	* tests/conflicts.at (%nonassoc and eof): Include stdlib.h
	unconditionally.

	* src/complain.c (_): Remove useless defn, as system.h defines this.

	* lib/bitset.h (__INT_TO_PTR): Remove; workaround no longer needed
	with latest obstack.h.
	* lib/ebitset.c (ebitset_elt_alloc): Don't bother to cast args
	to procedure types, as obstack.h now does that for us.
	* lib/lbitset.c (lbitset_elt_alloc): Likewise.

	* lib/subpipe.h [HAVE_SYS_TYPES_H]: Include <sys/types.h>,
	so that this include file can stand alone.
	* lib/subpipe.c: Do not include <sys/types.h>, as subpipe.h
	does this now.  Include subpipe.h first after config.h, to
	test whether it can stand alone.

	* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Don't
	declare yyerror when using lalr.cc, as GCC 3.4.0 warns about the
	unused declaration.

	* tests/synclines.at (%union synch line): Put a dummy member in
	the union, because empty unions aren't allowed in C.  Caught
	by GCC 3.4.0.

2004-04-13  Jim Meyering  <[e-mail]>

	* src/conflicts.c (conflicts_print): Correct format string typo:
	use `%%' to produce literal `%'.  (trivial change)

2004-03-30  Paul Eggert  <[e-mail]>

	* src/getargs.c (version): Update copyright year to 2004.

	* data/c.m4 (b4_int_type): Use 'short int' rather than
	'short', and similarly for 'long', 'unsigned', etc.
	* data/glr.c (YYTRANSLATE, yyconfl, yySymbol, yyItemNum,
	yygetLRActions, yyprocessOneStack, yyrecoverSyntaxError,
	yy_yypstack, yydumpstack): Likewise.
	* data/lalr1.cc (user_token_number_max_, user_token_number_max_,
	translate_, seq_, [], pop, Slice, range_, operator+, operator+=):
	Likewise.
	* data/yacc.c (b4_int_type, yyss, YYSTACK_BYTES, yysigned_char,
	yy_stack_print, yyparse): Likewise.
	* doc/bison.texinfo (Prologue, Multiple Types): Likewise.
	* lib/bbitset.h (bitset_word, BITSET_WORD_BITS): Likewise.
	* lib/bitset.c (bitset_print): Likewise.
	* lib/bitset_stats.c (bitste_log_histogram_print): Likewise.
	* lib/bitsetv-print.c (bitsetv_matrix_dump): Likewise.
	* lib/bitsetv.c (bitsetv_dump): Likewise.
	* lib/ebitset.c (EBITSET_ELT_BITS, ebitset_elt_alloc): Likewise.
	* lib/lbitset.c (LBITSET_ELT_BITS, lbitset_elt_alloc, debug_lbitset):
	Likewise.
	* src/LR0.c (allocate_itemsets): Likewise.
	* src/gram.h (rule_number, rule): Likewise.
	* src/lalr.h (goto_number): Likewise.
	* src/nullable.c (nullable_compute): Likewise.
	* src/output.c (prepare_rules): Likewise.
	* src/relation.c (relation_print, relation_digraph): Likewise.
	* src/relation.h (relation_node): Likewise.
	* src/state.h (state_number, transitions, errs, reductions,
	struct state): Likewise.
	* src/symtab.h (symbol_number, struct symbol): Likewise.
	* src/tables.c (vector_number, tally, action_number,
	default_goto, goto_actions): Likewise.
	* tests/existing.at (GNU Cim Grammar): Likewise.
	* tests/regression.at (Web2c Actions): Likewise.

	* src/output.c (muscle_insert_short_int_table): Renamed from
	muscle_insert_short_table.  All uses changed.

2004-03-25  Paul Hilfinger  <[e-mail]>

	* src/parse-gram.y: Define PERCENT_EXPECT_RR.
	(declaration): Replace expected_conflicts with expected_sr_conflicts.
	Add %expect-rr rule.

	* src/scan-gram.l: Recognize %expect-rr.

	* src/conflicts.h (expected_sr_conflicts): Rename from
	expected_conflicts.
	(expected_rr_conflicts): Declare.

	* src/conflicts.c (expected_sr_conflicts): Rename from
	expected_conflicts.
	(expected_rr_conflicts): Define.
	(conflicts_print): Check r/r conflicts against expected_rr_conflicts
	for GLR parsers.
	Use expected_sr_conflicts in place of expected_conflicts.
	Warn if expected_rr_conflicts used in non-GLR parser.

	* doc/bison.texinfo: Add documentation for %expect-rr.

2004-03-08  Paul Eggert  <[e-mail]>

	Add support for hex token numbers.  Suggested by Odd Arild Olsen in
	<http://lists.gnu.org/archive/html/bison-patches/2004-03/msg00000.html>.

	* NEWS: Document hexadecimal tokens, no NUL bytes, %destructor
	in lalr1.cc.
	* doc/bison.texinfo (Token Decl): Add hexadecimal token numbers.
	* src/scan-gram.l (scan_integer): New function.
	({int}): Use it.
	(0[xX][0-9abcdefABCDEF]+): New pattern, to support hex numbers.
	(<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>, \\x[0-9abcdefABCDEF]+,
	handle_action_dollar, handle_action_at, convert_ucn_to_byte):
	Say "long int", not "long", for uniformity with GNU style.

2004-02-25  Paul Eggert  <[e-mail]>

	* tests/local.at (AT_COMPILE, AT_COMPILE_CXX): Ignore stdout from
	compilers.  This fixes a problem with Intel's C++ compiler being
	chatty, reported by Guido Trentalancia in
	<http://lists.gnu.org/archive/html/bug-bison/2004-02/msg00030.html>.

2004-02-09  Alexandre Duret-Lutz  <[e-mail]>

	Support %destructor and merge error locations in lalr1.cc.

	* data/lalr1.cc (b4_cxx_destruct_def): New macro.
	(Parser::stos_): Define unconditionally.
	(Parser::destruct_): New method.  Generate its body with
	b4_yydestruct_generate.
	(Parser::error_start_): New attribute.
	(Parser::parse) <yyerrlab, yyerrlab1>: Call destruct_ on erroneous
	token which are discarded.
	(Parser::parse) <yyerrlab, yyerrorlab, yyerrlab1>: Update
	error_start_ when erroneous token are discarded.
	(Parser::parse) <yyerrlab1>: Compute the location of the error
	token so that it covers all the discarded tokens.
	* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust so
	it can be called with `%skeleton "lalr1.cc"', and do that.

2004-02-02  Paul Eggert  <[e-mail]>

	* src/Makefile.am (AM_CPPFLAGS): New macro.  It mentions
	$(top_srcdir)/lib and ../lib.  This fixes a bug reported
	by Paul Hilfinger; the old INCLUDES value didn't mention ../lib.
	There's no need to mention top_builddir since Automake does that
	for us.
	(INCLUDES): Remove, as Automake says it's obsolescent.
	Contents migrated into AM_CPPFLAGS as described above.
	* lib/Makefile.am (INCLUDES): Remove; obsolescent.

2004-01-14  Paul Hilfinger  <[e-mail]>

	* data/glr.c (yytokenName): Bullet-proof against YYEMPTY token.
	(yyreportSyntaxError): Handle case where lookahead token is
	YYEMPTY.

2004-01-13  Paul Hilfinger  <[e-mail]>

	* data/glr.c: Put casts on uses of YYREALLOC and YYMALLOC so that
	resulting parsers are compilable with C++.

2003-12-23  Paul Eggert  <[e-mail]>

	* config/depcomp, config/install-sh: Sync with Automake 1.8.
	* src/output.c (output_skeleton): Rename local var.
	* tests/input.at (Torturing the Scanner): Don't use \x0 or \0 in
	Bison tokens, as this runs afoul of the 2003-10-07 change that
	disallowed NUL bytes in character constants or string literals.

	* tests/local.at: Require Autoconf 2.59's Autotest.
	* tests/testsuite.at: Don't include local.at, since we now assume
	Autoconf 2.59 or later.  Autoconf 2.59 had some problems with
	including it.
	* tests/Makefile.am ($(TESTSUITE)): Remove warning about ignoring
	multiple inclusion warnings.

2003-12-02  Akim Demaille  <[e-mail]>

	* doc/bison.texinfo (How Can I Reset the Parser): More about start
	conditions.
	From Bruno Haible.

2003-11-18  Alexandre Duret-Lutz  <[e-mail]>

	* doc/bison.texinfo (Bison Options): Escape `@' in `$@'.

2003-10-07  Paul Eggert  <[e-mail]>

	* tests/Makefile.am (clean-local): Don't run 'testsuite --clean'
	if testsuite doesn't exist.

	* doc/bison.texinfo (Symbols): NUL bytes are not allowed in string
	literals, unfortunately.
	* src/scan-gram.l (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>):
	Complain about NUL bytes in character constants or string literals.

2003-10-05  Paul Eggert  <[e-mail]>

	* NEWS: Don't document %no-default-prec, as it's still
	too experimental.
	* doc/bison.texinfo: Document %no-default-prec only if
	the defaultprec flag is set.  Normally it's not.

2003-10-04  Paul Eggert  <[e-mail]>

	* data/glr.c (b4_rhs_value, b4_rhs_location): Yield a
	non-modifiable lvalue, instead of a modifiable one.
	* doc/bison.texinfo (Actions): Document that $$ can
	be assigned to.  Do not claim that $$ and $N are
	array element references: user code should not rely on this.

2003-10-01  Paul Eggert  <[e-mail]>

	* src/parse-gram.h (PERCENT_NO_DEFAULT_PREC): New token.
	(grammar_declaration): Use it.
	* src/scan-gram.l: New token %no-default-prec.
	* tests/conflicts.at: Revamp tests to use %no-default-prec.