changelog

bison源代码.bison 是替代yacc的语法分析程序生成器. yacc是 Yet Another Compiler Compiler的缩写. bison又是什么呐 是一个生成可以分析文本文件结构

	* system.h: Include string.h instead of strings.h (a la USG).

	* vmsgetargs.c: Add support for all switches added to bison.cld.

Sun Jun 21 15:53:26 1992  Richard Stallman  ([e-mail])

	* Makefile.in (install): Always specify new file name for install.
	Redirect awk output to temp file and install that.

Wed May 27 22:27:50 1992  Richard Stallman  ([e-mail])

	* bison.simple (yyparse): Make yybackup and yyerrlab1 always be used.

Fri May 22 14:58:42 1992  Richard Stallman  ([e-mail])

	* Makefile.in (dist): Depend on bison.info
	(bison.info): Delete spurious <.

Sun May 17 21:48:55 1992  Richard Stallman  ([e-mail])

	* Makefile.in (.c.o): New rule.  Use $(DEFS) directly.
	(CFLAGS): Use just -g by default.
	(CDEBUG): Variable deleted.

Thu May  7 00:03:37 1992  Richard Stallman  ([e-mail])

	* reader.c (copy_guard): Fix typo skipping comment.

Mon May  4 01:23:21 1992  Richard Stallman  ([e-mail])

	* Version 1.18.

	* getargs.c (getargs): Change '0' to 0 in case for long options.

Sun Apr 19 10:17:52 1992  Richard Stallman  ([e-mail])

	* reader.c (packsymbols): Handle -p when declaring yylval.

Sat Apr 18 18:18:48 1992  Richard Stallman  ([e-mail])

	* output.c (output_gram): Output #endif properly at end of decl.

Mon Mar 30 01:13:41 1992  Richard Stallman  ([e-mail])

	* Version 1.17.

	* Makefile.in (clean): Don't delete configuration files or TAGS.
	(distclean): New target; do delete those.

Sat Mar 28 17:18:50 1992  Richard Stallman  ([e-mail])

	* output.c (output_gram): Conditionalize yyprhs on YYDEBUG.

	* LR0.c (augment_automaton): If copying sp->shifts to insert new
	shift, handle case of inserting at end.

Sat Mar 21 23:25:47 1992  Richard Stallman  ([e-mail])

	* lex.c (skip_white_space): Handle C++ comments.
	* reader.c (copy_definition, parse_union_decl, copy_guard):
	(copy_action): Likewise.

Sun Mar  8 01:22:21 1992  Richard Stallman  ([e-mail])

	* bison.simple (YYPOPSTACK): Fix typo.

Sat Feb 29 03:53:06 1992  Richard Stallman  ([e-mail])

	* Makefile.in (install): Install bison.info* files one by one.

Fri Feb 28 19:55:30 1992  David J. MacKenzie  ([e-mail])

	* bison.1: Document long options as starting with `--', not `+'.

Sat Feb  1 00:08:09 1992  Richard Stallman  ([e-mail])

	* getargs.c (getargs): Accept value 0 from getopt_long.

Thu Jan 30 23:39:15 1992  Richard Stallman  ([e-mail])

	* Makefile.in (mostlyclean): Renamed from `clean'.
	(clean): Renamed from 'distclean'.  Dep on mostlyclean, not realclean.
	(realclean): Dep on clean.

Mon Jan 27 21:59:19 1992  Richard Stallman  ([e-mail])

	* bison.simple: Use malloc, not xmalloc, and handle failure explicitly.

Sun Jan 26 22:40:04 1992  Richard Stallman  ([e-mail])

	* conflicts.c (total_conflicts): Delete unused arg to fprintf.

Tue Jan 21 23:17:44 1992  Richard Stallman  ([e-mail])

	* Version 1.16.

Mon Jan  6 16:50:11 1992  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* Makefile (distclean): Depend on clean, not realclean.  Don't rm TAGS.
	(realclean): rm TAGS here.

	* symtab.c (free_symtab): Don't free the type names.

Sun Dec 29 22:25:40 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* machine.h: MSDOS has 32-bit ints if __GO32__.

Wed Dec 25 22:09:07 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* bison.simple [_AIX]: Indent `#pragma alloca', so old C compilers
	don't choke on it.

Mon Dec 23 02:10:16 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* getopt.c, getopt1.c, getopt.h: Link them to standard source location.
	* alloca.c: Likewise.
	* Makefile.in (dist): Copy those files from current dir.

	* getargs.c: Update usage message.

	* LR0.c (augment_automaton): Put new shift in proper order.

Fri Dec 20 18:39:20 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* conflicts.c: Use memcpy if ANSI C library.

	* closure.c (set_fderives): Delete redundant assignment to vrow.

	* closure.c (print_firsts): Fix bounds and offset checking tags.

	* closure.c (tags): Declare just once at start of file.

	* LR0.c (allocate_itemsets): Eliminate unused var max.
	(augment_automaton): Test sp is non-null.

	* lalr.c (initialize_LA): Make the vectors at least 1 element long.

	* reader.c (readgram): Remove separate YYSTYPE default for MSDOS.

Wed Dec 18 02:40:32 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* print.c (print_grammar): Don't print disabled rules.

Tue Dec 17 03:48:07 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* lex.c (lex): Parse hex escapes properly.
	Handle \v when filling token_buffer.

	* lex.c: Include new.h.
	(token_buffer): Change to a pointer.
	(init_lex): Allocate initial buffer.
	(grow_token_buffer): New function.
	(lex, parse_percent_token): Use that.

	* reader.c (read_declarations): Call open_extra_files just once.
	(parse_token_decl): Don't free previous typename value.
	Don't increment nvars if symbol is already a nonterminal.
	(parse_union_decl): Catch unmatched close-brace.
	(parse_expect_decl): Null-terminate buffer.
	(copy_guard): Set brace_flag for {, not for }.

	* reader.c: Fix %% in calls to fatal.

	* reader.c (token_buffer): Just one extern decl, at top level.
	Declare as pointer.

	* symtab.c (free_symtab): Free type_name fields.  Free symtab itself.

Mon Nov 25 23:04:31 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* bison.simple: Handle alloca for AIX.

	* Makefile.in (mandir): Compute default using manext.

Sat Nov  2 21:39:32 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Update all files to GPL version 2.

Fri Sep  6 01:51:36 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* bison.simple (__yy_bcopy): Use builtin if GCC version 2.

Mon Aug 26 22:09:12 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* reader.c (parse_assoc_decl): Error if same symbol gets two precs.

Mon Aug 26 16:42:09 1991  David J. MacKenzie  (djm at pogo.gnu.ai.mit.edu)

	* Makefile.in, configure: Only put $< in Makefile if using VPATH,
	because older makes don't understand it.

Fri Aug 23 00:05:54 1991  David J. MacKenzie  (djm at apple-gunkies)

	* conflicts.c [_AIX]: #pragma alloca.
	* reduce.c: Don't define TRUE and FALSE if already defined.

Mon Aug 12 22:49:58 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* Makefile.in: Add deps on system.h.
	(install): Add some deps.

Fri Aug  2 12:19:20 1991  David J. MacKenzie  (djm at apple-gunkies)

	* Makefile.in (dist): Include texinfo.tex.

	* configure: Create config.status.  Remove it and Makefile if
	interrupted while creating them.

Thu Aug  1 23:14:01 1991  David J. MacKenzie  (djm at apple-gunkies)

	* configure: Check for +srcdir etc. arg and look for
	Makefile.in in that directory.  Set VPATH if srcdir is not `.'.
	* Makefile.in (prefix): Renamed from DESTDIR. 

Wed Jul 31 21:29:47 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* print.c (print_grammar): Make output prettier.  Break lines.

Tue Jul 30 22:38:01 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* print.c (print_grammar): New function.
	(verbose): Call it instead of printing token names here.

Mon Jul 22 16:39:54 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* vmsgetargs.c (spec_name_prefix, spec_file_prefix): Define variables.

Wed Jul 10 01:38:25 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* configure, Makefile.in: $(INSTALLPROG) -> $(INSTALL),
	$(INSTALLTEXT) -> $(INSTALLDATA).

Tue Jul  9 00:53:58 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* bison.simple: Don't include malloc.h if __TURBOC__.

Sat Jul  6 15:18:12 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

	* Replace Makefile with configure and Makefile.in.
	Update README with current compilation instructions.

Mon Jul  1 23:12:20 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* reader.c (reader): Make the output define YYBISON.

Thu Jun 20 16:52:51 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

	* Makefile (MANDIR, MANEXT): Install man page in
	/usr/local/man/man1/bison.1 by default, instead of
	/usr/man/manl/bison.l, for consistency with other GNU programs.
	* Makefile: Rename BINDIR et al. to lowercase to conform to
	GNU coding standards.
	(install): Make man page non-executable.

Fri May 31 23:22:13 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* Makefile (bison.info): New target.
	(realclean): New target.

Thu May  2 16:36:19 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* bison.simple: Use YYPRINT to print a token, if it's defined.

Mon Apr 29 12:22:55 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* lalr.c (transpose): Rename R to R_arg.
	(initialize_LA): Avoid shadowing variable j.

	* reader.c (packsymbols): Avoid shadowing variable i.

	* files.c: Declare exit and perror.

	* machine.h: Define MAXSHORT and MINSHORT for the eta-10.

Tue Apr  2 20:49:12 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* allocate.c (mallocate): Always allocate at least one byte.

Tue Mar 19 22:17:19 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)

	* Makefile (dist): Put alloca.c into distribution.

Wed Mar  6 17:45:42 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* print.c (print_actions): Nicer output for final states.

Thu Feb 21 20:39:53 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* output.c (output_rule_data): Break lines in yytline based on hpos.

Thu Feb  7 12:54:36 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* bison.simple (yyparse): Move decl of yylsa before use.

Tue Jan 15 23:41:33 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* Version 1.14.

	* output.c (output_rule_data): Handle NULL in tags[i].

Fri Jan 11 17:27:24 1991  Richard Stallman  (rms at mole.ai.mit.edu)

	* bison.simple: On MSDOS, include malloc.h.

Sat Dec 29 19:59:55 1990  David J. MacKenzie  (djm at wookumz.ai.mit.edu)

	* files.c: Use `mallocate' instead of `xmalloc' so no extra decl is
	needed. 

Wed Dec 19 18:31:21 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* reader.c (readgram): Alternate YYSTYPE defn for MSDOS.
	* files.c [MSDOS]: Declare xmalloc.

Thu Dec 13 12:45:54 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* output.c (output_rule_data): Put all symbols in yytname.

	* bison.simple (yyparse): Delete extra fprintf arg
	when printing a result of reduction.

Mon Dec 10 13:55:15 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* reader.c (packsymbols): Don't declare yylval if pure_parser.

Tue Oct 30 23:38:09 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* Version 1.12.

	* LR0.c (augment_automaton): Fix bugs adding sp2 to chain of shifts.

Tue Oct 23 17:41:49 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* bison.simple: Don't define alloca if already defined.

Sun Oct 21 22:10:53 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* getopt.c: On VMS, use string.h.

	* main.c (main): Return type int.

Mon Sep 10 16:59:01 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* output.c (output_headers): Output macro defs for -p.

	* reader.c (readgram): Handle consecutive actions.

	* getargs.c (getargs): Rename -a to -p.
	* files.c (openfiles): Change names used for -b.

Mon Aug 27 00:30:15 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* reduce.c (reduce_grammar_tables): Don't map rlhs of disabled rule.

Sun Aug 26 13:43:32 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* closure.c (print_firsts, print_fderives): Use BITISSET to test bits.

Thu Aug 23 22:13:40 1990  Richard Stallman  (rms at mole.ai.mit.edu)

	* closure.c (print_firsts): vrowsize => varsetsize.
	(print_fderives): rrowsize => rulesetsize.

Fri Aug 10 15:32:11 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* bison.simple (alloca): Don't define if already defined.
	(__yy_bcopy): Alternate definition for C++.

Wed Jul 11 00:46:03 1990  David J. MacKenzie  (djm at albert.ai.mit.edu)

	* getargs.c (getargs): Mention +yacc in usage message.

Tue Jul 10 17:29:08 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* reader.c (parse_token_decl, copy_action):
	Set value_components_used if appropriate.
	(readgram): Inhibit output of YYSTYPE definition in that case.

Sat Jun 30 13:47:57 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* output.c (output_parser): Define YYPURE if pure, and not otherwise.
	Don't define YYIMPURE.
	* bison.simple: Adjust conditionals accordingly.
	* bison.simple (YYLEX): If locations not in use, don't pass &yylloc.

Thu Jun 28 12:32:21 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* getargs.c (longopts): Add `yacc'.

Thu Jun 28 00:40:21 1990  David J. MacKenzie  (djm at apple-gunkies)

	* getargs.c (getargs): Add long options.
	* Makefile: Link with getopt1.o and add getopt1.c and getopt.h to
	dist. 

	* Move version number and description back into version.c from
	Makefile and getargs.c.
	* Makefile (dist): Extract version number from version.c.

Tue Jun 26 13:16:35 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* output.c (output): Always call output_gram.
	* bison.simple (yyparse): Print rhs and lhs symbols of reduction rule.

Thu Jun 21 00:15:40 1990  David J. MacKenzie  (djm at albert.ai.mit.edu)

	* main.c: New global var `program_name' to hold argv[0] for error
	messages.
	* allocate.c, files.c, getargs.c, reader.c: Use `program_name'
	in messages instead of hardcoded "bison".

Wed Jun 20 23:38:34 1990  David J. MacKenzie  (djm at albert.ai.mit.edu)

	* Makefile: Specify Bison version here.  Add rule to pass it to
	version.c.  Encode it in distribution directory and tar file names.
	* version.c: Use version number from Makefile.
	* getargs.c (getargs): Print additional text that used to be part of
	version_string in version.c.  Use -V instead of -version to print
	Bison version info.  Print a usage message and exit if given an
	invalid option.

Tue Jun 19 01:15:18 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)

	* bison.simple: Fix a #line.

	* Makefile (INSTALL): New parameter.
	(install): Use that.
	(CFLAGS): Move definition to top.

Sun Jun 17 17:10:21 1990  Richard Stallman  (rms at sugar-bombs.ai.mit.edu)