mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-08-19 07:34:25 +00:00
Akim Demaille
c547693afd
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 Conflicts: Makefile.am NEWS data/glr.c data/lalr1.cc data/stack.hh examples/rpcalc/local.mk src/flex-scanner.h src/getargs.c src/output.c src/parse-gram.c src/parse-gram.h src/parse-gram.y tests/Makefile.am tests/bison.in
98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
/* Common parts between scan-code.l, scan-gram.l, and scan-skel.l.
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Copyright (C) 2006, 2009-2012 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef FLEX_PREFIX
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# error "FLEX_PREFIX not defined"
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#endif
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/* Whether this version of Flex is (strictly) greater than
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Major.Minor.Subminor. */
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#define FLEX_VERSION_GT(Major, Minor, Subminor) \
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(defined YY_FLEX_MAJOR_VERSION \
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&& (Major < YY_FLEX_MAJOR_VERSION \
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|| (Major == YY_FLEX_MAJOR_VERSION \
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&& (defined YY_FLEX_MINOR_VERSION \
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&& (Minor < YY_FLEX_MINOR_VERSION \
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|| (Minor == YY_FLEX_MINOR_VERSION \
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&& defined YY_FLEX_SUBMINOR_VERSION \
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&& Subminor < YY_FLEX_SUBMINOR_VERSION))))))
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/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
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#if ! FLEX_VERSION_GT (2, 5, 31)
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int FLEX_PREFIX (get_lineno) (void);
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FILE *FLEX_PREFIX (get_in) (void);
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FILE *FLEX_PREFIX (get_out) (void);
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int FLEX_PREFIX (get_leng) (void);
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char *FLEX_PREFIX (get_text) (void);
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void FLEX_PREFIX (set_lineno) (int);
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void FLEX_PREFIX (set_in) (FILE *);
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void FLEX_PREFIX (set_out) (FILE *);
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int FLEX_PREFIX (get_debug) (void);
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void FLEX_PREFIX (set_debug) (int);
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int FLEX_PREFIX (lex_destroy) (void);
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#endif
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#define last_string FLEX_PREFIX (last_string)
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/* It seems to be a nice "feature" of Flex that one cannot use yytext,
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yyleng etc. when a prefix is given, since there is no longer a
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#define, but rather the token is actually changed in the output.
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However, this is not true for Flex 2.5.4. */
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#ifndef yyleng
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# define yyleng FLEX_PREFIX (leng)
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#endif
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#ifndef yytext
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# define yytext FLEX_PREFIX (text)
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#endif
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/* Non-reentrant scanners generated by Flex 2.5.9 and later (and some earlier
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versions according to the Flex manual) leak memory if yylex_destroy is not
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invoked. However, yylex_destroy is not defined before Flex 2.5.9, so give
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an implementation here that at least appears to work with Flex 2.5.4. */
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#if ! FLEX_VERSION_GT (2, 5, 9)
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# define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER)
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#endif
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/* OBSTACK_FOR_STRING -- Used to store all the characters that we need to
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keep (to construct ID, STRINGS etc.). Use the following macros to
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use it.
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Use STRING_GROW to append what has just been matched, and
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STRING_FINISH to end the string (it puts the ending 0).
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STRING_FINISH also stores this string in LAST_STRING, which can be
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used, and which is used by STRING_FREE to free the last string. */
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#ifndef FLEX_NO_OBSTACK
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static struct obstack obstack_for_string;
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# define STRING_GROW \
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obstack_grow (&obstack_for_string, yytext, yyleng)
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# define STRING_FINISH \
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do { \
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obstack_1grow (&obstack_for_string, '\0'); \
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last_string = obstack_finish (&obstack_for_string); \
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} while (0)
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# define STRING_FREE \
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obstack_free (&obstack_for_string, last_string)
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#endif
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