-m4_divert(-1) -*- C -*-
+ -*- C -*-
# Yacc compatible skeleton for Bison
-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-# Free Software Foundation, Inc.
+# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+# 2007 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (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, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301 USA
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Check the value of %define api.push_pull.
+b4_percent_define_default([[api.push_pull]], [[pull]])
+b4_percent_define_check_values([[[[api.push_pull]],
+ [[pull]], [[push]], [[both]]]])
+b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
+b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
+m4_case(b4_percent_define_get([[api.push_pull]]),
+ [pull], [m4_define([b4_push_flag], [[0]])],
+ [push], [m4_define([b4_pull_flag], [[0]])])
+
+# Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
+# tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
+# behavior at all when push parsing is already requested.
+b4_define_flag_if([use_push_for_pull])
+b4_use_push_for_pull_if([
+ b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
+ [m4_define([b4_push_flag], [[1]])])])
m4_include(b4_pkgdatadir/[c.m4])
## Pure/impure interfaces. ##
## ------------------------ ##
+b4_percent_define_default([[api.pure]], [[false]])
+b4_define_flag_if([pure])
+m4_define([b4_pure_flag],
+ [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
# b4_yacc_pure_if(IF-TRUE, IF-FALSE)
# ----------------------------------
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
-@output b4_parser_file_name
+m4_divert_push(0)dnl
+@output(b4_parser_file_name@)
b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
[1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
USER NAME SPACE" below. */
]b4_identification
+
+b4_percent_code_get([[top]])[]dnl
m4_if(b4_prefix, [yy], [],
[[/* Substitute the variable and function names. */
]b4_pull_if([[#define yyparse ]b4_prefix[parse
# define YYTOKEN_TABLE ]b4_token_table[
#endif
-]m4_ifdef([b4_requires],
-[[/* Copy the %requires blocks. */
-]b4_user_requires])[]dnl
+]b4_percent_code_get([[requires]])[]dnl
b4_token_enums_defines(b4_tokens)[
#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
]m4_ifdef([b4_stype],
[[typedef union ]b4_union_name[
+{
]b4_user_stype[
- YYSTYPE;
+} YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1]],
[m4_if(b4_tag_seen_flag, 0,
[[typedef int YYSTYPE;
[[[yypstate *yyps]], [[yyps]]])[
#endif
]])
-m4_ifdef([b4_provides],
-[[/* Copy the %provides blocks. */
-]b4_user_provides])[]dnl
+b4_percent_code_get([[provides]])[]dnl
[/* Copy the second part of user declarations. */
-]b4_user_post_prologue[
+]b4_user_post_prologue
+b4_percent_code_get[]dnl
-#ifdef short
+[#ifdef short
# undef short
#endif
#if ! defined yyoverflow || YYERROR_VERBOSE
-/* The parser invokes alloca or malloc; define the necessary symbols. */
+]b4_push_if([],
+[[/* The parser invokes alloca or malloc; define the necessary symbols. */
# ifdef YYSTACK_USE_ALLOCA
# if YYSTACK_USE_ALLOCA
# endif
# endif
-# ifdef YYSTACK_ALLOC
+]])dnl
+[# ifdef YYSTACK_ALLOC
/* Pacify GCC's `empty if-body' warning. */
# define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
# ifndef YYSTACK_ALLOC_MAXIMUM
/* The symbols being reduced. */
for (yyi = 0; yyi < yynrhs; yyi++)
{
- fprintf (stderr, " $%d = ", yyi + 1);
+ YYFPRINTF (stderr, " $%d = ", yyi + 1);
yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
&]b4_rhs_value(yynrhs, yyi + 1)[
]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
b4_user_args[);
- fprintf (stderr, "\n");
+ YYFPRINTF (stderr, "\n");
}
}
{
return yypull_parse (0]m4_ifset([b4_parse_param],
[[, ]b4_c_args(b4_parse_param)])[);
-}
+}]b4_pure_if([], [[
+
+static char yypstate_allocated = 0;]])[
]b4_c_function_def([[yypull_parse]], [[int]],
[[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
]b4_locations_if([[ YYLTYPE yylloc;
]])])[
if (yyps == 0)
- yyps_local = yypstate_new ();
- else
- yyps_local = yyps;
- do {
- yychar = YYLEX;
- yystatus =
- yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
+ {
+ yyps_local = yypstate_new ();
+ if (!yyps_local)
+ {]b4_pure_if([[
+ yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
+ if (!yypstate_allocated)
+ yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
+ return 2;
+ }
+ }
+ else
+ yyps_local = yyps;
+ do {
+ yychar = YYLEX;
+ yystatus =
+ yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
} while (yystatus == YYPUSH_MORE);
if (yyps == 0)
yypstate_delete (yyps_local);
/* Initialize the parser data structure. */
]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
{
- yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
- yyps->yynew = 1;
+ yypstate *yyps;]b4_pure_if([], [[
+ if (yypstate_allocated)
+ {
+ yyerror (]b4_yyerror_args[YY_("cannot allocate multiple impure push-parser instances"));
+ return 0;
+ }]])[
+ yyps = (yypstate *) malloc (sizeof *yyps);
+ if (!yyps)
+ return 0;
+ yyps->yynew = 1;]b4_pure_if([], [[
+ yypstate_allocated = 1;]])[
return yyps;
}
]b4_c_function_def([[yypstate_delete]], [[void]],
[[[yypstate *yyps]], [[yyps]]])[
{
- free (yyps);
+#ifndef yyoverflow
+ /* If the stack was reallocated but the parse did not complete, then the
+ stack still needs to be freed. */
+ if (!yyps->yynew && yyps->yyss != yyps->yyssa)
+ YYSTACK_FREE (yyps->yyss);
+#endif
+ free (yyps);]b4_pure_if([], [[
+ yypstate_allocated = 0;]])[
}
]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
b4_c_function_def([yyparse], [int], b4_parse_param)
#endif])[
{
- ]b4_pure_if([b4_declare_scanner_communication_variables])
- b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
+]b4_pure_if([b4_declare_scanner_communication_variables])
+b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
YYSTYPE yypushed_val = yylval;
]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
]])])],
{
]b4_push_if([[ if (!yyps->yynew)
{
- YYDPRINTF ((stderr, "Return for a new token:\n"));
- yyresult = YYPUSH_MORE;
+]b4_use_push_for_pull_if([],
+[[ YYDPRINTF ((stderr, "Return for a new token:\n"));
+]])[ yyresult = YYPUSH_MORE;
goto yypushreturn;
}
yyps->yynew = 0;
if (yyss != yyssa)
YYSTACK_FREE (yyss);
#endif
-]b4_push_if([yypushreturn:])[
-#if YYERROR_VERBOSE
+]b4_push_if([[ yyps->yynew = 1;
+
+yypushreturn:
+]])[#if YYERROR_VERBOSE
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
#endif
/* Make sure YYID is used. */
return YYID (yyresult);
-]}
+}
-b4_epilogue
+
+]b4_epilogue
b4_defines_if(
-[@output b4_spec_defines_file
+[@output(b4_spec_defines_file@)
b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
[1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
-m4_ifdef([b4_requires],
-[[/* Copy the %requires blocks. */
-]b4_user_requires])[]dnl
+b4_percent_code_get([[requires]])[]dnl
b4_token_enums_defines(b4_tokens)
[#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
]m4_ifdef([b4_stype],
[[typedef union ]b4_union_name[
+{
]b4_user_stype[
- YYSTYPE;
+} YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1]],
[m4_if(b4_tag_seen_flag, 0,
[[typedef int YYSTYPE;
[[b4_prefix[pstate *yyps]], [[yyps]]])[
#endif
]])
-m4_ifdef([b4_provides],
-[[/* Copy the %provides blocks. */
-]b4_user_provides])[]
+b4_percent_code_get([[provides]])[]dnl
])dnl b4_defines_if
+m4_divert_pop(0)
projects / bison.git / blobdiff