-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
# it under the terms of the GNU General Public License as published by
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
+# 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_use_push_for_pull_if([
+ b4_push_if([
+ m4_define([b4_use_push_for_pull_flag], [[0]])
+ b4_define_flag_if([use_push_for_pull])
+ ], [
+ m4_define([b4_push_flag], [[1]])
+ b4_define_flag_if([push])
+ ])])
+
m4_include(b4_pkgdatadir/[c.m4])
## ---------------- ##
m4_ifdef([b4_lex_param], b4_lex_param)))
-
## ------------ ##
## Data Types. ##
## ------------ ##
# 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_get_percent_code([[top]])[]dnl
m4_if(b4_prefix, [yy], [],
-[/* Substitute the variable and function names. */
-]b4_push_if([#define yypush_parse b4_prefix[]push_parse
-#define yypstate_new b4_prefix[]pstate_new
-#define yypstate_delete b4_prefix[]pstate_delete
-#define yypstate b4_prefix[]pstate],
-[#define yyparse b4_prefix[]parse])[
-#define yylex b4_prefix[]lex
-#define yyerror b4_prefix[]error
-#define yylval b4_prefix[]lval
-#define yychar b4_prefix[]char
-#define yydebug b4_prefix[]debug
-#define yynerrs b4_prefix[]nerrs
-b4_locations_if([#define yylloc b4_prefix[]lloc])])[
+[[/* Substitute the variable and function names. */
+]b4_pull_if([[#define yyparse ]b4_prefix[parse
+]])b4_push_if([[#define yypush_parse ]b4_prefix[push_parse
+]b4_pull_if([[#define yypull_parse ]b4_prefix[pull_parse
+]])[#define yypstate_new ]b4_prefix[pstate_new
+#define yypstate_delete ]b4_prefix[pstate_delete
+#define yypstate ]b4_prefix[pstate
+]])[#define yylex ]b4_prefix[lex
+#define yyerror ]b4_prefix[error
+#define yylval ]b4_prefix[lval
+#define yychar ]b4_prefix[char
+#define yydebug ]b4_prefix[debug
+#define yynerrs ]b4_prefix[nerrs
+]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
/* Copy the first part of user declarations. */
]b4_user_pre_prologue[
# define YYTOKEN_TABLE ]b4_token_table[
#endif
-]m4_ifdef([b4_requires],
-[[/* Copy the %requires blocks. */
-]b4_user_requires])[]dnl
+]b4_get_percent_code([[requires]])[]dnl
b4_token_enums_defines(b4_tokens)[
struct yypstate;
typedef struct yypstate yypstate;
enum { YYPUSH_MORE = 4 };
-]b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
-b4_c_function_decl([[yypstate_delete]], [[void]],
- [[[yypstate *yyps]], [[yyps]]])
-b4_c_function_decl([[yypush_parse]], [[int]],
- [[[yypstate *yyps]], [[yyps]]],
+
+]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
+])b4_c_function_decl([[yypush_parse]], [[int]],
+ [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
[[[int yypushed_char]], [[yypushed_char]]],
[[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
- [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
- b4_parse_param]))[
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
+ b4_parse_param]))
+b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
+ [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
+ b4_parse_param]))])
+b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
+b4_c_function_decl([[yypstate_delete]], [[void]],
+ [[[yypstate *yyps]], [[yyps]]])[
#endif
]])
-m4_ifdef([b4_provides],
-[[/* Copy the %provides blocks. */
-]b4_user_provides])[]dnl
+b4_get_percent_code([[provides]])[]dnl
[/* Copy the second part of user declarations. */
-]b4_user_post_prologue[
+]b4_user_post_prologue
+b4_get_percent_code[]dnl
-#ifdef short
+[#ifdef short
# undef short
#endif
/* The semantic value of the lookahead symbol. */
YYSTYPE yylval;
-
-/* Number of syntax errors so far. */
-]b4_push_if([],[
-int yynerrs;])b4_locations_if([[
+]b4_locations_if([[
/* Location data for the lookahead symbol. */
-YYLTYPE yylloc;]])
-])
-
-m4_define([b4_yyerror_range],b4_push_if([yyps->yyerror_range],[yyerror_range]))
+YYLTYPE yylloc;
+]])b4_pure_if([], [[
+/* Number of syntax errors so far. */
+int yynerrs;
+]])])
# b4_declare_parser_state_variables
# ---------------------------------
# Declare all the variables that are needed to maintain the parser state
# between calls to yypush_parse.
m4_define([b4_declare_parser_state_variables],
-[[
+[b4_pure_if([[ /* Number of syntax errors so far. */
+ int yynerrs;
+]])[
int yystate;
- int yyn;
- int yyresult;
/* Number of tokens to shift before error messages enabled. */
int yyerrstatus;
- /* Look-ahead token as an internal (translated) token number. */
- int yytoken;
/* Three stacks and their tools:
`yyss': related to states,
YYLTYPE yylsa[YYINITDEPTH];
YYLTYPE *yyls;
YYLTYPE *yylsp;
+
/* The locations where the error started and ended. */
- YYLTYPE yyerror_range[2];]])[
+ YYLTYPE yyerror_range[2];
+]])[
YYSIZE_T yystacksize;
- /* The variables used to return semantic value and location from the
- action routines. */
- YYSTYPE yyval;
-]b4_locations_if([[ YYLTYPE yyloc;
-]])])
+]])
m4_divert_pop([KILL])dnl# ====================== End of M4 code.
int yynew;
};
+]b4_pull_if([b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
+{
+ return yypull_parse (0]m4_ifset([b4_parse_param],
+ [[, ]b4_c_args(b4_parse_param)])[);
+}
+
+]b4_c_function_def([[yypull_parse]], [[int]],
+ [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
+ b4_parse_param]))[
+{
+ int yystatus;
+ yypstate *yyps_local;
+]b4_pure_if([[ int yychar;
+ YYSTYPE yylval;
+]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)])[);
+ } while (yystatus == YYPUSH_MORE);
+ if (yyps == 0)
+ yypstate_delete (yyps_local);
+ return yystatus;
+}
+]])[
/* Initialize the parser data structure. */
]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
{
yypstate *yyps = (yypstate *) malloc (sizeof *yyps);
- yyps->yyresult = -1;
yyps->yynew = 1;
return yyps;
}
free (yyps);
}
-#define yystate yyps->yystate
-#define yyn yyps->yyn
-#define yyresult yyps->yyresult
+]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
+]])[#define yystate yyps->yystate
#define yyerrstatus yyps->yyerrstatus
-#define yytoken yyps->yytoken
#define yyssa yyps->yyssa
#define yyss yyps->yyss
#define yyssp yyps->yyssp
]b4_locations_if([[#define yylsa yyps->yylsa
#define yyls yyps->yyls
#define yylsp yyps->yylsp
+#define yyerror_range yyps->yyerror_range
]])[#define yystacksize yyps->yystacksize
-#define yyval yyps->yyval
-]b4_locations_if([[#define yyloc yyps->yyloc
-]])])[
+]])[
/*-------------------------.
| yyparse or yypush_parse. |
`-------------------------*/
]b4_push_if([
-b4_c_function_def([[yypush_parse]], [[int]], [[[yypstate *yyps]], [[yyps]]],
+b4_c_function_def([[yypush_parse]], [[int]],
+ [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
[[[int yypushed_char]], [[yypushed_char]]],
[[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
- [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
b4_parse_param]))], [
#ifdef YYPARSE_PARAM
b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
#endif])[
{
]b4_pure_if([b4_declare_scanner_communication_variables])
- b4_push_if([], [b4_declare_parser_state_variables])[
-
+ b4_push_if([b4_pure_if([], [[ int yypushed_char = yychar;
+ YYSTYPE yypushed_val = yylval;
+ ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
+]])])],
+ [b4_declare_parser_state_variables])[
+ int yyn;
+ int yyresult;
+ /* Look-ahead token as an internal (translated) token number. */
+ int yytoken;
+ /* The variables used to return semantic value and location from the
+ action routines. */
+ YYSTYPE yyval;
+]b4_locations_if([[ YYLTYPE yyloc;
+]])[
#if YYERROR_VERBOSE
/* Buffer for error messages, and its allocated size. */
char yymsgbuf[128];
int yylen = 0;
]b4_push_if([[
if (!yyps->yynew)
- goto yyread_pushed_token;
+ {
+ yyn = yypact[yystate];
+ goto yyread_pushed_token;
+ }
]])[
yytoken = 0;
yyss = yyssa;
yystate = 0;
yyerrstatus = 0;
-]b4_push_if([], [[ yynerrs = 0;]])[
+ yynerrs = 0;
yychar = YYEMPTY; /* Cause a token to be read. */
/* Initialize stack pointers.
{
]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;
-
+]b4_pure_if([], [[
+ /* Restoring the pushed token is only necessary for the first
+ yypush_parse invocation since subsequent invocations don't overwrite
+ it before jumping to yyread_pushed_token. */
+ yychar = yypushed_char;
+ yylval = yypushed_val;
+ ]b4_locations_if([[yylloc = yypushed_loc;
+]])])[
yyread_pushed_token:
]])[ YYDPRINTF ((stderr, "Reading a token: "));
-]b4_push_if([[ yychar = yypushed_char;
+]b4_push_if([b4_pure_if([[ yychar = yypushed_char;
if (yypushed_val)
yylval = *yypushed_val;
]b4_locations_if([[ if (yypushed_loc)
- yylloc = *yypushed_loc;]])],
+ yylloc = *yypushed_loc;
+]])])],
[[ yychar = YYLEX;
]])[ }
/* If not already recovering from an error, report this error. */
if (!yyerrstatus)
{
-]b4_push_if([],[ ++yynerrs;])[
+ ++yynerrs;
#if ! YYERROR_VERBOSE
yyerror (]b4_yyerror_args[YY_("syntax error"));
#else
#endif
}
-]b4_locations_if([[ ]b4_yyerror_range[[0] = yylloc;]])[
+]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
if (yyerrstatus == 3)
{
if (/*CONSTCOND*/ 0)
goto yyerrorlab;
-]b4_locations_if([[ ]b4_yyerror_range[[0] = yylsp[1-yylen];
+]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
]])[ /* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
YYPOPSTACK (yylen);
if (yyssp == yyss)
YYABORT;
-]b4_locations_if([[ ]b4_yyerror_range[[0] = *yylsp;]])[
+]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
yydestruct ("Error: popping",
yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
YYPOPSTACK (1);
*++yyvsp = yylval;
]b4_locations_if([[
- ]b4_yyerror_range[[1] = yylloc;
+ yyerror_range[1] = yylloc;
/* Using YYLLOC is tempting, but would change the location of
the lookahead. YYLOC is available though. */
- YYLLOC_DEFAULT (yyloc, (]b4_yyerror_range[- 1), 2);
+ YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
*++yylsp = yyloc;]])[
/* Shift the error token. */
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_get_percent_code([[requires]])[]dnl
b4_token_enums_defines(b4_tokens)
# define YYSTYPE_IS_DECLARED 1
#endif
-]b4_pure_if([],
-[extern YYSTYPE b4_prefix[]lval;])
+]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
b4_locations_if(
[#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
# define YYLTYPE_IS_TRIVIAL 1
#endif
-]b4_pure_if([],
- [extern YYLTYPE b4_prefix[]lloc;])
+]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
)dnl b4_locations_if
b4_push_if([[#ifndef YYPUSH_DECLS
struct ]b4_prefix[pstate;
typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
enum { YYPUSH_MORE = 4 };
-]b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
- [[[void]], []])
-b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
- [[b4_prefix[pstate *yyps]], [[yyps]]])
-b4_c_function_decl([b4_prefix[push_parse]], [[int]],
- [[b4_prefix[pstate *yyps]], [[yyps]]],
+]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
+])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
+ [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
[[[int yypushed_char]], [[yypushed_char]]],
[[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
- [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])m4_ifset([b4_parse_param], [,
- b4_parse_param]))[
+ [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
+ b4_parse_param]))
+b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
+ [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
+ b4_parse_param]))])
+b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
+ [[[void]], []])
+b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
+ [[b4_prefix[pstate *yyps]], [[yyps]]])[
#endif
]])
-m4_ifdef([b4_provides],
-[[/* Copy the %provides blocks. */
-]b4_user_provides])[]
+b4_get_percent_code([[provides]])[]dnl
])dnl b4_defines_if
+m4_divert_pop(0)
projects / bison.git / blobdiff