-*- C -*-
# Yacc compatible skeleton for Bison
-# Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation,
+# Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation,
# Inc.
m4_pushdef([b4_copyright_years],
- [1984, 1989-1990, 2000-2012])
+ [1984, 1989-1990, 2000-2013])
# 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
## ------------------------ ##
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)
-# ----------------------------------
-# Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
-m4_define([b4_yacc_pure_if],
-[b4_pure_if([m4_ifset([b4_parse_param],
- [$1], [$2])],
- [$2])])
-
+b4_percent_define_check_values([[[[api.pure]],
+ [[false]], [[true]], [[]], [[full]]]])
+
+m4_define([b4_pure_flag], [[0]])
+m4_case(b4_percent_define_get([[api.pure]]),
+ [false], [m4_define([b4_pure_flag], [[0]])],
+ [true], [m4_define([b4_pure_flag], [[1]])],
+ [], [m4_define([b4_pure_flag], [[1]])],
+ [full], [m4_define([b4_pure_flag], [[2]])])
+
+m4_define([b4_pure_if],
+[m4_case(b4_pure_flag,
+ [0], [$2],
+ [1], [$1],
+ [2], [$1])])
+ [m4_fatal([invalid api.pure value: ]$1)])])
+
+# b4_yyerror_arg_loc_if(ARG)
+# --------------------------
+# Expand ARG iff yyerror is to be given a location as argument.
+m4_define([b4_yyerror_arg_loc_if],
+[b4_locations_if([m4_case(b4_pure_flag,
+ [1], [m4_ifset([b4_parse_param], [$1])],
+ [2], [$1])])])
# b4_yyerror_args
# ---------------
# Arguments passed to yyerror: user args plus yylloc.
m4_define([b4_yyerror_args],
-[b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
+[b4_yyerror_arg_loc_if([&yylloc, ])dnl
m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
-# b4_lex_param
-# ------------
-# Accumulate in b4_lex_param all the yylex arguments.
-# b4_lex_param arrives quoted twice, but we want to keep only one level.
-m4_define([b4_lex_param],
-m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
-b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
-m4_ifdef([b4_lex_param], b4_lex_param)))
-
## ------------ ##
## Data Types. ##
[b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
-
## ----------- ##
## Locations. ##
## ----------- ##
/* The lookahead symbol. */
int yychar;
+]b4_pure_if([[
/* The semantic value of the lookahead symbol. */
-YYSTYPE yylval;]b4_locations_if([[
+/* Default value used for initialization, for pacifying older GCCs
+ or non-GCC compilers. */
+YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
+YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);]b4_locations_if([[
/* Location data for the lookahead symbol. */
-YYLTYPE yylloc;]])b4_pure_if([], [[
-
+static YYLTYPE yyloc_default]b4_yyloc_default[;
+YYLTYPE yylloc = yyloc_default;]])],
+[[/* The semantic value of the lookahead symbol. */
+YYSTYPE yylval;]b4_locations_if([[
+/* Location data for the lookahead symbol. */
+YYLTYPE yylloc]b4_yyloc_default[;]])[
/* Number of syntax errors so far. */
int yynerrs;]])])
int yyerrstatus;
/* The stacks and their tools:
- `yyss': related to states.
- `yyvs': related to semantic values.]b4_locations_if([[
- `yyls': related to locations.]])[
+ 'yyss': related to states.
+ 'yyvs': related to semantic values.]b4_locations_if([[
+ 'yyls': related to locations.]])[
Refer to the stacks through separate pointers, to allow yyoverflow
to reallocate them elsewhere. */
[[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
[[[int pushed_char]], [[pushed_char]]],
[[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
- [[b4_api_PREFIX[LTYPE const *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
+ [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
b4_parse_param]))
b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]],
[[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
## Output files. ##
## -------------- ##
-# We do want M4 expansion after # for CPP macros.
-m4_changecom()
-m4_divert_push(0)dnl
-@output(b4_parser_file_name@)@
+b4_output_begin([b4_parser_file_name])
b4_copyright([Bison implementation for Yacc-like parsers in C])[
/* C LALR(1) parser skeleton written by Richard Stallman, by
#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]])])[
+#define yynerrs ]b4_prefix[nerrs
+]]b4_pure_if([], [[
+#define yylval ]b4_prefix[lval
+#define yychar ]b4_prefix[char]b4_locations_if([[
+#define yylloc ]b4_prefix[lloc]])]))[
/* Copy the first part of user declarations. */
]b4_user_pre_prologue[
# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
-/* In a future release of Bison, this section will be replaced
+]m4_ifval(m4_quote(b4_spec_defines_file),
+[[/* In a future release of Bison, this section will be replaced
by #include "@basename(]b4_spec_defines_file[@)". */
-]b4_shared_declarations[
+]])dnl
+b4_shared_declarations[
/* Copy the second part of user declarations. */
]b4_user_post_prologue
# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include <libintl.h> /* INFRINGES ON USER NAME SPACE */
-# define YY_(msgid) dgettext ("bison-runtime", msgid)
+# define YY_(Msgid) dgettext ("bison-runtime", Msgid)
# endif
# endif
# ifndef YY_
-# define YY_(msgid) msgid
+# define YY_(Msgid) Msgid
# endif
#endif
-/* Suppress unused-variable warnings by "using" E. */
-#ifdef __GNUC__
-# define YYUSE(e) ((void) (e))
-#else
-# define YYUSE(e) /* empty */
-#endif
+]b4_attribute_define[
#if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
# endif]])])[
# ifdef YYSTACK_ALLOC
- /* Pacify GCC's `empty if-body' warning. */
+ /* Pacify GCC's 'empty if-body' warning. */
# define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
# ifndef YYSTACK_ALLOC_MAXIMUM
/* The OS might guarantee only one guard page at the bottom of the stack,
#if ]b4_api_PREFIX[DEBUG
]b4_integral_parser_table_define([rline], [b4_rline],
- [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
+ [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
#endif
#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
#define YYPACT_NINF ]b4_pact_ninf[
-#define yypact_value_is_default(yystate) \
- ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
+#define yypact_value_is_default(Yystate) \
+ ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[
#define YYTABLE_NINF ]b4_table_ninf[
-#define yytable_value_is_error(yytable_value) \
- ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
+#define yytable_value_is_error(Yytable_value) \
+ ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[
]b4_parser_tables_define[
} \
while (0)
-
+/* Error token number */
#define YYTERROR 1
#define YYERRCODE 256
]b4_locations_if([[
]b4_yylloc_default_define[
#define YYRHSLOC(Rhs, K) ((Rhs)[K])
-
-/* YY_LOCATION_PRINT -- Print the location on the stream.
- This macro was not mandated originally: define only if we know
- we won't break user code: when these are the locations we know. */
-
-#ifndef YY_LOCATION_PRINT
-# if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
-# define YY_LOCATION_PRINT(File, Loc) \
- fprintf (File, "%d.%d-%d.%d", \
- (Loc).first_line, (Loc).first_column, \
- (Loc).last_line, (Loc).last_column)
-# else
-# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-# endif
-#endif]], [[
-
-
-/* This macro is provided for backward compatibility. */
-
-#ifndef YY_LOCATION_PRINT
-# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-#endif]])[
-
-
-/* YYLEX -- calling `yylex' with the right arguments. */
-
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
-#else
-# define YYLEX ]b4_function_call([yylex], [int], b4_lex_param)[
-#endif
+]])[
/* Enable debugging if requested. */
#if ]b4_api_PREFIX[DEBUG
YYFPRINTF Args; \
} while (0)
+]b4_yy_location_print_define[
+
# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
do { \
if (yydebug) \
{
YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
YYSIZE_T yysize = yysize0;
- YYSIZE_T yysize1;
enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
/* Internationalized format string. */
const char *yyformat = YY_NULL;
break;
}
yyarg[yycount++] = yytname[yyx];
- yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
- if (! (yysize <= yysize1
- && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
- return 2;
- yysize = yysize1;
+ {
+ YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
+ if (! (yysize <= yysize1
+ && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+ return 2;
+ yysize = yysize1;
+ }
}
}]b4_lac_if([[
# if ]b4_api_PREFIX[DEBUG
# undef YYCASE_
}
- yysize1 = yysize + yystrlen (yyformat);
- if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
- return 2;
- yysize = yysize1;
+ {
+ YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
+ if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+ return 2;
+ yysize = yysize1;
+ }
if (*yymsg_alloc < yysize)
{
yypstate *yyps_local;]b4_pure_if([[
int yychar;
YYSTYPE yylval;]b4_locations_if([[
- YYLTYPE yylloc;]])])[
+ static YYLTYPE yyloc_default][]b4_yyloc_default[;
+ YYLTYPE yylloc = yyloc_default;]])])[
if (yyps)
yyps_local = yyps;
else
}
}
do {
- yychar = YYLEX;
+ yychar = ]b4_lex[;
yystatus =
yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
} while (yystatus == YYPUSH_MORE);
[[[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 *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
b4_parse_param]))], [[
int yyn;
int yyresult;
/* Lookahead token as an internal (translated) token number. */
- int yytoken;
+ int yytoken = 0;
/* The variables used to return semantic value and location from the
action routines. */
YYSTYPE yyval;]b4_locations_if([[
goto yyread_pushed_token;
}]])[
- yytoken = 0;
- yyss = yyssa;
- yyvs = yyvsa;]b4_locations_if([[
- yyls = yylsa;]])[
+ yyssp = yyss = yyssa;
+ yyvsp = yyvs = yyvsa;]b4_locations_if([[
+ yylsp = yyls = yylsa;]])[
yystacksize = YYINITDEPTH;]b4_lac_if([[
yyes = yyesa;
yyerrstatus = 0;
yynerrs = 0;
yychar = YYEMPTY; /* Cause a token to be read. */
-
- /* Initialize stack pointers.
- Waste one element of value and location stack
- so that they stay on the same level as the state stack.
- The wasted elements are never initialized. */
- yyssp = yyss;
- yyvsp = yyvs;]b4_locations_if([[
- yylsp = yyls;
-
-#if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
- /* Initialize the default location before parsing starts. */
- yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
- yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
-#endif]])
-m4_ifdef([b4_initial_action],[
+]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],
- [m4_define([b4_at_dollar_used])yylloc])dnl
+ [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl
/* User initialization code. */
b4_user_initial_action
b4_dollar_popdef[]dnl
m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
-]])dnl
-m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
]])])dnl
+b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[;
+]])dnl
[ goto yysetstate;
/*------------------------------------------------------------.
yylval = *yypushed_val;]b4_locations_if([[
if (yypushed_loc)
yylloc = *yypushed_loc;]])])], [[
- yychar = YYLEX;]])[
+ yychar = ]b4_lex[;]])[
}
if (yychar <= YYEOF)
YY_LAC_DISCARD ("shift");]])[
yystate = yyn;
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
*++yyvsp = yylval;
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
]b4_locations_if([ *++yylsp = yylloc;])[
goto yynewstate;
yylen = yyr2[yyn];
/* If YYLEN is nonzero, implement the default value of the action:
- `$$ = $1'.
+ '$$ = $1'.
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
*++yyvsp = yyval;]b4_locations_if([
*++yylsp = yyloc;])[
- /* Now `shift' the result of the reduction. Determine what state
+ /* Now 'shift' the result of the reduction. Determine what state
that goes to, based on the state we popped back to and the rule
number reduced by. */
goto yyerrorlab;
]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
-]])[ /* Do not reclaim the symbols of the rule which action triggered
+]])[ /* Do not reclaim the symbols of the rule whose action triggered
this YYERROR. */
YYPOPSTACK (yylen);
yylen = 0;
current lookahead token, the shift below will for sure. */
YY_LAC_DISCARD ("error recovery");]])[
+ YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
*++yyvsp = yylval;
+ YY_IGNORE_MAYBE_UNINITIALIZED_END
]b4_locations_if([[
yyerror_range[2] = yylloc;
/* Using YYLLOC is tempting, but would change the location of
yydestruct ("Cleanup: discarding lookahead",
yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
}
- /* Do not reclaim the symbols of the rule which action triggered
+ /* Do not reclaim the symbols of the rule whose action triggered
this YYABORT or YYACCEPT. */
YYPOPSTACK (yylen);
YY_STACK_PRINT (yyss, yyssp);
return yyresult;
}
]b4_epilogue[]dnl
+b4_output_end()
+
b4_defines_if(
-[@output(b4_spec_defines_file@)@
-b4_copyright([Bison interface for Yacc-like parsers in C])[
+[b4_output_begin([b4_spec_defines_file])[
+]b4_copyright([Bison interface for Yacc-like parsers in C])[
]b4_shared_declarations[
-]])dnl b4_defines_if
-m4_divert_pop(0)
-m4_popdef([b4_copyright_years])
+]b4_output_end()
+])# b4_defines_if
projects / bison.git / blobdiff