## ------------------------ ##
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), ])])
# 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_dquote(b4_pure_if([[[[YYSTYPE *yylval]], [[&yylval]]][]dnl
+b4_locations_if([, [[YYLTYPE *yylloc], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
m4_ifdef([b4_lex_param], b4_lex_param)))
/* The lookahead symbol. */
int yychar;
+]b4_pure_if([[
+#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
+/* Suppress an incorrect diagnostic about yylval being uninitialized. */
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
+ _Pragma ("GCC diagnostic push") \
+ _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
+ _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
+ _Pragma ("GCC diagnostic pop")
+#else
+/* Default value used for initialization, for pacifying older GCCs
+ or non-GCC compilers. */
+static YYSTYPE yyval_default;
+# define YY_INITIAL_VALUE(Value) = Value
+#endif]b4_locations_if([[
+static YYLTYPE yyloc_default][]b4_yyloc_default[;]])])[
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
+#endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
+#endif
+
/* The semantic value of the lookahead symbol. */
-YYSTYPE yylval;]b4_locations_if([[
+YYSTYPE yylval YY_INITIAL_VALUE(yyval_default);]b4_locations_if([[
/* Location data for the lookahead symbol. */
-YYLTYPE yylloc;]])b4_pure_if([], [[
+YYLTYPE yylloc]b4_pure_if([ = yyloc_default], [b4_yyloc_default])[;
+]])b4_pure_if([], [[
/* Number of syntax errors so far. */
int yynerrs;]])])
[[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 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))
+# define YYUSE(E) ((void) (E))
#else
-# define YYUSE(e) /* empty */
+# define YYUSE(E) /* empty */
#endif
#if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
#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]])[
-
+]])[
+]b4_yy_location_print_define[
/* YYLEX -- calling `yylex' with the right arguments. */
-
#ifdef YYLEX_PARAM
# define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
#else
{
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
[[[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]))], [[
goto yyread_pushed_token;
}]])[
- 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;
/*------------------------------------------------------------.
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;
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
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