## ------------------------ ##
-# b4_Pure_if(IF-TRUE, IF-FALSE)
+# b4_pure_if(IF-TRUE, IF-FALSE)
# -----------------------------
# Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
m4_define([b4_Pure_if],
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
-[yyvsp@<:@m4_eval([$2 - $1])@:>@m4_ifval([$3], [.$3])])
+[yyvsp@{m4_eval([$2 - $1])@}m4_ifval([$3], [.$3])])
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
-[yylsp@<:@m4_eval([$2 - $1])@:>@])
-
-
-
-## ------------------- ##
-## Output file names. ##
-## ------------------- ##
-
-m4_define_default([b4_input_suffix], [.y])
-
-m4_define_default([b4_output_parser_suffix],
-[m4_translit(b4_input_suffix, [yY], [cC])])
-
-m4_define_default([b4_output_parser_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_parser_suffix[]])
-
-
-m4_define_default([b4_output_header_suffix],
-[m4_translit(b4_input_suffix, [yY], [hH])])
-
-m4_define_default([b4_output_header_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_header_suffix[]])
-
-m4_define_default([b4_header_guard],
- [m4_bpatsubst(m4_toupper([BISON_]b4_output_header_name),
- [[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])])
+[yylsp@{m4_eval([$2 - $1])@}])
## Defining symbol actions, e.g., printers and destructors. ##
## --------------------------------------------------------- ##
-# b4_symbol_actions(FILENAME, LINENO,
-# SYMBOL-TAG, SYMBOL-NUM,
-# SYMBOL-ACTION, SYMBOL-TYPENAME)
-# -------------------------------------------------
-m4_define([b4_symbol_actions],
-[m4_pushdef([b4_dollar_dollar], [yyvalue.$6])dnl
-m4_pushdef([b4_at_dollar], [yylocation])dnl
- case $4: /* $3 */
-b4_syncline([$2], [$1])
- $5;
-b4_syncline([__oline__], [__ofile__])
- break;
-m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
-])
-
-
# We do want M4 expansion after # for CPP macros.
m4_changecom()
m4_divert(0)dnl
-#output "b4_output_parser_name"
+@output @output_parser_name@
b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
[1984, 1989, 1990, 2000, 2001, 2002])
[b4_syncline([b4_stype_line], [b4_filename])
typedef union b4_stype yystype;
/* Line __line__ of __file__. */
-b4_syncline([__oline__], [__ofile__])],
+b4_syncline([@oline@], [@ofile@])],
[typedef int yystype;])
# define YYSTYPE yystype
# define YYSTYPE_IS_TRIVIAL 1
b4_post_prologue
/* Line __line__ of __file__. */
-b4_syncline([__oline__], [__ofile__])
+b4_syncline([@oline@], [@ofile@])
#if ! defined (yyoverflow) || YYERROR_VERBOSE
/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
#define YYUNDEFTOK b4_undef_token_number
-#define YYMAXUTOK b4_user_token_number_max
+#define YYMAXUTOK b4_user_token_number_max[
-#define YYTRANSLATE(X) \
- ((unsigned)(X) <= YYMAXUTOK ? yytranslate[[X]] : YYUNDEFTOK)
+#define YYTRANSLATE(YYX) \
+ ((YYX <= 0) ? YYEOF : \
+ (unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
-/* YYTRANSLATE[[YYLEX]] -- Bison symbol number corresponding to YYLEX. */
-static const b4_int_type_for([b4_translate]) yytranslate[[]] =
+/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
+static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
{
- b4_translate
+ ]b4_translate
};
#if YYDEBUG
#endif
#define yyerrok (yyerrstatus = 0)
-#define yyclearin (yychar = YYEMPTY)
+#define yyclearin (yytoken = YYEMPTY)
#define YYEMPTY -2
#define YYEOF 0
#define YYBACKUP(Token, Value) \
do \
- if (yychar == YYEMPTY && yylen == 1) \
+ if (yytoken == YYEMPTY && yylen == 1) \
{ \
yychar = (Token); \
yylval = (Value); \
- yychar1 = YYTRANSLATE (yychar); \
+ yytoken = YYTRANSLATE (yychar); \
YYPOPSTACK; \
goto yybackup; \
} \
}
#endif /* YYDEBUG. */
-
-/*-----------------------------------------------.
-| Release the memory associated to this symbol. |
-`-----------------------------------------------*/
-
-b4_c_function_def([yydestruct],
- [static void],
- [[int yytype], [yytype]],
- [[YYSTYPE yyvalue], [yyvalue]]b4_location_if([,
- [[YYLTYPE yylocation], [yylocation]]]))
-{
- /* Pacify ``unused variable'' warnings. */
- (void) yyvalue;
-b4_location_if([ (void) yylocation;
-])dnl
-
- switch (yytype)
- {
-m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))dnl
- default:
- break;
- }
-}
-
+b4_yydestruct_generate([b4_c_function_def])
\f
/* Prevent warnings from -Wmissing-prototypes. */
/* Number of tokens to shift before error messages enabled. */
int yyerrstatus;
/* Lookahead token as an internal (translated) token number. */
- int yychar1 = 0;
+ int yytoken = 0;
/* Three stacks and their tools:
`yyss': related to states,
yystate = 0;
yyerrstatus = 0;
yynerrs = 0;
- yychar = YYEMPTY; /* Cause a token to be read. */
+ yychar = yytoken = YYEMPTY; /* Cause a token to be read. */
/* Initialize stack pointers.
Waste one element of value and location stack
/* Not known => get a lookahead token if don't already have one. */
- /* yychar is either YYEMPTY or YYEOF
- or a valid token in external form. */
-
- if (yychar == YYEMPTY)
+ /* YYTOKEN is either YYEMPTY or YYEOF or a valid token. */
+ if (yytoken == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;
+ yytoken = YYTRANSLATE (yychar);
}
- /* Convert token to internal form (in yychar1) for indexing tables with. */
-
- if (yychar <= 0) /* This means end of input. */
+ if (yytoken == YYEOF)
{
- yychar1 = 0;
- yychar = YYEOF; /* Don't call YYLEX any more. */
-
YYDPRINTF ((stderr, "Now at end of input.\n"));
}
else
{
- yychar1 = YYTRANSLATE (yychar);
-
/* We have to keep this `#if YYDEBUG', since we use variables
which are defined only if `YYDEBUG' is set. */
YYDPRINTF ((stderr, "Next token is "));
- YYDSYMPRINT ((stderr, yychar1, yylval]b4_location_if([, yyloc])[));
+ YYDSYMPRINT ((stderr, yytoken, yylval]b4_location_if([, yyloc])[));
YYDPRINTF ((stderr, "\n"));
}
- /* If the proper action on seeing token YYCHAR1 is to reduce or to
+ /* If the proper action on seeing token YYTOKEN is to reduce or to
detect an error, take that action. */
- yyn += yychar1;
- if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yychar1)
+ yyn += yytoken;
+ if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
goto yydefault;
yyn = yytable[yyn];
if (yyn <= 0)
/* Shift the lookahead token. */
YYDPRINTF ((stderr, "Shifting token %d (%s), ",
- yychar, yytname[yychar1]));
+ yytoken, yytname[yytoken]));
/* Discard the token being shifted unless it is eof. */
- if (yychar != YYEOF)
- yychar = YYEMPTY;
+ if (yytoken != YYEOF)
+ yytoken = YYEMPTY;
*++yyvsp = yylval;
]b4_location_if([ *++yylsp = yylloc;])[
}
/* Line __line__ of __file__. */
-b4_syncline([__oline__], [__ofile__])
+b4_syncline([@oline@], [@ofile@])
\f
[ yyvsp -= yylen;
yyssp -= yylen;
error, discard it. */
/* Return failure if at end of input. */
- if (yychar == YYEOF)
+ if (yytoken == YYEOF)
{
/* Pop the error token. */
YYPOPSTACK;
}
YYDPRINTF ((stderr, "Discarding token %d (%s).\n",
- yychar, yytname[yychar1]));
- yydestruct (yychar1, yylval]b4_location_if([, yylloc])[);
- yychar = YYEMPTY;
+ yytoken, yytname[yytoken]));
+ yydestruct (yytoken, yylval]b4_location_if([, yylloc])[);
+ yytoken = YYEMPTY;
}
/* Else will try to reuse lookahead token after shifting the error
b4_epilogue
m4_if(b4_defines_flag, 0, [],
-[#output "b4_output_header_name"
+[@output @output_header_name@
b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
[1984, 1989, 1990, 2000, 2001, 2002])
This special exception was added by the Free Software Foundation
in version 1.24 of Bison. */
-#ifndef b4_header_guard
-# define b4_header_guard
-
b4_token_defines(b4_tokens)
#ifndef YYSTYPE
[b4_syncline([b4_stype_line], [b4_filename])
typedef union b4_stype yystype;
/* Line __line__ of __file__. */
-b4_syncline([__oline__], [__ofile__])],
+b4_syncline([@oline@], [@ofile@])],
[typedef int yystype;])
# define YYSTYPE yystype
+# define YYSTYPE_IS_TRIVIAL 1
#endif
b4_pure_if([],
m4_if(b4_pure, [0],
[extern YYLTYPE b4_prefix[]lloc;])
])
-#endif /* not b4_header_guard */
])
projects / bison.git / blobdiff