# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
-
## ---------------- ##
## Identification. ##
## ---------------- ##
-# b4_copyright(TITLE, YEARS)
-# --------------------------
-m4_define([b4_copyright],
-[/* A Bison parser, made by GNU Bison b4_version. */
-
-/* $1,
- Copyright (C) $2 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
- the Free Software Foundation; either version 2, 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. */])
-
+# b4_comment(TEXT)
+# ----------------
+m4_define([b4_comment], [/* m4_bpatsubst([$1], [
+], [
+ ]) */])
# b4_identification
# -----------------
[#]define YYSKELETON_NAME b4_skeleton
/* Pure parsers. */
-[#]define YYPURE b4_pure
+[#]define YYPURE b4_pure_flag
+
+/* Push parsers. */
+[#]define YYPUSH b4_push_flag
/* Using locations. */
[#]define YYLSP_NEEDED b4_locations_flag
])
-
## ---------------- ##
## Default values. ##
## ---------------- ##
-m4_define_default([b4_epilogue], [])
-
+# If the %union is not named, its name is YYSTYPE.
+m4_define_default([b4_union_name], [YYSTYPE])
+# If the %name-prefix is not given, it is yy.
+m4_define_default([b4_prefix], [yy])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
-
# b4_user_args
# ------------
m4_define([b4_user_args],
# --------------
# If defined, b4_parse_param arrives double quoted, but below we prefer
# it to be single quoted.
-m4_define_default([b4_parse_param])
m4_define([b4_parse_param],
b4_parse_param))
])dnl
])
+
## ------------ ##
## Data Types. ##
## ------------ ##
-
-# b4_ints_in(INT1, INT2, LOW, HIGH)
-# ---------------------------------
-# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
-m4_define([b4_ints_in],
-[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
-
-
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
m4_eval([0 <= $1]), [1], [unsigned int],
- [int])])
+ [int])])
# b4_int_type_for(NAME)
m4_define([b4_int_type_for],
[b4_int_type($1_min, $1_max)])
+## ---------##
+## Values. ##
+## ---------##
-## ------------------ ##
-## Decoding options. ##
-## ------------------ ##
-
-
-# b4_error_verbose_if(IF-TRUE, IF-FALSE)
-# --------------------------------------
-# Expand IF-TRUE, if errors are verbose, IF-FALSE otherwise.
-m4_define([b4_error_verbose_if],
-[m4_if(b4_error_verbose, [1],
- [$1],
- [$2])])
-
-
-# b4_location_if(IF-TRUE, IF-FALSE)
-# ---------------------------------
-# Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
-m4_define([b4_location_if],
-[m4_if(b4_locations_flag, [1],
- [$1],
- [$2])])
-
-
-# b4_pure_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
-m4_define([b4_pure_if],
-[m4_if(b4_pure, [1],
- [$1],
- [$2])])
-
+# b4_null
+---------
+# Return a null pointer constant. NULL infringes on the user name
+# space in C, so use 0 rather than NULL.
+m4_define([b4_null], [0])
## ------------------------- ##
enum yytokentype {
m4_map_sep([ b4_token_enum], [,
],
- [$@])
+ [$@])
};
#endif
])])
# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -------------------------------------------------------------
-# Output the definition of the tokens (if there are) as enums and #defines.
+# Output the definition of the tokens (if there are any) as enums and, if POSIX
+# Yacc is enabled, as #defines.
m4_define([b4_token_enums_defines],
-[b4_token_enums($@)b4_token_defines($@)
+[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
])
## --------------------------------------------- ##
+# b4_modern_c
+# -----------
+# A predicate useful in #if to determine whether C is ancient or modern.
+#
+# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run
+# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
+# reasons, but it defines __C99__FUNC__ so check that as well.
+# Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
+# Consider a C++ compiler to be modern if it defines __cplusplus.
+#
+m4_define([b4_c_modern],
+ [[(defined __STDC__ || defined __C99__FUNC__ \
+ || defined __cplusplus || defined _MSC_VER)]])
+
# b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# ----------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_function_def],
-[#if defined (__STDC__) || defined (__C99__FUNC__) || defined (__cplusplus)
+[#if b4_c_modern
b4_c_ansi_function_def($@)
#else
$2
# Output the arguments ANSI-C definition.
m4_define([b4_c_ansi_formals],
[m4_case([$@],
- [], [void],
- [[]], [void],
- [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+ [], [void],
+ [[]], [void],
+ [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
m4_define([b4_c_ansi_formal],
[$1])
# Output the K&R argument declarations.
m4_define([b4_c_knr_formal_decls],
[m4_map_sep([b4_c_knr_formal_decl],
- [
+ [
],
- [$@])])
+ [$@])])
m4_define([b4_c_knr_formal_decl],
[ $1;])
# -----------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_function_decl],
-[#if defined (__STDC__) || defined (__cplusplus)
+[#if defined __STDC__ || defined __cplusplus
b4_c_ansi_function_decl($@)
#else
$2 $1 ();
## Synclines. ##
## ----------- ##
-# b4_syncline(LINE, FILE)
+# b4_sync_start(LINE, FILE)
# -----------------------
-m4_define([b4_syncline],
-[m4_if(b4_synclines_flag, 1,
- [[#]line $1 $2])])
-
+m4_define([b4_sync_start], [[#]line $1 $2])
## -------------- ##
## User actions. ##
## -------------- ##
+# b4_case(LABEL, STATEMENTS)
+# --------------------------
+m4_define([b4_case],
+[ case $1:
+$2
+ break;])
+
# b4_symbol_actions(FILENAME, LINENO,
# SYMBOL-TAG, SYMBOL-NUM,
# SYMBOL-ACTION, SYMBOL-TYPENAME)
m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
case $4: /* $3 */
b4_syncline([$2], [$1])
- $5;
+ $5;
b4_syncline([@oline@], [@ofile@])
- break;
+ break;
m4_popdef([b4_at_dollar])dnl
m4_popdef([b4_dollar_dollar])dnl
])
[[const char *yymsg], [yymsg]],
[[int yytype], [yytype]],
[[YYSTYPE *yyvaluep], [yyvaluep]][]dnl
-b4_location_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
+b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
YYUSE (yyvaluep);
-]b4_location_if([ YYUSE (yylocationp);
+]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
default:
- break;
+ break;
}
}]dnl
])
/*ARGSUSED*/
]$1([yy_symbol_value_print],
[static void],
- [[FILE *yyoutput], [yyoutput]],
- [[int yytype], [yytype]],
- [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl
-b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]dnl
+ [[FILE *yyoutput], [yyoutput]],
+ [[int yytype], [yytype]],
+ [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
+b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
- YYUSE (yyvaluep);
-]b4_location_if([ YYUSE (yylocationp);
+ if (!yyvaluep)
+ return;
+]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[# ifdef YYPRINT
if (yytype < YYNTOKENS)
YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
+# else
+ YYUSE (yyoutput);
# endif
switch (yytype)
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
[ default:
- break;
+ break;
}
}
]$1([yy_symbol_print],
[static void],
- [[FILE *yyoutput], [yyoutput]],
- [[int yytype], [yytype]],
- [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl
-b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]dnl
+ [[FILE *yyoutput], [yyoutput]],
+ [[int yytype], [yytype]],
+ [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
+b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
if (yytype < YYNTOKENS)
else
YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
-]b4_location_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
+]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
YYFPRINTF (yyoutput, ": ");
])dnl
[ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
-b4_location_if([, yylocationp])[]b4_user_args[);
+b4_locations_if([, yylocationp])[]b4_user_args[);
YYFPRINTF (yyoutput, ")");
}]dnl
])
projects / bison.git / blobdiff