m4_divert(-1) -*- Autoconf -*-
# C M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004, 2005, 2006 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
m4_define([b4_copyright],
[/* A Bison parser, made by GNU Bison b4_version. */
-/* $1,
- Copyright (C) $2 Free Software Foundation, Inc.
+/* $1
+
+m4_text_wrap([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
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. */])
+ Boston, MA 02110-1301, USA. */
+
+/* As a special exception, you may create a larger work that contains
+ part or all of the Bison parser skeleton and distribute that work
+ under terms of your choice, so long as that work isn't itself a
+ parser generator using the skeleton or a modified version thereof
+ as a parser skeleton. Alternatively, if you modify or redistribute
+ the parser skeleton itself, you may (at your option) remove this
+ special exception, which will cause the skeleton and the resulting
+ Bison output files to be licensed under the GNU General Public
+ License without this special exception.
+
+ This special exception was added by the Free Software Foundation in
+ version 2.2 of Bison. */])
# 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])
+
+# The initial column and line.
+m4_define_default([b4_location_initial_column], [1])
+m4_define_default([b4_location_initial_line], [1])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
-
# b4_user_args
# ------------
m4_define([b4_user_args],
m4_define([b4_parse_param],
b4_parse_param))
+
# b4_parse_param_for(DECL, FORMAL, BODY)
# ---------------------------------------
# Iterate over the user parameters, binding the declaration to DECL,
])dnl
])
+
## ------------ ##
## Data Types. ##
## ------------ ##
-
# b4_ints_in(INT1, INT2, LOW, HIGH)
# ---------------------------------
# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
m4_eval([0 <= $1]), [1], [unsigned int],
- [int])])
+ [int])])
# b4_int_type_for(NAME)
[b4_int_type($1_min, $1_max)])
+## ---------##
+## Values. ##
+## ---------##
+
+# 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])
+
+
## ------------------ ##
## Decoding options. ##
## ------------------ ##
+# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
+# -----------------------------------
+# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
+m4_define([b4_flag_if],
+[m4_case(b4_$1_flag,
+ [0], [$3],
+ [1], [$2],
+ [m4_fatal([invalid $1 value: ]$1)])])
-# 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],
- [$2])])
+# b4_define_flag_if(FLAG)
+# -----------------------
+# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
+# value of the Boolean FLAG.
+m4_define([b4_define_flag_if],
+[_b4_define_flag_if($[1], $[2], [$1])])
+
+# _b4_define_flag_if($1, $2, FLAG)
+# --------------------------------
+# This macro works around the impossibility to define macros
+# inside macros, because issuing `[$1]' is not possible in M4 :(.
+# This sucks hard, GNU M4 should really provide M5 like $$1.
+m4_define([_b4_define_flag_if],
+[m4_if([$1$2], $[1]$[2], [],
+ [m4_fatal([$0: Invalid arguments: $@])])dnl
+m4_define([b4_$3_if],
+ [b4_flag_if([$3], [$1], [$2])])])
+
+
+# b4_FLAG_if(IF-TRUE, IF-FALSE)
+# -----------------------------
+# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
+b4_define_flag_if([defines]) # Whether headers are requested.
+b4_define_flag_if([error_verbose]) # Whether error are verbose.
+b4_define_flag_if([locations]) # Whether locations are tracked.
+b4_define_flag_if([pure]) # Whether the interface is pure.
+b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
-# b4_pure_if(IF-TRUE, IF-FALSE)
+# b4_push_if(IF-TRUE, IF-FALSE)
# -----------------------------
-# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
-m4_define([b4_pure_if],
-[m4_if(b4_pure, [1],
+# Expand IF-TRUE, if %push-parser, IF-FALSE otherwise.
+m4_define([b4_push_if],
+[m4_if(b4_push_flag, [1],
[$1],
[$2])])
enum yytokentype {
m4_map_sep([ b4_token_enum], [,
],
- [$@])
+ [$@])
};
#endif
])])
# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -------------------------------------------------------------
-# Output the definition of the tokens (if there are) as enums and #defines.
+# Output the definition of the tokens (if there are any) as enums and, if POSIX
+# Yacc is enabled, as #defines.
m4_define([b4_token_enums_defines],
-[b4_token_enums($@)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_basename(NAME)
+# -----------------
+# Similar to POSIX basename; the differences don't matter here.
+# Beware that NAME is not evaluated.
+m4_define([b4_basename],
+[m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
+
+
# b4_syncline(LINE, FILE)
# -----------------------
m4_define([b4_syncline],
-[m4_if(b4_synclines_flag, 1,
- [[#]line $1 $2])])
+[b4_flag_if([synclines],
+[/* Line __line__ of b4_basename(m4_quote(__file__)). */
+[#]line $1 $2])])
+# b4_user_code(USER-CODE)
+# -----------------------
+# Emit code from the user, ending it with synclines.
+m4_define([b4_user_code],
+[$1
+b4_syncline([@oline@], [@ofile@])])
+
+
+# b4_define_user_code(MACRO)
+# --------------------------
+# From b4_MACRO, build b4_user_MACRO that includes the synclines.
+m4_define([b4_define_user_code],
+[m4_define([b4_user_$1],
+[b4_user_code([b4_$1])])])
+
+
+# b4_user_actions
+# b4_user_initial_action
+# b4_user_post_prologue
+# b4_user_start_header
+# b4_user_stype
+# ----------------------
+# Macros that issue user code, ending with synclines.
+b4_define_user_code([actions])
+b4_define_user_code([initial_action])
+b4_define_user_code([post_prologue])
+b4_define_user_code([start_header])
+b4_define_user_code([stype])
+
## -------------- ##
## 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