-*- Autoconf -*-
# C M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+
+# Copyright (C) 2002, 2004-2012 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
## Identification. ##
## ---------------- ##
-# b4_comment(TEXT)
-# ----------------
-m4_define([b4_comment], [/* m4_bpatsubst([$1], [
-], [
- ]) */])
+# b4_comment_(TEXT, OPEN, CONTINUE, END)
+# -------------------------------------
+# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines.
+# Avoid adding indentation to the first line, as the indentation comes
+# from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]).
+#
+# Prefix all the output lines with PREFIX.
+m4_define([b4_comment_], [$2[]m4_bpatsubst([$1], [
+\(.\)], [
+$3\1])$4])
+
+
+# b4_c_comment(TEXT, [PREFIX])
+# ----------------------------
+# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines.
+# Avoid adding indentation to the first line, as the indentation comes
+# from "/*". That's why we don't patsubst([$1], [^\(.\)], [ \1]).
+#
+# Prefix all the output lines with PREFIX.
+m4_define([b4_c_comment],
+[b4_comment_([$1], [$2/* ], [$2 ], [$2 */])])
+
+
+# b4_comment(TEXT, [PREFIX])
+# --------------------------
+# By default, C comments.
+m4_define([b4_comment], [b4_c_comment($@)])
+
# b4_identification
# -----------------
# Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
# b4_pull_flag if they use the values of the %define variables api.pure or
-# api.push_pull.
+# api.push-pull.
m4_define([b4_identification],
[[/* Identify Bison output. */
#define YYBISON 1
#define YYPULL ]b4_pull_flag])[
/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
+#define YYLSP_NEEDED ]b4_locations_if([1], [0])[
]])
m4_popdef([$1])dnl
])])
-# b4_parse_param_use
-# ------------------
-# `YYUSE' all the parse-params.
+# b4_parse_param_use([VAL], [LOC])
+# --------------------------------
+# `YYUSE' VAL, LOC if locations are enabled, and all the parse-params.
m4_define([b4_parse_param_use],
-[b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
+[m4_ifvaln([$1], [ YYUSE([$1]);])dnl
+b4_locations_if([m4_ifvaln([$2], [ YYUSE ([$2]);])])dnl
+b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
])dnl
])
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)])
+
+# b4_table_value_equals(TABLE, VALUE, LITERAL)
+# --------------------------------------------
+# Without inducing a comparison warning from the compiler, check if the
+# literal value LITERAL equals VALUE from table TABLE, which must have
+# TABLE_min and TABLE_max defined. YYID must be defined as an identity
+# function that suppresses warnings about constant conditions.
+m4_define([b4_table_value_equals],
+[m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
+ || m4_indir([b4_]$1[_max]) < $3), [1],
+ [[YYID (0)]],
+ [[((]$2[) == (]$3[))]])])
+
+
## ---------##
## Values. ##
## ---------##
+
+# b4_null_define
+# --------------
+# Portability issues: define a YY_NULL appropriate for the current
+# language (C, C++98, or C++11).
+m4_define([b4_null_define],
+[# ifndef YY_NULL
+# if defined __cplusplus && 201103L <= __cplusplus
+# define YY_NULL nullptr
+# else
+# define YY_NULL 0
+# endif
+# endif[]dnl
+])
+
+
# 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])
+# -------
+# Return a null pointer constant.
+m4_define([b4_null], [YY_NULL])
+
+# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
+# -------------------------------------------------------------
+# Define "yy<TABLE-NAME>" which contents is CONTENT.
+m4_define([b4_integral_parser_table_define],
+[m4_ifvaln([$3], [b4_c_comment([$3], [ ])])dnl
+static const b4_int_type_for([$2]) yy$1[[]] =
+{
+ $2
+};dnl
+])
## ------------------------- ##
# -----------------------------------------
# Output the definition of this token as #define.
m4_define([b4_token_define],
-[#define $1 $2
+[#define b4_percent_define_get([api.tokens.prefix])$1 $2
])
# ---------------------------------------
# Output the definition of this token as an enum.
m4_define([b4_token_enum],
-[$1 = $2])
+[b4_percent_define_get([api.tokens.prefix])$1 = $2])
# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
enum yytokentype {
m4_map_sep([ b4_token_enum], [,
],
- [$@])
+ [$@])
};
#endif
])])
])
+## ----------------- ##
+## Semantic Values. ##
+## ----------------- ##
+
+
+# b4_symbol_value(VAL, [TYPE])
+# ----------------------------
+# Given a semantic value VAL ($$, $1 etc.), extract its value of type
+# TYPE if TYPE is given, otherwise just return VAL. The result can be
+# used safetly, it is put in parens to avoid nasty precedence issues.
+# TYPE is *not* put in braces, provide some if needed.
+m4_define([b4_symbol_value],
+[($1[]m4_ifval([$2], [.$2]))])
+
+
## --------------------------------------------- ##
## Defining C functions in both K&R and ANSI-C. ##
m4_define([b4_c_ansi_formals],
[m4_if([$#], [0], [void],
[$#$1], [1], [void],
- [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+ [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],
[ $1;])
# -----------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_function_decl],
-[#if defined __STDC__ || defined __cplusplus
+[#if b4_c_modern
b4_c_ansi_function_decl($@)
#else
$2 $1 ();
m4_define([b4_case],
[ case $1:
$2
+b4_syncline([@oline@], [@ofile@])
break;])
-# b4_symbol_actions(FILENAME, LINENO,
-# SYMBOL-TAG, SYMBOL-NUM,
-# SYMBOL-ACTION, SYMBOL-TYPENAME)
-# -------------------------------------------------
-m4_define([b4_symbol_actions],
-[m4_pushdef([b4_dollar_dollar],
- [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
-m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
- case $4: /* $3 */
-b4_syncline([$2], [$1])
- $5;
+
+# b4_predicate_case(LABEL, CONDITIONS)
+# ------------------------------------
+m4_define([b4_predicate_case],
+[ case $1:
+ if (! ($2)) YYERROR;
b4_syncline([@oline@], [@ofile@])
- break;
-m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
-])
+ break;])
# b4_yydestruct_generate(FUNCTION-DECLARATOR)
b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
- YYUSE (yyvaluep);
-]b4_locations_if([ YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[
- if (!yymsg)
+]b4_parse_param_use([yyvaluep], [yylocationp])dnl
+[ if (!yymsg)
yymsg = "Deleting";
YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
switch (yytype)
{
-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
- default:
- break;
+]b4_symbol_foreach([b4_symbol_destructor])dnl
+[ default:
+ break;
}
}]dnl
])
/*ARGSUSED*/
]$1([yy_symbol_value_print],
[static void],
- [[FILE *yyoutput], [yyoutput]],
- [[int yytype], [yytype]],
- [[YYSTYPE const * const yyvaluep], [yyvaluep]][]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 (!yyvaluep)
- return;
-]b4_locations_if([ YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[# ifdef YYPRINT
+]b4_parse_param_use([yyoutput], [yylocationp])dnl
+[ if (!yyvaluep)
+ return;]
+dnl glr.c does not feature yytoknum.
+m4_if(b4_skeleton, ["yacc.c"],
+[[# ifdef YYPRINT
if (yytype < YYNTOKENS)
YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# else
- YYUSE (yyoutput);
# endif
- switch (yytype)
+]])dnl
+[ switch (yytype)
{
-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+]b4_symbol_foreach([b4_symbol_printer])dnl
[ default:
- break;
+ break;
}
}
]$1([yy_symbol_print],
[static void],
- [[FILE *yyoutput], [yyoutput]],
- [[int yytype], [yytype]],
- [[YYSTYPE const * const yyvaluep], [yyvaluep]][]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]))[
{
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