-m4_divert(-1) -*- Autoconf -*-
+ -*- Autoconf -*-
# C M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
+# Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# 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 of the License, or
+# the Free Software Foundation, either version 3 of the License, 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
-
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
## ---------------- ##
## Identification. ##
## ---------------- ##
-# b4_copyright(TITLE, YEARS)
-# --------------------------
-m4_define([b4_copyright],
-[/* A Bison parser, made by GNU Bison b4_version. */
-
-/* $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
- 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. */
-
-/* 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_comment(TEXT)
+# ----------------
+# 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]).
+m4_define([b4_comment], [/* m4_bpatsubst([$1], [
+\(.\)], [
+ \1]) */])
# 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.
m4_define([b4_identification],
-[/* Identify Bison output. */
-[#]define YYBISON 1
+[[/* Identify Bison output. */
+#define YYBISON 1
/* Bison version. */
-[#]define YYBISON_VERSION "b4_version"
+#define YYBISON_VERSION "]b4_version["
/* Skeleton name. */
-[#]define YYSKELETON_NAME b4_skeleton
+#define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
/* Pure parsers. */
-[#]define YYPURE b4_pure_flag
+#define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
-/* Using locations. */
-[#]define YYLSP_NEEDED b4_locations_flag
-])
+/* Push parsers. */
+#define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
+/* Pull parsers. */
+#define YYPULL ]b4_pull_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))
+b4_parse_param)
# b4_parse_param_for(DECL, FORMAL, BODY)
# the formal name to FORMAL, and evaluating the BODY.
m4_define([b4_parse_param_for],
[m4_foreach([$1_$2], m4_defn([b4_parse_param]),
-[m4_pushdef([$1], m4_fst($1_$2))dnl
+[m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
m4_pushdef([$2], m4_shift($1_$2))dnl
$3[]dnl
m4_popdef([$2])dnl
])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
[b4_int_type($1_min, $1_max)])
-## ------------------ ##
-## 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: ]$1)])])
+## ---------##
+## Values. ##
+## ---------##
+# b4_null
+---------
+# Return a null pointer constant. NULL infringes on the user name
+# space in C, so use 0 rather than NULL.
+m4_define([b4_null], [0])
-# b4_define_flag_if(FLAG)
-# -----------------------
-# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
-# value of the Boolean FLAG.
-m4_define([b4_define_flag_if],
-[_b4_define_flag_if($[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 $$1.
-m4_define([_b4_define_flag_if],
-[m4_if([$1$2], $[1]$[2], [],
- [m4_fatal([$0: Invalid arguments: $@])])dnl
-m4_define([b4_$3_if],
- [b4_flag_if([$3], [$1], [$2])])])
-
-
-# b4_FLAG_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
-b4_define_flag_if([defines]) # Whether headers are requested.
-b4_define_flag_if([error_verbose]) # Wheter error are verbose.
-b4_define_flag_if([locations]) # Whether locations are tracked.
-b4_define_flag_if([pure]) # Whether the interface is pure.
-b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
# -----------------------------------------
# Output the definition of this token as #define.
m4_define([b4_token_define],
-[#define $1 $2
+[#define b4_percent_define_get([token.prefix])$1 $2
])
# -------------------------------------------------------
# Output the definition of the tokens (if there are) as #defines.
m4_define([b4_token_defines],
-[m4_if([$@], [[]], [],
+[m4_if([$#$1], [1], [],
[/* Tokens. */
m4_map([b4_token_define], [$@])])
])
# ---------------------------------------
# Output the definition of this token as an enum.
m4_define([b4_token_enum],
-[$1 = $2])
+[b4_percent_define_get([token.prefix])$1 = $2])
# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -----------------------------------------------------
# Output the definition of the tokens (if there are) as enums.
m4_define([b4_token_enums],
-[m4_if([$@], [[]], [],
+[m4_if([$#$1], [1], [],
[/* Tokens. */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
])
+## ----------------- ##
+## Semantic Values. ##
+## ----------------- ##
+
+
+# b4_symbol_value(VAL, [TYPE])
+# ----------------------------
+# Given a semantic value VAL ($$, $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], [.$2]))])
+
+
## --------------------------------------------- ##
## Defining C functions in both K&R and ANSI-C. ##
b4_c_ansi_function_def($@)
#else
$2
-$1 (b4_c_knr_formal_names(m4_shiftn(2, $@)))
-b4_c_knr_formal_decls(m4_shiftn(2, $@))
+$1 (b4_c_knr_formal_names(m4_shift2($@)))
+b4_c_knr_formal_decls(m4_shift2($@))
#endif[]dnl
])
# Declare the function NAME in ANSI.
m4_define([b4_c_ansi_function_def],
[$2
-$1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl
+$1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
])
# --------------------------------------
# Output the arguments ANSI-C definition.
m4_define([b4_c_ansi_formals],
-[m4_case([$@],
- [], [void],
- [[]], [void],
+[m4_if([$#], [0], [void],
+ [$#$1], [1], [void],
[m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
m4_define([b4_c_ansi_formal],
# ----------------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_ansi_function_decl],
-[$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl
+[$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
])
# -----------------------------------------------------------
# Call the function NAME with arguments NAME1, NAME2 etc.
m4_define([b4_c_function_call],
-[$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl
+[$1 (b4_c_args(m4_shift2($@)))[]dnl
])
## Synclines. ##
## ----------- ##
-# b4_syncline(LINE, FILE)
+# b4_sync_start(LINE, FILE)
# -----------------------
-m4_define([b4_syncline],
-[b4_flag_if([synclines], [[#]line $1 $2])])
-
+m4_define([b4_sync_start], [[#]line $1 $2])
## -------------- ##
## User actions. ##
## -------------- ##
+# b4_case(LABEL, STATEMENTS)
+# --------------------------
+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
+ [b4_symbol_value([(*yyvaluep)], [$6])])dnl
m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
case $4: /* $3 */
b4_syncline([$2], [$1])
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