[270] | 1 | -*- Autoconf -*-
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| 2 |
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| 3 | # C M4 Macros for Bison.
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| 4 | # Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
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| 5 | # Foundation, Inc.
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| 6 |
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| 7 | # This program is free software: you can redistribute it and/or modify
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| 8 | # it under the terms of the GNU General Public License as published by
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| 9 | # the Free Software Foundation, either version 3 of the License, or
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| 10 | # (at your option) any later version.
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| 11 | #
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| 12 | # This program is distributed in the hope that it will be useful,
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | # GNU General Public License for more details.
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| 16 | #
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| 17 | # You should have received a copy of the GNU General Public License
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| 18 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 19 |
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| 20 | ## ---------------- ##
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| 21 | ## Identification. ##
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| 22 | ## ---------------- ##
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| 23 |
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| 24 | # b4_comment(TEXT)
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| 25 | # ----------------
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| 26 | m4_define([b4_comment], [/* m4_bpatsubst([$1], [
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| 27 | ], [
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| 28 | ]) */])
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| 29 |
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| 30 | # b4_identification
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| 31 | # -----------------
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| 32 | # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
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| 33 | # b4_pull_flag if they use the values of the %define variables api.pure or
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| 34 | # api.push_pull.
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| 35 | m4_define([b4_identification],
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| 36 | [[/* Identify Bison output. */
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| 37 | #define YYBISON 1
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| 38 |
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| 39 | /* Bison version. */
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| 40 | #define YYBISON_VERSION "]b4_version["
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| 41 |
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| 42 | /* Skeleton name. */
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| 43 | #define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
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| 44 |
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| 45 | /* Pure parsers. */
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| 46 | #define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
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| 47 |
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| 48 | /* Push parsers. */
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| 49 | #define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
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| 50 |
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| 51 | /* Pull parsers. */
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| 52 | #define YYPULL ]b4_pull_flag])[
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| 53 |
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| 54 | /* Using locations. */
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| 55 | #define YYLSP_NEEDED ]b4_locations_flag[
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| 56 | ]])
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| 57 |
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| 58 |
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| 59 | ## ---------------- ##
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| 60 | ## Default values. ##
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| 61 | ## ---------------- ##
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| 62 |
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| 63 | # If the %union is not named, its name is YYSTYPE.
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| 64 | m4_define_default([b4_union_name], [YYSTYPE])
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| 65 |
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| 66 | # If the %name-prefix is not given, it is yy.
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| 67 | m4_define_default([b4_prefix], [yy])
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| 68 |
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| 69 | ## ------------------------ ##
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| 70 | ## Pure/impure interfaces. ##
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| 71 | ## ------------------------ ##
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| 72 |
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| 73 | # b4_user_args
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| 74 | # ------------
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| 75 | m4_define([b4_user_args],
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| 76 | [m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
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| 77 |
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| 78 |
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| 79 | # b4_parse_param
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| 80 | # --------------
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| 81 | # If defined, b4_parse_param arrives double quoted, but below we prefer
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| 82 | # it to be single quoted.
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| 83 | m4_define([b4_parse_param],
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| 84 | b4_parse_param)
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| 85 |
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| 86 |
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| 87 | # b4_parse_param_for(DECL, FORMAL, BODY)
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| 88 | # ---------------------------------------
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| 89 | # Iterate over the user parameters, binding the declaration to DECL,
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| 90 | # the formal name to FORMAL, and evaluating the BODY.
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| 91 | m4_define([b4_parse_param_for],
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| 92 | [m4_foreach([$1_$2], m4_defn([b4_parse_param]),
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| 93 | [m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
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| 94 | m4_pushdef([$2], m4_shift($1_$2))dnl
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| 95 | $3[]dnl
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| 96 | m4_popdef([$2])dnl
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| 97 | m4_popdef([$1])dnl
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| 98 | ])])
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| 99 |
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| 100 | # b4_parse_param_use
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| 101 | # ------------------
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| 102 | # `YYUSE' all the parse-params.
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| 103 | m4_define([b4_parse_param_use],
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| 104 | [b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
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| 105 | ])dnl
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| 106 | ])
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| 107 |
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| 108 |
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| 109 | ## ------------ ##
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| 110 | ## Data Types. ##
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| 111 | ## ------------ ##
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| 112 |
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| 113 | # b4_int_type(MIN, MAX)
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| 114 | # ---------------------
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| 115 | # Return the smallest int type able to handle numbers ranging from
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| 116 | # MIN to MAX (included).
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| 117 | m4_define([b4_int_type],
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| 118 | [m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
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| 119 | b4_ints_in($@, [-128], [127]), [1], [signed char],
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| 120 |
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| 121 | b4_ints_in($@, [0], [65535]), [1], [unsigned short int],
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| 122 | b4_ints_in($@, [-32768], [32767]), [1], [short int],
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| 123 |
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| 124 | m4_eval([0 <= $1]), [1], [unsigned int],
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| 125 |
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| 126 | [int])])
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| 127 |
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| 128 |
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| 129 | # b4_int_type_for(NAME)
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| 130 | # ---------------------
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| 131 | # Return the smallest int type able to handle numbers ranging from
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| 132 | # `NAME_min' to `NAME_max' (included).
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| 133 | m4_define([b4_int_type_for],
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| 134 | [b4_int_type($1_min, $1_max)])
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| 135 |
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| 136 |
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| 137 |
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| 138 | ## ---------##
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| 139 | ## Values. ##
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| 140 | ## ---------##
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| 141 |
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| 142 | # b4_null
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| 143 | ---------
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| 144 | # Return a null pointer constant. NULL infringes on the user name
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| 145 | # space in C, so use 0 rather than NULL.
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| 146 | m4_define([b4_null], [0])
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| 147 |
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| 148 |
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| 149 |
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| 150 |
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| 151 | ## ------------------------- ##
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| 152 | ## Assigning token numbers. ##
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| 153 | ## ------------------------- ##
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| 154 |
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| 155 | # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
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| 156 | # -----------------------------------------
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| 157 | # Output the definition of this token as #define.
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| 158 | m4_define([b4_token_define],
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| 159 | [#define $1 $2
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| 160 | ])
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| 161 |
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| 162 |
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| 163 | # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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| 164 | # -------------------------------------------------------
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| 165 | # Output the definition of the tokens (if there are) as #defines.
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| 166 | m4_define([b4_token_defines],
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| 167 | [m4_if([$#$1], [1], [],
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| 168 | [/* Tokens. */
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| 169 | m4_map([b4_token_define], [$@])])
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| 170 | ])
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| 171 |
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| 172 |
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| 173 | # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
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| 174 | # ---------------------------------------
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| 175 | # Output the definition of this token as an enum.
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| 176 | m4_define([b4_token_enum],
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| 177 | [$1 = $2])
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| 178 |
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| 179 |
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| 180 | # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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| 181 | # -----------------------------------------------------
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| 182 | # Output the definition of the tokens (if there are) as enums.
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| 183 | m4_define([b4_token_enums],
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| 184 | [m4_if([$#$1], [1], [],
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| 185 | [/* Tokens. */
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| 186 | #ifndef YYTOKENTYPE
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| 187 | # define YYTOKENTYPE
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| 188 | /* Put the tokens into the symbol table, so that GDB and other debuggers
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| 189 | know about them. */
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| 190 | enum yytokentype {
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| 191 | m4_map_sep([ b4_token_enum], [,
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| 192 | ],
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| 193 | [$@])
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| 194 | };
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| 195 | #endif
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| 196 | ])])
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| 197 |
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| 198 |
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| 199 | # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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| 200 | # -------------------------------------------------------------
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| 201 | # Output the definition of the tokens (if there are any) as enums and, if POSIX
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| 202 | # Yacc is enabled, as #defines.
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| 203 | m4_define([b4_token_enums_defines],
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| 204 | [b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
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| 205 | ])
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| 206 |
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| 207 |
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| 208 |
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| 209 | ## --------------------------------------------- ##
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| 210 | ## Defining C functions in both K&R and ANSI-C. ##
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| 211 | ## --------------------------------------------- ##
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| 212 |
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| 213 |
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| 214 | # b4_modern_c
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| 215 | # -----------
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| 216 | # A predicate useful in #if to determine whether C is ancient or modern.
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| 217 | #
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| 218 | # If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run
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| 219 | # as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
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| 220 | # reasons, but it defines __C99__FUNC__ so check that as well.
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| 221 | # Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
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| 222 | # Consider a C++ compiler to be modern if it defines __cplusplus.
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| 223 | #
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| 224 | m4_define([b4_c_modern],
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| 225 | [[(defined __STDC__ || defined __C99__FUNC__ \
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| 226 | || defined __cplusplus || defined _MSC_VER)]])
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| 227 |
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| 228 | # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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| 229 | # ----------------------------------------------------------
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| 230 | # Declare the function NAME.
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| 231 | m4_define([b4_c_function_def],
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| 232 | [#if b4_c_modern
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| 233 | b4_c_ansi_function_def($@)
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| 234 | #else
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| 235 | $2
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| 236 | $1 (b4_c_knr_formal_names(m4_shift2($@)))
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| 237 | b4_c_knr_formal_decls(m4_shift2($@))
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| 238 | #endif[]dnl
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| 239 | ])
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| 240 |
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| 241 |
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| 242 | # b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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| 243 | # ---------------------------------------------------------------
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| 244 | # Declare the function NAME in ANSI.
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| 245 | m4_define([b4_c_ansi_function_def],
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| 246 | [$2
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| 247 | $1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
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| 248 | ])
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| 249 |
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| 250 |
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| 251 | # b4_c_ansi_formals([DECL1, NAME1], ...)
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| 252 | # --------------------------------------
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| 253 | # Output the arguments ANSI-C definition.
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| 254 | m4_define([b4_c_ansi_formals],
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| 255 | [m4_if([$#], [0], [void],
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| 256 | [$#$1], [1], [void],
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| 257 | [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
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| 258 |
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| 259 | m4_define([b4_c_ansi_formal],
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| 260 | [$1])
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| 261 |
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| 262 |
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| 263 | # b4_c_knr_formal_names([DECL1, NAME1], ...)
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| 264 | # ------------------------------------------
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| 265 | # Output the argument names.
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| 266 | m4_define([b4_c_knr_formal_names],
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| 267 | [m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
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| 268 |
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| 269 | m4_define([b4_c_knr_formal_name],
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| 270 | [$2])
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| 271 |
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| 272 |
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| 273 | # b4_c_knr_formal_decls([DECL1, NAME1], ...)
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| 274 | # ------------------------------------------
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| 275 | # Output the K&R argument declarations.
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| 276 | m4_define([b4_c_knr_formal_decls],
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| 277 | [m4_map_sep([b4_c_knr_formal_decl],
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| 278 | [
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| 279 | ],
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| 280 | [$@])])
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| 281 |
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| 282 | m4_define([b4_c_knr_formal_decl],
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| 283 | [ $1;])
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| 284 |
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| 285 |
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| 286 |
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| 287 | ## ------------------------------------------------------------ ##
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| 288 | ## Declaring (prototyping) C functions in both K&R and ANSI-C. ##
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| 289 | ## ------------------------------------------------------------ ##
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| 290 |
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| 291 |
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| 292 | # b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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| 293 | # -----------------------------------------------------------
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| 294 | # Declare the function NAME.
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| 295 | m4_define([b4_c_function_decl],
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| 296 | [#if defined __STDC__ || defined __cplusplus
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| 297 | b4_c_ansi_function_decl($@)
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| 298 | #else
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| 299 | $2 $1 ();
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| 300 | #endif[]dnl
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| 301 | ])
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| 302 |
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| 303 |
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| 304 | # b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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| 305 | # ----------------------------------------------------------------
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| 306 | # Declare the function NAME.
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| 307 | m4_define([b4_c_ansi_function_decl],
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| 308 | [$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
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| 309 | ])
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| 310 |
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| 311 |
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| 312 |
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| 313 |
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| 314 | ## --------------------- ##
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| 315 | ## Calling C functions. ##
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| 316 | ## --------------------- ##
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| 317 |
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| 318 |
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| 319 | # b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
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| 320 | # -----------------------------------------------------------
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| 321 | # Call the function NAME with arguments NAME1, NAME2 etc.
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| 322 | m4_define([b4_c_function_call],
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| 323 | [$1 (b4_c_args(m4_shift2($@)))[]dnl
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| 324 | ])
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| 325 |
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| 326 |
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| 327 | # b4_c_args([DECL1, NAME1], ...)
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| 328 | # ------------------------------
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| 329 | # Output the arguments NAME1, NAME2...
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| 330 | m4_define([b4_c_args],
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| 331 | [m4_map_sep([b4_c_arg], [, ], [$@])])
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| 332 |
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| 333 | m4_define([b4_c_arg],
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| 334 | [$2])
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| 335 |
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| 336 |
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| 337 | ## ----------- ##
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| 338 | ## Synclines. ##
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| 339 | ## ----------- ##
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| 340 |
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| 341 | # b4_sync_start(LINE, FILE)
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| 342 | # -----------------------
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| 343 | m4_define([b4_sync_start], [[#]line $1 $2])
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| 344 |
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| 345 |
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| 346 | ## -------------- ##
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| 347 | ## User actions. ##
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| 348 | ## -------------- ##
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| 349 |
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| 350 | # b4_case(LABEL, STATEMENTS)
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| 351 | # --------------------------
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| 352 | m4_define([b4_case],
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| 353 | [ case $1:
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| 354 | $2
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| 355 | break;])
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| 356 |
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| 357 | # b4_symbol_actions(FILENAME, LINENO,
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| 358 | # SYMBOL-TAG, SYMBOL-NUM,
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| 359 | # SYMBOL-ACTION, SYMBOL-TYPENAME)
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| 360 | # -------------------------------------------------
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| 361 | m4_define([b4_symbol_actions],
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| 362 | [m4_pushdef([b4_dollar_dollar],
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| 363 | [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
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| 364 | m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
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| 365 | case $4: /* $3 */
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| 366 | b4_syncline([$2], [$1])
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| 367 | $5;
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| 368 | b4_syncline([@oline@], [@ofile@])
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| 369 | break;
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| 370 | m4_popdef([b4_at_dollar])dnl
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| 371 | m4_popdef([b4_dollar_dollar])dnl
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| 372 | ])
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| 373 |
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| 374 |
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| 375 | # b4_yydestruct_generate(FUNCTION-DECLARATOR)
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| 376 | # -------------------------------------------
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| 377 | # Generate the "yydestruct" function, which declaration is issued using
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| 378 | # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
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| 379 | # or "b4_c_function_def" for K&R.
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| 380 | m4_define_default([b4_yydestruct_generate],
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| 381 | [[/*-----------------------------------------------.
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| 382 | | Release the memory associated to this symbol. |
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| 383 | `-----------------------------------------------*/
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| 384 |
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| 385 | /*ARGSUSED*/
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| 386 | ]$1([yydestruct],
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| 387 | [static void],
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| 388 | [[const char *yymsg], [yymsg]],
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| 389 | [[int yytype], [yytype]],
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| 390 | [[YYSTYPE *yyvaluep], [yyvaluep]][]dnl
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| 391 | b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
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| 392 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
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| 393 | {
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| 394 | YYUSE (yyvaluep);
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| 395 | ]b4_locations_if([ YYUSE (yylocationp);
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| 396 | ])dnl
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| 397 | b4_parse_param_use[]dnl
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| 398 | [
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| 399 | if (!yymsg)
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| 400 | yymsg = "Deleting";
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| 401 | YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
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| 402 |
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| 403 | switch (yytype)
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| 404 | {
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| 405 | ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
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| 406 | default:
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| 407 | break;
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| 408 | }
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| 409 | }]dnl
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| 410 | ])
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| 411 |
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| 412 |
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| 413 | # b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
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| 414 | # ------------------------------------------------
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| 415 | # Generate the "yy_symbol_print" function, which declaration is issued using
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| 416 | # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
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| 417 | # or "b4_c_function_def" for K&R.
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| 418 | m4_define_default([b4_yy_symbol_print_generate],
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| 419 | [[
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| 420 | /*--------------------------------.
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| 421 | | Print this symbol on YYOUTPUT. |
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| 422 | `--------------------------------*/
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| 423 |
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| 424 | /*ARGSUSED*/
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| 425 | ]$1([yy_symbol_value_print],
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| 426 | [static void],
|
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| 427 | [[FILE *yyoutput], [yyoutput]],
|
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| 428 | [[int yytype], [yytype]],
|
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| 429 | [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
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| 430 | b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
|
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| 431 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
|
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| 432 | {
|
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| 433 | if (!yyvaluep)
|
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| 434 | return;
|
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| 435 | ]b4_locations_if([ YYUSE (yylocationp);
|
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| 436 | ])dnl
|
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| 437 | b4_parse_param_use[]dnl
|
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| 438 | [# ifdef YYPRINT
|
---|
| 439 | if (yytype < YYNTOKENS)
|
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| 440 | YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
|
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| 441 | # else
|
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| 442 | YYUSE (yyoutput);
|
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| 443 | # endif
|
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| 444 | switch (yytype)
|
---|
| 445 | {
|
---|
| 446 | ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
|
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| 447 | [ default:
|
---|
| 448 | break;
|
---|
| 449 | }
|
---|
| 450 | }
|
---|
| 451 |
|
---|
| 452 |
|
---|
| 453 | /*--------------------------------.
|
---|
| 454 | | Print this symbol on YYOUTPUT. |
|
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| 455 | `--------------------------------*/
|
---|
| 456 |
|
---|
| 457 | ]$1([yy_symbol_print],
|
---|
| 458 | [static void],
|
---|
| 459 | [[FILE *yyoutput], [yyoutput]],
|
---|
| 460 | [[int yytype], [yytype]],
|
---|
| 461 | [[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
|
---|
| 462 | b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
|
---|
| 463 | m4_ifset([b4_parse_param], [, b4_parse_param]))[
|
---|
| 464 | {
|
---|
| 465 | if (yytype < YYNTOKENS)
|
---|
| 466 | YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
|
---|
| 467 | else
|
---|
| 468 | YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
|
---|
| 469 |
|
---|
| 470 | ]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
|
---|
| 471 | YYFPRINTF (yyoutput, ": ");
|
---|
| 472 | ])dnl
|
---|
| 473 | [ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
|
---|
| 474 | b4_locations_if([, yylocationp])[]b4_user_args[);
|
---|
| 475 | YYFPRINTF (yyoutput, ")");
|
---|
| 476 | }]dnl
|
---|
| 477 | ])
|
---|