1 m4_divert(-1) -*- Autoconf -*- 2 3 # C++ skeleton for Bison 4 5 # Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. 6 7 # This program is free software; you can redistribute it and/or modify 8 # it under the terms of the GNU General Public License as published by 9 # the Free Software Foundation; either version 2 of the License, or 10 # (at your option) any later version. 11 12 # This program is distributed in the hope that it will be useful, 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 # GNU General Public License for more details. 16 17 # You should have received a copy of the GNU General Public License 18 # along with this program; if not, write to the Free Software 19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 # 02110-1301 USA 21 22 m4_include(b4_pkgdatadir/[c.m4]) 23 24 ## ---------------- ## 25 ## Default values. ## 26 ## ---------------- ## 27 28 # Default parser class name. 29 m4_define_default([b4_parser_class_name], [parser]) 30 m4_define_default([b4_location_type], [location]) 31 m4_define_default([b4_filename_type], [std::string]) 32 m4_define_default([b4_namespace], m4_defn([b4_prefix])) 33 34 35 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) 36 # ----------------------------------------------------- 37 # Output the definition of the tokens as enums. 38 m4_define([b4_token_enums], 39 [/* Tokens. */ 40 enum yytokentype { 41 m4_map_sep([ b4_token_enum], [, 42 ], 43 [$@]) 44 }; 45 ]) 46 47 48 ## ----------------- ## 49 ## Semantic Values. ## 50 ## ----------------- ## 51 52 53 # b4_lhs_value([TYPE]) 54 # -------------------- 55 # Expansion of $<TYPE>$. 56 m4_define([b4_lhs_value], 57 [(yyval[]m4_ifval([$1], [.$1]))]) 58 59 60 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) 61 # -------------------------------------- 62 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH 63 # symbols on RHS. 64 m4_define([b4_rhs_value], 65 [(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))]) 66 67 # b4_lhs_location() 68 # ----------------- 69 # Expansion of @$. 70 m4_define([b4_lhs_location], 71 [(yyloc)]) 72 73 74 # b4_rhs_location(RULE-LENGTH, NUM) 75 # --------------------------------- 76 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols 77 # on RHS. 78 m4_define([b4_rhs_location], 79 [(yylocation_stack_@{($1) - ($2)@})]) 80 81 82 # b4_parse_param_decl 83 # ------------------- 84 # Extra formal arguments of the constructor. 85 # Change the parameter names from "foo" into "foo_yyarg", so that 86 # there is no collision bw the user chosen attribute name, and the 87 # argument name in the constructor. 88 m4_define([b4_parse_param_decl], 89 [m4_ifset([b4_parse_param], 90 [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])]) 91 92 m4_define([b4_parse_param_decl_1], 93 [$1_yyarg]) 94 95 96 97 # b4_parse_param_cons 98 # ------------------- 99 # Extra initialisations of the constructor. 100 m4_define([b4_parse_param_cons], 101 [m4_ifset([b4_parse_param], 102 [, 103 b4_cc_constructor_calls(b4_parse_param)])]) 104 m4_define([b4_cc_constructor_calls], 105 [m4_map_sep([b4_cc_constructor_call], [, 106 ], [$@])]) 107 m4_define([b4_cc_constructor_call], 108 [$2 ($2_yyarg)]) 109 110 # b4_parse_param_vars 111 # ------------------- 112 # Extra instance variables. 113 m4_define([b4_parse_param_vars], 114 [m4_ifset([b4_parse_param], 115 [ 116 /* User arguments. */ 117 b4_cc_var_decls(b4_parse_param)])]) 118 m4_define([b4_cc_var_decls], 119 [m4_map_sep([b4_cc_var_decl], [ 120 ], [$@])]) 121 m4_define([b4_cc_var_decl], 122 [ $1;]) 123
