data/c++.m4

   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 m4_define_default([b4_define_location_comparison],
  34                   m4_if(b4_filename_type, [std::string], [1], [0]))
  35
  36
  37 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
  38 # -----------------------------------------------------
  39 # Output the definition of the tokens as enums.
  40 m4_define([b4_token_enums],
  41 [/* Tokens.  */
  42    enum yytokentype {
  43 m4_map_sep([     b4_token_enum], [,
  44 ],
  45            [$@])
  46    };
  47 ])
  48
  49
  50 ## ----------------- ##
  51 ## Semantic Values.  ##
  52 ## ----------------- ##
  53
  54
  55 # b4_lhs_value([TYPE])
  56 # --------------------
  57 # Expansion of $<TYPE>$.
  58 m4_define([b4_lhs_value],
  59 [(yyval[]m4_ifval([$1], [.$1]))])
  60
  61
  62 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
  63 # --------------------------------------
  64 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
  65 # symbols on RHS.
  66 m4_define([b4_rhs_value],
  67 [(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))])
  68
  69 # b4_lhs_location()
  70 # -----------------
  71 # Expansion of @$.
  72 m4_define([b4_lhs_location],
  73 [(yyloc)])
  74
  75
  76 # b4_rhs_location(RULE-LENGTH, NUM)
  77 # ---------------------------------
  78 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
  79 # on RHS.
  80 m4_define([b4_rhs_location],
  81 [(yylocation_stack_@{($1) - ($2)@})])
  82
  83
  84 # b4_parse_param_decl
  85 # -------------------
  86 # Extra formal arguments of the constructor.
  87 # Change the parameter names from "foo" into "foo_yyarg", so that
  88 # there is no collision bw the user chosen attribute name, and the
  89 # argument name in the constructor.
  90 m4_define([b4_parse_param_decl],
  91 [m4_ifset([b4_parse_param],
  92           [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
  93
  94 m4_define([b4_parse_param_decl_1],
  95 [$1_yyarg])
  96
  97
  98
  99 # b4_parse_param_cons
 100 # -------------------
 101 # Extra initialisations of the constructor.
 102 m4_define([b4_parse_param_cons],
 103           [m4_ifset([b4_parse_param],
 104                     [
 105       b4_cc_constructor_calls(b4_parse_param)])])
 106 m4_define([b4_cc_constructor_calls],
 107           [m4_map_sep([b4_cc_constructor_call], [,
 108       ], [$@])])
 109 m4_define([b4_cc_constructor_call],
 110           [$2 ($2_yyarg)])
 111
 112 # b4_parse_param_vars
 113 # -------------------
 114 # Extra instance variables.
 115 m4_define([b4_parse_param_vars],
 116           [m4_ifset([b4_parse_param],
 117                     [
 118     /* User arguments.  */
 119 b4_cc_var_decls(b4_parse_param)])])
 120 m4_define([b4_cc_var_decls],
 121           [m4_map_sep([b4_cc_var_decl], [
 122 ], [$@])])
 123 m4_define([b4_cc_var_decl],
 124           [    $1;])