data/c++.m4

   1 m4_divert(-1)                                               -*- Autoconf -*-
   2
   3 # C++ skeleton for Bison
   4
   5 # Copyright (C) 2002, 2003, 2004, 2005 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 ## ---------------- ##
  23 ## Default values.  ##
  24 ## ---------------- ##
  25
  26 # Default parser class name.
  27 m4_define_default([b4_parser_class_name], [parser])
  28 m4_define_default([b4_location_type], [location])
  29 m4_define_default([b4_filename_type], [std::string])
  30
  31
  32
  33 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
  34 # -----------------------------------------------------
  35 # Output the definition of the tokens (if there are) as enums.
  36 m4_define([b4_token_enums],
  37 [m4_if([$@], [[]], [],
  38 [/* Tokens.  */
  39    enum yytokentype {
  40 m4_map_sep([     b4_token_enum], [,
  41 ],
  42            [$@])
  43    };
  44 ])])
  45
  46
  47 ## ----------------- ##
  48 ## Semantic Values.  ##
  49 ## ----------------- ##
  50
  51
  52 # b4_lhs_value([TYPE])
  53 # --------------------
  54 # Expansion of $<TYPE>$.
  55 m4_define([b4_lhs_value],
  56 [(yyval[]m4_ifval([$1], [.$1]))])
  57
  58
  59 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
  60 # --------------------------------------
  61 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
  62 # symbols on RHS.
  63 m4_define([b4_rhs_value],
  64 [(yysemantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3]))])
  65
  66 # b4_lhs_location()
  67 # -----------------
  68 # Expansion of @$.
  69 m4_define([b4_lhs_location],
  70 [(yyloc)])
  71
  72
  73 # b4_rhs_location(RULE-LENGTH, NUM)
  74 # ---------------------------------
  75 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
  76 # on RHS.
  77 m4_define([b4_rhs_location],
  78 [(yylocation_stack_@{m4_eval([$1 - $2])@})])
  79
  80
  81 # b4_parse_param_decl
  82 # -------------------
  83 # Extra formal arguments of the constructor.
  84 # Change the parameter names from "foo" into "foo_yyarg", so that
  85 # there is no collision bw the user chosen attribute name, and the
  86 # argument name in the constructor.
  87 m4_define([b4_parse_param_decl],
  88 [m4_ifset([b4_parse_param],
  89           [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
  90
  91 m4_define([b4_parse_param_decl_1],
  92 [$1_yyarg])
  93
  94
  95
  96 # b4_parse_param_cons
  97 # -------------------
  98 # Extra initialisations of the constructor.
  99 m4_define([b4_parse_param_cons],
 100           [m4_ifset([b4_parse_param],
 101                     [,
 102       b4_cc_constructor_calls(b4_parse_param)])])
 103 m4_define([b4_cc_constructor_calls],
 104           [m4_map_sep([b4_cc_constructor_call], [,
 105       ], [$@])])
 106 m4_define([b4_cc_constructor_call],
 107           [$2 ($2_yyarg)])
 108
 109 # b4_parse_param_vars
 110 # -------------------
 111 # Extra instance variables.
 112 m4_define([b4_parse_param_vars],
 113           [m4_ifset([b4_parse_param],
 114                     [
 115     /* User arguments.  */
 116 b4_cc_var_decls(b4_parse_param)])])
 117 m4_define([b4_cc_var_decls],
 118           [m4_map_sep([b4_cc_var_decl], [
 119 ], [$@])])
 120 m4_define([b4_cc_var_decl],
 121           [    $1;])