data/c++.m4

   1                                                             -*- Autoconf -*-
   2
   3 # C++ skeleton for Bison
   4
   5 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
   6 # Inc.
   7
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21 # 02110-1301  USA
  22
  23 m4_include(b4_pkgdatadir/[c.m4])
  24
  25 ## ---------------- ##
  26 ## Default values.  ##
  27 ## ---------------- ##
  28
  29 # Default parser class name.
  30 b4_percent_define_default([[parser_class_name]], [[parser]])
  31 b4_percent_define_default([[location_type]], [[location]])
  32 b4_percent_define_default([[filename_type]], [[std::string]])
  33 b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
  34 b4_percent_define_default([[global_tokens_and_yystype]], [[false]])
  35 b4_percent_define_default([[define_location_comparison]],
  36                           [m4_if(b4_percent_define_get([[filename_type]]),
  37                                  [std::string], [[true]], [[false]])])
  38
  39
  40 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
  41 # -----------------------------------------------------
  42 # Output the definition of the tokens as enums.
  43 m4_define([b4_token_enums],
  44 [/* Tokens.  */
  45    enum yytokentype {
  46 m4_map_sep([     b4_token_enum], [,
  47 ],
  48            [$@])
  49    };
  50 ])
  51
  52
  53 ## ----------------- ##
  54 ## Semantic Values.  ##
  55 ## ----------------- ##
  56
  57
  58 # b4_lhs_value([TYPE])
  59 # --------------------
  60 # Expansion of $<TYPE>$.
  61 m4_define([b4_lhs_value],
  62 [(yyval[]m4_ifval([$1], [.$1]))])
  63
  64
  65 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
  66 # --------------------------------------
  67 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
  68 # symbols on RHS.
  69 m4_define([b4_rhs_value],
  70 [(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))])
  71
  72 # b4_lhs_location()
  73 # -----------------
  74 # Expansion of @$.
  75 m4_define([b4_lhs_location],
  76 [(yyloc)])
  77
  78
  79 # b4_rhs_location(RULE-LENGTH, NUM)
  80 # ---------------------------------
  81 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
  82 # on RHS.
  83 m4_define([b4_rhs_location],
  84 [(yylocation_stack_@{($1) - ($2)@})])
  85
  86
  87 # b4_parse_param_decl
  88 # -------------------
  89 # Extra formal arguments of the constructor.
  90 # Change the parameter names from "foo" into "foo_yyarg", so that
  91 # there is no collision bw the user chosen attribute name, and the
  92 # argument name in the constructor.
  93 m4_define([b4_parse_param_decl],
  94 [m4_ifset([b4_parse_param],
  95           [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
  96
  97 m4_define([b4_parse_param_decl_1],
  98 [$1_yyarg])
  99
 100
 101
 102 # b4_parse_param_cons
 103 # -------------------
 104 # Extra initialisations of the constructor.
 105 m4_define([b4_parse_param_cons],
 106           [m4_ifset([b4_parse_param],
 107                     [
 108       b4_cc_constructor_calls(b4_parse_param)])])
 109 m4_define([b4_cc_constructor_calls],
 110           [m4_map_sep([b4_cc_constructor_call], [,
 111       ], [$@])])
 112 m4_define([b4_cc_constructor_call],
 113           [$2 ($2_yyarg)])
 114
 115 # b4_parse_param_vars
 116 # -------------------
 117 # Extra instance variables.
 118 m4_define([b4_parse_param_vars],
 119           [m4_ifset([b4_parse_param],
 120                     [
 121     /* User arguments.  */
 122 b4_cc_var_decls(b4_parse_param)])])
 123 m4_define([b4_cc_var_decls],
 124           [m4_map_sep([b4_cc_var_decl], [
 125 ], [$@])])
 126 m4_define([b4_cc_var_decl],
 127           [    $1;])