data/glr.cc

   1 m4_divert(-1)                                                       -*- C -*-
   2
   3 # C++ GLR skeleton for Bison
   4 # Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   5
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 # 02110-1301  USA
  20
  21 # We require a pure interface using locations.
  22 m4_define([b4_location_flag], [1])
  23 m4_define([b4_pure],          [1])
  24
  25 m4_include(b4_pkgdatadir/[c++.m4])
  26 m4_include(b4_pkgdatadir/[location.cc])
  27
  28
  29 # b4_yy_symbol_print_generate
  30 # ---------------------------
  31 # Bypass the default implementation to generate the "yy_symbol_print"
  32 # and "yy_symbol_value_print" functions.
  33 m4_define([b4_yy_symbol_print_generate],
  34 [b4_c_ansi_function_decl([yyerror],
  35     [static void],
  36     [[yy::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
  37     b4_parse_param,
  38     [[const char* msg], [msg]])[
  39
  40 /*--------------------.
  41 | Print this symbol.  |
  42 `--------------------*/
  43
  44 ]b4_c_ansi_function_def([yy_symbol_print],
  45     [static void],
  46     [[FILE *],               []],
  47     [[int yytype],           [yytype]],
  48     [[const yy::b4_parser_class_name::semantic_type *yyvaluep],
  49                              [yyvaluep]][]dnl
  50 b4_location_if([,
  51     [[const yy::b4_parser_class_name::location_type *yylocationp],
  52                              [yylocationp]]])[]dnl
  53 m4_ifset([b4_parse_param], [, b4_parse_param]))[
  54 {
  55 ]b4_parse_param_use[]dnl
  56 [  yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_location_if([, yylocationp])[);
  57 }
  58 ]])
  59
  60 m4_prepend([b4_epilogue],
  61 [[
  62 /*------------------.
  63 | Report an error.  |
  64 `------------------*/
  65
  66 ]b4_c_ansi_function_def([yyerror],
  67     [static void],
  68     [[yy::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
  69     b4_parse_param,
  70     [[const char* msg], [msg]])[
  71 {
  72 ]b4_parse_param_use[]dnl
  73 [  yyparser.error (*yylocationp, msg);
  74 }
  75
  76
  77 namespace yy
  78 {
  79 ]dnl Restore the actual parser params.
  80 m4_popdef([b4_parse_param])dnl
  81 [
  82   /// Build a parser object.
  83   ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
  84     : yycdebug_ (&std::cerr)]b4_parse_param_cons[
  85   {
  86   }
  87
  88   ]b4_parser_class_name::~b4_parser_class_name[ ()
  89   {
  90   }
  91
  92   int
  93   ]b4_parser_class_name[::parse ()
  94   {
  95     return ::yyparse (*this]b4_user_args[);
  96   }
  97
  98 #if YYDEBUG
  99   /*--------------------.
 100   | Print this symbol.  |
 101   `--------------------*/
 102
 103   inline void
 104   ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
 105                            const semantic_type* yyvaluep, const location_type* yylocationp)
 106   {
 107     /* Pacify ``unused variable'' warnings.  */
 108     YYUSE (yyvaluep);
 109     YYUSE (yylocationp);
 110     switch (yytype)
 111       {
 112   ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 113 [        default:
 114           break;
 115       }
 116   }
 117
 118
 119   void
 120   ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
 121                            const semantic_type* yyvaluep, const location_type* yylocationp)
 122   {
 123     *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
 124                << ' ' << yytname[yytype] << " ("
 125                << *yylocationp << ": ";
 126     yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
 127     *yycdebug_ << ')';
 128   }
 129
 130   std::ostream&
 131   ]b4_parser_class_name[::debug_stream () const
 132   {
 133     return *yycdebug_;
 134   }
 135
 136   void
 137   ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
 138   {
 139     yycdebug_ = &o;
 140   }
 141
 142
 143   ]b4_parser_class_name[::debug_level_type
 144   ]b4_parser_class_name[::debug_level () const
 145   {
 146     return ::yydebug;
 147   }
 148
 149   void
 150   ]b4_parser_class_name[::set_debug_level (debug_level_type l)
 151   {
 152     ::yydebug = l;
 153   }
 154
 155 #endif /* ! YYDEBUG */
 156
 157 } // namespace yy
 158
 159 ]])
 160
 161 # Let glr.c believe that the user arguments are only the parser itself.
 162 m4_pushdef([b4_parse_param],
 163            [[yy::b4_parser_class_name& yyparser, yyparser],]
 164            m4_defn([b4_parse_param]))
 165 m4_include(b4_pkgdatadir/[glr.c])
 166 @output @output_header_name@
 167 b4_copyright([C++ Skeleton parser for GLALR(1) parsing with Bison],
 168              [2002, 2003, 2004, 2005])[
 169
 170 /* C++ GLR parser skeleton written by Akim Demaille.  */
 171
 172 #ifndef PARSER_HEADER_H
 173 # define PARSER_HEADER_H
 174
 175 #include <string>
 176 #include <iostream>
 177
 178 /* Using locations.  */
 179 #define YYLSP_NEEDED ]b4_locations_flag[
 180
 181 namespace yy
 182 {
 183   class position;
 184   class location;
 185 }
 186
 187 /* Copy the first part of user declarations.  */
 188 ]b4_pre_prologue[
 189
 190 ]/* Line __line__ of glr.cc.  */
 191 b4_syncline([@oline@], [@ofile@])[
 192
 193 #include "location.hh"
 194
 195 /* Enabling traces.  */
 196 #ifndef YYDEBUG
 197 # define YYDEBUG ]b4_debug[
 198 #endif
 199
 200 /* Enabling verbose error messages.  */
 201 #ifdef YYERROR_VERBOSE
 202 # undef YYERROR_VERBOSE
 203 # define YYERROR_VERBOSE 1
 204 #else
 205 # define YYERROR_VERBOSE ]b4_error_verbose[
 206 #endif
 207
 208 /* Enabling the token table.  */
 209 #ifndef YYTOKEN_TABLE
 210 # define YYTOKEN_TABLE ]b4_token_table[
 211 #endif
 212
 213 #if 0
 214 /* Copy the second part of user declarations.  */
 215 ]b4_post_prologue[
 216
 217 ]/* Line __line__ of glr.cc.  */
 218
 219 b4_syncline([@oline@], [@ofile@])[
 220 #endif
 221
 222 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
 223    If N is 0, then set CURRENT to the empty location which ends
 224    the previous symbol: RHS[0] (always defined).  */
 225
 226 #ifndef YYLLOC_DEFAULT
 227 # define YYLLOC_DEFAULT(Current, Rhs, N)                                \
 228     do                                                                  \
 229       if (N)                                                            \
 230         {                                                               \
 231           (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
 232           (Current).end    = YYRHSLOC (Rhs, N).end;                     \
 233         }                                                               \
 234       else                                                              \
 235         {                                                               \
 236           (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
 237         }                                                               \
 238     while (/*CONSTCOND*/ 0)
 239 #endif
 240
 241 namespace yy
 242 {
 243   /// A Bison parser.
 244   class ]b4_parser_class_name[
 245   {
 246   public:
 247     /// Symbol semantic values.
 248 #if ! defined (YYSTYPE)
 249 ]m4_ifdef([b4_stype],
 250 [b4_syncline([b4_stype_line], [b4_file_name])
 251     union semantic_type b4_stype;
 252 /* Line __line__ of lalr1.cc.  */
 253 b4_syncline([@oline@], [@ofile@])],
 254 [    typedef int semantic_type;])[
 255 #else
 256     typedef YYSTYPE semantic_type;
 257 #endif
 258     /// Symbol locations.
 259     typedef ]b4_location_type[ location_type;
 260     /// Tokens.
 261     struct token
 262     {
 263       ]b4_token_enums(b4_tokens)[
 264     };
 265
 266     /// Build a parser object.
 267     ]b4_parser_class_name[ (]b4_parse_param_decl[);
 268     virtual ~]b4_parser_class_name[ ();
 269
 270     /// Parse.
 271     /// \returns  0 iff parsing succeeded.
 272     virtual int parse ();
 273
 274     /// The current debugging stream.
 275     std::ostream& debug_stream () const;
 276     /// Set the current debugging stream.
 277     void set_debug_stream (std::ostream &);
 278
 279     /// Type for debugging levels.
 280     typedef int debug_level_type;
 281     /// The current debugging level.
 282     debug_level_type debug_level () const;
 283     /// Set the current debugging level.
 284     void set_debug_level (debug_level_type l);
 285
 286   private:
 287
 288   public:
 289     /// Report a syntax error.
 290     /// \param loc    where the syntax error is found.
 291     /// \param msg    a description of the syntax error.
 292     virtual void error (const location_type& loc, const std::string& msg);
 293   private:
 294
 295 #if YYDEBUG
 296   public:
 297     /// \brief Report a symbol value on the debug stream.
 298     /// \param yytype       The token type.
 299     /// \param yyvaluep     Its semantic value.
 300     /// \param yylocationp  Its location.
 301     virtual void yy_symbol_value_print_ (int yytype,
 302                                          const semantic_type* yyvaluep,
 303                                          const location_type* yylocationp);
 304     /// \brief Report a symbol on the debug stream.
 305     /// \param yytype       The token type.
 306     /// \param yyvaluep     Its semantic value.
 307     /// \param yylocationp  Its location.
 308     virtual void yy_symbol_print_ (int yytype,
 309                                    const semantic_type* yyvaluep,
 310                                    const location_type* yylocationp);
 311   private:
 312 #endif /* ! YYDEBUG */
 313
 314
 315     /// \brief Reclaim the memory associated to a symbol.
 316     /// \param yymsg        Why this token is reclaimed.
 317     /// \param yytype       The symbol type.
 318     /// \param yyvaluep     Its semantic value.
 319     /// \param yylocationp  Its location.
 320     inline void yydestruct_ (const char* yymsg,
 321                              int yytype,
 322                              semantic_type* yyvaluep,
 323                              location_type* yylocationp);
 324
 325     /* Debugging.  */
 326     std::ostream* yycdebug_;
 327 ]b4_parse_param_vars[
 328   };
 329
 330 ]dnl Redirections for glr.c.
 331 [#define YYSTYPE yy::]b4_parser_class_name[::semantic_type
 332 #define YYLTYPE yy::]b4_parser_class_name[::location_type
 333
 334 }
 335
 336 #endif /* ! defined PARSER_HEADER_H */]