data/glr.cc

   1 m4_divert(-1)                                                       -*- C -*-
   2
   3 # C++ GLR skeleton for Bison
   4 # Copyright (C) 2002, 2003, 2004, 2005 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_yysymprint_generate(FUNCTION-DECLARATOR)
  30 # -------------------------------------------
  31 # Generate the "yysymprint" function, which declaration is issued using
  32 # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
  33 # or "b4_c_function_def" for K&R.
  34 m4_define([b4_yysymprint_generate],
  35 [b4_c_ansi_function_decl([yyerror],
  36     [static void],
  37     [[yy::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
  38     b4_parse_param,
  39     [[const char* msg], [msg]])[
  40
  41 /*--------------------------------.
  42 | Print this symbol on YYOUTPUT.  |
  43 `--------------------------------*/
  44
  45 ]$1([yysymprint],
  46     [static void],
  47     [[FILE *yyoutput],       [yyoutput]],
  48     [[int yytype],           [yytype]],
  49     [[const yy::b4_parser_class_name::semantic_type *yyvaluep],
  50                              [yyvaluep]][]dnl
  51 b4_location_if([,
  52     [[const yy::b4_parser_class_name::location_type *yylocationp],
  53                              [yylocationp]]])[]dnl
  54 m4_ifset([b4_parse_param], [, b4_parse_param]))[
  55 {
  56   (void) yyoutput;
  57   yyparser.yysymprint_ (yytype, yyvaluep]b4_location_if([, yylocationp])[);
  58 }
  59 ]])
  60
  61 m4_prepend([b4_epilogue],
  62 [[
  63 /*------------------.
  64 | Report an error.  |
  65 `------------------*/
  66
  67 ]b4_c_ansi_function_def([yyerror],
  68     [static void],
  69     [[yy::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
  70     b4_parse_param,
  71     [[const char* msg], [msg]])[
  72 {
  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   /*--------------------------------.
 101   | Print this symbol on YYOUTPUT.  |
 102   `--------------------------------*/
 103
 104   void
 105   ]b4_parser_class_name[::yysymprint_ (int yytype,
 106                            const semantic_type* yyvaluep, const location_type* yylocationp)
 107   {
 108     /* Pacify ``unused variable'' warnings.  */
 109     (void) yyvaluep;
 110     (void) yylocationp;
 111     /* Backward compatibility, but should be removed eventually. */
 112     std::ostream& cdebug_ = *yycdebug_;
 113     (void) cdebug_;
 114
 115     *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
 116                << ' ' << yytname[yytype] << " ("
 117                << *yylocationp << ": ";
 118     switch (yytype)
 119       {
 120   ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 121 [        default:
 122           break;
 123       }
 124     *yycdebug_ << ')';
 125   }
 126
 127   std::ostream&
 128   ]b4_parser_class_name[::debug_stream () const
 129   {
 130     return *yycdebug_;
 131   }
 132
 133   void
 134   ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
 135   {
 136     yycdebug_ = &o;
 137   }
 138
 139
 140   ]b4_parser_class_name[::debug_level_type
 141   ]b4_parser_class_name[::debug_level () const
 142   {
 143     return ::yydebug;
 144   }
 145
 146   void
 147   ]b4_parser_class_name[::set_debug_level (debug_level_type l)
 148   {
 149     ::yydebug = l;
 150   }
 151
 152 #endif /* ! YYDEBUG */
 153
 154 } // namespace yy
 155
 156 ]])
 157
 158 # Let glr.c believe that the user arguments are only the parser itself.
 159 m4_pushdef([b4_parse_param],
 160            [[yy::b4_parser_class_name& yyparser, yyparser],]
 161            m4_defn([b4_parse_param]))
 162 m4_include(b4_pkgdatadir/[glr.c])
 163 @output @output_header_name@
 164 b4_copyright([C++ Skeleton parser for GLALR(1) parsing with Bison],
 165              [2002, 2003, 2004, 2005])[
 166 #ifndef PARSER_HEADER_H
 167 # define PARSER_HEADER_H
 168
 169 #include <string>
 170 #include <iostream>
 171
 172 /* Using locations.  */
 173 #define YYLSP_NEEDED ]b4_locations_flag[
 174
 175 namespace yy
 176 {
 177   class position;
 178   class location;
 179 }
 180
 181 /* Copy the first part of user declarations.  */
 182 ]b4_pre_prologue[
 183
 184 ]/* Line __line__ of glr.cc.  */
 185 b4_syncline([@oline@], [@ofile@])[
 186
 187 #include "stack.hh"
 188 #include "location.hh"
 189
 190 /* Enabling traces.  */
 191 #ifndef YYDEBUG
 192 # define YYDEBUG ]b4_debug[
 193 #endif
 194
 195 /* Enabling verbose error messages.  */
 196 #ifdef YYERROR_VERBOSE
 197 # undef YYERROR_VERBOSE
 198 # define YYERROR_VERBOSE 1
 199 #else
 200 # define YYERROR_VERBOSE ]b4_error_verbose[
 201 #endif
 202
 203 /* Enabling the token table.  */
 204 #ifndef YYTOKEN_TABLE
 205 # define YYTOKEN_TABLE ]b4_token_table[
 206 #endif
 207
 208 #if 0
 209 /* Copy the second part of user declarations.  */
 210 ]b4_post_prologue[
 211
 212 ]/* Line __line__ of glr.cc.  */
 213
 214 b4_syncline([@oline@], [@ofile@])[
 215 #endif
 216
 217 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
 218    If N is 0, then set CURRENT to the empty location which ends
 219    the previous symbol: RHS[0] (always defined).  */
 220
 221 #ifndef YYLLOC_DEFAULT
 222 # define YYLLOC_DEFAULT(Current, Rhs, N)                                \
 223     do                                                                  \
 224       if (N)                                                            \
 225         {                                                               \
 226           (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
 227           (Current).end    = YYRHSLOC (Rhs, N).end;                     \
 228         }                                                               \
 229       else                                                              \
 230         {                                                               \
 231           (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
 232         }                                                               \
 233     while (/*CONSTCOND*/ 0)
 234 #endif
 235
 236 namespace yy
 237 {
 238   /// A Bison parser.
 239   class ]b4_parser_class_name[
 240   {
 241   public:
 242     /// Symbol semantic values.
 243 #if ! defined (YYSTYPE)
 244 ]m4_ifdef([b4_stype],
 245 [b4_syncline([b4_stype_line], [b4_file_name])
 246     union semantic_type b4_stype;
 247 /* Line __line__ of lalr1.cc.  */
 248 b4_syncline([@oline@], [@ofile@])],
 249 [    typedef int semantic_type;])[
 250 #else
 251     typedef YYSTYPE semantic_type;
 252 #endif
 253     /// Symbol locations.
 254     typedef ]b4_location_type[ location_type;
 255     /// Tokens.
 256     struct token
 257     {
 258       ]b4_token_enums(b4_tokens)[
 259     };
 260
 261     /// Build a parser object.
 262     ]b4_parser_class_name[ (]b4_parse_param_decl[);
 263     virtual ~]b4_parser_class_name[ ();
 264
 265     /// Parse.
 266     /// \returns  0 iff parsing succeeded.
 267     virtual int parse ();
 268
 269     /// The current debugging stream.
 270     std::ostream& debug_stream () const;
 271     /// Set the current debugging stream.
 272     void set_debug_stream (std::ostream &);
 273
 274     /// Type for debugging levels.
 275     typedef int debug_level_type;
 276     /// The current debugging level.
 277     debug_level_type debug_level () const;
 278     /// Set the current debugging level.
 279     void set_debug_level (debug_level_type l);
 280
 281   private:
 282
 283   public:
 284     /// Report a syntax error.
 285     /// \param loc    where the syntax error is found.
 286     /// \param msg    a description of the syntax error.
 287     virtual void error (const location_type& loc, const std::string& msg);
 288   private:
 289
 290 #if YYDEBUG
 291   public:
 292     /// \brief Report a symbol on the debug stream.
 293     /// \param yytype       The token type.
 294     /// \param yyvaluep     Its semantic value.
 295     /// \param yylocationp  Its location.
 296     virtual void yysymprint_ (int yytype,
 297                               const semantic_type* yyvaluep,
 298                               const location_type* yylocationp);
 299   private:
 300 #endif /* ! YYDEBUG */
 301
 302
 303     /// \brief Reclaim the memory associated to a symbol.
 304     /// \param yymsg        Why this token is reclaimed.
 305     /// \param yytype       The symbol type.
 306     /// \param yyvaluep     Its semantic value.
 307     /// \param yylocationp  Its location.
 308     inline void yydestruct_ (const char* yymsg,
 309                              int yytype,
 310                              semantic_type* yyvaluep,
 311                              location_type* yylocationp);
 312
 313     /* Debugging.  */
 314     std::ostream* yycdebug_;
 315 ]b4_parse_param_vars[
 316   };
 317
 318 ]dnl Redirections for glr.c.
 319 [#define YYSTYPE yy::]b4_parser_class_name[::semantic_type
 320 #define YYLTYPE yy::]b4_parser_class_name[::location_type
 321
 322 }
 323
 324 #endif /* ! defined PARSER_HEADER_H */]