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   YYUSE (yyoutput);
  57 ]b4_parse_param_use[]dnl
  58 [
  59   yyparser.yysymprint_ (yytype, yyvaluep]b4_location_if([, yylocationp])[);
  60 }
  61 ]])
  62
  63 m4_prepend([b4_epilogue],
  64 [[
  65 /*------------------.
  66 | Report an error.  |
  67 `------------------*/
  68
  69 ]b4_c_ansi_function_def([yyerror],
  70     [static void],
  71     [[yy::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
  72     b4_parse_param,
  73     [[const char* msg], [msg]])[
  74 {
  75 ]b4_parse_param_use[]dnl
  76 [
  77   yyparser.error (*yylocationp, msg);
  78 }
  79
  80
  81 namespace yy
  82 {
  83 ]dnl Restore the actual parser params.
  84 m4_popdef([b4_parse_param])dnl
  85 [
  86   /// Build a parser object.
  87   ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
  88     : yycdebug_ (&std::cerr)]b4_parse_param_cons[
  89   {
  90   }
  91
  92   ]b4_parser_class_name::~b4_parser_class_name[ ()
  93   {
  94   }
  95
  96   int
  97   ]b4_parser_class_name[::parse ()
  98   {
  99     return ::yyparse (*this]b4_user_args[);
 100   }
 101
 102 #if YYDEBUG
 103
 104   /*--------------------------------.
 105   | Print this symbol on YYOUTPUT.  |
 106   `--------------------------------*/
 107
 108   void
 109   ]b4_parser_class_name[::yysymprint_ (int yytype,
 110                            const semantic_type* yyvaluep, const location_type* yylocationp)
 111   {
 112     /* Pacify ``unused variable'' warnings.  */
 113     YYUSE (yyvaluep);
 114     YYUSE (yylocationp);
 115     /* Backward compatibility, but should be removed eventually. */
 116     std::ostream& cdebug_ = *yycdebug_;
 117     YYUSE (cdebug_);
 118
 119     *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
 120                << ' ' << yytname[yytype] << " ("
 121                << *yylocationp << ": ";
 122     switch (yytype)
 123       {
 124   ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 125 [        default:
 126           break;
 127       }
 128     *yycdebug_ << ')';
 129   }
 130
 131   std::ostream&
 132   ]b4_parser_class_name[::debug_stream () const
 133   {
 134     return *yycdebug_;
 135   }
 136
 137   void
 138   ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
 139   {
 140     yycdebug_ = &o;
 141   }
 142
 143
 144   ]b4_parser_class_name[::debug_level_type
 145   ]b4_parser_class_name[::debug_level () const
 146   {
 147     return ::yydebug;
 148   }
 149
 150   void
 151   ]b4_parser_class_name[::set_debug_level (debug_level_type l)
 152   {
 153     ::yydebug = l;
 154   }
 155
 156 #endif /* ! YYDEBUG */
 157
 158 } // namespace yy
 159
 160 ]])
 161
 162 # Let glr.c believe that the user arguments are only the parser itself.
 163 m4_pushdef([b4_parse_param],
 164            [[yy::b4_parser_class_name& yyparser, yyparser],]
 165            m4_defn([b4_parse_param]))
 166 m4_include(b4_pkgdatadir/[glr.c])
 167 @output @output_header_name@
 168 b4_copyright([C++ Skeleton parser for GLALR(1) parsing with Bison],
 169              [2002, 2003, 2004, 2005])[
 170 #ifndef PARSER_HEADER_H
 171 # define PARSER_HEADER_H
 172
 173 #include <string>
 174 #include <iostream>
 175
 176 /* Using locations.  */
 177 #define YYLSP_NEEDED ]b4_locations_flag[
 178
 179 namespace yy
 180 {
 181   class position;
 182   class location;
 183 }
 184
 185 /* Copy the first part of user declarations.  */
 186 ]b4_pre_prologue[
 187
 188 ]/* Line __line__ of glr.cc.  */
 189 b4_syncline([@oline@], [@ofile@])[
 190
 191 #include "stack.hh"
 192 #include "location.hh"
 193
 194 /* Enabling traces.  */
 195 #ifndef YYDEBUG
 196 # define YYDEBUG ]b4_debug[
 197 #endif
 198
 199 /* Enabling verbose error messages.  */
 200 #ifdef YYERROR_VERBOSE
 201 # undef YYERROR_VERBOSE
 202 # define YYERROR_VERBOSE 1
 203 #else
 204 # define YYERROR_VERBOSE ]b4_error_verbose[
 205 #endif
 206
 207 /* Enabling the token table.  */
 208 #ifndef YYTOKEN_TABLE
 209 # define YYTOKEN_TABLE ]b4_token_table[
 210 #endif
 211
 212 #if 0
 213 /* Copy the second part of user declarations.  */
 214 ]b4_post_prologue[
 215
 216 ]/* Line __line__ of glr.cc.  */
 217
 218 b4_syncline([@oline@], [@ofile@])[
 219 #endif
 220
 221 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
 222    If N is 0, then set CURRENT to the empty location which ends
 223    the previous symbol: RHS[0] (always defined).  */
 224
 225 #ifndef YYLLOC_DEFAULT
 226 # define YYLLOC_DEFAULT(Current, Rhs, N)                                \
 227     do                                                                  \
 228       if (N)                                                            \
 229         {                                                               \
 230           (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
 231           (Current).end    = YYRHSLOC (Rhs, N).end;                     \
 232         }                                                               \
 233       else                                                              \
 234         {                                                               \
 235           (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
 236         }                                                               \
 237     while (/*CONSTCOND*/ 0)
 238 #endif
 239
 240 namespace yy
 241 {
 242   /// A Bison parser.
 243   class ]b4_parser_class_name[
 244   {
 245   public:
 246     /// Symbol semantic values.
 247 #if ! defined (YYSTYPE)
 248 ]m4_ifdef([b4_stype],
 249 [b4_syncline([b4_stype_line], [b4_file_name])
 250     union semantic_type b4_stype;
 251 /* Line __line__ of lalr1.cc.  */
 252 b4_syncline([@oline@], [@ofile@])],
 253 [    typedef int semantic_type;])[
 254 #else
 255     typedef YYSTYPE semantic_type;
 256 #endif
 257     /// Symbol locations.
 258     typedef ]b4_location_type[ location_type;
 259     /// Tokens.
 260     struct token
 261     {
 262       ]b4_token_enums(b4_tokens)[
 263     };
 264
 265     /// Build a parser object.
 266     ]b4_parser_class_name[ (]b4_parse_param_decl[);
 267     virtual ~]b4_parser_class_name[ ();
 268
 269     /// Parse.
 270     /// \returns  0 iff parsing succeeded.
 271     virtual int parse ();
 272
 273     /// The current debugging stream.
 274     std::ostream& debug_stream () const;
 275     /// Set the current debugging stream.
 276     void set_debug_stream (std::ostream &);
 277
 278     /// Type for debugging levels.
 279     typedef int debug_level_type;
 280     /// The current debugging level.
 281     debug_level_type debug_level () const;
 282     /// Set the current debugging level.
 283     void set_debug_level (debug_level_type l);
 284
 285   private:
 286
 287   public:
 288     /// Report a syntax error.
 289     /// \param loc    where the syntax error is found.
 290     /// \param msg    a description of the syntax error.
 291     virtual void error (const location_type& loc, const std::string& msg);
 292   private:
 293
 294 #if YYDEBUG
 295   public:
 296     /// \brief Report a symbol on the debug stream.
 297     /// \param yytype       The token type.
 298     /// \param yyvaluep     Its semantic value.
 299     /// \param yylocationp  Its location.
 300     virtual void yysymprint_ (int yytype,
 301                               const semantic_type* yyvaluep,
 302                               const location_type* yylocationp);
 303   private:
 304 #endif /* ! YYDEBUG */
 305
 306
 307     /// \brief Reclaim the memory associated to a symbol.
 308     /// \param yymsg        Why this token is reclaimed.
 309     /// \param yytype       The symbol type.
 310     /// \param yyvaluep     Its semantic value.
 311     /// \param yylocationp  Its location.
 312     inline void yydestruct_ (const char* yymsg,
 313                              int yytype,
 314                              semantic_type* yyvaluep,
 315                              location_type* yylocationp);
 316
 317     /* Debugging.  */
 318     std::ostream* yycdebug_;
 319 ]b4_parse_param_vars[
 320   };
 321
 322 ]dnl Redirections for glr.c.
 323 [#define YYSTYPE yy::]b4_parser_class_name[::semantic_type
 324 #define YYLTYPE yy::]b4_parser_class_name[::location_type
 325
 326 }
 327
 328 #endif /* ! defined PARSER_HEADER_H */]