data/location.cc

   1 m4_divert(-1)
   2
   3 # C++ skeleton for Bison
   4
   5 # Copyright (C) 2002, 2003, 2004, 2005, 2006 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 # We do want M4 expansion after # for CPP macros.
  23 m4_changecom()
  24 m4_divert(0)dnl
  25 @output b4_dir_prefix[]position.hh
  26 b4_copyright([Positions for Bison parsers in C++],
  27   [2002, 2003, 2004, 2005, 2006])[
  28
  29 /**
  30  ** \file position.hh
  31  ** Define the ]b4_namespace[::position class.
  32  */
  33
  34 #ifndef BISON_POSITION_HH
  35 # define BISON_POSITION_HH
  36
  37 # include <iostream>
  38 # include <string>
  39 # include <algorithm>
  40
  41 namespace ]b4_namespace[
  42 {
  43   /// Abstract a position.
  44   class position
  45   {
  46   public:
  47 ]m4_ifdef([b4_location_constructors], [
  48     /// Construct a position.
  49     position ()
  50       : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
  51     {
  52     }
  53
  54 ])[
  55     /// Initialization.
  56     inline void initialize (]b4_filename_type[* fn)
  57     {
  58       filename = fn;
  59       line = ]b4_location_initial_line[;
  60       column = ]b4_location_initial_column[;
  61     }
  62
  63     /** \name Line and Column related manipulators
  64      ** \{ */
  65   public:
  66     /// (line related) Advance to the COUNT next lines.
  67     inline void lines (int count = 1)
  68     {
  69       column = ]b4_location_initial_column[;
  70       line += count;
  71     }
  72
  73     /// (column related) Advance to the COUNT next columns.
  74     inline void columns (int count = 1)
  75     {
  76       column = std::max (]b4_location_initial_column[u, column + count);
  77     }
  78     /** \} */
  79
  80   public:
  81     /// File name to which this position refers.
  82     ]b4_filename_type[* filename;
  83     /// Current line number.
  84     unsigned int line;
  85     /// Current column number.
  86     unsigned int column;
  87   };
  88
  89   /// Add and assign a position.
  90   inline const position&
  91   operator+= (position& res, const int width)
  92   {
  93     res.columns (width);
  94     return res;
  95   }
  96
  97   /// Add two position objects.
  98   inline const position
  99   operator+ (const position& begin, const int width)
 100   {
 101     position res = begin;
 102     return res += width;
 103   }
 104
 105   /// Add and assign a position.
 106   inline const position&
 107   operator-= (position& res, const int width)
 108   {
 109     return res += -width;
 110   }
 111
 112   /// Add two position objects.
 113   inline const position
 114   operator- (const position& begin, const int width)
 115   {
 116     return begin + -width;
 117   }
 118 ]m4_if(b4_define_location_comparison, [1], [[
 119   /// Compare two position objects.
 120   inline bool
 121   operator== (const position& pos1, const position& pos2)
 122   {
 123     return
 124       (pos1.filename == pos2.filename
 125        || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename)
 126       && pos1.line == pos2.line && pos1.column == pos2.column;
 127   }
 128
 129   /// Compare two position objects.
 130   inline bool
 131   operator!= (const position& pos1, const position& pos2)
 132   {
 133     return !(pos1 == pos2);
 134   }
 135 ]])[
 136   /** \brief Intercept output stream redirection.
 137    ** \param ostr the destination output stream
 138    ** \param pos a reference to the position to redirect
 139    */
 140   inline std::ostream&
 141   operator<< (std::ostream& ostr, const position& pos)
 142   {
 143     if (pos.filename)
 144       ostr << *pos.filename << ':';
 145     return ostr << pos.line << '.' << pos.column;
 146   }
 147
 148 }
 149 #endif // not BISON_POSITION_HH]
 150 @output b4_dir_prefix[]location.hh
 151 b4_copyright([Locations for Bison parsers in C++],
 152   [2002, 2003, 2004, 2005, 2006])[
 153
 154 /**
 155  ** \file location.hh
 156  ** Define the ]b4_namespace[::location class.
 157  */
 158
 159 #ifndef BISON_LOCATION_HH
 160 # define BISON_LOCATION_HH
 161
 162 # include <iostream>
 163 # include <string>
 164 # include "position.hh"
 165
 166 namespace ]b4_namespace[
 167 {
 168
 169   /// Abstract a location.
 170   class location
 171   {
 172   public:
 173 ]m4_ifdef([b4_location_constructors], [
 174     /// Construct a location.
 175     location ()
 176       : begin (), end ()
 177     {
 178     }
 179
 180 ])[
 181     /// Initialization.
 182     inline void initialize (]b4_filename_type[* fn)
 183     {
 184       begin.initialize (fn);
 185       end = begin;
 186     }
 187
 188     /** \name Line and Column related manipulators
 189      ** \{ */
 190   public:
 191     /// Reset initial location to final location.
 192     inline void step ()
 193     {
 194       begin = end;
 195     }
 196
 197     /// Extend the current location to the COUNT next columns.
 198     inline void columns (unsigned int count = 1)
 199     {
 200       end += count;
 201     }
 202
 203     /// Extend the current location to the COUNT next lines.
 204     inline void lines (unsigned int count = 1)
 205     {
 206       end.lines (count);
 207     }
 208     /** \} */
 209
 210
 211   public:
 212     /// Beginning of the located region.
 213     position begin;
 214     /// End of the located region.
 215     position end;
 216   };
 217
 218   /// Join two location objects to create a location.
 219   inline const location operator+ (const location& begin, const location& end)
 220   {
 221     location res = begin;
 222     res.end = end.end;
 223     return res;
 224   }
 225
 226   /// Add two location objects.
 227   inline const location operator+ (const location& begin, unsigned int width)
 228   {
 229     location res = begin;
 230     res.columns (width);
 231     return res;
 232   }
 233
 234   /// Add and assign a location.
 235   inline location& operator+= (location& res, unsigned int width)
 236   {
 237     res.columns (width);
 238     return res;
 239   }
 240 ]m4_if(b4_define_location_comparison, [1], [[
 241   /// Compare two location objects.
 242   inline bool
 243   operator== (const location& loc1, const location& loc2)
 244   {
 245     return loc1.begin == loc2.begin && loc1.end == loc2.end;
 246   }
 247
 248   /// Compare two location objects.
 249   inline bool
 250   operator!= (const location& loc1, const location& loc2)
 251   {
 252     return !(loc1 == loc2);
 253   }
 254 ]])[
 255   /** \brief Intercept output stream redirection.
 256    ** \param ostr the destination output stream
 257    ** \param loc a reference to the location to redirect
 258    **
 259    ** Avoid duplicate information.
 260    */
 261   inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
 262   {
 263     position last = loc.end - 1;
 264     ostr << loc.begin;
 265     if (last.filename
 266         && (!loc.begin.filename
 267             || *loc.begin.filename != *last.filename))
 268       ostr << '-' << last;
 269     else if (loc.begin.line != last.line)
 270       ostr << '-' << last.line  << '.' << last.column;
 271     else if (loc.begin.column != last.column)
 272       ostr << '-' << last.column;
 273     return ostr;
 274   }
 275
 276 }
 277
 278 #endif // not BISON_LOCATION_HH]
 279 m4_divert(-1)
 280 m4_changecom([#])