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
  40 namespace ]b4_namespace[
  41 {
  42   /// Abstract a position.
  43   class position
  44   {
  45   public:
  46 ]m4_ifdef([b4_location_constructors], [
  47     /// Construct a position.
  48     position ()
  49       : filename (0), line (1), column (0)
  50     {
  51     }
  52
  53 ])[
  54     /// Initialization.
  55     inline void initialize (]b4_filename_type[* fn)
  56     {
  57       filename = fn;
  58       line = 1;
  59       column = 0;
  60     }
  61
  62     /** \name Line and Column related manipulators
  63      ** \{ */
  64   public:
  65     /// (line related) Advance to the COUNT next lines.
  66     inline void lines (int count = 1)
  67     {
  68       column = 0;
  69       line += count;
  70     }
  71
  72     /// (column related) Advance to the COUNT next columns.
  73     inline void columns (int count = 1)
  74     {
  75       int leftmost = 0;
  76       int current  = column;
  77       if (leftmost <= current + count)
  78         column += count;
  79       else
  80         column = 0;
  81     }
  82     /** \} */
  83
  84   public:
  85     /// File name to which this position refers.
  86     ]b4_filename_type[* filename;
  87     /// Current line number.
  88     unsigned int line;
  89     /// Current column number.
  90     unsigned int column;
  91   };
  92
  93   /// Add and assign a position.
  94   inline const position&
  95   operator+= (position& res, const int width)
  96   {
  97     res.columns (width);
  98     return res;
  99   }
 100
 101   /// Add two position objects.
 102   inline const position
 103   operator+ (const position& begin, const int width)
 104   {
 105     position res = begin;
 106     return res += width;
 107   }
 108
 109   /// Add and assign a position.
 110   inline const position&
 111   operator-= (position& res, const int width)
 112   {
 113     return res += -width;
 114   }
 115
 116   /// Add two position objects.
 117   inline const position
 118   operator- (const position& begin, const int width)
 119   {
 120     return begin + -width;
 121   }
 122 ]m4_if(b4_define_location_comparison, [1], [[
 123   /// Compare two position objects.
 124   inline bool
 125   operator== (const position& pos1, const position& pos2)
 126   {
 127     return
 128       (pos1.filename == pos2.filename
 129        || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename)
 130       && pos1.line == pos2.line && pos1.column == pos2.column;
 131   }
 132
 133   /// Compare two position objects.
 134   inline bool
 135   operator!= (const position& pos1, const position& pos2)
 136   {
 137     return !(pos1 == pos2);
 138   }
 139 ]])[
 140   /** \brief Intercept output stream redirection.
 141    ** \param ostr the destination output stream
 142    ** \param pos a reference to the position to redirect
 143    */
 144   inline std::ostream&
 145   operator<< (std::ostream& ostr, const position& pos)
 146   {
 147     if (pos.filename)
 148       ostr << *pos.filename << ':';
 149     return ostr << pos.line << '.' << pos.column;
 150   }
 151
 152 }
 153 #endif // not BISON_POSITION_HH]
 154 @output b4_dir_prefix[]location.hh
 155 b4_copyright([Locations for Bison parsers in C++],
 156   [2002, 2003, 2004, 2005, 2006])[
 157
 158 /**
 159  ** \file location.hh
 160  ** Define the ]b4_namespace[::location class.
 161  */
 162
 163 #ifndef BISON_LOCATION_HH
 164 # define BISON_LOCATION_HH
 165
 166 # include <iostream>
 167 # include <string>
 168 # include "position.hh"
 169
 170 namespace ]b4_namespace[
 171 {
 172
 173   /// Abstract a location.
 174   class location
 175   {
 176   public:
 177 ]m4_ifdef([b4_location_constructors], [
 178     /// Construct a location.
 179     location ()
 180       : begin (), end ()
 181     {
 182     }
 183
 184 ])[
 185     /// Initialization.
 186     inline void initialize (]b4_filename_type[* fn)
 187     {
 188       begin.initialize (fn);
 189       end = begin;
 190     }
 191
 192     /** \name Line and Column related manipulators
 193      ** \{ */
 194   public:
 195     /// Reset initial location to final location.
 196     inline void step ()
 197     {
 198       begin = end;
 199     }
 200
 201     /// Extend the current location to the COUNT next columns.
 202     inline void columns (unsigned int count = 1)
 203     {
 204       end += count;
 205     }
 206
 207     /// Extend the current location to the COUNT next lines.
 208     inline void lines (unsigned int count = 1)
 209     {
 210       end.lines (count);
 211     }
 212     /** \} */
 213
 214
 215   public:
 216     /// Beginning of the located region.
 217     position begin;
 218     /// End of the located region.
 219     position end;
 220   };
 221
 222   /// Join two location objects to create a location.
 223   inline const location operator+ (const location& begin, const location& end)
 224   {
 225     location res = begin;
 226     res.end = end.end;
 227     return res;
 228   }
 229
 230   /// Add two location objects.
 231   inline const location operator+ (const location& begin, unsigned int width)
 232   {
 233     location res = begin;
 234     res.columns (width);
 235     return res;
 236   }
 237
 238   /// Add and assign a location.
 239   inline location& operator+= (location& res, unsigned int width)
 240   {
 241     res.columns (width);
 242     return res;
 243   }
 244 ]m4_if(b4_define_location_comparison, [1], [[
 245   /// Compare two location objects.
 246   inline bool
 247   operator== (const location& loc1, const location& loc2)
 248   {
 249     return loc1.begin == loc2.begin && loc1.end == loc2.end;
 250   }
 251
 252   /// Compare two location objects.
 253   inline bool
 254   operator!= (const location& loc1, const location& loc2)
 255   {
 256     return !(loc1 == loc2);
 257   }
 258 ]])[
 259   /** \brief Intercept output stream redirection.
 260    ** \param ostr the destination output stream
 261    ** \param loc a reference to the location to redirect
 262    **
 263    ** Avoid duplicate information.
 264    */
 265   inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
 266   {
 267     position last = loc.end - 1;
 268     ostr << loc.begin;
 269     if (last.filename
 270         && (!loc.begin.filename
 271             || *loc.begin.filename != *last.filename))
 272       ostr << '-' << last;
 273     else if (loc.begin.line != last.line)
 274       ostr << '-' << last.line  << '.' << last.column;
 275     else if (loc.begin.column != last.column)
 276       ostr << '-' << last.column;
 277     return ostr;
 278   }
 279
 280 }
 281
 282 #endif // not BISON_LOCATION_HH]
 283 m4_divert(-1)
 284 m4_changecom([#])