data/location.cc

   1 # C++ skeleton for Bison
   2
   3 # Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18 # 02110-1301  USA
  19
  20 # We do want M4 expansion after # for CPP macros.
  21 m4_changecom()
  22 m4_divert_push(0)dnl
  23 @output(b4_dir_prefix[]position.hh@)
  24 b4_copyright([Positions for Bison parsers in C++],
  25   [2002, 2003, 2004, 2005, 2006])[
  26
  27 /**
  28  ** \file position.hh
  29  ** Define the ]b4_percent_define_get([[namespace]])[::position class.
  30  */
  31
  32 #ifndef BISON_POSITION_HH
  33 # define BISON_POSITION_HH
  34
  35 # include <iostream>
  36 # include <string>
  37 # include <algorithm>
  38
  39 namespace ]b4_percent_define_get([[namespace]])[
  40 {
  41   /// Abstract a position.
  42   class position
  43   {
  44   public:
  45 ]m4_ifdef([b4_location_constructors], [
  46     /// Construct a position.
  47     position ()
  48       : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
  49     {
  50     }
  51
  52 ])[
  53     /// Initialization.
  54     inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
  55     {
  56       filename = fn;
  57       line = ]b4_location_initial_line[;
  58       column = ]b4_location_initial_column[;
  59     }
  60
  61     /** \name Line and Column related manipulators
  62      ** \{ */
  63   public:
  64     /// (line related) Advance to the COUNT next lines.
  65     inline void lines (int count = 1)
  66     {
  67       column = ]b4_location_initial_column[;
  68       line += count;
  69     }
  70
  71     /// (column related) Advance to the COUNT next columns.
  72     inline void columns (int count = 1)
  73     {
  74       column = std::max (]b4_location_initial_column[u, column + count);
  75     }
  76     /** \} */
  77
  78   public:
  79     /// File name to which this position refers.
  80     ]b4_percent_define_get([[filename_type]])[* filename;
  81     /// Current line number.
  82     unsigned int line;
  83     /// Current column number.
  84     unsigned int column;
  85   };
  86
  87   /// Add and assign a position.
  88   inline const position&
  89   operator+= (position& res, const int width)
  90   {
  91     res.columns (width);
  92     return res;
  93   }
  94
  95   /// Add two position objects.
  96   inline const position
  97   operator+ (const position& begin, const int width)
  98   {
  99     position res = begin;
 100     return res += width;
 101   }
 102
 103   /// Add and assign a position.
 104   inline const position&
 105   operator-= (position& res, const int width)
 106   {
 107     return res += -width;
 108   }
 109
 110   /// Add two position objects.
 111   inline const position
 112   operator- (const position& begin, const int width)
 113   {
 114     return begin + -width;
 115   }
 116 ]m4_if(b4_percent_define_get([[define_location_comparison]]), [1], [[
 117   /// Compare two position objects.
 118   inline bool
 119   operator== (const position& pos1, const position& pos2)
 120   {
 121     return
 122       (pos1.filename == pos2.filename
 123        || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename)
 124       && pos1.line == pos2.line && pos1.column == pos2.column;
 125   }
 126
 127   /// Compare two position objects.
 128   inline bool
 129   operator!= (const position& pos1, const position& pos2)
 130   {
 131     return !(pos1 == pos2);
 132   }
 133 ]])[
 134   /** \brief Intercept output stream redirection.
 135    ** \param ostr the destination output stream
 136    ** \param pos a reference to the position to redirect
 137    */
 138   inline std::ostream&
 139   operator<< (std::ostream& ostr, const position& pos)
 140   {
 141     if (pos.filename)
 142       ostr << *pos.filename << ':';
 143     return ostr << pos.line << '.' << pos.column;
 144   }
 145
 146 }
 147 #endif // not BISON_POSITION_HH]
 148 @output(b4_dir_prefix[]location.hh@)
 149 b4_copyright([Locations for Bison parsers in C++],
 150   [2002, 2003, 2004, 2005, 2006])[
 151
 152 /**
 153  ** \file location.hh
 154  ** Define the ]b4_percent_define_get([[namespace]])[::location class.
 155  */
 156
 157 #ifndef BISON_LOCATION_HH
 158 # define BISON_LOCATION_HH
 159
 160 # include <iostream>
 161 # include <string>
 162 # include "position.hh"
 163
 164 namespace ]b4_percent_define_get([[namespace]])[
 165 {
 166
 167   /// Abstract a location.
 168   class location
 169   {
 170   public:
 171 ]m4_ifdef([b4_location_constructors], [
 172     /// Construct a location.
 173     location ()
 174       : begin (), end ()
 175     {
 176     }
 177
 178 ])[
 179     /// Initialization.
 180     inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
 181     {
 182       begin.initialize (fn);
 183       end = begin;
 184     }
 185
 186     /** \name Line and Column related manipulators
 187      ** \{ */
 188   public:
 189     /// Reset initial location to final location.
 190     inline void step ()
 191     {
 192       begin = end;
 193     }
 194
 195     /// Extend the current location to the COUNT next columns.
 196     inline void columns (unsigned int count = 1)
 197     {
 198       end += count;
 199     }
 200
 201     /// Extend the current location to the COUNT next lines.
 202     inline void lines (unsigned int count = 1)
 203     {
 204       end.lines (count);
 205     }
 206     /** \} */
 207
 208
 209   public:
 210     /// Beginning of the located region.
 211     position begin;
 212     /// End of the located region.
 213     position end;
 214   };
 215
 216   /// Join two location objects to create a location.
 217   inline const location operator+ (const location& begin, const location& end)
 218   {
 219     location res = begin;
 220     res.end = end.end;
 221     return res;
 222   }
 223
 224   /// Add two location objects.
 225   inline const location operator+ (const location& begin, unsigned int width)
 226   {
 227     location res = begin;
 228     res.columns (width);
 229     return res;
 230   }
 231
 232   /// Add and assign a location.
 233   inline location& operator+= (location& res, unsigned int width)
 234   {
 235     res.columns (width);
 236     return res;
 237   }
 238 ]m4_if(b4_percent_define_get([[define_location_comparison]]), [1], [[
 239   /// Compare two location objects.
 240   inline bool
 241   operator== (const location& loc1, const location& loc2)
 242   {
 243     return loc1.begin == loc2.begin && loc1.end == loc2.end;
 244   }
 245
 246   /// Compare two location objects.
 247   inline bool
 248   operator!= (const location& loc1, const location& loc2)
 249   {
 250     return !(loc1 == loc2);
 251   }
 252 ]])[
 253   /** \brief Intercept output stream redirection.
 254    ** \param ostr the destination output stream
 255    ** \param loc a reference to the location to redirect
 256    **
 257    ** Avoid duplicate information.
 258    */
 259   inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
 260   {
 261     position last = loc.end - 1;
 262     ostr << loc.begin;
 263     if (last.filename
 264         && (!loc.begin.filename
 265             || *loc.begin.filename != *last.filename))
 266       ostr << '-' << last;
 267     else if (loc.begin.line != last.line)
 268       ostr << '-' << last.line  << '.' << last.column;
 269     else if (loc.begin.column != last.column)
 270       ostr << '-' << last.column;
 271     return ostr;
 272   }
 273
 274 }
 275
 276 #endif // not BISON_LOCATION_HH]
 277 m4_divert_pop(0)
 278 m4_changecom([#])