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([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
  27
  28 /**
  29  ** \file position.hh
  30  ** Define the yy::position class.
  31  */
  32
  33 #ifndef BISON_POSITION_HH
  34 # define BISON_POSITION_HH
  35
  36 # include <iostream>
  37 # include <string>
  38
  39 namespace yy
  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 (1), column (0)
  49     {
  50     }
  51
  52 ])[
  53     /// Initialization.
  54     inline void initialize (]b4_filename_type[* fn)
  55     {
  56       filename = fn;
  57       line = 1;
  58       column = 0;
  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 = 0;
  68       line += count;
  69     }
  70
  71     /// (column related) Advance to the COUNT next columns.
  72     inline void columns (int count = 1)
  73     {
  74       int leftmost = 0;
  75       int current  = column;
  76       if (leftmost <= current + count)
  77         column += count;
  78       else
  79         column = 0;
  80     }
  81     /** \} */
  82
  83   public:
  84     /// File name to which this position refers.
  85     ]b4_filename_type[* filename;
  86     /// Current line number.
  87     unsigned int line;
  88     /// Current column number.
  89     unsigned int column;
  90   };
  91
  92   /// Add and assign a position.
  93   inline const position&
  94   operator+= (position& res, const int width)
  95   {
  96     res.columns (width);
  97     return res;
  98   }
  99
 100   /// Add two position objects.
 101   inline const position
 102   operator+ (const position& begin, const int width)
 103   {
 104     position res = begin;
 105     return res += width;
 106   }
 107
 108   /// Add and assign a position.
 109   inline const position&
 110   operator-= (position& res, const int width)
 111   {
 112     return res += -width;
 113   }
 114
 115   /// Add two position objects.
 116   inline const position
 117   operator- (const position& begin, const int width)
 118   {
 119     return begin + -width;
 120   }
 121
 122   /** \brief Intercept output stream redirection.
 123    ** \param ostr the destination output stream
 124    ** \param pos a reference to the position to redirect
 125    */
 126   inline std::ostream&
 127   operator<< (std::ostream& ostr, const position& pos)
 128   {
 129     if (pos.filename)
 130       ostr << *pos.filename << ':';
 131     return ostr << pos.line << '.' << pos.column;
 132   }
 133
 134 }
 135 #endif // not BISON_POSITION_HH]
 136 @output b4_dir_prefix[]location.hh
 137 b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
 138
 139 /**
 140  ** \file location.hh
 141  ** Define the yy::location class.
 142  */
 143
 144 #ifndef BISON_LOCATION_HH
 145 # define BISON_LOCATION_HH
 146
 147 # include <iostream>
 148 # include <string>
 149 # include "position.hh"
 150
 151 namespace yy
 152 {
 153
 154   /// Abstract a location.
 155   class location
 156   {
 157   public:
 158 ]m4_ifdef([b4_location_constructors], [
 159     /// Construct a location.
 160     location ()
 161       : begin (), end ()
 162     {
 163     }
 164
 165 ])[
 166     /// Initialization.
 167     inline void initialize (]b4_filename_type[* fn)
 168     {
 169       begin.initialize (fn);
 170       end = begin;
 171     }
 172
 173     /** \name Line and Column related manipulators
 174      ** \{ */
 175   public:
 176     /// Reset initial location to final location.
 177     inline void step ()
 178     {
 179       begin = end;
 180     }
 181
 182     /// Extend the current location to the COUNT next columns.
 183     inline void columns (unsigned int count = 1)
 184     {
 185       end += count;
 186     }
 187
 188     /// Extend the current location to the COUNT next lines.
 189     inline void lines (unsigned int count = 1)
 190     {
 191       end.lines (count);
 192     }
 193     /** \} */
 194
 195
 196   public:
 197     /// Beginning of the located region.
 198     position begin;
 199     /// End of the located region.
 200     position end;
 201   };
 202
 203   /// Join two location objects to create a location.
 204   inline const location operator+ (const location& begin, const location& end)
 205   {
 206     location res = begin;
 207     res.end = end.end;
 208     return res;
 209   }
 210
 211   /// Add two location objects.
 212   inline const location operator+ (const location& begin, unsigned int width)
 213   {
 214     location res = begin;
 215     res.columns (width);
 216     return res;
 217   }
 218
 219   /// Add and assign a location.
 220   inline location& operator+= (location& res, unsigned int width)
 221   {
 222     res.columns (width);
 223     return res;
 224   }
 225
 226   /** \brief Intercept output stream redirection.
 227    ** \param ostr the destination output stream
 228    ** \param loc a reference to the location to redirect
 229    **
 230    ** Avoid duplicate information.
 231    */
 232   inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
 233   {
 234     position last = loc.end - 1;
 235     ostr << loc.begin;
 236     if (last.filename
 237         && (!loc.begin.filename
 238             || *loc.begin.filename != *last.filename))
 239       ostr << '-' << last;
 240     else if (loc.begin.line != last.line)
 241       ostr << '-' << last.line  << '.' << last.column;
 242     else if (loc.begin.column != last.column)
 243       ostr << '-' << last.column;
 244     return ostr;
 245   }
 246
 247 }
 248
 249 #endif // not BISON_LOCATION_HH]
 250 m4_divert(-1)
 251 m4_changecom([#])