data/location.cc

   1 m4_divert(-1)
   2
   3 # C++ skeleton for Bison
   4
   5 # Copyright (C) 2002, 2003, 2004, 2005 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 m4_include(b4_pkgdatadir/[c++.m4])
  23
  24 # We do want M4 expansion after # for CPP macros.
  25 m4_changecom()
  26 m4_divert(0)dnl
  27 @output b4_dir_prefix[]position.hh
  28 b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])dnl
  29 [/* As a special exception, when this parser skeleton is copied by
  30    Bison into a Bison output file, you may use that output file
  31    without restriction.  This special exception was added by the Free
  32    Software Foundation for C++ parsers in version 2.2 of Bison.  */
  33
  34 /**
  35  ** \file position.hh
  36  ** Define the yy::position class.
  37  */
  38
  39 #ifndef BISON_POSITION_HH
  40 # define BISON_POSITION_HH
  41
  42 # include <iostream>
  43 # include <string>
  44
  45 namespace yy
  46 {
  47   /// Abstract a position.
  48   class position
  49   {
  50   public:
  51 ]m4_ifdef([b4_location_constructors], [
  52     /// Construct a position.
  53     position ()
  54       : filename (0), line (1), column (0)
  55     {
  56     }
  57
  58 ])[
  59     /// Initialization.
  60     inline void initialize (]b4_filename_type[* fn)
  61     {
  62       filename = fn;
  63       line = 1;
  64       column = 0;
  65     }
  66
  67     /** \name Line and Column related manipulators
  68      ** \{ */
  69   public:
  70     /// (line related) Advance to the COUNT next lines.
  71     inline void lines (int count = 1)
  72     {
  73       column = 0;
  74       line += count;
  75     }
  76
  77     /// (column related) Advance to the COUNT next columns.
  78     inline void columns (int count = 1)
  79     {
  80       int leftmost = 0;
  81       int current  = column;
  82       if (leftmost <= current + count)
  83         column += count;
  84       else
  85         column = 0;
  86     }
  87     /** \} */
  88
  89   public:
  90     /// File name to which this position refers.
  91     ]b4_filename_type[* filename;
  92     /// Current line number.
  93     unsigned int line;
  94     /// Current column number.
  95     unsigned int column;
  96   };
  97
  98   /// Add and assign a position.
  99   inline const position&
 100   operator+= (position& res, const int width)
 101   {
 102     res.columns (width);
 103     return res;
 104   }
 105
 106   /// Add two position objects.
 107   inline const position
 108   operator+ (const position& begin, const int width)
 109   {
 110     position res = begin;
 111     return res += width;
 112   }
 113
 114   /// Add and assign a position.
 115   inline const position&
 116   operator-= (position& res, const int width)
 117   {
 118     return res += -width;
 119   }
 120
 121   /// Add two position objects.
 122   inline const position
 123   operator- (const position& begin, const int width)
 124   {
 125     return begin + -width;
 126   }
 127
 128   /** \brief Intercept output stream redirection.
 129    ** \param ostr the destination output stream
 130    ** \param pos a reference to the position to redirect
 131    */
 132   inline std::ostream&
 133   operator<< (std::ostream& ostr, const position& pos)
 134   {
 135     if (pos.filename)
 136       ostr << *pos.filename << ':';
 137     return ostr << pos.line << '.' << pos.column;
 138   }
 139
 140 }
 141 #endif // not BISON_POSITION_HH]
 142 @output b4_dir_prefix[]location.hh
 143 b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
 144
 145 /**
 146  ** \file location.hh
 147  ** Define the yy::location class.
 148  */
 149
 150 #ifndef BISON_LOCATION_HH
 151 # define BISON_LOCATION_HH
 152
 153 # include <iostream>
 154 # include <string>
 155 # include "position.hh"
 156
 157 namespace yy
 158 {
 159
 160   /// Abstract a location.
 161   class location
 162   {
 163   public:
 164 ]m4_ifdef([b4_location_constructors], [
 165     /// Construct a location.
 166     location ()
 167       : begin (), end ()
 168     {
 169     }
 170
 171 ])[
 172     /// Initialization.
 173     inline void initialize (]b4_filename_type[* fn)
 174     {
 175       begin.initialize (fn);
 176       end = begin;
 177     }
 178
 179     /** \name Line and Column related manipulators
 180      ** \{ */
 181   public:
 182     /// Reset initial location to final location.
 183     inline void step ()
 184     {
 185       begin = end;
 186     }
 187
 188     /// Extend the current location to the COUNT next columns.
 189     inline void columns (unsigned int count = 1)
 190     {
 191       end += count;
 192     }
 193
 194     /// Extend the current location to the COUNT next lines.
 195     inline void lines (unsigned int count = 1)
 196     {
 197       end.lines (count);
 198     }
 199     /** \} */
 200
 201
 202   public:
 203     /// Beginning of the located region.
 204     position begin;
 205     /// End of the located region.
 206     position end;
 207   };
 208
 209   /// Join two location objects to create a location.
 210   inline const location operator+ (const location& begin, const location& end)
 211   {
 212     location res = begin;
 213     res.end = end.end;
 214     return res;
 215   }
 216
 217   /// Add two location objects.
 218   inline const location operator+ (const location& begin, unsigned int width)
 219   {
 220     location res = begin;
 221     res.columns (width);
 222     return res;
 223   }
 224
 225   /// Add and assign a location.
 226   inline location& operator+= (location& res, unsigned int width)
 227   {
 228     res.columns (width);
 229     return res;
 230   }
 231
 232   /** \brief Intercept output stream redirection.
 233    ** \param ostr the destination output stream
 234    ** \param loc a reference to the location to redirect
 235    **
 236    ** Avoid duplicate information.
 237    */
 238   inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
 239   {
 240     position last = loc.end - 1;
 241     ostr << loc.begin;
 242     if (last.filename
 243         && (!loc.begin.filename
 244             || *loc.begin.filename != *last.filename))
 245       ostr << '-' << last;
 246     else if (loc.begin.line != last.line)
 247       ostr << '-' << last.line  << '.' << last.column;
 248     else if (loc.begin.column != last.column)
 249       ostr << '-' << last.column;
 250     return ostr;
 251   }
 252
 253 }
 254
 255 #endif // not BISON_LOCATION_HH]
 256 m4_divert(-1)
 257 m4_changecom([#])