parser/position.hh

   1 /* A Bison parser, made by GNU Bison 2.4.3.  */
   2
   3 /* Positions for Bison parsers in C++
   4
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  16    GNU General Public License for more details.
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  31    This special exception was added by the Free Software Foundation in
  32    version 2.2 of Bison.  */
  33
  34 /**
  35  ** \file position.hh
  36  ** Define the objectbuilder::position class.
  37  */
  38
  39 #ifndef BISON_POSITION_HH
  40 # define BISON_POSITION_HH
  41
  42 # include <iostream>
  43 # include <string>
  44 # include <algorithm>
  45
  46
  47 namespace objectbuilder {
  48
  49 /* Line 38 of location.cc  */
  50 #line 51 "position.hh"
  51   /// Abstract a position.
  52   class position
  53   {
  54   public:
  55
  56     /// Construct a position.
  57     position ()
  58       : filename (0), line (1), column (1)
  59     {
  60     }
  61
  62
  63     /// Initialization.
  64     inline void initialize (std::string* fn)
  65     {
  66       filename = fn;
  67       line = 1;
  68       column = 1;
  69     }
  70
  71     /** \name Line and Column related manipulators
  72      ** \{ */
  73   public:
  74     /// (line related) Advance to the COUNT next lines.
  75     inline void lines (int count = 1)
  76     {
  77       column = 1;
  78       line += count;
  79     }
  80
  81     /// (column related) Advance to the COUNT next columns.
  82     inline void columns (int count = 1)
  83     {
  84       column = std::max (1u, column + count);
  85     }
  86     /** \} */
  87
  88   public:
  89     /// File name to which this position refers.
  90     std::string* filename;
  91     /// Current line number.
  92     unsigned int line;
  93     /// Current column number.
  94     unsigned int column;
  95   };
  96
  97   /// Add and assign a position.
  98   inline const position&
  99   operator+= (position& res, const int width)
 100   {
 101     res.columns (width);
 102     return res;
 103   }
 104
 105   /// Add two position objects.
 106   inline const position
 107   operator+ (const position& begin, const int width)
 108   {
 109     position res = begin;
 110     return res += width;
 111   }
 112
 113   /// Add and assign a position.
 114   inline const position&
 115   operator-= (position& res, const int width)
 116   {
 117     return res += -width;
 118   }
 119
 120   /// Add two position objects.
 121   inline const position
 122   operator- (const position& begin, const int width)
 123   {
 124     return begin + -width;
 125   }
 126
 127   /// Compare two position objects.
 128   inline bool
 129   operator== (const position& pos1, const position& pos2)
 130   {
 131     return (pos1.line == pos2.line
 132             && pos1.column == pos2.column
 133             && (pos1.filename == pos2.filename
 134                 || (pos1.filename && pos2.filename
 135                     && *pos1.filename == *pos2.filename)));
 136   }
 137
 138   /// Compare two position objects.
 139   inline bool
 140   operator!= (const position& pos1, const position& pos2)
 141   {
 142     return !(pos1 == pos2);
 143   }
 144
 145   /** \brief Intercept output stream redirection.
 146    ** \param ostr the destination output stream
 147    ** \param pos a reference to the position to redirect
 148    */
 149   inline std::ostream&
 150   operator<< (std::ostream& ostr, const position& pos)
 151   {
 152     if (pos.filename)
 153       ostr << *pos.filename << ':';
 154     return ostr << pos.line << '.' << pos.column;
 155   }
 156
 157
 158 } // objectbuilder
 159
 160 /* Line 145 of location.cc  */
 161 #line 162 "position.hh"
 162 #endif // not BISON_POSITION_HH