knotkit/knot_parser/position.hh

/* A Bison parser, made by GNU Bison 2.4.3.  */

/* Positions for Bison parsers in C++
   
      Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 Free Software
   Foundation, Inc.
   
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   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* As a special exception, you may create a larger work that contains
   part or all of the Bison parser skeleton and distribute that work
   under terms of your choice, so long as that work isn't itself a
   parser generator using the skeleton or a modified version thereof
   as a parser skeleton.  Alternatively, if you modify or redistribute
   the parser skeleton itself, you may (at your option) remove this
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   Bison output files to be licensed under the GNU General Public
   License without this special exception.
   
   This special exception was added by the Free Software Foundation in
   version 2.2 of Bison.  */

/**
 ** \file position.hh
 ** Define the yy::position class.
 */

#ifndef BISON_POSITION_HH
# define BISON_POSITION_HH

# include <iostream>
# include <string>
# include <algorithm>


namespace yy {

/* Line 38 of location.cc  */
#line 51 "knot_parser/position.hh"
  /// Abstract a position.
  class position
  {
  public:

    /// Construct a position.
    position ()
      : filename (0), line (1), column (1)
    {
    }


    /// Initialization.
    inline void initialize (std::string* fn)
    {
      filename = fn;
      line = 1;
      column = 1;
    }

    /** \name Line and Column related manipulators
     ** \{ */
  public:
    /// (line related) Advance to the COUNT next lines.
    inline void lines (int count = 1)
    {
      column = 1;
      line += count;
    }

    /// (column related) Advance to the COUNT next columns.
    inline void columns (int count = 1)
    {
      column = std::max (1u, column + count);
    }
    /** \} */

  public:
    /// File name to which this position refers.
    std::string* filename;
    /// Current line number.
    unsigned int line;
    /// Current column number.
    unsigned int column;
  };

  /// Add and assign a position.
  inline const position&
  operator+= (position& res, const int width)
  {
    res.columns (width);
    return res;
  }

  /// Add two position objects.
  inline const position
  operator+ (const position& begin, const int width)
  {
    position res = begin;
    return res += width;
  }

  /// Add and assign a position.
  inline const position&
  operator-= (position& res, const int width)
  {
    return res += -width;
  }

  /// Add two position objects.
  inline const position
  operator- (const position& begin, const int width)
  {
    return begin + -width;
  }

  /// Compare two position objects.
  inline bool
  operator== (const position& pos1, const position& pos2)
  {
    return (pos1.line == pos2.line
            && pos1.column == pos2.column
            && (pos1.filename == pos2.filename
                || (pos1.filename && pos2.filename
                    && *pos1.filename == *pos2.filename)));
  }

  /// Compare two position objects.
  inline bool
  operator!= (const position& pos1, const position& pos2)
  {
    return !(pos1 == pos2);
  }

  /** \brief Intercept output stream redirection.
   ** \param ostr the destination output stream
   ** \param pos a reference to the position to redirect
   */
  inline std::ostream&
  operator<< (std::ostream& ostr, const position& pos)
  {
    if (pos.filename)
      ostr << *pos.filename << ':';
    return ostr << pos.line << '.' << pos.column;
  }


} // yy

/* Line 145 of location.cc  */
#line 162 "knot_parser/position.hh"
#endif // not BISON_POSITION_HH