kea/src/lib/eval/position.hh

// A Bison parser, made by GNU Bison 3.0.4.

// Positions for Bison parsers in C++

// Copyright (C) 2002-2015 Free Software Foundation, Inc.

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// it under the terms of the GNU General Public License as published by
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// under terms of your choice, so long as that work isn't itself a
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/**
 ** \file position.hh
 ** Define the isc::eval::position class.
 */

#ifndef YY_YY_POSITION_HH_INCLUDED
# define YY_YY_POSITION_HH_INCLUDED

# include <algorithm> // std::max
# include <iostream>
# include <string>

# ifndef YY_NULLPTR
#  if defined __cplusplus && 201103L <= __cplusplus
#   define YY_NULLPTR nullptr
#  else
#   define YY_NULLPTR 0
#  endif
# endif

#line 21 "parser.yy" // location.cc:337
namespace isc { namespace eval {
#line 56 "position.hh" // location.cc:337
  /// Abstract a position.
  class position
  {
  public:
    /// Construct a position.
    explicit position (std::string* f = YY_NULLPTR,
                       unsigned int l = 1u,
                       unsigned int c = 1u)
      : filename (f)
      , line (l)
      , column (c)
    {
    }


    /// Initialization.
    void initialize (std::string* fn = YY_NULLPTR,
                     unsigned int l = 1u,
                     unsigned int c = 1u)
    {
      filename = fn;
      line = l;
      column = c;
    }

    /** \name Line and Column related manipulators
     ** \{ */
    /// (line related) Advance to the COUNT next lines.
    void lines (int count = 1)
    {
      if (count)
        {
          column = 1u;
          line = add_ (line, count, 1);
        }
    }

    /// (column related) Advance to the COUNT next columns.
    void columns (int count = 1)
    {
      column = add_ (column, count, 1);
    }
    /** \} */

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

  private:
    /// Compute max(min, lhs+rhs) (provided min <= lhs).
    static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min)
    {
      return (0 < rhs || -static_cast<unsigned int>(rhs) < lhs
              ? rhs + lhs
              : min);
    }
  };

  /// Add \a width columns, in place.
  inline position&
  operator+= (position& res, int width)
  {
    res.columns (width);
    return res;
  }

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

  /// Subtract \a width columns, in place.
  inline position&
  operator-= (position& res, int width)
  {
    return res += -width;
  }

  /// Subtract \a width columns.
  inline position
  operator- (position res, int width)
  {
    return res -= 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
   */
  template <typename YYChar>
  inline std::basic_ostream<YYChar>&
  operator<< (std::basic_ostream<YYChar>& ostr, const position& pos)
  {
    if (pos.filename)
      ostr << *pos.filename << ':';
    return ostr << pos.line << '.' << pos.column;
  }

#line 21 "parser.yy" // location.cc:337
} } // isc::eval
#line 180 "position.hh" // location.cc:337
#endif // !YY_YY_POSITION_HH_INCLUDED