Range.h

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#ifndef ZYPP_RANGE_H
#define ZYPP_RANGE_H

#include "zypp/RelCompare.h"

namespace zypp
{ 

  namespace range_detail
  {
    bool overlaps( Rel lhs, Rel rhs, int cmp );
  }

  //
  //    CLASS NAME : Range
  //
  template<class _Tp, class _Compare = Compare<_Tp> >
    struct Range
    {
      Rel op;
      _Tp value;

      Range()
      : op( Rel::ANY )
      {}

      Range( const _Tp & value_r )
      : op( Rel::EQ )
      , value( value_r )
      {}

      Range( Rel op_r, const _Tp & value_r )
      : op( op_r )
      , value( value_r )
      {}

      bool overlaps( const Range & rhs ) const
      {
        return range_detail::overlaps( op, rhs.op,
                                       _Compare()( value, rhs.value ) );
      }
    };

  template<class _Tp, class _Compare>
    inline bool overlaps( const Range<_Tp,_Compare> & lhs,
                          const Range<_Tp,_Compare> & rhs )
    { return lhs.overlaps( rhs ); }


  template<class _Tp, class _Compare>
    inline bool operator==( const Range<_Tp,_Compare> & lhs,
                            const Range<_Tp,_Compare> & rhs )
    {
      return( lhs.op == rhs.op
              && (    lhs.op == Rel::ANY
                   || lhs.op == Rel::NONE
                   || relCompare( Rel::EQ, lhs.value, rhs.value,
                                  _Compare() )
                 )
            );
    }

  template<class _Tp, class _Compare>
    inline bool operator!=( const Range<_Tp,_Compare> & lhs,
                            const Range<_Tp,_Compare> & rhs )
    { return ! ( lhs == rhs ); }

} // namespace zypp
#endif // ZYPP_RANGE_H