DefaultIntegral.h

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#ifndef ZYPP_BASE_DEFAULTINTEGRAL_H
#define ZYPP_BASE_DEFAULTINTEGRAL_H

#include <iosfwd>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_integral.hpp>

namespace zypp
{ 


  //
  //  CLASS NAME : DefaultIntegral<_Tp,_Initial>
  //
  template<class _Tp, _Tp _Initial>
    class DefaultIntegral
    {
    public:
      typedef _Tp value_type;

    public:
      DefaultIntegral( _Tp val_r = _Initial )
      : _val( val_r )
      { BOOST_STATIC_ASSERT(boost::is_integral<_Tp>::value); }

      _Tp & get()       { return _val; }
      _Tp   get() const { return _val; }

      operator _Tp &()       { return get(); }
      operator _Tp  () const { return get(); }

      DefaultIntegral & reset() { _val = _Initial; return *this; }

      DefaultIntegral & operator=( _Tp rhs )  {  _val = rhs; return *this; }
      DefaultIntegral & operator+=( _Tp rhs ) { _val += rhs; return *this; }
      DefaultIntegral & operator-=( _Tp rhs ) { _val -= rhs; return *this; }
      DefaultIntegral & operator*=( _Tp rhs ) { _val *= rhs; return *this; }
      DefaultIntegral & operator/=( _Tp rhs ) { _val /= rhs; return *this; }

      DefaultIntegral & operator++(/*prefix*/) { ++_val; return *this; }
      DefaultIntegral & operator--(/*prefix*/) { ++_val; return *this; }

      DefaultIntegral operator++(int/*postfix*/) { return _val++; }
      DefaultIntegral operator--(int/*postfix*/) { return _val--; }

    private:
      _Tp _val;
    };

} // namespace zypp
#endif // ZYPP_BASE_DEFAULTINTEGRAL_H