mixin.hh

// Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#ifndef MLN_VALUE_MIXIN_HH
# define MLN_VALUE_MIXIN_HH

# include <mln/core/concept/function.hh>
# include <mln/core/concept/image.hh>
# include <mln/value/internal/value_like.hh>

namespace mln
{

  namespace value
  {
    template <typename T, typename F>
    struct mixin;
  }

  namespace trait
  {

    template <typename T, typename F>
    struct value_< mln::value::mixin<T, F> >
      : value_< T > // FIXME
    {
      static const T max()
      {
        static const F f = F();
        return f.max();
      }
    };

  } // end of namespace trait


  namespace value
  {

    template <typename T, typename F>
    struct mixin : T // , Value < mixin<T, F> >, internal::value_like_ <T, mln_enc(T), mixin<T, F>, mixin<T, F> >
    {
      // typedef T value;

      mixin()
      {
      }

      mixin(const T& t)
        : T(t)
      {
      }

      mixin(const mixin& rhs)
        : T(rhs)
      {
      }

      mixin& operator=(const mixin& rhs)
      {
        // FIXME: (?) Test if (this == &rhs)...
        this->T::operator=(rhs);
        return *this;
      }

      mixin& operator=(const T& t)
      {
        // FIXME: (?) Test if (this == &t)...
        this->T::operator=(t);
        return *this;
      }
    };

  } // end of namespace mln::value


  template <typename T, typename F>
  bool operator < (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  {
    static F f;
    return f.less(lhs, rhs);
  }

  // FIXME : check if there is an operator== in F

  //  template <typename T, typename F>
  //  bool operator == (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  //  {
  //    static F f;
  //    return f.equal(lhs, rhs);
  //  }

  template <typename T, typename F>
  bool operator == (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  {
    static F f;
    return !(f.less(lhs, rhs) || f.less(rhs, lhs));
  }

  template <typename T, typename F>
  bool operator <= (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  {
    static F f;
    return f.less(lhs, rhs) || lhs == rhs;
  }

  template <typename T, typename F>
  bool operator > (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  {
    static F f;
    return ! (f.less(lhs, rhs) || lhs == rhs);
  }

  template <typename T, typename F>
  bool operator >= (const value::mixin<T,F>& lhs, const value::mixin<T,F>& rhs)
  {
    static F f;
    return ! f.less(lhs, rhs);
  }

# ifndef MLN_INCLUDE_ONLY

# endif // MLN_INCLUDE_ONLY

}; // end of namespace mln

#endif // ! MLN_VALUE_MIXIN_HH