eoSTLFunctor.h

// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-

//-----------------------------------------------------------------------------
// eoSTLFunctor.h
// (c) Maarten Keijzer 2001
/*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
             Marc.Schoenauer@polytechnique.fr
             mak@dhi.dk
 */
//-----------------------------------------------------------------------------

#ifndef _eoSTLFunctor_H
#define _eoSTLFunctor_H

#include "eoFunctor.h"

template <class R>
class eoSTLF
{
  public:

    typedef R result_type;

    eoSTLF(eoF<R>& _f) : f(_f) {}

    R operator()(void)
    {
      return f();
    }

  private :

  eoF<R>& f;
};

#ifdef _MSVC


template <>
void eoSTLF<void>::operator()(void)
{
  f();
}
#endif

template <class A1, class R>
class eoSTLUF : public std::unary_function<A1, R>
{
  public:
    eoSTLUF(eoUF<A1,R>& _f) : f(_f) {}

    R operator()(A1 a)
    {
      return f(a);
    }

  private:
    eoUF<A1, R>& f;
};

template <class A1, class A2, class R>
class eoSTLBF : public std::binary_function<A1, A2, R>
{
  public:
    eoSTLBF(eoUF<A1,R>& _f) : f(_f) {}

    R operator()(A1 a1, A2 a2)
    {
      return f(a1, a2);
    }

  private:

    eoBF<A1, A2, R>& f;
};


#endif