functors.h

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/*********************************************************************************
 *    Copyright (C) 2005 by Pierre-Henri WUILLEMIN et Christophe GONZALES *
 *   {prenom.nom}_at_lip6.fr *
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 ********************************************************************************/
// =========================================================================
#ifndef GUM_FUNCTORS_H
#define GUM_FUNCTORS_H
// =========================================================================
#include <cstdlib>
// =========================================================================
#include <agrum/core/argMaxSet.h>
// =========================================================================


namespace gum {

  template < class GUM_SCALAR >
  struct Maximizes {
    // ###########################################################################
    // ###########################################################################

    GUM_SCALAR operator()(const GUM_SCALAR& x, const GUM_SCALAR& y) const {
      return x >= y ? x : y;
    }


    typedef GUM_SCALAR first_argument_type;
    typedef GUM_SCALAR second_argument_type;
    typedef GUM_SCALAR result_type;
  };

  template < class GUM_SCALAR >
  struct Minimizes {
    // ###########################################################################
    // ###########################################################################

    GUM_SCALAR operator()(const GUM_SCALAR& x, const GUM_SCALAR& y) const {
      return x <= y ? x : y;
    }


    typedef GUM_SCALAR first_argument_type;
    typedef GUM_SCALAR second_argument_type;
    typedef GUM_SCALAR result_type;
  };

  template < class GUM_SCALAR >
  struct ArgumentMaximises {
    // ###########################################################################
    // ###########################################################################

    GUM_SCALAR operator()(const GUM_SCALAR& x, const GUM_SCALAR& y) const {
      return x.first >= y.first ? x : y;
    }


    typedef GUM_SCALAR first_argument_type;
    typedef GUM_SCALAR second_argument_type;
    typedef GUM_SCALAR result_type;
  };
}   // namespace gum

#endif   // GUM_FUNCTORS_H