functors.hh

// functors.hh: this file is part of the Vaucanson project.
//
// Vaucanson, a generic library for finite state machines.
//
// Copyright (C) 2005 The Vaucanson Group.
//
// This program 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; either version 2
// of the License, or (at your option) any later version.
//
// The complete GNU General Public Licence Notice can be found as the
// `COPYING' file in the root directory.
//
// The Vaucanson Group consists of people listed in the `AUTHORS' file.
//
#ifndef VCSN_MISC_FUNCTORS_HH
# define VCSN_MISC_FUNCTORS_HH

# include <functional>
# include <utility>

namespace utility
{

  template <typename T>
  struct pair : public std::binary_function<T, T, std::pair<T, T > >
  {
    std::pair<T, T>     operator()(T x, T y) const;
  };


  template <typename T>
  struct discrepancy : public std::binary_function<T, T, std::pair<T, T> >
  {
    std::pair<T, T>     operator()(T x, T y) const;
  };

} // End of namespace utility.


# ifndef VCSN_USE_INTERFACE_ONLY
#  include <vaucanson/misc/functors.hxx>
# endif // VCSN_USE_INTERFACE_ONLY

#endif // ! VCSN_MISC_FUNCTORS_HH

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