invert.hh

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// product.hh: this file is part of the Vaucanson project.
//
// Vaucanson, a generic library for finite state machines.
//
// Copyright (C) 2006, 2008 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_ALGORITHMS_INVERT_HH
# define VCSN_ALGORITHMS_INVERT_HH

# include <vaucanson/design_pattern/design_pattern.hh>

// FIXME: the return type must be InvertAutomaton (but alas there is no invert_traits_helper
// as for now)
// FIXME: the algorithm shouldn't return a reference
// INTERFACE: Automaton& invert(const Automaton& a1) { return vcsn::invert(*a1); }

namespace vcsn {

  template<typename A, typename T>
  void
  invert(const Element<A, T>& t,
         Element<A, T>& res);

  template<typename A, typename T>
  Element<A, T>&
  invert(const Element<A, T>& t);

} // vcsn

# if !defined VCSN_USE_INTERFACE_ONLY && !defined VCSN_USE_LIB
#  include <vaucanson/algorithms/invert.hxx>
# endif // VCSN_USE_INTERFACE_ONLY

#endif // !VCSN_ALGORITHMS_INVERT_HH