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# is_empty.hxx

    00001 // is_empty.hxx: this file is part of the Vaucanson project.
    00002 //
    00003 // Vaucanson, a generic library for finite state machines.
    00004 //
    00005 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2008 The Vaucanson Group.
    00006 //
    00007 // This program is free software; you can redistribute it and/or
    00008 // modify it under the terms of the GNU General Public License
    00009 // as published by the Free Software Foundation; either version 2
    00010 // of the License, or (at your option) any later version.
    00011 //
    00012 // The complete GNU General Public Licence Notice can be found as the
    00013 // `COPYING' file in the root directory.
    00014 //
    00015 // The Vaucanson Group consists of people listed in the `AUTHORS' file.
    00016 //
    00017 #ifndef VCSN_ALGORITHMS_IS_EMPTY_HXX
    00018 # define VCSN_ALGORITHMS_IS_EMPTY_HXX
    00019
    00020 # include <vaucanson/algorithms/is_empty.hh>
    00021
    00022 # include <vaucanson/automata/concept/automata_base.hh>
    00023
    00024 # include <algorithm>
    00025
    00026 namespace vcsn {
    00027
    00028   template<typename A, typename AI>
    00029   bool
    00030   is_empty(const Element<A, AI>& a)
    00031   {
    00032     return a.states ().size () == 0;
    00033   }
    00034
    00035 } // vcsn
    00036
    00037 #endif // ! VCSN_ALGORITHMS_IS_EMPTY_HXX