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//=======================================================================
// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//=======================================================================
#ifndef BOOST_GRAPH_DETAIL_IS_SAME_HPP
#define BOOST_GRAPH_DETAIL_IS_SAME_HPP
#include <boost/pending/ct_if.hpp>
namespace boost {
struct false_tag;
struct true_tag;
namespace graph_detail {
#if !defined BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class U, class V>
struct is_same {
typedef boost::false_tag is_same_tag;
};
template <class U>
struct is_same<U, U> {
typedef boost::true_tag is_same_tag;
};
#else
template <class U, class V>
struct is_same {
enum { Unum = U::num, Vnum = V::num };
typedef typename boost::ct_if< (Unum == Vnum),
boost::true_tag, boost::false_tag>::type is_same_tag;
};
#endif
} // namespace graph_detail
} // namespace boost
#endif