boost_unordered/test/helpers/metafunctions.hpp

// Copyright 2005-2009 Daniel James.
// 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)

#if !defined(BOOST_UNORDERED_TEST_HELPERS_METAFUNCTIONS_HEADER)
#define BOOST_UNORDERED_TEST_HELPERS_METAFUNCTIONS_HEADER

#include <boost/config.hpp>
#include <boost/type_traits/is_same.hpp>

namespace test {
template <class Container>
struct is_set
    : public boost::is_same<BOOST_DEDUCED_TYPENAME Container::key_type,
          BOOST_DEDUCED_TYPENAME Container::value_type>
{
};

template <class Container> struct has_unique_keys
{
    static char flip(BOOST_DEDUCED_TYPENAME Container::iterator const&);
    static long flip(
        std::pair<BOOST_DEDUCED_TYPENAME Container::iterator, bool> const&);
    BOOST_STATIC_CONSTANT(bool,
        value = sizeof(long) ==
                sizeof(flip(
                    ((Container*)0)
                        ->insert(*(
                            BOOST_DEDUCED_TYPENAME Container::value_type*)0))));
};
}

#endif