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// Copyright (C) 2004 Peder Holt
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_TYPETRAITS_MSVC_TYPEOF_HPP
#define BOOST_TYPETRAITS_MSVC_TYPEOF_HPP
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
namespace boost { namespace detail {
# if BOOST_WORKAROUND(BOOST_MSVC,==1300)
template<typename ID>
struct msvc_extract_type
{
template<bool>
struct id2type_impl;
typedef id2type_impl<true> id2type;
};
template<typename T, typename ID>
struct msvc_register_type : msvc_extract_type<ID>
{
template<>
struct id2type_impl<true> //VC7.0 specific bugfeature
{
typedef T type;
};
};
# else
template<typename ID>
struct msvc_extract_type
{
struct id2type;
};
template<typename T, typename ID>
struct msvc_register_type : msvc_extract_type<ID>
{
typedef msvc_extract_type<ID> base_type;
struct base_type::id2type // This uses nice VC6.5 and VC7.1 bugfeature
{
typedef T type;
};
};
# endif
}}
#endif //BOOST_TYPETRAITS_MSVC_TYPEOF_IMPL_HPP
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