1
2#ifndef BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED
3#define BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2004
6// Copyright Peter Dimov 2000-2003
7//
8// Distributed under the Boost Software License, Version 1.0.
9// (See accompanying file LICENSE_1_0.txt or copy at
10// http://www.boost.org/LICENSE_1_0.txt)
11//
12// See http://www.boost.org/libs/mpl for documentation.
13
14// $Id$
15// $Date$
16// $Revision$
17
18#include <boost/mpl/aux_/config/ctps.hpp>
19
20namespace boost { namespace mpl { namespace aux {
21
22template< typename T > struct type_wrapper
23{
24 typedef T type;
25};
26
27#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
28// agurt 08/may/03: a complicated way to extract the wrapped type; need it
29// mostly for the sake of GCC (3.2.x), which ICEs if you try to extract the
30// nested 'type' from 'type_wrapper<T>' when the latter was the result of a
31// 'typeof' expression
32template< typename T > struct wrapped_type;
33
34template< typename T > struct wrapped_type< type_wrapper<T> >
35{
36 typedef T type;
37};
38#else
39template< typename W > struct wrapped_type
40{
41 typedef typename W::type type;
42};
43#endif
44
45}}}
46
47#endif // BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED
48