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: type_wrapper.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 15 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ 16 // $Revision: 49267 $ 17 18 #include <boost/mpl/aux_/config/ctps.hpp> 19 20 namespace boost { namespace mpl { namespace aux { 21 22 template< 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 32 template< typename T > struct wrapped_type; 33 34 template< typename T > struct wrapped_type< type_wrapper<T> > 35 { 36 typedef T type; 37 }; 38 #else 39 template< 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
