1 | |
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2 | #ifndef BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED |
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3 | #define BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED |
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4 | |
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5 | // Copyright Aleksey Gurtovoy 2000-2004 |
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6 | // Copyright Peter Dimov 2000-2003 |
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7 | // |
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8 | // Distributed under the Boost Software License, Version 1.0. |
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9 | // (See accompanying file LICENSE_1_0.txt or copy at |
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10 | // http://www.boost.org/LICENSE_1_0.txt) |
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11 | // |
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12 | // See http://www.boost.org/libs/mpl for documentation. |
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13 | |
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14 | // $Id: type_wrapper.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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15 | // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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16 | // $Revision: 49267 $ |
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17 | |
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18 | #include <boost/mpl/aux_/config/ctps.hpp> |
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19 | |
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20 | namespace boost { namespace mpl { namespace aux { |
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21 | |
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22 | template< typename T > struct type_wrapper |
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23 | { |
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24 | typedef T type; |
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25 | }; |
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26 | |
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27 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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28 | // agurt 08/may/03: a complicated way to extract the wrapped type; need it |
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29 | // mostly for the sake of GCC (3.2.x), which ICEs if you try to extract the |
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30 | // nested 'type' from 'type_wrapper<T>' when the latter was the result of a |
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31 | // 'typeof' expression |
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32 | template< typename T > struct wrapped_type; |
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33 | |
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34 | template< typename T > struct wrapped_type< type_wrapper<T> > |
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35 | { |
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36 | typedef T type; |
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37 | }; |
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38 | #else |
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39 | template< typename W > struct wrapped_type |
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40 | { |
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41 | typedef typename W::type type; |
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42 | }; |
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43 | #endif |
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44 | |
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45 | }}} |
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46 | |
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47 | #endif // BOOST_MPL_AUX_TYPE_WRAPPER_HPP_INCLUDED |
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