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1 | // Boost.TypeErasure library |
2 | // | |
3 | // Copyright 2011 Steven Watanabe | |
4 | // | |
5 | // Distributed under the Boost Software License Version 1.0. (See | |
6 | // accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // $Id$ | |
10 | ||
11 | #ifndef BOOST_TYPE_ERASURE_DERIVED_HPP_INCLUDED | |
12 | #define BOOST_TYPE_ERASURE_DERIVED_HPP_INCLUDED | |
13 | ||
14 | namespace boost { | |
15 | namespace type_erasure { | |
16 | ||
17 | /** | |
18 | * A metafunction which returns the full @ref any type, | |
19 | * when given any of its base classes. This is primarily | |
20 | * intended to be used when implementing @ref concept_interface. | |
21 | * | |
22 | * \see rebind_any, as_param | |
23 | */ | |
24 | template<class T> | |
25 | struct derived | |
26 | { | |
27 | #ifdef BOOST_TYPE_ERASURE_DOXYGEN | |
28 | typedef detail::unspecified type; | |
29 | #else | |
30 | typedef typename T::_boost_type_erasure_derived_type type; | |
31 | #endif | |
32 | }; | |
33 | ||
34 | } | |
35 | } | |
36 | ||
37 | #endif |