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1 | |
2 | #ifndef BOOST_MPL_ALWAYS_HPP_INCLUDED | |
3 | #define BOOST_MPL_ALWAYS_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2001-2004 | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. | |
8 | // (See accompanying file LICENSE_1_0.txt or copy at | |
9 | // http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | // See http://www.boost.org/libs/mpl for documentation. | |
12 | ||
13 | // $Id$ | |
14 | // $Date$ | |
15 | // $Revision$ | |
16 | ||
17 | #include <boost/mpl/aux_/preprocessor/default_params.hpp> | |
18 | #include <boost/mpl/aux_/na.hpp> | |
19 | #include <boost/mpl/aux_/arity_spec.hpp> | |
20 | ||
21 | namespace boost { namespace mpl { | |
22 | ||
23 | template< typename Value > struct always | |
24 | { | |
25 | template< | |
26 | BOOST_MPL_PP_DEFAULT_PARAMS(BOOST_MPL_LIMIT_METAFUNCTION_ARITY, typename T, na) | |
27 | > | |
28 | struct apply | |
29 | { | |
30 | typedef Value type; | |
31 | }; | |
32 | }; | |
33 | ||
34 | BOOST_MPL_AUX_ARITY_SPEC(0, always) | |
35 | ||
36 | }} | |
37 | ||
38 | #endif // BOOST_MPL_ALWAYS_HPP_INCLUDED |