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
21namespace boost { namespace mpl {
22
23template< 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
34BOOST_MPL_AUX_ARITY_SPEC(0, always)
35
36}}
37
38#endif // BOOST_MPL_ALWAYS_HPP_INCLUDED
39