| 1 | |
|---|---|
| 2 | #ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED |
| 3 | #define BOOST_MPL_IDENTITY_HPP_INCLUDED |
| 4 | |
| 5 | // Copyright Aleksey Gurtovoy 2000-2004 |
| 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_/na_spec.hpp> |
| 18 | #include <boost/mpl/aux_/lambda_support.hpp> |
| 19 | |
| 20 | namespace boost { namespace mpl { |
| 21 | |
| 22 | template< |
| 23 | typename BOOST_MPL_AUX_NA_PARAM(T) |
| 24 | > |
| 25 | struct identity |
| 26 | { |
| 27 | typedef T type; |
| 28 | BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T)) |
| 29 | }; |
| 30 | |
| 31 | template< |
| 32 | typename BOOST_MPL_AUX_NA_PARAM(T) |
| 33 | > |
| 34 | struct make_identity |
| 35 | { |
| 36 | typedef identity<T> type; |
| 37 | BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T)) |
| 38 | }; |
| 39 | |
| 40 | BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity) |
| 41 | BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity) |
| 42 | |
| 43 | }} |
| 44 | |
| 45 | #endif // BOOST_MPL_IDENTITY_HPP_INCLUDED |
| 46 |