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46 lines
951 B
C++
46 lines
951 B
C++
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#ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED
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#define BOOST_MPL_IDENTITY_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/aux_/na_spec.hpp>
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#include <boost/mpl/aux_/lambda_support.hpp>
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namespace boost { namespace mpl {
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template<
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typename BOOST_MPL_AUX_NA_PARAM(T)
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>
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struct identity
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{
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typedef T type;
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))
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};
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template<
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typename BOOST_MPL_AUX_NA_PARAM(T)
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>
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struct make_identity
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{
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typedef identity<T> type;
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))
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};
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BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)
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BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)
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}}
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#endif // BOOST_MPL_IDENTITY_HPP_INCLUDED
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