mpl/identity.hpp

Go to the documentation of this file.

 
#ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED
#define BOOST_MPL_IDENTITY_HPP_INCLUDED
 
// Copyright Aleksey Gurtovoy 2000-2004
//
// Distributed under the Boost Software License, Version 1.0. 
// (See accompanying file LICENSE_1_0.txt or copy at 
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/mpl for documentation.
 
// $Id: identity.hpp 13472 2017-08-22 07:53:44Z richean $
// $Date: 2017-08-22 09:53:44 +0200 (Di, 22 Aug 2017) $
// $Revision: 13472 $
 
#include <boost/mpl/aux_/na_spec.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
 
namespace boost { namespace mpl {
 
template<
      typename BOOST_MPL_AUX_NA_PARAM(T)
    >
struct identity
{
    typedef T type;
    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))
};
 
template<
      typename BOOST_MPL_AUX_NA_PARAM(T)
    >
struct make_identity
{
    typedef identity<T> type;
    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))
};
 
BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)
BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)
 
}}
 
#endif // BOOST_MPL_IDENTITY_HPP_INCLUDED