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- #ifndef BOOST_MPL_SWITCH_HPP_INCLUDED
- #define BOOST_MPL_SWITCH_HPP_INCLUDED
- // Copyright Aleksey Gurtovoy 2003-2004
- //
- // 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.
- // $Id$
- // $Date$
- // $Revision$
- #include <boost/mpl/find_if.hpp>
- #include <boost/mpl/deref.hpp>
- #include <boost/mpl/lambda.hpp>
- #include <boost/mpl/apply.hpp>
- #include <boost/mpl/pair.hpp>
- #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(Body)
- , typename BOOST_MPL_AUX_NA_PARAM(T)
- >
- struct switch_
- {
- typedef typename find_if<
- Body
- , apply1< lambda< first<_1> >, T >
- >::type iter_;
-
- typedef typename deref<iter_>::type pair_;
- typedef typename lambda< typename second<pair_>::type >::type f_;
- typedef typename apply1<f_,T>::type type;
- BOOST_MPL_AUX_LAMBDA_SUPPORT(2,switch_,(Body,T))
- };
- BOOST_MPL_AUX_NA_SPEC(2, switch_)
- }}
- #endif // BOOST_MPL_SWITCH_HPP_INCLUDED
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