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