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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #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: switch.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
// $Revision: 49267 $
#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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