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49 lines
1.3 KiB
49 lines
1.3 KiB
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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: switch.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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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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