forked from boostorg/mpl
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/switch.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2003
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// Aleksey Gurtovoy
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_MPL_SWITCH_HPP_INCLUDED
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#define BOOST_MPL_SWITCH_HPP_INCLUDED
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#include "boost/mpl/find_if.hpp"
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#include "boost/mpl/select1st.hpp"
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#include "boost/mpl/select2nd.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/aux_/void_spec.hpp"
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#include "boost/mpl/aux_/lambda_support.hpp"
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namespace boost {
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namespace mpl {
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template<
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typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Body)
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, typename BOOST_MPL_AUX_VOID_SPEC_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< select1st<_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 select2nd<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_VOID_SPEC(2, switch_)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_SWITCH_HPP_INCLUDED
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