63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
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#ifndef BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED
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#define BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED
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// Copyright Eric Friedman 2003
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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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// $Source$
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// $Date$
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// $Revision$
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#include <boost/mpl/apply.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/pair.hpp>
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#include <boost/mpl/deref.hpp>
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#include <boost/mpl/push_front.hpp>
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#include <boost/mpl/aux_/lambda_spec.hpp>
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namespace boost { namespace mpl {
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namespace aux {
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template <typename Predicate>
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struct partition_op
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{
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template <typename State, typename Iter>
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struct apply
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{
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private:
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typedef typename State::first first_;
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typedef typename State::second second_;
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typedef typename deref<Iter>::type t_;
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typedef typename apply1< Predicate,t_ >::type pred_;
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typedef typename eval_if<
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pred_
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, push_front< first_, t_ >
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, push_front< second_, t_ >
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>::type result_;
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public:
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typedef typename if_<
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pred_
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, pair< result_,second_ >
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, pair< first_,result_ >
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>::type type;
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};
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};
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} // namespace aux
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BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1,aux::partition_op)
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}}
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#endif // BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED
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