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96 lines
2.1 KiB
96 lines
2.1 KiB
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#ifndef BOOST_MPL_COPY_IF_HPP_INCLUDED |
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#define BOOST_MPL_COPY_IF_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2000-2004 |
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// Copyright David Abrahams 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: copy_if.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/fold.hpp> |
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#include <boost/mpl/reverse_fold.hpp> |
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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/identity.hpp> |
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#include <boost/mpl/protect.hpp> |
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#include <boost/mpl/aux_/inserter_algorithm.hpp> |
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#include <boost/mpl/aux_/config/forwarding.hpp> |
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namespace boost { namespace mpl { |
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namespace aux { |
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template< |
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typename Operation |
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, typename Predicate |
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> |
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struct copy_if_op |
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{ |
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template< typename Sequence, typename T > struct apply |
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#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
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: eval_if< |
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typename apply1<Predicate,T>::type |
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, apply2<Operation,Sequence,T> |
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, identity<Sequence> |
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> |
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{ |
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#else |
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{ |
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typedef typename eval_if< |
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typename apply1<Predicate,T>::type |
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, apply2<Operation,Sequence,T> |
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, identity<Sequence> |
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>::type type; |
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#endif |
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}; |
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}; |
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template< |
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typename Sequence |
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, typename Predicate |
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, typename Inserter |
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> |
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struct copy_if_impl |
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: fold< |
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Sequence |
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, typename Inserter::state |
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, protect< aux::copy_if_op< |
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typename Inserter::operation |
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, Predicate |
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> > |
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> |
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{ |
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}; |
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template< |
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typename Sequence |
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, typename Predicate |
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, typename Inserter |
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> |
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struct reverse_copy_if_impl |
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: reverse_fold< |
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Sequence |
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, typename Inserter::state |
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, protect< aux::copy_if_op< |
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typename Inserter::operation |
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, Predicate |
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> > |
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> |
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{ |
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}; |
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} // namespace aux |
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BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, copy_if) |
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}} |
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#endif // BOOST_MPL_COPY_IF_HPP_INCLUDED
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