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85 lines
2.1 KiB
85 lines
2.1 KiB
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#ifndef BOOST_MPL_UNIQUE_HPP_INCLUDED |
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#define BOOST_MPL_UNIQUE_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2000-2004 |
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// Copyright John R. Bandela 2000-2002 |
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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: unique.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/eval_if.hpp> |
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#include <boost/mpl/and.hpp> |
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#include <boost/mpl/identity.hpp> |
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#include <boost/mpl/pair.hpp> |
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#include <boost/mpl/apply.hpp> |
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#include <boost/mpl/aux_/inserter_algorithm.hpp> |
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#include <boost/mpl/aux_/na.hpp> |
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#include <boost/mpl/aux_/na_spec.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, typename Operation > |
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struct unique_op |
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{ |
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template< typename Pair, typename T > struct apply |
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{ |
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typedef typename Pair::first seq_; |
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typedef typename Pair::second prior_; |
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typedef typename eval_if< |
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and_< is_not_na<prior_>, apply2<Predicate,prior_,T> > |
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, identity<seq_> |
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, apply2<Operation,seq_,T> |
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>::type new_seq_; |
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typedef pair<new_seq_,T> type; |
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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 unique_impl |
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: first< typename fold< |
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Sequence |
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, pair< typename Inserter::state,na > |
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, protect< aux::unique_op<Predicate,typename Inserter::operation> > |
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>::type > |
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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_unique_impl |
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: first< typename reverse_fold< |
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Sequence |
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, pair< typename Inserter::state,na > |
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, protect< aux::unique_op<Predicate,typename Inserter::operation> > |
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>::type > |
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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, unique) |
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}} |
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#endif // BOOST_MPL_UNIQUE_HPP_INCLUDED
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