| |
| #ifndef BOOST_MPL_UNIQUE_HPP_INCLUDED |
| #define BOOST_MPL_UNIQUE_HPP_INCLUDED |
| |
| // Copyright Aleksey Gurtovoy 2000-2004 |
| // Copyright John R. Bandela 2000-2002 |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/mpl for documentation. |
| |
| // $Id: unique.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
| // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
| // $Revision: 49267 $ |
| |
| #include <boost/mpl/fold.hpp> |
| #include <boost/mpl/reverse_fold.hpp> |
| #include <boost/mpl/eval_if.hpp> |
| #include <boost/mpl/and.hpp> |
| #include <boost/mpl/identity.hpp> |
| #include <boost/mpl/pair.hpp> |
| #include <boost/mpl/apply.hpp> |
| #include <boost/mpl/aux_/inserter_algorithm.hpp> |
| #include <boost/mpl/aux_/na.hpp> |
| #include <boost/mpl/aux_/na_spec.hpp> |
| #include <boost/mpl/aux_/lambda_spec.hpp> |
| |
| namespace boost { namespace mpl { |
| |
| namespace aux { |
| |
| template< typename Predicate, typename Operation > |
| struct unique_op |
| { |
| template< typename Pair, typename T > struct apply |
| { |
| typedef typename Pair::first seq_; |
| typedef typename Pair::second prior_; |
| typedef typename eval_if< |
| and_< is_not_na<prior_>, apply2<Predicate,prior_,T> > |
| , identity<seq_> |
| , apply2<Operation,seq_,T> |
| >::type new_seq_; |
| |
| typedef pair<new_seq_,T> type; |
| }; |
| }; |
| |
| template< |
| typename Sequence |
| , typename Predicate |
| , typename Inserter |
| > |
| struct unique_impl |
| : first< typename fold< |
| Sequence |
| , pair< typename Inserter::state,na > |
| , protect< aux::unique_op<Predicate,typename Inserter::operation> > |
| >::type > |
| { |
| }; |
| |
| template< |
| typename Sequence |
| , typename Predicate |
| , typename Inserter |
| > |
| struct reverse_unique_impl |
| : first< typename reverse_fold< |
| Sequence |
| , pair< typename Inserter::state,na > |
| , protect< aux::unique_op<Predicate,typename Inserter::operation> > |
| >::type > |
| { |
| }; |
| |
| } // namespace aux |
| |
| BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, unique) |
| |
| }} |
| |
| #endif // BOOST_MPL_UNIQUE_HPP_INCLUDED |