86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
|
|
#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: 2008-10-10 23:19:02 -0700 (Fri, 10 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
|