#ifndef BOOST_MPL_REMOVE_IF_HPP_INCLUDED

#define BOOST_MPL_REMOVE_IF_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2000-2004

// Copyright David Abrahams 2003-2004

//

// 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: remove_if.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/identity.hpp>

#include <boost/mpl/protect.hpp>

#include <boost/mpl/lambda.hpp>

#include <boost/mpl/apply.hpp>

#include <boost/mpl/aux_/inserter_algorithm.hpp>

namespace boost { namespace mpl {

namespace aux {

template< typename Pred, typename InsertOp > struct remove_if_helper

{

    template< typename Sequence, typename U > struct apply

    {

        typedef typename eval_if<

              typename apply1<Pred,U>::type

            , identity<Sequence>

            , apply2<InsertOp,Sequence,U>

            >::type type;

    };

};

template<

      typename Sequence

    , typename Predicate

    , typename Inserter

    >

struct remove_if_impl

    : fold<

          Sequence

        , typename Inserter::state

        , protect< aux::remove_if_helper<

              typename lambda<Predicate>::type

            , typename Inserter::operation

            > >

        >

{

};

template<

      typename Sequence

    , typename Predicate

    , typename Inserter

    >

struct reverse_remove_if_impl

    : reverse_fold<

          Sequence

        , typename Inserter::state

        , protect< aux::remove_if_helper<

              typename lambda<Predicate>::type

            , typename Inserter::operation

            > >

        >

{

};

} // namespace aux

BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, remove_if)

}}

#endif // BOOST_MPL_REMOVE_IF_HPP_INCLUDED