63e88f80
 Hu Chunming
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#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.
// $Id$
// $Date$
// $Revision$
#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
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