forked from boostorg/mpl
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/remove_if.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_MPL_REMOVE_IF_HPP_INCLUDED
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#define BOOST_MPL_REMOVE_IF_HPP_INCLUDED
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#include "boost/mpl/fold_backward.hpp"
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#include "boost/mpl/clear.hpp"
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#include "boost/mpl/apply_if.hpp"
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#include "boost/mpl/push_front.hpp"
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#include "boost/mpl/identity.hpp"
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#include "boost/mpl/protect.hpp"
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#include "boost/mpl/lambda.hpp"
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#include "boost/mpl/aux_/void_spec.hpp"
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namespace boost {
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namespace mpl {
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namespace aux {
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template< typename Pred > struct remove_if_helper
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{
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template< typename Sequence, typename U > struct apply
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{
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typedef typename apply_if<
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typename apply1<Pred, U>::type
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, identity<Sequence>
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, push_front<Sequence,U>
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>::type type;
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};
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};
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} // namespace aux
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template<
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typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Sequence)
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, typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Predicate)
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>
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struct remove_if
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{
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private:
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typedef typename lambda<Predicate>::type pred_;
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public:
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typedef typename fold_backward<
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Sequence
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, typename clear<Sequence>::type
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, protect< aux::remove_if_helper<pred_> >
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>::type type;
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};
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BOOST_MPL_AUX_VOID_SPEC(2, remove_if)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_REMOVE_IF_HPP_INCLUDED
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