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117 lines
3.1 KiB
117 lines
3.1 KiB
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#ifndef BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED |
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#define BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2003-2004 |
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// Copyright Eric Friedman 2003 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: iter_fold_if.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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#include <boost/mpl/begin_end.hpp> |
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#include <boost/mpl/logical.hpp> |
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#include <boost/mpl/always.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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#include <boost/mpl/if.hpp> |
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#include <boost/mpl/pair.hpp> |
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#include <boost/mpl/apply.hpp> |
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#include <boost/mpl/aux_/iter_fold_if_impl.hpp> |
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#include <boost/mpl/aux_/na_spec.hpp> |
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#include <boost/mpl/aux_/lambda_support.hpp> |
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#include <boost/mpl/aux_/config/forwarding.hpp> |
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#include <boost/mpl/aux_/config/workaround.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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namespace boost { namespace mpl { |
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namespace aux { |
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template< typename Predicate, typename LastIterator > |
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struct iter_fold_if_pred |
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{ |
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template< typename State, typename Iterator > struct apply |
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#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
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: and_< |
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not_< is_same<Iterator,LastIterator> > |
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, apply1<Predicate,Iterator> |
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> |
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{ |
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#else |
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{ |
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typedef and_< |
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not_< is_same<Iterator,LastIterator> > |
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, apply1<Predicate,Iterator> |
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> type; |
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#endif |
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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_NA_PARAM(Sequence) |
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, typename BOOST_MPL_AUX_NA_PARAM(State) |
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, typename BOOST_MPL_AUX_NA_PARAM(ForwardOp) |
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, typename BOOST_MPL_AUX_NA_PARAM(ForwardPredicate) |
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, typename BOOST_MPL_AUX_NA_PARAM(BackwardOp) |
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, typename BOOST_MPL_AUX_NA_PARAM(BackwardPredicate) |
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> |
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struct iter_fold_if |
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{ |
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typedef typename begin<Sequence>::type first_; |
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typedef typename end<Sequence>::type last_; |
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typedef typename eval_if< |
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is_na<BackwardPredicate> |
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, if_< is_na<BackwardOp>, always<false_>, always<true_> > |
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, identity<BackwardPredicate> |
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>::type backward_pred_; |
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// cwpro8 doesn't like 'cut-off' type here (use typedef instead) |
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#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) && !BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) |
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struct result_ : |
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#else |
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typedef |
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#endif |
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aux::iter_fold_if_impl< |
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first_ |
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, State |
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, ForwardOp |
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, protect< aux::iter_fold_if_pred< ForwardPredicate,last_ > > |
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, BackwardOp |
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, backward_pred_ |
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> |
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#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) && !BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) |
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{ }; |
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#else |
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result_; |
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#endif |
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public: |
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typedef pair< |
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typename result_::state |
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, typename result_::iterator |
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> type; |
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BOOST_MPL_AUX_LAMBDA_SUPPORT( |
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6 |
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, iter_fold_if |
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, (Sequence,State,ForwardOp,ForwardPredicate,BackwardOp,BackwardPredicate) |
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) |
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}; |
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BOOST_MPL_AUX_NA_SPEC(6, iter_fold_if) |
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}} |
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#endif // BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED
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