epoc32/include/stdapis/boost/mpl/iter_fold_if.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
changeset 4 837f303aceeb
permissions -rw-r--r--
Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
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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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// $Source: /cvsroot/boost/boost/boost/mpl/iter_fold_if.hpp,v $
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// $Date: 2004/09/02 15:40:41 $
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// $Revision: 1.7 $
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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