os/ossrv/ossrv_pub/boost_apis/boost/mpl/max_element.hpp
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution.
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#ifndef BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED
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#define BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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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/max_element.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/less.hpp>
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#include <boost/mpl/iter_fold.hpp>
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#include <boost/mpl/begin_end.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/deref.hpp>
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#include <boost/mpl/apply.hpp>
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#include <boost/mpl/aux_/common_name_wknd.hpp>
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#include <boost/mpl/aux_/na_spec.hpp>
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namespace boost { namespace mpl {
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BOOST_MPL_AUX_COMMON_NAME_WKND(max_element)
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namespace aux {
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template< typename Predicate >
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struct select_max
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{
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    template< typename OldIterator, typename Iterator >
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    struct apply
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    {
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        typedef typename apply2<
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              Predicate
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            , typename deref<OldIterator>::type
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            , typename deref<Iterator>::type
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            >::type condition_;
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        typedef typename if_<
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              condition_
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            , Iterator
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            , OldIterator
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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_NA_PARAM(Sequence)
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    , typename Predicate = less<_,_>
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    >
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struct max_element
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    : iter_fold<
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          Sequence
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        , typename begin<Sequence>::type
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        , protect< aux::select_max<Predicate> >
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        >
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{
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};
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BOOST_MPL_AUX_NA_SPEC(1, max_element)
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}}
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#endif // BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED