73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
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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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// $Id: max_element.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/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
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