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72 lines
1.5 KiB
72 lines
1.5 KiB
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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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// $Id$ |
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// $Date$ |
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// $Revision$ |
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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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