forked from boostorg/mpl
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/max_element.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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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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#include "boost/mpl/comparison/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/apply.hpp"
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#include "boost/mpl/lambda.hpp"
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#include "boost/mpl/aux_/void_spec.hpp"
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namespace boost {
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namespace mpl {
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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 OldIterator::type
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, typename 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_VOID_SPEC_PARAM(Sequence)
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, typename Predicate = less<_,_>
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>
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struct max_element
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{
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private:
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typedef typename lambda<Predicate>::type pred_;
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public:
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typedef typename iter_fold<
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Sequence
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, typename begin<Sequence>::type
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, protect< aux::select_max<pred_> >
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>::type type;
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};
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BOOST_MPL_AUX_VOID_SPEC(1, max_element)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED
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