boost/mpl/max_element.hpp
//-----------------------------------------------------------------------------
// boost mpl/max_element.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2000-02
// Aleksey Gurtovoy
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appears in all copies and
// that both the copyright notice and this permission notice appear in
// supporting documentation. No representations are made about the
// suitability of this software for any purpose. It is provided "as is"
// without express or implied warranty.
#ifndef BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED
#define BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED
#include "boost/mpl/less.hpp"
#include "boost/mpl/iter_fold.hpp"
#include "boost/mpl/begin_end.hpp"
#include "boost/mpl/if.hpp"
#include "boost/mpl/apply.hpp"
#include "boost/mpl/lambda.hpp"
#include "boost/mpl/aux_/common_name_wknd.hpp"
#include "boost/mpl/aux_/void_spec.hpp"
namespace boost {
namespace mpl {
BOOST_MPL_AUX_COMMON_NAME_WKND(max_element)
namespace aux {
template< typename Predicate >
struct select_max
{
template< typename OldIterator, typename Iterator >
struct apply
{
typedef typename apply2<
Predicate
, typename OldIterator::type
, typename Iterator::type
>::type condition_;
typedef typename if_<
condition_
, Iterator
, OldIterator
>::type type;
};
};
} // namespace aux
BOOST_MPL_AUX_AGLORITHM_NAMESPACE_BEGIN
template<
typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Sequence)
, typename Predicate = less<_,_>
>
struct max_element
{
private:
typedef typename lambda<Predicate>::type pred_;
public:
typedef typename iter_fold<
Sequence
, typename begin<Sequence>::type
, protect< aux::select_max<pred_> >
>::type type;
};
BOOST_MPL_AUX_AGLORITHM_NAMESPACE_END
BOOST_MPL_AUX_ALGORITHM_VOID_SPEC(1, max_element)
} // namespace mpl
} // namespace boost
#endif // BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED