| |
| #ifndef BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED |
| #define BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED |
| |
| // Copyright Aleksey Gurtovoy 2000-2004 |
| // |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/mpl for documentation. |
| |
| // $Id: max_element.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
| // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
| // $Revision: 49267 $ |
| |
| #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/deref.hpp> |
| #include <boost/mpl/apply.hpp> |
| #include <boost/mpl/aux_/common_name_wknd.hpp> |
| #include <boost/mpl/aux_/na_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 deref<OldIterator>::type |
| , typename deref<Iterator>::type |
| >::type condition_; |
| |
| typedef typename if_< |
| condition_ |
| , Iterator |
| , OldIterator |
| >::type type; |
| }; |
| }; |
| |
| } // namespace aux |
| |
| |
| template< |
| typename BOOST_MPL_AUX_NA_PARAM(Sequence) |
| , typename Predicate = less<_,_> |
| > |
| struct max_element |
| : iter_fold< |
| Sequence |
| , typename begin<Sequence>::type |
| , protect< aux::select_max<Predicate> > |
| > |
| { |
| }; |
| |
| BOOST_MPL_AUX_NA_SPEC(1, max_element) |
| |
| }} |
| |
| #endif // BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED |