| /*============================================================================= |
| Copyright (c) 2001-2006 Joel de Guzman |
| Copyright (c) 2005-2006 Dan Marsden |
| |
| 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) |
| ==============================================================================*/ |
| #if !defined(BOOST_FUSION_DEQUE_BEGIN_IMPL_09122006_2034) |
| #define BOOST_FUSION_DEQUE_BEGIN_IMPL_09122006_2034 |
| |
| #include <boost/fusion/container/deque/deque_iterator.hpp> |
| |
| #include <boost/mpl/equal_to.hpp> |
| #include <boost/mpl/if.hpp> |
| |
| namespace boost { namespace fusion { |
| |
| struct deque_tag; |
| |
| namespace extension |
| { |
| template<typename T> |
| struct begin_impl; |
| |
| template<> |
| struct begin_impl<deque_tag> |
| { |
| template<typename Sequence> |
| struct apply |
| { |
| typedef typename mpl::if_< |
| mpl::equal_to<typename Sequence::next_down, typename Sequence::next_up>, |
| deque_iterator<Sequence, 0>, |
| deque_iterator< |
| Sequence, mpl::plus<typename Sequence::next_down, mpl::int_<1> >::value> >::type type; |
| |
| static type call(Sequence& seq) |
| { |
| return type(seq); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |