forked from boostorg/fusion
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*=============================================================================
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Copyright (c) 2005-2012 Joel de Guzman
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Copyright (c) 2005-2006 Dan Marsden
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_FUSION_DEQUE_BEGIN_IMPL_09122006_2034)
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#define BOOST_FUSION_DEQUE_BEGIN_IMPL_09122006_2034
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#include <boost/fusion/container/deque/deque_iterator.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/mpl/if.hpp>
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namespace boost { namespace fusion
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{
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struct deque_tag;
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namespace extension
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{
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template<typename T>
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struct begin_impl;
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template<>
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struct begin_impl<deque_tag>
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{
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template<typename Sequence>
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struct apply
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{
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typedef typename
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mpl::if_c<
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(Sequence::next_down::value == Sequence::next_up::value)
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, deque_iterator<Sequence, 0>
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, deque_iterator<Sequence, (Sequence::next_down::value + 1)>
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>::type
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type;
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static type call(Sequence& seq)
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{
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return type(seq);
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}
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};
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};
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}
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}}
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#endif
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