forked from boostorg/fusion
141 lines
4.3 KiB
C++
141 lines
4.3 KiB
C++
/*=============================================================================
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Copyright (c) 2005-2013 Joel de Guzman
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Copyright (c) 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(FUSION_CONVERT_20061213_2207)
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#define FUSION_CONVERT_20061213_2207
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#include <boost/fusion/container/deque/detail/convert_impl.hpp>
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#include <boost/fusion/container/deque/deque.hpp>
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#if defined(BOOST_FUSION_HAS_VARIADIC_DEQUE)
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#include <boost/fusion/iterator/equal_to.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/value_of.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/container/deque/front_extended_deque.hpp>
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///////////////////////////////////////////////////////////////////////////////
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// C++11 variadic implementation
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace fusion
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{
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namespace detail
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{
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template <typename First, typename Last
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, bool is_empty = result_of::equal_to<First, Last>::value>
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struct build_deque;
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template <typename First, typename Last>
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struct build_deque<First, Last, true>
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{
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typedef deque<> type;
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static type
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call(First const&, Last const&)
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{
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return type();
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}
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};
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template <typename First, typename Last>
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struct build_deque<First, Last, false>
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{
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typedef
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build_deque<typename result_of::next<First>::type, Last>
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next_build_deque;
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typedef front_extended_deque<
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typename next_build_deque::type
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, typename result_of::value_of<First>::type>
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type;
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static type
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call(First const& f, Last const& l)
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{
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typename result_of::value_of<First>::type v = *f;
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return type(next_build_deque::call(fusion::next(f), l), v);
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}
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};
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}
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namespace result_of
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{
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template <typename Sequence>
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struct as_deque :
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detail::build_deque<
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typename result_of::begin<Sequence>::type
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, typename result_of::end<Sequence>::type
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>
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{
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};
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}
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template <typename Sequence>
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inline typename result_of::as_deque<Sequence>::type
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as_deque(Sequence& seq)
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{
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typedef typename result_of::as_deque<Sequence>::gen gen;
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return gen::call(fusion::begin(seq), fusion::end(seq));
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}
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template <typename Sequence>
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inline typename result_of::as_deque<Sequence const>::type
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as_deque(Sequence const& seq)
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{
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typedef typename result_of::as_deque<Sequence const>::gen gen;
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return gen::call(fusion::begin(seq), fusion::end(seq));
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}
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}}
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#else
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///////////////////////////////////////////////////////////////////////////////
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// C++03 (non-variadic) implementation
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/size.hpp>
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#include <boost/fusion/container/deque/detail/pp_as_deque.hpp>
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namespace boost { namespace fusion
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{
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namespace result_of
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{
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template <typename Sequence>
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struct as_deque
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{
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typedef typename
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detail::as_deque<result_of::size<Sequence>::value>
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gen;
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typedef typename gen::
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template apply<typename result_of::begin<Sequence>::type>::type
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type;
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};
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}
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template <typename Sequence>
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inline typename result_of::as_deque<Sequence>::type
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as_deque(Sequence& seq)
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{
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typedef typename result_of::as_deque<Sequence>::gen gen;
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return gen::call(fusion::begin(seq));
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}
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template <typename Sequence>
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inline typename result_of::as_deque<Sequence const>::type
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as_deque(Sequence const& seq)
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{
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typedef typename result_of::as_deque<Sequence const>::gen gen;
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return gen::call(fusion::begin(seq));
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}
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}}
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#endif
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#endif
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