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Diffstat (limited to 'src/third_party/boost-1.69.0/boost/fusion/view/joint_view/detail/next_impl.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/fusion/view/joint_view/detail/next_impl.hpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/fusion/view/joint_view/detail/next_impl.hpp b/src/third_party/boost-1.69.0/boost/fusion/view/joint_view/detail/next_impl.hpp new file mode 100644 index 00000000000..a7d18757da6 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/fusion/view/joint_view/detail/next_impl.hpp @@ -0,0 +1,75 @@ +/*============================================================================= + Copyright (c) 2001-2011 Joel de Guzman + + 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(FUSION_NEXT_IMPL_07162005_0136) +#define FUSION_NEXT_IMPL_07162005_0136 + +#include <boost/fusion/support/config.hpp> +#include <boost/fusion/iterator/next.hpp> +#include <boost/fusion/iterator/equal_to.hpp> +#include <boost/mpl/if.hpp> + +namespace boost { namespace fusion +{ + struct joint_view_iterator_tag; + + template <typename Category, typename First, typename Last, typename Concat> + struct joint_view_iterator; + + namespace extension + { + template <typename Tag> + struct next_impl; + + template <> + struct next_impl<joint_view_iterator_tag> + { + template <typename Iterator> + struct apply + { + typedef typename Iterator::first_type first_type; + typedef typename Iterator::last_type last_type; + typedef typename Iterator::concat_type concat_type; + typedef typename Iterator::category category; + typedef typename result_of::next<first_type>::type next_type; + typedef result_of::equal_to<next_type, last_type> equal_to; + + typedef typename + mpl::if_< + equal_to + , concat_type + , joint_view_iterator<category, next_type, last_type, concat_type> + >::type + type; + + BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED + static type + call(Iterator const& i, mpl::true_) + { + return i.concat; + } + + BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED + static type + call(Iterator const& i, mpl::false_) + { + return type(fusion::next(i.first), i.concat); + } + + BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED + static type + call(Iterator const& i) + { + return call(i, equal_to()); + } + }; + }; + } +}} + +#endif + + |