diff options
Diffstat (limited to 'boost/fusion/adapted/boost_tuple/detail/build_cons.hpp')
-rw-r--r-- | boost/fusion/adapted/boost_tuple/detail/build_cons.hpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/boost/fusion/adapted/boost_tuple/detail/build_cons.hpp b/boost/fusion/adapted/boost_tuple/detail/build_cons.hpp new file mode 100644 index 0000000000..216fb0a614 --- /dev/null +++ b/boost/fusion/adapted/boost_tuple/detail/build_cons.hpp @@ -0,0 +1,59 @@ +/*============================================================================= + Copyright (c) 2012-2014 Kohei Takahashi + + 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_BUILD_CONS_10172012_0130) +#define BOOST_FUSION_BUILD_CONS_10172012_0130 + +#include <boost/tuple/tuple.hpp> +#include <boost/fusion/iterator/equal_to.hpp> +#include <boost/fusion/iterator/next.hpp> +#include <boost/fusion/iterator/value_of.hpp> +#include <boost/fusion/iterator/deref.hpp> + +namespace boost { namespace fusion { namespace detail +{ + template < + typename First + , typename Last + , bool is_empty = result_of::equal_to<First, Last>::value> + struct build_tuple_cons; + + template <typename First, typename Last> + struct build_tuple_cons<First, Last, true> + { + typedef boost::tuples::null_type type; + + BOOST_FUSION_GPU_ENABLED + static type + call(First const&, Last const&) + { + return type(); + } + }; + + template <typename First, typename Last> + struct build_tuple_cons<First, Last, false> + { + typedef + build_tuple_cons<typename result_of::next<First>::type, Last> + next_build_tuple_cons; + + typedef boost::tuples::cons< + typename result_of::value_of<First>::type + , typename next_build_tuple_cons::type> + type; + + BOOST_FUSION_GPU_ENABLED + static type + call(First const& f, Last const& l) + { + typename result_of::value_of<First>::type v = *f; + return type(v, next_build_tuple_cons::call(fusion::next(f), l)); + } + }; +}}} + +#endif |