diff options
Diffstat (limited to 'boost/container/detail/variadic_templates_tools.hpp')
| -rw-r--r-- | boost/container/detail/variadic_templates_tools.hpp | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/boost/container/detail/variadic_templates_tools.hpp b/boost/container/detail/variadic_templates_tools.hpp index f5101c577c..e9fa9cd15a 100644 --- a/boost/container/detail/variadic_templates_tools.hpp +++ b/boost/container/detail/variadic_templates_tools.hpp @@ -136,21 +136,25 @@ typename get_impl<I, tuple<Values...> >::const_type get(const tuple<Values...>& // in a function call. //////////////////////////////////////////////////// -template<std::size_t ... Indexes> -struct index_tuple{}; +template<std::size_t...> struct index_tuple{ typedef index_tuple type; }; -template<std::size_t Num, typename Tuple = index_tuple<> > -struct build_number_seq; +template<class S1, class S2> struct concat_index_tuple; -template<std::size_t Num, std::size_t ... Indexes> -struct build_number_seq<Num, index_tuple<Indexes...> > - : build_number_seq<Num - 1, index_tuple<Indexes..., sizeof...(Indexes)> > -{}; +template<std::size_t... I1, std::size_t... I2> +struct concat_index_tuple<index_tuple<I1...>, index_tuple<I2...>> + : index_tuple<I1..., (sizeof...(I1)+I2)...>{}; + +template<std::size_t N> struct build_number_seq; -template<std::size_t ... Indexes> -struct build_number_seq<0, index_tuple<Indexes...> > -{ typedef index_tuple<Indexes...> type; }; +template<std::size_t N> +struct build_number_seq + : concat_index_tuple<typename build_number_seq<N/2>::type + ,typename build_number_seq<N - N/2 >::type + >::type +{}; +template<> struct build_number_seq<0> : index_tuple<>{}; +template<> struct build_number_seq<1> : index_tuple<0>{}; }}} //namespace boost { namespace container { namespace container_detail { |