diff options
Diffstat (limited to 'libcxx/include/__fwd')
| -rw-r--r-- | libcxx/include/__fwd/tuple.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libcxx/include/__fwd/tuple.h b/libcxx/include/__fwd/tuple.h index 39ed94d9806e..dc96c03e2024 100644 --- a/libcxx/include/__fwd/tuple.h +++ b/libcxx/include/__fwd/tuple.h @@ -21,11 +21,20 @@ _LIBCPP_BEGIN_NAMESPACE_STD template <size_t, class> struct tuple_element; +template <size_t _Np, class _Tp> +using __tuple_element_t _LIBCPP_NODEBUG = typename tuple_element<_Np, _Tp>::type; + #ifndef _LIBCPP_CXX03_LANG template <class...> class tuple; +template <class> +inline const bool __is_tuple_v = false; + +template <class... _Tp> +inline const bool __is_tuple_v<tuple<_Tp...>> = true; + template <size_t _Ip, class... _Tp> struct tuple_element<_Ip, tuple<_Tp...> > { using type _LIBCPP_NODEBUG = __type_pack_element<_Ip, _Tp...>; |