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type_traits: fix empty pack indexing #387

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type_traits: fix empty pack indexing #387

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6 changes: 3 additions & 3 deletions include/stdx/type_traits.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -300,10 +300,10 @@ STDX_PRAGMA(diagnostic ignored "-Wc++26-extensions")
#endif
template <unsigned int N, typename... Ts>
using nth_t =
#if __cpp_pack_indexing >= 202311L
Ts...[N];
#elif __has_builtin(__type_pack_element)
#if __has_builtin(__type_pack_element)
__type_pack_element<N, Ts...>;
#elif __cpp_pack_indexing >= 202311L
Ts...[N];
#else
boost::mp11::mp_at_c<type_list<Ts...>, N>;
#endif
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