diff options
Diffstat (limited to 'indra/llcommon')
| -rw-r--r-- | indra/llcommon/apply.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/indra/llcommon/apply.h b/indra/llcommon/apply.h index 0009dd1f80..cf6161ed50 100644 --- a/indra/llcommon/apply.h +++ b/indra/llcommon/apply.h @@ -93,7 +93,14 @@ auto invoke(Fn&& f, Args&&... args) #if __cpp_lib_apply >= 201603L // C++17 implementation -using std::apply; +// We don't just say 'using std::apply;' because that template is too general: +// it also picks up the apply(function, vector) case, which we want to handle +// below. +template <typename CALLABLE, typename... ARGS> +auto apply(CALLABLE&& func, const std::tuple<ARGS...>& args) +{ + return std::apply(std::forward<CALLABLE>(func), args); +} #else // C++14 @@ -124,6 +131,8 @@ auto apply(CALLABLE&& func, const std::tuple<ARGS...>& args) std::index_sequence_for<ARGS...>{}); } +#endif // C++14 + // per https://stackoverflow.com/a/57510428/5533635 template <typename CALLABLE, typename T, size_t SIZE> auto apply(CALLABLE&& func, const std::array<T, SIZE>& args) @@ -131,8 +140,6 @@ auto apply(CALLABLE&& func, const std::array<T, SIZE>& args) return apply(std::forward<CALLABLE>(func), std::tuple_cat(args)); } -#endif // C++14 - /***************************************************************************** * bind_front() *****************************************************************************/ |