EricWF added inline comments. ================ Comment at: include/atomic:859 @@ +858,3 @@ +#if defined(__cpp_lib_atomic_is_always_lock_free) + static _LIBCPP_CONSTEXPR bool is_always_lock_free = __atomic_always_lock_free(sizeof(__a_), 0); +#endif ---------------- jfb wrote: > I don't think so: it's similar to `std::integral_constant<_Tp, __v>::value`. integral_constant::value has a definition on line 481 of type_traits.
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