< cpp‎ | atomic‎ | atomic ref
static constexpr bool is_always_lock_free = /*implementation-defined*/;
(since C++20)

Equals true if this operations on this atomic_ref type is always lock-free and false if it is never or sometimes lock-free.

The value of this constant is consistent with the result of member function is_lock_free.

See also

checks if the atomic_ref object is lock-free
(public member function)