std::atomic_ref<T>::store

void store( value_type desired,
            std::memory_order order =
                std::memory_order_seq_cst ) const noexcept;

(constexpr since C++26)

Atomically replaces the current value of the referenced object with desired. Memory is affected according to the value of order.

This overload participates in overload resolution only if std::is_const_v<T> is false.

If order is not std::memory_order_relaxed, std::memory_order_release or std::memory_order_seq_cst, the behavior is undefined.

desired	-	the value to store into the referenced object
order	-	memory order constraints to enforce

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 3508 (P3323R1)	C++20	`store` was meaningless for constT	constrained to accept only non-const `T`