std::atomic_ref<T>::operator&=,|=,^=
T is an integral type other than cv boolAtomically replaces the current value of the referenced object with the result of computation involving the previous value and arg. These operations are read-modify-write operations.
- operator&= performs atomic bitwise AND. Equivalent to return fetch_and(arg) & arg;.
- operator!= performs atomic bitwise OR. Equivalent to return fetch_or(arg) | arg;.
- operator^= performs atomic bitwise XOR. Equivalent to return fetch_xor(arg) ^ arg;.
These overloads participate in overload resolution only if std::is_const_v <T> is false.
[edit] Parameters
[edit] Return value
The resulting value (that is, the result of applying the corresponding binary operator to the value immediately preceding the effects of the corresponding member function).
[edit] Notes
Unlike most compound assignment operators, the compound assignment operators for atomic_ref do not return a reference to their left-hand arguments. They return a copy of the stored value instead.
[edit] Example
Reason: no example
[edit] Defect reports
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 | compound assignment operators were meaningless for const T | constrained to accept only non-const T
|
[edit] See also
(public member function) [edit]
(public member function) [edit]
(public member function) [edit]