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std::atomic_ref<T>:: operator=

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std::atomic_ref
Member functions
atomic_ref::operator=
(C++26)
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Constants
value_type operator = ( value_type desired ) const noexcept ;
(1) (constexpr since C++26)
atomic_ref & operator = ( const atomic_ref & ) = delete ;
(2)
1) Equivalent to store ( desired ) ; return desired ; . This overload participates in overload resolution only if std:: is_const_v < T > is false .
2) atomic_ref is not CopyAssignable .

Contents

Parameters

desired - value to assign

Return value

As described above.

Notes

Unlike most assignment operators, the assignment operator for atomic_ref does not return a reference to its left-hand argument. It returns a copy of the stored value instead.

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 assignment operator was meaningless for const T constrained to accept only non-const T

See also

constructs an atomic_ref object
(public member function)
atomically replaces the value of the referenced object with a non-atomic argument
(public member function)