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std::atomic_ref<T>:: operator=

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std::atomic_ref
Member functions
atomic_ref::operator=
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Constants
value_type operator = ( value_type desired ) const noexcept ;
(1) (自 C++26 起为 constexpr)
atomic_ref & operator = ( const atomic_ref & ) = delete ;
(2)
1) 等价于 store ( desired ) ; return desired ; 。此重载仅当 std:: is_const_v < T > 为 false 时参与重载决议。
2) atomic_ref 不具备 CopyAssignable 特性。

目录

参数

期望值 - 待赋值的数值

返回值

如上所述。

注释

与大多数赋值运算符不同， atomic_ref 的赋值运算符不会返回其左侧参数的引用，而是返回所存储值的副本。

缺陷报告

下列行为变更缺陷报告被追溯应用于先前发布的 C++ 标准。

缺陷报告 适用范围 发布时的行为 正确行为
LWG 3508
( P3323R1 ) 		C++20 对 const T 的赋值运算符无意义 约束为仅接受非 const T

参见

构造 atomic_ref 对象
(公开成员函数)
以非原子参数原子地替换被引用对象的值
(公开成员函数)