T exchange( T desired, std::memory_order order = std::memory_order_seq_cst ) const noexcept; | (since C++20) |
Atomically replaces the value of the referenced object with desired. The operation is a read-modify-write operation. Memory is affected according to the value of order.
| desired | - | value to assign |
| order | - | memory order constraints to enforce |
The value of the referenced object before the call.
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