std::future Move Assignment Operator

Transfer ownership of the asynchronous result associated with the one std::future object to another.

future(future&& other);

Effects:: Transfers ownership of an asynchronous state between std::future instances.
Postconditions:: The asynchronous result associated with other prior to the invocation of the constructor is associated with *this. other has no associated asynchronous result. The ownership of the asynchronous state (if any) associated with *this prior to the call is released, and the state destroyed if this is the last reference. this->valid() returns the same value that other.valid() returned before the invocation of this constructor. other.valid() returns false.
Throws:: Nothing.

#include <future>

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