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`std::promise::swap` Member Function

Exchange ownership of the asynchronous results associated with two std::promise objects.

void swap(promise& other);

Effects:: Exchange ownership of the asynchronous results associated with other and *this.
Postconditions:: The asynchronous result associated with other prior to the invocation of swap (if any) is associated with *this. The asynchronous result associated with *this prior to the invocation of swap (if any) is associated with other
Throws:: Nothing.

Header

#include <future>

See Also