Move-assign a basic_waitable_timer
from another.
basic_waitable_timer & operator=( basic_waitable_timer && other);
This assignment operator moves a timer from one object to another. Cancels any outstanding asynchronous operations associated with the target object.
The other basic_waitable_timer
object
from which the move will occur.
Following the move, the moved-from object is in the same state as if
constructed using the basic_waitable_timer(const executor_type&)
constructor.