20 General utilities library [utilities]

20.11 Smart pointers [smartptr]

20.11.2 Shared-ownership pointers [util.sharedptr]

20.11.2.3 Class template weak_­ptr [util.smartptr.weak]

20.11.2.3.3 Destructor [util.smartptr.weak.dest]

~weak_ptr();
Effects: Destroys this weak_­ptr object but has no effect on the object its stored pointer points to.