20 General utilities library [utilities]

20.8 Smart pointers [smartptr]

20.8.2 Shared-ownership pointers [util.smartptr] Class template shared_ptr [util.smartptr.shared] shared_ptr destructor [util.smartptr.shared.dest]



  • If *this is empty or shares ownership with another shared_ptr instance (use_count() > 1), there are no side effects.

  • Otherwise, if *this owns an object p and a deleter d, d(p) is called.

  • Otherwise, *this owns a pointer p, and delete p is called.

Note: Since the destruction of *this decreases the number of instances that share ownership with *this by one, after *this has been destroyed all shared_ptr instances that shared ownership with *this will report a use_count() that is one less than its previous value.  — end note ]