20 General utilities library [utilities]

20.11 Smart pointers [smartptr]

20.11.1 Class template unique_­ptr [unique.ptr] unique_­ptr for single objects [unique.ptr.single] Destructor [unique.ptr.single.dtor]

Requires: The expression get_­deleter()(get()) shall be well-formed, shall have well-defined behavior, and shall not throw exceptions.
The use of default_­delete requires T to be a complete type.
end note
Effects: If get() == nullptr there are no effects.
Otherwise get_­deleter()(get()).