std::experimental::observer_ptr::reset

From cppreference.com
constexpr void reset(element_type* p = nullptr) noexcept;
(library fundamentals TS v2)

Set *this to watch the object pointed to by p. get() returns p after the call.

Parameters

ptr - pointer to a new object to watch

Example

See also

returns a pointer to the watched object and stops watching the object
(public member function)