std::experimental::observer_ptr<W>::reset
Min standard notice:
Set *this to watch the object pointed to by p. get() returns p after the call.
# Declarations
constexpr void reset( element_type* p = nullptr ) noexcept;
(library fundamentals TS v2)
# Parameters
ptr: pointer to a new object to watch
# Example
This section is incompleteReason: no example