Same as the preceding overload, comparing a shared_ptr to a weak_ptr.
Declared in <bslstl_ownerequal.h>
template<
class ELEMENT_TYPE_X,
class ELEMENT_TYPE_Y>
bool
operator()(
shared_ptr<ELEMENT_TYPE_X> const& x,
weak_ptr<ELEMENT_TYPE_Y> const& y) const noexcept;