[pcwalton]

There's little benefit to doing so. Because weak_ptr points to a shared_ptr, you are still paying the overhead of the reference counting either way. You might as well just use shared_ptr and have a destructor that unlinks every element from the list.

weak_ptr is basically for managing leaks, not for avoiding reference count overhead. Leaks aren't the problem in a doubly-linked list, however.

[pjmlp]

Thanks for jumping in. Yeah I guess it makes sense.

It just got me thinking into having some kind of data structure examples in Rust as side project, after 1.0 availability.

Now just have to find time for it.