The perils of pinning

It's double-linked list in Linus's good taste.

The idea is that there are never any NULL pointers and thus never need to deal with them.

And, of course, when you convert that data structure to Rust you want to keep that property… and you couldn't! Rust doesn't have any constructors and structures are created in one place (on stack) and then are moved into proper position.

This was never a problem for new Rust code, but it's very often quite awkward.

And indeed, language-level solution would be great. But before it can be implemented it first needs to be imagined and it's not that easy here.