3 ms·

Can you use lifetimes for most objects, and use GC where it's "hard"? Like, canonical example with double linked lists.

• rtoway 5y ago
  You can do this in Rust today, with the standard library's reference counter
  • klodolph 5y ago
    Also, one of the easiest ways to leak memory in Rust. My understanding is that substructural typing systems are just not quite powerful enough to represent the semantics of double-linked lists, but I don't understand the math myself. Obviously it won't leak memory if you do it correctly, but Rust will happily let you leak memory in an Rc<T>.
    • ThomasWinwood 5y ago
      If you really do want to leak memory, Rc<T> is overcomplicated - just call `Box::leak` and throw away the output.
      • klodolph 5y ago
        Rc<T> is the preferred way to introduce unintentional memory leaks.