On: Vale's first prototype for immutable region borrowing

[Buttons840]

I didn't understand that blog post very well, but it made me think of "generational arenas"[0], and I'm curious how they compare? Generational arenas sound similar because they involve passing an index around instead of a pointer, are designed to handle many small self referencing "objects", and are popular in games, so in my mind they seemed similar.

[0]: https://docs.rs/generational-arena/latest/generational_arena...

[sirwhinesalot → Buttons840]

Same idea but applied to the whole program and with compiler optimizations to avoid redundant generation checks.