miniblog.

I'm trying to factor out the interior mutability in my Rust code. It's a little more verbose, but surprisingly readable. foo_old(&syntax); foo_new(&syntax, &mut change_map); Signatures are way more self-documenting with this approach.

You can go so far with simple data in Rust that it's kinda surprising when you start learning about interior mutability: https://doc.rust-lang.org/std/cell/index.html If you give a function a value of &T, they can actually mutate any cells within it. It's not sufficient to look for &mut T usages.

Which would you rather refactor: a codebase with immutable types but dynamic types, or pervasive mutability with static types, and why?