miniblog.

I've realised that my favourite side projects all have fiddly bits. It's really nice to have small features that you can add or debug in a few minutes.

Today I learnt that Cell<T> has the size of a pointer (i.e. probably 64 bits) in Rust, regardless of the size of T. It's a common pattern for making struct fields mutable, but the T isn't actually stored inside the struct.

"What do you call a pointer we stole the high bits off? An ointer." https://docs.rs/ointers/latest/ointers/ Brilliant name for a pointer tagging library.