Announcing Rust 1.79.0 (
from to on 13 Jun 2024 17:24


threaded - newest on 13 Jun 2024 19:21 next collapse

How does the const { None } example type-inference work? The size of the option type can’t be known without knowing the type of the Somevariant.

Edit: aha, it doesn’t work as-is. It needs to infer the type of elements of foo from usage.… on 14 Jun 2024 13:25 collapse

I don’t understand what the advantages of const expressions are.

Isn’t const { None } the same as just None? on 14 Jun 2024 13:38 collapse

const expressions are evaluated at compile time and can be used in locations where you would have to otherwise specify a literal (or something that amounts to a named literal like a const value).