I discovered, this week, that there’s a way of explicitly marking unreachable code in Rust, without needing to resort to something like panic!("This should be unreachable"). Namely: the unreachable macro. When hit, it panics, because would-be unreachable code being actually reachable is panic-worthy; it has no functional difference from a normal panic statement. But it makes the code a bit more readable, and as such I’m happy to have discovered it.

Tags: Rust