It's probably not the most idiomatic thing, but in Rust you can write: let foo = match () { _ if x <= 0 => 0, _ if something_else > 50 => 9

It's probably not the most idiomatic thing, but in Rust you can write: let foo = match () { _ if x <= 0 => 0, _ if something_else > 50 => 9000, _ => 42, };