#![feature(generic_const_items, generic_const_exprs)] #![allow(incomplete_features)] // Ensure that we check if (makeshift) "evaluatable"-bounds on const items hold or not. const POSITIVE: usize = N where [(); N - 1]:; //~ ERROR evaluation of `POSITIVE::<0>::{constant#0}` failed fn main() { let _ = POSITIVE::<0>; }