def un.bit_le
import bend-osdev-u32@0.1.0.0/PROOF.bend as PROOFimport Base
import bend-osdev-u32@0.1.0.0/u32.bend as U
1507def un.bit_le(b: Bool) -> {Nat.is_le(U.U32Nat.bit(b), 1n) == True{} : Bool}:
1508 match b:
1509 case True{}:
1510 {==}
1511 case False{}:
1512 {==}