def FR
import bend-collections-laws-math@1.0.0.0/proofs/math/typed/u64int.bend as U64intimport Base
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as WU
732# the value when the flag says it fits
733def FR(ok: Bool, a: WU.U64, x: Nat) -> Type:
734 match ok:
735 case True{}:
736 {v(a) == x : Nat}
737 case False{}:
738 {x == x : Nat}