def Bool.pick
import Base614def Bool.pick(-A: Type, c: Bool, a: A, b: A) -> A:
615 match c:
616 case False{}:
617 b
618 case True{}:
619 a
import Base614def Bool.pick(-A: Type, c: Bool, a: A, b: A) -> A:
615 match c:
616 case False{}:
617 b
618 case True{}:
619 a