def Dec.next
import bend-kit-runner@0.13.0.1/runner.bend as Runnerimport Base
636def Dec.next(-A: Type, -B: Type, m: Maybe<&1, Rd & A>, f: A -> Dec(B)) -> Maybe<&1, Rd & B>:
637 match m:
638 case None{}:
639 None{}
640 case Some{(r, x)}:
641 f(x)(r)