def rev.build
import bend-kit-regex@0.8.0.0/regex.bend as Regeximport Base
942def rev.build(m: Maybe<&2, Node>) -> Maybe<&2, Bits>:
943 match m:
944 case None{}:
945 None{}
946 case Some{node}:
947 +insts = emit(reverse.node(node), 0, [IMatch{}])
948 +fuel = Nat.add(Nat.mul(3n, List.length(&2, Inst, insts)), 2n)
949 bits(fuel, insts)