def sub_if
import bend-collections-laws-math@1.0.0.0/src/math/w64.bend as W64import Base
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as W
588def sub_if(+r: W.U64, +m: W.U64, big: Bool) -> W.U64:
589 match big:
590 case True{}:
591 sub(r, m)
592 case False{}:
593 r