type Step
import gralha-coverage@0.1.0.1/cover.bend as Coverimport Base
358# One scanline: walk the ascending list, emit the inside spans' events, and
359# build the descending list for the next scanline sy2.
360type Step is Data:
361 Step{events: List<&2, CovEv>, next: List<&2, Act>}
362
363@unsafe