def rows.at
import gralha-coverage@0.1.0.1/cover.bend as Coverimport Base
import gralha-text-scan@0.1.0.1/scan.bend as U
46def rows.at(rows: List<&2, List<&2, Run>>, +y: U32, +x: U32) -> F32:
47 match rows:
48 case Nil{}: 0.0
49 case Con{r, rest}: U.choose(F32, U32.is_eq(y, 0), runs.at(r, x), rows.at(rest, (y - 1 : U32), x))