def add_left
import bend-visgraph@2.0.0.0/visgraph.bend as Visgraphimport Base
170def add_left(seen: Bool, +dir: Direction, +k: Weight, +lo: F32, +hi: F32, ia: U32, ib: U32, xa: F32, xb: F32, ya: F32, yb: F32, s: F32, es: Edges) -> Edges:
171 match seen:
172 case True{}:
173 add_left_dir(dir, k, lo, hi, ia, ib, xa, xb, ya, yb, s, es)
174 case False{}:
175 es