def left_found
import bendtorch-core@0.1.0.0/src/autograd/tensor_backward.bend as TensorBackwardimport Base
1257def left_found(kind: Binary, +a: Nat, +b: Nat, pair: Found()) -> Tape & Result<&2, &2, Error, Nat>:
1258 (entries, left) = pair
1259 match left:
1260 case Fail{error}:
1261 (Tape{entries}, Fail{UnknownNode{}})
1262 case Done{left}:
1263 right_found(kind, a, b, left, value_counted(b, counted(entries)))