def cat

bend-kit-regex@0.8.0.0 · regex.bend:403

import Base

403def cat(a: Node, b: Node) -> Node:
404  match a:
405    case NEmpty{}:
406      b
407    case _:
408      match b:
409        case NEmpty{}:
410          a
411        case _:
412          NCat{a, b}