def Deque.push_front

bend-kit-collections@0.1.4.1 · deque.bend:20

import Base

20def Deque.push_front(a, -A: Kind(a), x: A, d: Deque<a, A>) -> Deque<a, A>:
21  match d:
22    case Deq{f, b}:
23      Deq{x <> f, b}