def push_front

bend-collections@1.0.0.0 · src/containers/deque.bend:18

import Base

18def push_front(~T: Data, d: Deque<T>, x: T) -> Deque<T>:
19  DE{f, b, nf, nb} = d
20  DE{Con{x, f}, b, 1n+nf, nb}