def pop_len_at

bend-collections@1.0.0.0 · src/containers/dynamic_array.bend:373

import Base
import bend-collections@1.0.0.0/src/containers/types/dynamic_array.bend as E

373def pop_len_at(~T: Data, limit: Nat, depth: Nat, +cap: Nat, len: Nat, arr: Array<Maybe<&2, T>>) -> DynArray<&2, T> & Result<&2, &2, E.Error, T>:
374  match len:
375    case 0n:
376      (DA{limit, depth, cap, 0n, arr}, Fail{E.EmptyArray{}})
377    case 1n+ +m:
378      pop_found(T, limit, depth, cap, m, Array.swap(Maybe<&2, T>, arr, U32.from_nat(m), None{}))