IList<A>.from constructor

IList<A>.from(Iterable<A> iterable)

Implementation

factory IList.from(Iterable<A> iterable) {
  final IList<A> aNil = nil();
  final Iterator<A> it = iterable.iterator;
  if (!it.moveNext()) {
    return aNil;
  }
  Cons<A> result = new Cons(it.current, aNil);
  final IList<A> resultHead = result;
  while(it.moveNext()) {
    final next = new Cons(it.current, aNil);
    result._unsafeSetTail(next);
    result = next;
  }
  return resultHead;
}