changeset 37185 | 64da21a2c6c7 |
parent 37072 | 9105c8237c7a |
child 38368 | 07bc80bdeebc |
--- a/src/Pure/General/linear_set.scala Sat May 29 16:44:44 2010 +0200 +++ b/src/Pure/General/linear_set.scala Sat May 29 17:26:02 2010 +0200 @@ -103,7 +103,9 @@ } def append_after(hook: Option[A], elems: Seq[A]): Linear_Set[A] = - (elems :\ this)((elem, set) => set.insert_after(hook, elem)) + ((hook, this) /: elems) { + case ((last_elem, set), elem) => (Some(elem), set.insert_after(last_elem, elem)) + }._2 def delete_between(from: Option[A], to: Option[A]): Linear_Set[A] = {