1 files changed, 0 insertions, 62 deletions
diff --git a/aoc2023/src/utilities/prioqueue.gleam b/aoc2023/src/utilities/prioqueue.gleam
deleted file mode 100644
index 640748b..0000000
--- a/aoc2023/src/utilities/prioqueue.gleam
+++ /dev/null
@@ -1,62 +0,0 @@
-//adapted from https://github.com/byronanderson/adventofcode2021/blob/main/gleam_advent/src/priority_queue.gleam
-
-import gleam/dict.{type Dict}
-
-type Ref
-
-@external(erlang, "erlang", "make_ref")
-fn make_ref() -> Ref
-
-type PQueue(a)
-
-pub opaque type PriorityQueue(a) {
-  PriorityQueue(queue: PQueue(#(a, Ref)), refs: Dict(a, Ref))
-}
-
-type OutResult(a) {
-  Empty
-  Value(a, Int)
-}
-
-@external(erlang, "pqueue2", "new")
-fn new_() -> PQueue(a)
-
-@external(erlang, "pqueue2", "in")
-fn insert_(item: a, prio: Int, queue: PQueue(a)) -> PQueue(a)
-
-@external(erlang, "pqueue2", "pout")
-fn pop_(queue: PQueue(a)) -> #(OutResult(a), PQueue(a))
-
-pub fn new() -> PriorityQueue(a) {
-  PriorityQueue(queue: new_(), refs: dict.new())
-}
-
-pub fn insert(
-  queue: PriorityQueue(a),
-  value: a,
-  priority: Int,
-) -> PriorityQueue(a) {
-  let ref = make_ref()
-
-  let refs =
-    queue.refs
-    |> dict.insert(value, ref)
-
-  PriorityQueue(refs: refs, queue: insert_(#(value, ref), priority, queue.queue),
-  )
-}
-
-pub fn pop(queue: PriorityQueue(a)) -> Result(#(a, PriorityQueue(a)), Nil) {
-  case pop_(queue.queue) {
-    #(Value(#(value, ref), _priority), pqueue) -> {
-      let assert Ok(recently_enqueued_ref) = dict.get(queue.refs, value)
-      case recently_enqueued_ref == ref {
-        True -> Ok(#(value, PriorityQueue(refs: queue.refs, queue: pqueue)))
-        False -> pop(PriorityQueue(refs: queue.refs, queue: pqueue))
-      }
-    }
-    #(Empty, _pqueue) -> {
-      Error(Nil)
-    }
-  }
-}