From b9618dc3b4e93f02eae448e7540ead198005e339 Mon Sep 17 00:00:00 2001
From: Mark Spanbroek <mark@spanbroek.net>
Date: Thu, 2 Oct 2025 07:01:15 +0000
Subject: [PATCH] feat: dispose iterator when it goes out of scope

---
 leveldbstatic.nim | 4 ++++
 tests/test.nim    | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/leveldbstatic.nim b/leveldbstatic.nim
index 11880bf..4cfaf1b 100644
--- a/leveldbstatic.nim
+++ b/leveldbstatic.nim
@@ -446,6 +446,10 @@ proc next*(iter: LevelDbQueryIter): (string, string) =
 proc dispose*(iter: LevelDbQueryIter) =
   iter.dispose(iter[])
 
+proc `=destroy`(iter: var LevelDbQueryIterObj) =
+  if iter.dispose != nil:
+    iter.dispose(iter)
+
 proc closeIter(iter: var LevelDbQueryIterObj, iterPtr: ptr leveldb_iterator_t) =
   iter.finished = true
   leveldb_iter_destroy(iterPtr)
diff --git a/tests/test.nim b/tests/test.nim
index 9799054..864de39 100644
--- a/tests/test.nim
+++ b/tests/test.nim
@@ -255,6 +255,15 @@ suite "leveldb queryIter":
       iter.next() == empty
       iter.finished
 
+  test "iterator is disposed when it goes out of scope":
+    when defined(gcOrc) or defined(gcArc):
+      block:
+        let iter = db.queryIter()
+        discard iter.next()
+      db.close() # crashes if iterator not disposed
+    else:
+      skip()
+
   test "skip":
     let iter = db.queryIter(skip = 1)
     check: