diff -r dfd0403ff8b6 -r 2e6e9d9f2159 src/array_list.c
--- a/src/array_list.c	Wed Feb 08 18:56:58 2023 +0100
+++ b/src/array_list.c	Wed Feb 08 20:26:09 2023 +0100
@@ -292,6 +292,17 @@
     return result;
 }
 
+static int cx_arl_swap(
+        struct cx_list_s *list,
+        size_t i,
+        size_t j
+) {
+    if (i >= list->size || j >= list->size) return 1;
+    cx_array_list *arl = (cx_array_list *) list;
+    cx_array_swap(arl->data, list->itemsize, i, j);
+    return 0;
+}
+
 static void *cx_arl_at(
         struct cx_list_s const *list,
         size_t index
@@ -420,6 +431,7 @@
         cx_arl_insert_array,
         cx_arl_insert_iter,
         cx_arl_remove,
+        cx_arl_swap,
         cx_arl_at,
         cx_arl_find,
         cx_arl_sort,