1 files changed, 48 insertions, 0 deletions
diff --git a/ecs/src/util.rs b/ecs/src/util.rs
new file mode 100644
index 0000000..f4f8632
--- /dev/null
+++ b/ecs/src/util.rs
@@ -0,0 +1,48 @@
+pub trait Sortable
+{
+    type Item;
+
+    fn sort_by_key_b<Key, Func>(&mut self, func: Func)
+    where
+        Func: FnMut(&Self::Item) -> Key,
+        Key: Ord;
+}
+
+impl<Item> Sortable for [Item]
+{
+    type Item = Item;
+
+    fn sort_by_key_b<Key, Func>(&mut self, func: Func)
+    where
+        Func: FnMut(&Self::Item) -> Key,
+        Key: Ord,
+    {
+        self.sort_by_key(func)
+    }
+}
+
+impl<Item, const LENGTH: usize> Sortable for [Item; LENGTH]
+{
+    type Item = Item;
+
+    fn sort_by_key_b<Key, Func>(&mut self, func: Func)
+    where
+        Func: FnMut(&Self::Item) -> Key,
+        Key: Ord,
+    {
+        self.sort_by_key(func)
+    }
+}
+
+impl<Item> Sortable for Vec<Item>
+{
+    type Item = Item;
+
+    fn sort_by_key_b<Key, Func>(&mut self, func: Func)
+    where
+        Func: FnMut(&Self::Item) -> Key,
+        Key: Ord,
+    {
+        self.sort_by_key(func)
+    }
+}