1 files changed, 16 insertions, 0 deletions
diff --git a/library/core/src/unit.rs b/library/core/src/unit.rs
index d656005f3d4..d54816c444b 100644
--- a/library/core/src/unit.rs
+++ b/library/core/src/unit.rs
@@ -17,3 +17,19 @@ impl FromIterator<()> for () {
         iter.into_iter().for_each(|()| {})
     }
 }
+
+pub(crate) trait IsUnit {
+    fn is_unit() -> bool;
+}
+
+impl<T: ?Sized> IsUnit for T {
+    default fn is_unit() -> bool {
+        false
+    }
+}
+
+impl IsUnit for () {
+    fn is_unit() -> bool {
+        true
+    }
+}