impl Hash for !

2018-06-06 19:40:03 -04:00 · 2018-06-06 19:40:03 -04:00 · 570590f727
commit 570590f727
parent 5205ae8bdc
1 changed files with 7 additions and 0 deletions
--- a/src/libcore/hash/mod.rs
+++ b/src/libcore/hash/mod.rs
@ -603,6 +603,13 @@ mod impls {
        }
    }

+    #[stable(feature = "never_hash", since = "1.29.0")]
+    impl Hash for ! {
+        fn hash<H: Hasher>(&self, _: &mut H) {
+            *self
+        }
+    }
+
    macro_rules! impl_hash_tuple {
        () => (
            #[stable(feature = "rust1", since = "1.0.0")]