impl TrustedLen for vec::Drain

rust-lang · Nov 25, 2019 · f8a4b6d · f8a4b6d
1 parent a44774c
commit f8a4b6d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
@@ -2701,6 +2701,9 @@ impl<T> ExactSizeIterator for Drain<'_, T> {
     }
 }
 
+#[unstable(feature = "trusted_len", issue = "37572")]
+unsafe impl<T> TrustedLen for Drain<'_, T> {}
+
 #[stable(feature = "fused", since = "1.26.0")]
 impl<T> FusedIterator for Drain<'_, T> {}