unsafe impl<T: Sync + Send> Send for Weak<T> { }
unsafe impl<T: Sync + Send> Sync for Weak<T> { }
+#[stable(feature = "rust1", since = "1.0.0")]
+impl<T: fmt::Debug> fmt::Debug for Weak<T> {
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ write!(f, "(Weak)")
+ }
+}
+
struct ArcInner<T> {
strong: atomic::AtomicUsize,
weak: atomic::AtomicUsize,