From c8c039151963e29b92978444f2dc6590dd173ece Mon Sep 17 00:00:00 2001
From: Nick Cameron <ncameron@mozilla.com>
Date: Fri, 28 Nov 2014 15:41:16 +1300
Subject: Add some impls of Show (RefCell, Weak, some resolve types)

---
 src/liballoc/rc.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/liballoc')

diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 75d4342083b..436b134ad25 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -719,6 +719,17 @@ impl<T> Clone for Weak<T> {
     }
 }
 
+#[experimental = "Show is experimental."]
+impl<T: fmt::Show> fmt::Show for Weak<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if self.strong() == 0 {
+            write!(f, "NULL")
+        } else {
+            (*self._ptr).fmt(f)
+        }
+    }
+}
+
 #[doc(hidden)]
 trait RcBoxPtr<T> {
     fn inner(&self) -> &RcBox<T>;
-- 
cgit 1.4.1-3-g733a5