libstd: changes to in response to #5656

1 files changed, 16 insertions, 0 deletions

diff --git a/src/libstd/priority_queue.rs b/src/libstd/priority_queue.rs
index dd56e413595..c8d250f90f6 100644
--- a/src/libstd/priority_queue.rs
+++ b/src/libstd/priority_queue.rs
@@ -50,13 +50,29 @@ impl<T:Ord> Mutable for PriorityQueue<T> {
 
 pub impl <T:Ord> PriorityQueue<T> {
     /// Returns the greatest item in the queue - fails if empty
+    #[cfg(stage0)]
     fn top(&self) -> &'self T { &self.data[0] }
 
+    /// Returns the greatest item in the queue - fails if empty
+    #[cfg(stage1)]
+    #[cfg(stage2)]
+    #[cfg(stage3)]
+    fn top<'a>(&'a self) -> &'a T { &self.data[0] }
+
     /// Returns the greatest item in the queue - None if empty
+    #[cfg(stage0)]
     fn maybe_top(&self) -> Option<&'self T> {
         if self.is_empty() { None } else { Some(self.top()) }
     }
 
+    /// Returns the greatest item in the queue - None if empty
+    #[cfg(stage1)]
+    #[cfg(stage2)]
+    #[cfg(stage3)]
+    fn maybe_top<'a>(&'a self) -> Option<&'a T> {
+        if self.is_empty() { None } else { Some(self.top()) }
+    }
+
     /// Returns the number of elements the queue can hold without reallocating
     fn capacity(&self) -> uint { vec::capacity(&self.data) }