treemap: reimplement using TotalOrd

Author: thestinger

src/libcore/prelude.rs

@@ -27,7 +27,7 @@ pub use clone::Clone;
 pub use cmp::{Eq, Ord, TotalOrd, Ordering, Less, Equal, Greater};
 pub use container::{Container, Mutable, Map, Set};
 pub use hash::Hash;
-pub use iter::{BaseIter, ExtendedIter, EqIter, CopyableIter};
+pub use iter::{BaseIter, ReverseIter, ExtendedIter, EqIter, CopyableIter};
 pub use iter::{CopyableOrderedIter, CopyableNonstrictIter, Times};
 pub use num::NumCast;
 pub use path::GenericPath;