---

yaml
---
r: 152365
b: refs/heads/try2
c: 9731c28
h: refs/heads/master
i:
  152363: 08bd44d
v: v3

Author: aochagavia

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: f1bff592b1d3dff14459374af930ae3fee6253ce
+refs/heads/try2: 9731c28e116943220b397d3131273344f0750913
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/libcollections/smallintmap.rs

@@ -17,6 +17,7 @@
 
 use core::prelude::*;
 
+use core::fmt;
 use core::iter::{Enumerate, FilterMap};
 use core::mem::replace;
 
@@ -176,6 +177,18 @@ impl<V:Clone> SmallIntMap<V> {
     }
 }
 
+impl<V: fmt::Show> fmt::Show for SmallIntMap<V> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        try!(write!(f, r"\{"));
+
+        for (i, (k, v)) in self.iter().enumerate() {
+            if i != 0 { try!(write!(f, ", ")); }
+            try!(write!(f, "{}: {}", k, *v));
+        }
+
+        write!(f, r"\}")
+    }
+}
 
 macro_rules! iterator {
     (impl $name:ident -> $elem:ty, $getter:ident) => {
@@ -461,6 +474,20 @@ mod test_map {
         assert!(called);
         m.insert(2, box 1);
     }
+
+    #[test]
+    fn test_show() {
+        let mut map = SmallIntMap::new();
+        let empty = SmallIntMap::<int>::new();
+
+        map.insert(1, 2);
+        map.insert(3, 4);
+
+        let map_str = map.to_str();
+        let map_str = map_str.as_slice();
+        assert!(map_str == "{1: 2, 3: 4}" || map_str == "{3: 4, 1: 2}");
+        assert_eq!(format!("{}", empty), "{}".to_string());
+    }
 }
 
 #[cfg(test)]