---

yaml
---
r: 159023
b: refs/heads/auto
c: 12db4de
h: refs/heads/master
i:
  159021: 13da4f5
  159019: 43e7771
  159015: d25c105
  159007: aa138b0
v: v3

Author: jbcrail

[refs]

@@ -10,7 +10,7 @@ refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503
 refs/tags/release-0.3.1: 495bae036dfe5ec6ceafd3312b4dca48741e845b
 refs/tags/release-0.4: e828ea2080499553b97dfe33b3f4d472b4562ad7
 refs/tags/release-0.5: 7e3bcfbf21278251ee936ad53e92e9b719702d73
-refs/heads/auto: 01b599eb34125b7bc4d01fd7cc24876179ad6798
+refs/heads/auto: 12db4de554faf8e2f6baca4514b1e5983cb60783
 refs/heads/servo: af82457af293e2a842ba6b7759b70288da276167
 refs/tags/release-0.6: b4ebcfa1812664df5e142f0134a5faea3918544c
 refs/tags/0.1: b19db808c2793fe2976759b85a355c3ad8c8b336

branches/auto/src/libcollections/enum_set.rs

@@ -403,9 +403,29 @@ mod test {
         let elems = e_intersection.iter().collect();
         assert_eq!(vec![C], elems)
 
+        // Another way to express intersection
+        let e_intersection = e1 - (e1 - e2);
+        let elems = e_intersection.iter().collect();
+        assert_eq!(vec![C], elems)
+
         let e_subtract = e1 - e2;
         let elems = e_subtract.iter().collect();
         assert_eq!(vec![A], elems)
+
+        // Bitwise XOR of two sets, aka symmetric difference
+        let e_symmetric_diff = e1 ^ e2;
+        let elems = e_symmetric_diff.iter().collect();
+        assert_eq!(vec![A,B], elems)
+
+        // Another way to express symmetric difference
+        let e_symmetric_diff = (e1 - e2) | (e2 - e1);
+        let elems = e_symmetric_diff.iter().collect();
+        assert_eq!(vec![A,B], elems)
+
+        // Yet another way to express symmetric difference
+        let e_symmetric_diff = (e1 | e2) - (e1 & e2);
+        let elems = e_symmetric_diff.iter().collect();
+        assert_eq!(vec![A,B], elems)
     }
 
     #[test]