Add reverse_bits to integer types

2 files changed, 12 insertions, 0 deletions

diff --git a/src/libcore/tests/lib.rs b/src/libcore/tests/lib.rs
index 0049ed66a10..a9c5683e0ef 100644
--- a/src/libcore/tests/lib.rs
+++ b/src/libcore/tests/lib.rs
@@ -46,6 +46,7 @@
 #![feature(try_trait)]
 #![feature(exact_chunks)]
 #![feature(atomic_nand)]
+#![feature(reverse_bits)]
 
 extern crate core;
 extern crate test;
diff --git a/src/libcore/tests/num/uint_macros.rs b/src/libcore/tests/num/uint_macros.rs
index daa1cc3a7f4..ca6906f7310 100644
--- a/src/libcore/tests/num/uint_macros.rs
+++ b/src/libcore/tests/num/uint_macros.rs
@@ -98,6 +98,17 @@ mod tests {
     }
 
     #[test]
+    fn test_reverse_bits() {
+        assert_eq!(A.reverse_bits().reverse_bits(), A);
+        assert_eq!(B.reverse_bits().reverse_bits(), B);
+        assert_eq!(C.reverse_bits().reverse_bits(), C);
+
+        // Swapping these should make no difference
+        assert_eq!(_0.reverse_bits(), _0);
+        assert_eq!(_1.reverse_bits(), _1);
+    }
+
+    #[test]
     fn test_le() {
         assert_eq!($T::from_le(A.to_le()), A);
         assert_eq!($T::from_le(B.to_le()), B);