From ae09d95160919f8801caa22e2867e9680e6cb05b Mon Sep 17 00:00:00 2001
From: blake2-ppc <blake2-ppc>
Date: Tue, 30 Jul 2013 02:48:40 +0200
Subject: [PATCH] extra: Add .rev_iter() for bitv

---
 src/libextra/bitv.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/libextra/bitv.rs b/src/libextra/bitv.rs
index 914aa20792f1..90824a653faa 100644
--- a/src/libextra/bitv.rs
+++ b/src/libextra/bitv.rs
@@ -409,6 +409,11 @@ impl Bitv {
         BitvIterator {bitv: self, next_idx: 0, end_idx: self.nbits}
     }
 
+    #[inline]
+    pub fn rev_liter<'a>(&'a self) -> Invert<BitvIterator<'a>> {
+        self.iter().invert()
+    }
+
     /// Returns true if all bits are 0
     pub fn is_false(&self) -> bool {
       match self.rep {