From: Andrew Trick <atrick@apple.com>
Date: Fri, 25 Jan 2013 06:33:52 +0000 (+0000)
Subject: ArrayRef reverse iterators.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=827de0520ee986fcda5f0d3290a3746249fa5847;p=oota-llvm.git

ArrayRef reverse iterators.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173424 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/ArrayRef.h b/include/llvm/ADT/ArrayRef.h
index a707a0d4fdb..c555c1c2b1d 100644
--- a/include/llvm/ADT/ArrayRef.h
+++ b/include/llvm/ADT/ArrayRef.h
@@ -33,6 +33,8 @@ namespace llvm {
     typedef const T *const_iterator;
     typedef size_t size_type;
 
+    typedef std::reverse_iterator<iterator> reverse_iterator;
+
   private:
     /// The start of the array, in an external buffer.
     const T *Data;
@@ -84,6 +86,9 @@ namespace llvm {
     iterator begin() const { return Data; }
     iterator end() const { return Data + Length; }
 
+    reverse_iterator rbegin() const { return reverse_iterator(end()); }
+    reverse_iterator rend() const { return reverse_iterator(begin()); }
+
     /// empty - Check if the array is empty.
     bool empty() const { return Length == 0; }