From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Tue, 11 Aug 2015 16:12:56 +0000 (+0000)
Subject: Add non-member begin and end so that drop_begin works on iterator_range.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a09a71fcea3d5cf2e2b3a697ff08c3703fcc576a;p=oota-llvm.git

Add non-member begin and end so that drop_begin works on iterator_range.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244620 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/iterator_range.h b/include/llvm/ADT/iterator_range.h
index 3dd679bd9b7..9ab1c9645b3 100644
--- a/include/llvm/ADT/iterator_range.h
+++ b/include/llvm/ADT/iterator_range.h
@@ -47,6 +47,16 @@ public:
   IteratorT end() const { return end_iterator; }
 };
 
+template <typename IteratorT>
+IteratorT begin(const iterator_range<IteratorT> &R) {
+  return R.begin();
+}
+
+template <typename IteratorT>
+IteratorT end(const iterator_range<IteratorT> &R) {
+  return R.end();
+}
+
 /// \brief Convenience function for iterating over sub-ranges.
 ///
 /// This provides a bit of syntactic sugar to make using sub-ranges