[ADT] add iterator_range::empty()

llvm-svn: 361944

diff --git a/llvm/include/llvm/ADT/iterator_range.h b/llvm/include/llvm/ADT/iterator_range.h
index 774c7c4..aa88309 100644 (file)
--- a/llvm/include/llvm/ADT/iterator_range.h
+++ b/llvm/include/llvm/ADT/iterator_range.h
@@ -44,6 +44,7 @@ public:
 
   IteratorT begin() const { return begin_iterator; }
   IteratorT end() const { return end_iterator; }
+  bool empty() const { return begin_iterator == end_iterator; }
 };
 
 /// Convenience function for iterating over sub-ranges.