Document the return value of SmallSet insert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178742 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/include/llvm/ADT/SmallSet.h b/include/llvm/ADT/SmallSet.h
index 4eb7de895a..5dfe924f6d 100644
--- a/include/llvm/ADT/SmallSet.h
+++ b/include/llvm/ADT/SmallSet.h
@@ -55,6 +55,7 @@ public:
   }
 
   /// insert - Insert an element into the set if it isn't already there.
+  /// Returns true if the element is inserted (it was not in the set before).
   bool insert(const T &V) {
     if (!isSmall())
       return Set.insert(V).second;