Add an empty() member to FoldingSet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55182 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/FoldingSet.h b/include/llvm/ADT/FoldingSet.h
index f34a62d4f4c6be1076dc3752d13402212105aa36..287127243e76e69ef08de6735cf9a9507baa2d90 100644 (file)
--- a/include/llvm/ADT/FoldingSet.h
+++ b/include/llvm/ADT/FoldingSet.h
@@ -164,6 +164,9 @@ public:
   
   /// size - Returns the number of nodes in the folding set.
   unsigned size() const { return NumNodes; }
+
+  /// empty - Returns true if there are no nodes in the folding set.
+  bool empty() const { return NumNodes == 0; }
   
 private: