1 files changed, 4 insertions, 0 deletions

diff --git a/common/storage.h b/common/storage.h
index da225ef..a7241a7 100644
--- a/common/storage.h
+++ b/common/storage.h
@@ -94,6 +94,10 @@ public:
             other.d = nullptr;
             return *this;
         }
+
+        operator bool() const {
+            return (d != nullptr);
+        }
     private:
         Transaction(Transaction& other);
         Transaction& operator=(Transaction& other);