1 files changed, 7 insertions, 2 deletions
diff --git a/GateNor.h b/GateNor.h
index 2c2760d..35b5a74 100644
--- a/GateNor.h
+++ b/GateNor.h
@@ -4,11 +4,16 @@
 #include "GateOr.h"
 
 class GateNor : public GateOr {
-private:
+public:
+	virtual GateNor * clone() const;
+
+protected:
 	SignalLevel level();
+	using GateOr::GateOr;
 
+private:
+	GateNor(const GateNor *) : GateOr() {}
 	// GateNor(const char * type);
-	using GateOr::GateOr;
 	constexpr static const char * type = "nor";
 	static GateNor instance;
 };