diff --git a/Assembly.cpp b/Assembly.cpp
index 3614bfc48..aebe71850 100644
--- a/Assembly.cpp
+++ b/Assembly.cpp
@@ -144,6 +144,8 @@ AssemblyItem const& Assembly::append(AssemblyItem const& _i)
 
 void Assembly::optimise()
 {
+	std::vector<pair<  vector<int>,  function< vector<AssemblyItem>(vector<AssemblyItem>) >  >> rules;
+//	rules.insert(make_pair({(int)Instruction::ADD, (int)Instruction::ADD, -(int)Push}, []() {}));
 }
 
 bytes Assembly::assemble() const
diff --git a/Assembly.h b/Assembly.h
index 26392d141..5194d23fa 100644
--- a/Assembly.h
+++ b/Assembly.h
@@ -51,11 +51,15 @@ public:
 
 	int deposit() const;
 
+	bool operator==(int _mask) const { return -_mask == (int)m_type || (m_type == Operation && _mask == (int)m_data); }
+
 private:
 	AssemblyItemType m_type;
 	u256 m_data;
 };
 
+inline bool operator==(int _i, AssemblyItem _ai) { return _ai.operator==(_i); }
+
 class Assembly
 {
 public: