29 	virtual void abc() = 0; // FIXME: remove dummy method

    30 	virtual void def(int a) = 0; // FIXME: remove dummy method

    31 	virtual void ghi(int a, int b) = 0; // FIXME: remove dummy method

    32 

    33 };

    34 

    35 class SAXContentHandlerProxy : public SAXContentHandler {

    36 private:

    37 	std::vector<std::shared_ptr<SAXContentHandler>> handlers;

    38 public:

    39 

    40 	void addHandler(std::shared_ptr<SAXContentHandler> handler) {

    41 		handlers.push_back(handler);

    42 	}

    43 

    44 #define handler for (auto ___h : handlers) ___h

    45 

    46 	void abc() override {

    47 		handler->abc();

    48 	}

    49 

    50 	void def(int a) override {

    51 		handler->def(a);

    52 	}

    53 

    54 	void ghi(int a, int b) override {

    55 		handler->ghi(a, b);

    56 	}

    57 

    58 #undef handler

    59