add iterable

smart_ptr.cc

@@ -0,0 +1,44 @@
+#include <iostream>
+#include <memory>
+#include "main.h"
+
+template<typename T>
+class Wrapper {
+	std::shared_ptr<T> impl;
+
+public:
+	explicit Wrapper(std::shared_ptr<T> ptr) : impl(std::move(ptr)) {}
+
+	T* operator->() { return impl.get(); }
+	const T* operator->() const { return impl.get(); }
+
+	std::shared_ptr<T> get() const { return impl; }
+
+	operator std::shared_ptr<T>() const { return impl; }
+	operator const std::shared_ptr<T>&() const { return impl; }
+	operator std::shared_ptr<T>&() { return impl; }
+
+	void myHelper() const {
+		std::cout << "[Wrapper] Helper method called\n";
+	}
+};
+
+void draw_shape(const std::shared_ptr<IShape>& shape) {
+	shape->draw();
+}
+
+int main() {
+	auto circle = std::make_shared<Circle>(10.0);
+	Wrapper<IShape> wrapped(circle);
+
+	wrapped->draw();
+
+	std::cout << "Area: " << wrapped->area() << "\n";
+
+	wrapped.myHelper();
+
+	draw_shape(wrapped);
+
+	std::shared_ptr<IShape> copy = wrapped;
+	draw_shape(copy);
+}