From 765bfc3502e7de25cfdacc60b3aad4df388ada0b Mon Sep 17 00:00:00 2001
From: GRayHook <s@marinkevich.ru>
Date: Mon, 28 Jul 2025 15:47:44 +0700
Subject: [PATCH] Init

---
 .gitignore |  2 ++
 Makefile   |  8 ++++++++
 main.c     | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9e79b4d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+.*.swp
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6d59d74
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+run: wrappers
+	./wrappers
+
+wrappers: main.c
+	g++ -Wall -o wrappers main.c
+
+clean:
+	rm -f *.o wrappers
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..f4a8e19
--- /dev/null
+++ b/main.c
@@ -0,0 +1,50 @@
+#include <iostream>
+
+struct IShape {
+	virtual void draw() const = 0;
+	virtual ~IShape() = default;
+};
+
+class Circle : public IShape {
+public:
+	void draw() const override {
+		std::cout << "Circle::draw()\n";
+	}
+};
+
+
+template<typename T>
+class Wrapper {
+	T* impl;
+
+public:
+	Wrapper(T* obj) : impl(obj) {}
+
+	T* operator->() { return impl; }
+	const T* operator->() const { return impl; }
+
+	operator T*() { return impl; }
+	operator const T*() const { return impl; }
+
+	operator T&() { return *impl; }
+	operator const T&() const { return *impl; }
+};
+
+void render_shape_by_ptr(IShape* shape) {
+	shape->draw();
+}
+
+void render_shape_by_ref(IShape& shape) {
+	shape.draw();
+}
+
+int main() {
+	Circle c;
+	Wrapper<IShape> w(&c);
+
+	w->draw();
+
+	render_shape_by_ptr(w);
+
+	render_shape_by_ref(w);
+}