1 files changed, 54 insertions, 0 deletions
diff --git a/src/teaching/oop-2025/oop-notes/RuleOfFive.cpp b/src/teaching/oop-2025/oop-notes/RuleOfFive.cpp
new file mode 100644
index 0000000..c29afe2
--- /dev/null
+++ b/src/teaching/oop-2025/oop-notes/RuleOfFive.cpp
@@ -0,0 +1,54 @@
+class X {
+    Y* elements;
+    unsigned elementsCount;
+
+    void free() {
+        delete[] elements;
+    }
+    void copyFrom(const X& other) {
+        elementsCount = other.elementsCount;
+
+        elements = new Y[elementsCount];
+        for (unsigned i = 0; i < elementsCount; ++i)
+            elements[i] = other.elements[i];
+    }
+
+public:
+    X() {
+        elements = nullptr;
+        elementsCount = 0;
+    }
+    ~X() {
+        free();
+    }
+    X(const X& other) {
+        copyFrom(other);
+    }
+    X& operator=(const X& other) {
+        if (this != &other) {
+            free();
+            copyFrom(other);
+        }
+        return *this;
+    }
+
+    X(X&& other) {
+        elements = other.elements;
+        elementsCount = other.elementsCount;
+
+        other.elements = nullptr;
+        other.elementsCount = 0;
+    }
+    X& operator=(X&& other) {
+        if (this != &other) {
+            free();
+
+            elements = other.elements;
+            elementsCount = other.elementsCount;
+
+            other.elements = nullptr;
+            other.elementsCount = 0;
+        }
+        return *this;
+    }
+};