seminar 04 07_manager

seminar04_templates/07_manager/main.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <string>
+
+template <typename T>
+class Manager {
+private:
+        T* mPtr;
+public:
+        Manager() {
+            mPtr = nullptr;
+        }
+        void allocate() {
+            mPtr = (T*)malloc(sizeof(T));
+        }
+        void construct(const T& t) {
+            new(mPtr) T{t};
+        }
+        T& get() {
+            return *mPtr;
+        }
+        void destruct() {
+            mPtr->~T();
+        }
+        void deallocate() {
+            free(mPtr);
+        }
+};
+
+int main() {
+    Manager<std::string> a;
+    a.allocate();
+    a.construct("Cats and dogs");
+    a.get() += " and elephants";
+    std::cout << a.get() << std::endl;
+    a.destruct();
+
+    a.construct("Sapere aude");
+    std::cout << a.get() << std::endl;
+
+    a.destruct();
+    a.deallocate();
+}