1 files changed, 74 insertions, 0 deletions
diff --git a/Sem. 10/Examples/Optional/Optional.hpp b/Sem. 10/Examples/Optional/Optional.hpp
new file mode 100644
index 0000000..9e3ab0f
--- /dev/null
+++ b/Sem. 10/Examples/Optional/Optional.hpp
@@ -0,0 +1,74 @@
+#pragma once
+#include <iostream>
+#include <exception>
+template <typename T>
+class Optional
+{
+	T* data; //DYN MEM
+
+	void copyFrom(const Optional<T>& other);
+	void free();
+public:
+	Optional();
+	Optional(const T& obj);
+
+	bool containsData() const;
+	const T& getData() const;
+	void setData(const T& el);
+	void clear();
+
+	
+};
+
+template <typename T>
+Optional<T>::Optional() : data(nullptr)
+{}
+
+template <typename T>
+Optional<T>::Optional(const T& obj) : data(nullptr)
+{
+	setData(obj);
+}
+
+template <typename T>
+bool Optional<T>::containsData() const
+{
+	return data != nullptr;
+}
+
+template <typename T>
+const T& Optional<T>::getData() const
+{
+	if (!containsData())
+		throw std::logic_error("No data in optional");
+	return *data;
+}
+
+template <typename T>
+void Optional<T>::setData(const T& el)
+{
+	delete data;
+	data = new T(el);// copy const; 
+}
+
+template <typename T>
+void Optional<T>::copyFrom(const Optional<T>& other)
+{
+	if (other.containsData())
+		data = new T(*other.data);
+	else
+		data = nullptr;
+}
+
+template <typename T>
+void Optional<T>::free()
+{
+	delete data;
+}
+
+template <typename T>
+void Optional<T>::clear()
+{
+	free();
+	data = nullptr;
+}