From 5dda3a1f40e4e8f621b20f374c02b6d1e241e7cf Mon Sep 17 00:00:00 2001
From: angeld55 <angel_dimitriev@abv.bg>
Date: Tue, 10 May 2022 20:06:53 +0300
Subject: sem 11

---
 Sem. 10/Examples/Optional/Optional.hpp | 74 ++++++++++++++++++++++++++++++++++
 Sem. 10/Examples/Optional/Source2.cpp  | 19 +++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 Sem. 10/Examples/Optional/Optional.hpp
 create mode 100644 Sem. 10/Examples/Optional/Source2.cpp

(limited to 'Sem. 10/Examples/Optional')

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;
+}
diff --git a/Sem. 10/Examples/Optional/Source2.cpp b/Sem. 10/Examples/Optional/Source2.cpp
new file mode 100644
index 0000000..7c3e21b
--- /dev/null
+++ b/Sem. 10/Examples/Optional/Source2.cpp	
@@ -0,0 +1,19 @@
+#include <iostream>
+#include "Optional.hpp"
+
+
+
+int main()
+{
+	Optional<int> d; //no value
+
+	d.setData(3);
+
+	d.getData();
+
+	d.clear();
+	
+
+	std::cout << d.containsData();
+
+}
-- 
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