1 files changed, 55 insertions, 0 deletions
diff --git a/test.cpp b/test.cpp
new file mode 100644
index 0000000..534dfca
--- /dev/null
+++ b/test.cpp
@@ -0,0 +1,55 @@
+#include <iostream>
+
+using std::cout;
+
+template<typename T>
+class Option {
+public:
+	Option<T>() {
+		exists = false;
+	}
+	Option<T>(T const &t) {
+		set(t);
+	}
+	void set(T const &t) {
+		exists = true;
+		x = t;
+	}
+	void clear() {
+		exists = false;
+	}
+	T *get() {
+		if (exists)
+			return &x;
+		else
+			return nullptr;
+	}
+	T const *get() const {
+		if (exists)
+			return &x;
+		else
+			return nullptr;
+	}
+private:
+	bool exists;
+	T x;
+};
+
+template<typename T>
+void print_option(Option<T> const &o) {
+	T const *ptr = o.get();
+	if (ptr)
+		cout << *ptr << "\n";
+	else
+		cout << "None\n";
+}
+
+int main() {
+	Option<int> o(7);
+	print_option(o);
+	o.clear();
+	print_option(o);
+	o.set(133);
+	print_option(o);
+	return 0;
+}