Improve Handle class.

src/wren/handle.hpp

@@ -7,20 +7,54 @@ namespace wren {
 
 	class Handle {
 	public:
+		Handle() noexcept;
+		Handle (const Handle&) = delete;
+		Handle (Handle&& other) noexcept;
 		explicit Handle (VM* vm, WrenHandle* handle) noexcept :
 			m_handle(handle),
 			m_vm(vm)
 		{
 		}
 
+		Handle& operator= (const Handle&) = delete;
+		Handle& operator= (Handle&& other) noexcept;
+
 		~Handle() noexcept;
 		void release() noexcept;
 
-		operator WrenHandle*() { return m_handle; }
+		operator WrenHandle*() const { return m_handle; }
 		operator bool() const { return nullptr != m_handle; }
 
 	private:
 		WrenHandle* m_handle;
 		VM* m_vm;
 	};
+
+	inline Handle::Handle() noexcept :
+		m_handle(nullptr),
+		m_vm(nullptr)
+	{
+	}
+
+	inline Handle::Handle (Handle&& other) noexcept :
+		m_handle(other.m_handle),
+		m_vm(other.m_vm)
+	{
+		other.m_handle = nullptr;
+		other.m_vm = nullptr;
+	}
+
+	inline Handle& Handle::operator= (Handle&& other) noexcept {
+		{
+			auto tmp = other.m_handle;
+			other.m_handle = m_handle;
+			m_handle = tmp;
+		}
+		{
+			auto tmp = other.m_vm;
+			other.m_vm = m_vm;
+			m_vm = tmp;
+		}
+		return *this;
+	}
 } //namespace wren