diff --git a/src/platform.cpp b/src/platform.cpp
index 0bf89bd..a8a00c4 100644
--- a/src/platform.cpp
+++ b/src/platform.cpp
@@ -33,6 +33,16 @@ namespace cloonel {
 		assert(m_surface);
 	}
 
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	Platform::Platform (Platform&& parOther) :
+		m_screenRatio(std::move(parOther.m_screenRatio)),
+		m_position(parOther.m_position),
+		m_size(parOther.m_size),
+		m_surface(parOther.m_surface)
+	{
+	}
+
 	///--------------------------------------------------------------------------
 	///--------------------------------------------------------------------------
 	void Platform::Draw() const {
diff --git a/src/platform.hpp b/src/platform.hpp
index 988b3a1..c099299 100644
--- a/src/platform.hpp
+++ b/src/platform.hpp
@@ -30,8 +30,10 @@ namespace cloonel {
 	class Platform : public Drawable {
 	public:
 		Platform ( SDLMain* parSdlMain, const float2& parPos, Texture* parTexture, const float2& parSize );
+		Platform ( Platform&& parOther );
+		Platform ( const Platform& ) = delete;
 		virtual ~Platform ( void ) noexcept = default;
-		Platform& operator= ( Platform&& parOther );
+		Platform& operator= ( Platform&& parOther ) = delete;
 
 		virtual void Draw ( void ) const;
 
diff --git a/src/sizenotifiable.cpp b/src/sizenotifiable.cpp
index 3ba17ad..f600379 100644
--- a/src/sizenotifiable.cpp
+++ b/src/sizenotifiable.cpp
@@ -25,16 +25,24 @@ namespace cloonel {
 		///----------------------------------------------------------------------
 		void AutoRegister::Unregister() noexcept {
 #if !defined(NDEBUG)
-			assert(m_registered);
+			assert(m_registered or not m_sdlmain);
 			m_registered = false;
 #endif
-			assert(m_sdlmain);
-			m_sdlmain->UnregisterForResChange(m_id);
+			if (m_registered) {
+				assert(m_sdlmain);
+				m_sdlmain->UnregisterForResChange(m_id);
+			}
 		}
 
 		///----------------------------------------------------------------------
 		///----------------------------------------------------------------------
-		void AutoRegister::Swap (AutoRegister& parOther) noexcept {
+		AutoRegister::AutoRegister (AutoRegister&& parOther) :
+			m_sdlmain(nullptr),
+			m_id(0)
+#if !defined(NDEBUG)
+			, m_registered(false)
+#endif
+		{
 			std::swap(m_sdlmain, parOther.m_sdlmain);
 			std::swap(m_id, parOther.m_id);
 #if !defined(NDEBUG)
@@ -48,11 +56,4 @@ namespace cloonel {
 	void SizeNotifiableBase::NotifyResChanged (const SizeRatio& parSize) {
 		m_scaleRatio = parSize.Ratio();
 	}
-
-	///--------------------------------------------------------------------------
-	///--------------------------------------------------------------------------
-	void SizeNotifiableBase::swap (SizeNotifiableBase& parOther) noexcept {
-		std::swap(m_scaleRatio.x(), parOther.m_scaleRatio.x());
-		std::swap(m_scaleRatio.y(), parOther.m_scaleRatio.y());
-	}
 } //namespace cloonel
diff --git a/src/sizenotifiable.hpp b/src/sizenotifiable.hpp
index 0dea646..27fdc11 100644
--- a/src/sizenotifiable.hpp
+++ b/src/sizenotifiable.hpp
@@ -34,17 +34,18 @@ namespace cloonel {
 			enum { SDLMAIN_NEEDED = false };
 
 			DontRegister ( void ) = default;
+			DontRegister ( DontRegister&& ) { }
 			~DontRegister ( void ) noexcept = default;
 
 			void Register ( SizeNotifiableBase* ) const noexcept { return; }
 			void Unregister ( void ) const noexcept { return; }
-			void Swap ( DontRegister& ) noexcept { return; }
 		};
 
 		class AutoRegister {
 		public:
 			enum { SDLMAIN_NEEDED = true };
 
+			AutoRegister ( AutoRegister&& parOther );
 			explicit AutoRegister ( SDLMain* parMain ) :
 				m_sdlmain(parMain)
 #if !defined(NDEBUG)
@@ -56,7 +57,6 @@ namespace cloonel {
 
 			void Register ( SizeNotifiableBase* parNotifiable );
 			void Unregister ( void ) noexcept;
-			void Swap ( AutoRegister& parOther ) noexcept;
 
 		private:
 			SDLMain* m_sdlmain;
@@ -73,7 +73,7 @@ namespace cloonel {
 	class SizeNotifiableBase {
 	protected:
 		SizeNotifiableBase ( void ) = default;
-		SizeNotifiableBase ( const SizeNotifiableBase& ) = delete;
+		SizeNotifiableBase ( const SizeNotifiableBase& ) = default;
 		virtual ~SizeNotifiableBase ( void ) noexcept = default;
 		SizeNotifiableBase& operator= ( const SizeNotifiableBase& ) = delete;
 
@@ -81,9 +81,6 @@ namespace cloonel {
 		virtual void NotifyResChanged ( const SizeRatio& parSize );
 		const float2& Ratio ( void ) const noexcept { return m_scaleRatio; }
 
-	protected:
-		void swap ( SizeNotifiableBase& parOther ) noexcept;
-
 	private:
 		float2 m_scaleRatio;
 	};
@@ -95,20 +92,30 @@ namespace cloonel {
 	class SizeNotifiable<RegisterBehaviour, false> : private RegisterBehaviour, public SizeNotifiableBase {
 		static_assert(RegisterBehaviour::SDLMAIN_NEEDED == false, "SdlMainNeeded mismatches expected value");
 	public:
+		SizeNotifiable ( const SizeNotifiable& ) = delete;
+		SizeNotifiable ( SizeNotifiable&& parOther ) :
+			RegisterBehaviour(parOther),
+			SizeNotifiableBase(parOther)
+		{
+		}
 		SizeNotifiable ( void ) {
 			this->Register(this);
 		}
 		virtual ~SizeNotifiable ( void ) noexcept {
 			this->Unregister();
 		}
-
-		void swap ( SizeNotifiable& parOther ) noexcept { SizeNotifiableBase::swap(parOther); RegisterBehaviour::swap(parOther); }
 	};
 
 	template <class RegisterBehaviour>
 	class SizeNotifiable<RegisterBehaviour, true> : private RegisterBehaviour, public SizeNotifiableBase {
 		static_assert(RegisterBehaviour::SDLMAIN_NEEDED == true, "SdlMainNeeded mismatches expected value");
 	public:
+		SizeNotifiable ( const SizeNotifiable& ) = delete;
+		SizeNotifiable ( SizeNotifiable&& parOther ) :
+			RegisterBehaviour(std::move(parOther)),
+			SizeNotifiableBase(parOther)
+		{
+		}
 		explicit SizeNotifiable ( SDLMain* parSdlMain ) :
 			RegisterBehaviour(parSdlMain)
 		{
@@ -117,8 +124,6 @@ namespace cloonel {
 		virtual ~SizeNotifiable ( void ) noexcept {
 			this->Unregister();
 		}
-
-		void swap ( SizeNotifiable& parOther ) noexcept { SizeNotifiableBase::swap(parOther); RegisterBehaviour::swap(parOther); }
 	};
 } //namespace cloonel