make destructors virtual

SDL2pp/Exception.cc

@@ -28,6 +28,10 @@ namespace SDL2pp {
 Exception::Exception(const char* what) : what_(what), sdl_error_(SDL_GetError()) {
 }
 
+Exception::~Exception() noexcept {
+	// nothing to do
+}
+
 const char* Exception::what() const noexcept {
 	return what_;
 }

SDL2pp/Exception.hh

@@ -33,6 +33,7 @@ private:
 
 public:
 	Exception(const char* what = "");
+	virtual ~Exception() noexcept;
 	const char* what() const noexcept;
 	const char* GetSDLError() const noexcept;
 };

SDL2pp/Point.hh

@@ -45,7 +45,7 @@ private:
 
 public:
 	Point(int x, int y);
-	~Point();
+	virtual ~Point();
 
 	static Point Null();
 

SDL2pp/Rect.hh

@@ -37,7 +37,7 @@ private:
 
 public:
 	Rect(int x, int y, int w, int h);
-	~Rect();
+	virtual ~Rect();
 
 	static Rect Null();
 

SDL2pp/Renderer.hh

@@ -39,7 +39,7 @@ private:
 
 public:
 	Renderer(Window& window, int index, Uint32 flags);
-	~Renderer();
+	virtual ~Renderer();
 
 	Renderer(const Renderer& other) = delete;
 	Renderer(Renderer&& other) = delete;

SDL2pp/SDL.hh

@@ -29,7 +29,7 @@ namespace SDL2pp {
 class SDL {
 public:
 	SDL(Uint32 flags);
-	~SDL();
+	virtual ~SDL();
 
 	SDL(const SDL& other) = delete;
 	SDL(SDL&& other) = delete;

SDL2pp/Texture.hh

@@ -38,7 +38,7 @@ private:
 
 public:
 	Texture(Renderer& renderer, Uint32 format, int access, int w, int h);
-	~Texture();
+	virtual ~Texture();
 
 	Texture(const Texture& other) = delete;
 	Texture(Texture&& other) = delete;

SDL2pp/Window.hh

@@ -34,7 +34,7 @@ private:
 
 public:
 	Window(const char* title, int x, int y, int w, int h, Uint32 flags);
-	~Window();
+	virtual ~Window();
 
 	Window(const Window& other) = delete;
 	Window(Window&& other) = delete;