Add a way to swap some types of objects

SDL2pp/Point.cc

@@ -81,4 +81,8 @@ int Point::GetY() const {
 	return point_->y;
 }
 
+void Point::Swap(Point& other) noexcept {
+	point_.swap(other.point_);
+}
+
 }

SDL2pp/Point.hh

@@ -61,6 +61,8 @@ public:
 
 	int GetX() const;
 	int GetY() const;
+
+	void Swap(Point& other) noexcept;
 };
 
 }

SDL2pp/Rect.cc

@@ -111,4 +111,8 @@ int Rect::GetY2() const {
 	return rect_->y + rect_->h;
 }
 
+void Rect::Swap(Rect& other) noexcept {
+	rect_.swap(other.rect_);
+}
+
 }

SDL2pp/Rect.hh

@@ -59,6 +59,8 @@ public:
 	int GetH() const;
 	int GetX2() const;
 	int GetY2() const;
+
+	void Swap(Rect& other) noexcept;
 };
 
 }

SDL2pp/Texture.cc

@@ -56,4 +56,10 @@ void Texture::SetAlphaMod(Uint8 alpha) {
 		throw Exception("SDL_SetTextureAlphaMod failed");
 }
 
+void Texture::Swap(Texture& other) noexcept {
+	SDL_Texture* tmp = other.texture_;
+	other.texture_ = texture_;
+	texture_ = tmp;
+}
+
 }

SDL2pp/Texture.hh

@@ -51,6 +51,8 @@ public:
 
 	void SetBlendMode(SDL_BlendMode blendMode);
 	void SetAlphaMod(Uint8 alpha);
+
+	void Swap(Texture& other) noexcept;
 };
 
 }