blog.gauner.org

Das ist wohl der erste “self containing singleton” (so habe ich ihn getauft) in D:

 8:    /// Singleton instance.
 9:    private static SceneManager singleton;
10:
11:    /// No public need for this.
12:    private static this() {
13:        singleton = new SceneManager();
14:    }
15:
16:    /// Get signleton instance.
17:    public static SceneManager opCall() {
18:        if(singleton == null)
19:            singleton = new SceneManager();
20:        return singleton;
21:    }

z.B.:

SceneManager().registerScene(new DebugScene());
SceneManager().registerScene(new StarfieldScene());