A way to quick fill a FlxTypedGroup?

[JohnD]

I use many FlxTypedGroups as object pools in my project, for bullets,particles, explosions,etc.

And everytime I create one, I seem to use the same 4-5 lines of code to init them and fill them with the objects. 

I was wondering if there is a way to share that functionality and use something like:

var pool_bullets:FlxTypedGroup<Bullet> = createPool(Bullet,20);

createPool should return a new FlxTypedGroup<Bullet> object filled with 20 Bullet, instances.

Haxe seems like a powerful language, but I can't seem to get into some of the more advanced features, like these kind of generics.

thanks!

[JohnD]

All I've come up with is this:

public static function createPool<T>(size:Int):FlxTypedGroup<T>

{

var pool = new FlxTypedGroup<T>();

var r1 = size;

pool.maxSize = size;

do {

pool.add(new T()).kill();

}while (--r1 >= 0);

return pool;

}

But the HAXE compiler complains 

Only generic type parameters can be constructed

[Gama11]

new T() isn't type-safe and thus can't work. Haxe doesn't know what the constructor for those classes looks like, they could have required arguments.

You can do this in a non-type-safe manner by assuming that each class you use the function for has the same constructor arguments using Type.createInstance(). That function requires a Class<T>, for example "Bullet" from your initial example.