#[derive(Bundle)] should support sub bundles

[CAD97]

What problem does this solve or what need does it fill?

The following code shape should work:

#[derive(Bundle)]
struct PhysicsSpriteBundle {
    sprite: SpriteBundle, // impl Bundle
    rigid_body: RigidBody, // impl Component
    collision: CollisionShape, // impl Component
}

What solution would you like?

Use autoref specialization (or autoderef specialization) to appropriately either use the field impl Component directly or recurse into the field impl Bundle.

What alternative(s) have you considered?

• Put the components from the "sub bundle" directly into the new bundle.
• Use setup system instead of bundle.
• Use plugin instead of bundle.

Additional context

Ran into during Bevy Jam #​1. Bevy 0.6.1.

[alice-i-cecile]

Are you aware of the #[bundle] field annotation? Will that meet your needs?

Also #2974 will solve this directly.

[CAD97]

Ah, I didn't see that, I'm sort of moving too fast in jam mode 🙃

It's nice to see that this is already sort of planned to end up just working, though!

I'm closing this, as the direct request is served by the bundle attribute.