How to Type returning a System from a function without typing all parameters (i.e a "System" type?)

[Joel-Singh]

Wrote this higher-order function returning a system for a current project, in Bevy 0.16.0, that lets me easily set the text of a "MessageBox":

fn set_message(message: String) -> impl Fn(Commands, Single<Entity, With<MessageBox>>) {
    return move |mut commands: Commands, message_box: Single<Entity, With<MessageBox>>| {
        commands
            .entity(*message_box)
            .insert(Text::new(message.clone()));
    };
}

Is there a type I can put for the return value, instead of typing out every parameter with Fn?

Thanks,
Joel

[hymm]

if you're trying to insert the system into a schedule you can do this:

fn set_message(message: String) -> ScheduleConfigs<ScheduleSystem> {
    return (move |mut commands: Commands, message_box: Query<Entity, With<Ray>>| {
        commands
            .entity(message_box.single().unwrap())
            .insert(Text::new(message.clone()));
    })
    .into_configs();
}

[Joel-Singh]

That works! Thank you. And yep, I am trying to insert the system into a schedule (should've specified that.)