Macro apparat::build_wrapper

macro_rules! build_wrapper {
    (
        states: [$state1:ident, $($state:ident),* $(,)*],
        wrapper: $wrapper:ident,
        context: $context:ty,
        event: $event:ty,
        output: $output:ty
        $(,)*
    ) => { ... };
}

Generate an enum that wraps all provided state types. Additionally all necessary traits are implemented for it, so the wrapper can be used within an Apparat state machine.