slr_config::slr_def!

macro_rules! slr_def {
    (
		$(#[$attrs:meta])*
		pub struct $name: ident
		{
			$($field_name: ident : $field_type: ty = $field_init: expr),*
		}
	) => { ... };
    (
		$(#[$attrs:meta])*
		struct $name: ident
		{
			$($field_name: ident : $field_type: ty = $field_init: expr),*
		}
	) => { ... };
}