Macro thiserror_lite::err_enum

macro_rules! err_enum {
    ($(#[$error_attribute:meta])* $vis:vis enum $error_type_name:ident { $(
		#[error($desc:tt)]
		$variant_name:ident
		$({$(
			$(#[$sattr:ident])? $sf:ident: $st:ty
		),* $(,)?})?
		$(($(
			$(#[$tattr:ident])? $tt:ty
		),* $(,)?))?
	),* $(,)? }) => { ... };
}