{"ast_node_type":"import","tokens":[{"end":59,"kind":"keyword","start":0,"text":"///"}]}
/// tree, because then the matcher would hang indefinitely.
/// Checks that the lhs contains no repetition which could match an empty token
fn check_lhs_no_empty_seq(sess: &Session, tts: &[mbe::TokenTree]) -> Result<(), ErrorGuaranteed> {