{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(pat,"}]}
        (pat, ast::Pat::WildcardPat(_)) => (pat, expr, expr2),
        (ast::Pat::WildcardPat(_), _) => return None,
        (pat, _) if is_empty_expr(&expr2) => (pat, expr, expr2),