{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"(ast::Pat::WildcardPat(_),"}]}
        (ast::Pat::WildcardPat(_), _) => return None,
    let res = match (pat, pat2) {
        (pat, ast::Pat::WildcardPat(_)) => (pat, expr, expr2),