public void visitParens(JCParens tree) {
        Type owntype = attribTree(tree.expr, env, pkind, pt);
        result = check(tree, owntype, pkind, pkind, pt);
        Symbol sym = TreeInfo.symbol(tree);
        if (sym != null && (sym.kind&(TYP|PCK)) != 0)
            log.error(tree.pos(), "illegal.start.of.type");
    }