Why don't you just use iosfwd? It's specifically designed to do the
forward decls for you.
-benjamin
> typedef class std::basic_istream<char, std::char_traits<char> > istream;
>
> The easiest work around I can think of for this problem would be to,
> instead, declare istream:
>
> class istream : public std::basic_istream<char, std::char_traits<char> >
> {};