Re: [boost] [proto] Problems with operator <<

In this case, I would define a separate is_big_number trait like:

template<typename T> struct is_big_number_ptr : mpl::false_ {};

template<typename Arg> struct is_big_number_ptr<big_number<Arg>*> : mpl::true_ {};

and use the trick with proto::and_ and proto::if_ that I gave you before.

Thanks, that gets it! John.