Re: [Boost-Users] No more than 10 types in boost::tuple?

From: Tarjei Knapstad (tarjeik_at_[hidden])
Date: 2003-05-30 09:35:55

On Fri, 2003-05-30 at 14:08, Tarjei Knapstad wrote:
> I tried constructing a tuple with 12 types today without much luck. I've
> read through the headers to see if there was any obvious way of getting
> around the 10 limit but couldn't find one (I half expected to find
> something along the way of vectorxx<>, in MPL).
> 
> Am I being stupid, or is there really no way of constructing a tuple
> with more than 10 elements?
> 
It just occured to me that I can make the 10th template argument of
tuple a "cons" list in itself, but I find this a bit awkward, i.e.

typedef cons<float, cons<int, cons<double, null_type> > >  some_types;
typedef tuple<type1, type2, ..., some_types>   large_tuple;

Should tuple by default allow for more than 10 types? Or at least
provide macros ala Alexandrescu's typelist construction macros?

Cheers,
--
Tarjei