Yuval Ronen writes:

EMalenfant@interstarinc.com wrote:

...

From: Yuval Ronen [mailto:ronen_yuval@yahoo.com]

...

Is there a meta-function that creates a tuple type which contains the types contained in a type-sequence? (I'm talking about a similar thing to variant's make_variant_over).

We use a generator like this:

template<typename Typelist> struct TupleGen : boost::mpl::reverse_fold< Typelist, boost::tuples::null_type, boost::tuples::cons > { };

Great, thanks a lot. BTW, is there the opposite meta-function, i.e, getting a typelist out of an existing tuple type?

If you use fusion, all your existing tuple types will be valid MPL type sequences. -- Dave Abrahams Boost Consulting www.boost-consulting.com