From: David Abrahams (dave_at_[hidden])
Date: 2006-03-29 09:56:15
Yuval Ronen <ronen_yuval_at_[hidden]> writes:
> EMalenfant_at_[hidden] wrote:
>> From: Yuval Ronen [mailto:ronen_yuval_at_[hidden]]
>>
>>>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<boost::mpl::_2, boost::mpl::_1>
>> >
>> {
>> };
>
> 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