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From: Bernard (yahoo_at_[hidden])
Date: 2003-11-13 07:17:58

I've been discovering boost::MPL and I think it's very powerful ( even
if I could not find documentations on mpl::apply and mpl::bind :-(,
is there any ?)

When I've been using tuples, I noticed that boost::tuples::elements<>
takes an int, and I think it prevents me from mpl::binding this
Is there any reason not to overload it with and mpl::int_<> argument ?

Also, I've been writing my own code similar to tuples::for_each from
tuple_ext (from boost files section) seems and it seems to fill an
obvious need, will is be released ?

Now, to my main question ! ( last three do not count :-) )
I would like to compute a tuple from a tuple of tuples.
I can do the static part of computing my resulting tuple type with
mpl. How could I fill my resulting tuple with the coresponding values
from the processed tuple ?

It seems I should be able to conditionally instanciate fetching
functions, but I do not really see how to do it and I'd hate to
discover that some booster already did it much better.

(I would like to collect the N'th element (if it exists) of each tuple
from a tuple of tuples, and have them in a resulting tuple).

Thanks for any hint.


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