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From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2006-11-04 16:36:38

> -----Original Message-----
> From: boost-bounces_at_[hidden]
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Eric Niebler

> I have a preprocessing task that exceeds my limited
> abilities. If any PP gurus want to step in and prevent me
> from hurting myself further, I would be very grateful.
> My problem is this: I want to mpl::and_ together a bunch of
> predicates.
> mpl::and_ has a limit of 4 arguments. So this is wrong:
> mpl::and_< pred1, pred2, pred3, pred4, pred5 >
> but this is ok:
> mpl::and_< pred1, pred2, pred3, mpl::and_< pred4, pred5 > >
> The challenge, should you choose to accept it, is to write
> some PP magic that, given a MAKE_PREDICATE(z, n, data) macro
> and a max arity (which is greater than 4!), generates a
> properly nested mpl::and_-ing of the predicates.

Do you have a sequence (i.e. a selection) of predicates already or are they all
"pred1", "pred2", etc.?

Paul Mensonides

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