Re: [boost] Re: [1.32 Release] MPL has been merged into the main trunk

From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2004-09-05 05:18:28

Eric Niebler writes:
> Aleksey Gurtovoy wrote:
> > Eric Niebler writes:
> >
> >>Oh. How do I make my code work with old versions of MPL and new? There
> >>is no mpl/version.hpp or a macro I can test for conditional compilation
> >>AFAICT. I'll have to avoid both mpl::apply_if and mpl::eval_if and roll
> >>my own. :-(
> >
> >
> > As Joaquín already replied, you can test BOOST_VERSION.
> >
>
> Thanks, Aleksey. Would there be any benefit to having a MPL-specific
> version macro? The iterator adaptors library has
> BOOST_ITERATOR_ADAPTORS_VERSION, for instance.

I'm not sure why. Unless the library has its own release cycle (like Spirit),
I don't see any benefit in having a library-specific macro.

> >
> >>Is there a doc to help people migrating from the old to the new MPL? A
> >>list of differences?
> >
> >
> > Like I mentioned in my original announcement, yes, it was forthcoming.
> > Posted now.
> >
>
> Very helpful, thank you. I hope this doc is part of the 1.32 release.

Definitely.

> Also, the references to apply_if in the mpl documentation need to be
> changed to eval_if.

The docs are still pending a major upgrade which will reflect all the
changes.

--
Aleksey Gurtovoy
MetaCommunications Engineering