RE: [boost] [serialization] export macros

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2004-08-12 21:03:57

> -----Original Message-----
> From: boost-bounces_at_[hidden] 
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Rene Rivera

> [snip]
> > a look at the preprocessor library but I couldnt come up with a 
> > solution. Is there an alternative to the macros for 
> registering types?
> > (A sample program exhibiting what I am trying is attached.)
> [snip]
> > // Doesn't work (wrong number of macro arguments ):
> > //  BOOST_CLASS_EXPORT( DerivedStatus< Algo< int, double > > );
> 
> Did you try using BOOST_PP_COMMA ?? For example:
> 
> BOOST_CLASS_EXPORT( DerivedStatus< Algo< int BOOST_PP_COMMA 
> double > > );

Should be with nullary parentheses:

BOOST_CLASS_EXPORT( DerivedStatus< Algo<int BOOST_PP_COMMA() double > > );

Incidently, do we have a function argument mapping for the common case of this
type of thing?

E.g.

template<class> struct pack;

template<class T> struct pack<void (T)> {
    typedef T type;
};

BOOST_CLASS_EXPORT( pack<void (DerivedStatus< Algo<int, double > >)>::type );

Or similar?  The COMMA() trick will only work through one level of macro
expansion.

Regards,
Paul Mensonides