Re: [boost] [Serialization] this seems wrong

Subject: Re: [boost] [Serialization] this seems wrong
From: David Abrahams (dave_at_[hidden])
Date: 2008-11-26 14:26:22

on Wed Nov 26 2008, Kenny Riddile <kfriddile-AT-yahoo.com> wrote:

> #define BOOST_CLASS_EXPORT_GUID(T, K)           \
> namespace           \
> {           \
>     ::boost::archive::detail::guid_initializer< T > const &            \
>         BOOST_PP_CAT(boost_serialization_guid_initializer_, __LINE__)
> \
>         = ::boost::serialization::singleton<            \
>             ::boost::archive::detail::guid_initializer< T >            \
>           >::get_mutable_instance().export_guid(K);            \
> }
>
> with:
>
> #define BOOST_CLASS_EXPORT_GUID(T, K)           \
> namespace           \
> {           \
>     ::boost::archive::detail::guid_initializer< T > const &            \
>         BOOST_PP_CAT(boost_serialization_guid_initializer_, T)
> \

That will only work if T is a simple identifier or number.  A name like
std::pair<int,int> would fail.

I don't remember offhand whether class template specializations get
exported by Boost.Serialization, but it seems to me that this doesn't
need to be so hard in any case.  You can probably make the
namespace-scope variable a static member of a class template and use an
explicit instantiation to generate it.  If it works, there's no need for
an unnamed namespace and no name clashes.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com