[Boost-users] Problem serializing unsigned int via save/load

16 Sep 2008

      Is there a trick or known bug with serializing an unsigned int via the split
free functions? I have a structure that contains an unsigned int, and if I
serialize with the free serialize function it works as it should. However, if I
split the serialization into save/load I get: 

boost_1_36_0/boost/archive/detail/iserializer.hpp:541: error: conversion from
`boost::serialization::is_wrapper<unsigned int>' to non-scalar type
`mpl_::bool_< true>' requested

Here's my structure and the two pieces of serialization code:

typedef struct CCSTRUCT
{
   unsigned int numRtp;
} CCSTRUCT;

Serialization #1 (works):

template<class Archive>
void serialize(Archive & ar, CCSTRUCT& it, const unsigned int version)
{
   ar & it.numRtp;
}

Serialization #2 (doesn't work):

BOOST_SERIALIZATION_SPLIT_FREE(CCSTRUCT)

template<class Archive>
void save(Archive & ar, 
          const CCSTRUCT& d, 
          unsigned int /* version */)
{
   ar << d.numRtp;
}

template<class Archive>
void load(Archive & ar, 
          const CCSTRUCT& d, 
          unsigned int /* version */)
{
   ar >> d.numRtp;
}

I need to split the serialization because there are other elements in the
structure that can't be handled in serialize(), so I would really appreciate
some help if anyone has any ideas.

Thanks,
Diane