Re: [Boost-users] Serializing a char *

4 Sep 2008


      Look at the definition of the macros .. SPLIT_FREE.  It defines
a serialization function in terms of save/load.  So defining  your
own serializaton function is redundant (and ambiguous)

Robert Ramey

Diane wrote:
...
Robert Ramey  writes:
...
Not at all true.  serialize is called at each point.  If ..SPLIT is
used then a standard serial.ize function is inserted whch calls
save/load for that (and only that) structure.
Robert Ramey
Awesome, thanks!
I found a similar piece of code in greg_serialize.hpp that I'm trying
to work from, but I get compile errors even if I'm not doing anything
in save/load:
error: call of overloaded `serialize(boost::archive::text_iarchive&,
MYSTRSTRUCT&, const boost::serialization::version_type&)' is ambiguous
Is there any chance you can spot what I'm doing wrong in my code?
typedef struct MYSTRSTRUCT
{
  char *chstar;
} MYSTRSTRUCT;
BOOST_SERIALIZATION_SPLIT_FREE(MYSTRSTRUCT)
template<class Archive>
inline void serialize(Archive & ar,
                     MYSTRSTRUCT & d,
                     const unsigned int file_version)
{
 split_free(ar, d, file_version);
}
template<class Archive>
void save(Archive & ar,
         const MYSTRSTRUCT & d,
         unsigned int /* version */)
{
 int i = strlen(d.chstar);
}
template<class Archive>
void load(Archive & ar,
         MYSTRSTRUCT & d,
         unsigned int /*version*/)
{
  int i;
}
And then it's used in serialize() for the struct that contains a
   MYSTRSTRUCT: ar & it.strstruct
Here's the full compiler output:
boost_1_36_0/boost/serialization/serialization.hpp: In function `void
boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with
Archive = boost::archive::text_iarchive, T = MYSTRSTRUCT]':
boost_1_36_0/boost/archive/detail/iserializer.hpp:152:   instantiated
from `void boost::archive::detail::iserializer
...
...
...
load_object_data(boost::archive::detail::basic_iarchive&, void*,
unsigned
int) const [with Archive = boost::archive::text_iarchive, T =
MYSTRSTRUCT]' serialize4.cpp:80:   instantiated from here
boost_1_36_0/boost/serialization/serialization.hpp:133: error: call of
overloaded `serialize(boost::archive::text_iarchive&, MYSTRSTRUCT&,
const boost::serialization::version_type&)' is ambiguous
boost_1_36_0/boost/serialization/serialization.hpp:73: note:
candidates are: void boost::serialization::serialize(Archive&, T&,
unsigned int) [with Archive = boost::archive::text_iarchive, T =
MYSTRSTRUCT]
serialize4.cpp:337: note:  void
boost::serialization::serialize(Archive&, MYSTRSTRUCT&, unsigned int)
[with Archive = boost::archive::text_iarchive] serialize4.cpp:345:
note:  void serialize(Archive&, MYSTRSTRUCT&, unsigned int) [with
Archive = boost::archive::text_iarchive]
boost_1_36_0/boost/serialization/serialization.hpp: In function `void
boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with
Archive = boost::archive::text_oarchive, T = MYSTRSTRUCT]':
boost_1_36_0/boost/archive/detail/oserializer.hpp:144:   instantiated
from `void boost::archive::detail::oserializer
Thanks,
Diane