Re: [Boost-users] Serializing a char *

Subject: Re: [Boost-users] Serializing a char *
From: Robert Ramey (ramey_at_[hidden])
Date: 2008-09-04 01:22:50

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 <ramey <at> rrsd.com> 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<Archive,
>>>> 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<Archive,
>>>> save_object_data(boost::archive::detail::basic_oarchive&, const
>>>> void*
> const [with Archive = boost::archive::text_oarchive, 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_oarchive&, 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_oarchive, T =
> MYSTRSTRUCT]
> serialize4.cpp:337: note:  void
> boost::serialization::serialize(Archive&, MYSTRSTRUCT&, unsigned int)
> [with Archive = boost::archive::text_oarchive] serialize4.cpp:345:
> note:  void serialize(Archive&, MYSTRSTRUCT&, unsigned int) [with
> Archive = boost::archive::text_oarchive]
>
> Thanks,
> Diane