Re: [Boost-users] [Boost.Serialization] shared_ptr compile-time error.

From: Robert Ramey (ramey_at_[hidden])
Date: 2008-08-03 00:43:38

string is considered a primitive type and therefore not serializable
through a pointer.  (shared_ptr<string> contains a pointer to a string.
Look in the documentation for serialization of pointers.

You can address this by wrapping string in another class just
for serialization.

Robert Ramey

Vjekoslav Brajkovic wrote:
> Hi,
>
>   I receive a compile time error when I try to serialize
> shared_ptr<string> in my class. Here are the relevant parts of this
> class:
>
> /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
>
> #include <boost/serialization/base_object.hpp>
> #include <boost/serialization/shared_ptr.hpp>
> #include <boost/serialization/string.hpp>
>
> class chunk_data : public chunk_metadata {
>
> public:
>
>    chunk_data(std::string               s);
>
>    chunk_data(
>        chunk_metadata                   metadata,
>        boost::shared_ptr<std::string>   data_ptr);
>
>    chunk_data(
>        boost::filesystem::path          path,
>        chunk_metadata::cuid_type        chunk_id);
>
>   chunk_data(
>        boost::filesystem::path          path,
>        chunk_metadata::cuid_type        chunk_id,
>        boost::shared_ptr<std::string>   data_ptr);
>
>   virtual ~chunk_data();
>
>    template <typename Archive>
>    void serialize(Archive& ar, const unsigned int version) {
>      boost::serialization::base_object<chunk_metadata>(*this);
>      ar & data_ptr_;
>    }
>
>   boost::shared_ptr<std::string>          data_ptr_;
> };
>
> /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
>
> And here are the relevant parts from compilation error.
>
> invalid application of â?~sizeofâ?T to incomplete type
> â?~boost::STATIC_ASSERTION_FAILURE<false>â?T
> error: â?~struct std::basic_string<char, std::char_traits<char>,
> std::allocator<char> >â?T has no member named â?~serializeâ?T
>
> I haven't found any relevant hints about this error neither in the
> documentation or on the boost mailing list. Also I've attached the
> compilation log. I would really appreciate any help.
>
> -Vjeko
>
>
>
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