[Boost-users] [Serialization] Std::string's pointer can't be serialized.

Subject: [Boost-users] [Serialization] Std::string's pointer can't be serialized.
From: Moch Ramis (mocramis_at_[hidden])
Date: 2010-06-30 05:26:05

Hello.

I recently try to use boost.Serialization and it works fine until i
try to serialize a string pointer. With a string pointer, the compiler
(gcc 4.4.1) can't resolve a type and print the error: "error: ‘struct
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>’ has no member named ‘serialize’"

Here a schoolish example that fails to compile:

______________________________________________________

#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/string.hpp>
#include <fstream>
#include <string>
int main()
{
  std::string* s=new std::string("some text");
  std::ofstream of("file.txt");
  {
    boost::archive::text_oarchive oa(of);
    // write class instance to archive
    oa << s;
    // archive and stream closed when destructors are called
  }
  delete s;
  return 0;
}
__________________________________________________________

and the gcc output is:

-------------- Build: Debug in Boost_Serialize_Test ---------------

Compiling: main.cpp
In file included from /usr/include/boost/serialization/split_member.hpp:23,
from /usr/include/boost/serialization/nvp.hpp:33,
from /usr/include/boost/serialization/serialization.hpp:17,
from /usr/include/boost/archive/detail/oserializer.hpp:61,
from /usr/include/boost/archive/detail/interface_oarchive.hpp:24,
from /usr/include/boost/archive/detail/common_oarchive.hpp:20,
from /usr/include/boost/archive/basic_text_oarchive.hpp:32,
from /usr/include/boost/archive/text_oarchive.hpp:31,
from /.../main.cpp:2:
/usr/include/boost/serialization/access.hpp: In static member function
‘static void boost::serialization::access::serialize(Archive&, T&,
unsigned int) [with Archive = boost::archive::text_oarchive, T =
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>]’:
/usr/include/boost/serialization/serialization.hpp:74: instantiated
from ‘void boost::serialization::serialize(Archive&, T&, unsigned int)
[with Archive = boost::archive::text_oarchive, T =
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>]’
/usr/include/boost/serialization/serialization.hpp:133: instantiated
from ‘void boost::serialization::serialize_adl(Archive&, T&, unsigned
int) [with Archive = boost::archive::text_oarchive, T =
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>]’
/usr/include/boost/archive/detail/oserializer.hpp:140: instantiated
from ‘void boost::archive::detail::oserializer<Archive,
T>::save_object_data(boost::archive::detail::basic_oarchive&, const
void*) const [with Archive = boost::archive::text_oarchive, T =
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>]’
/.../main.cpp:87: instantiated from here
/usr/include/boost/serialization/access.hpp:109: error: ‘struct
std::basic_string<char, std::char_traits<char>, std::allocator<char>
>’ has no member named ‘serialize’
Process terminated with status 1 (0 minutes, 4 seconds)
1 errors, 0 warnings
----------------------------------------------------------------------------------

I also tried this one codepad. you could see the result here:

http://codepad.org/QnR0mMVs

I don't know if it's an issue or if i'm using serialize the wrong way
but i would need to serialize strings pointers.

Best regards

Mocramis