Re: [Boost-bugs] [Boost C++ Libraries] #1942: Pointers to elements in a std::map are not serilaized correctly

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #1942: Pointers to elements in a std::map are not serilaized correctly
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-06-08 20:49:29

#1942: Pointers to elements in a std::map are not serilaized correctly
-------------------------------------+--------------------------------------
  Reporter:  bernhard.maeder_at_[hidden]  |       Owner:  ramey        
      Type:  Bugs                    |      Status:  closed       
 Milestone:  To Be Determined        |   Component:  serialization
   Version:  Boost 1.35.0            |    Severity:  Problem      
Resolution:  wontfix                 |    Keywords:               
-------------------------------------+--------------------------------------
Changes (by ramey):

  * status:  new => closed
  * resolution:  => wontfix

Comment:

 After a lot of work, I managed to discover what the problem is.

 The following case will fail when all three of the following are true:

 a) object is untracked (map<>::value_type in your case

 b) object contains something else that is tracked

 c) The containing object is moved after being deserialized - load a map
 has to do.

 In your case this can be address by adding:

 namespace boost {                            \
 namespace serialization {                    \
 template<>                                   \
 struct tracking_level< std::map<std::size_t, dummy>::value_type >
 \
 {                                            \
     typedef mpl::integral_c_tag tag;         \
     typedef mpl::int_< boost::serialization::track_always > type;
 \
     BOOST_STATIC_CONSTANT(                   \
         int,                                 \
         value = tracking_level::type::value  \
     );                                       \
 };
 }
 }

 I haven't found any general solution.  I'll add a note to the
 documentation.

 Robert Ramey

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1942#comment:2>
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