Re: [Boost-bugs] [Boost C++ Libraries] #3234: XML Serialization error when loading class that inherits from wstring

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #3234: XML Serialization error when loading class that inherits from wstring
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-07-01 16:04:43

#3234: XML Serialization error when loading class that inherits from wstring
-------------------------------------+--------------------------------------
 Reporter:  nitram.cero@…            |       Owner:  ramey        
     Type:  Bugs                     |      Status:  new          
Milestone:  Boost 1.40.0             |   Component:  serialization
  Version:  Boost Development Trunk  |    Severity:  Problem      
 Keywords:                           |  
-------------------------------------+--------------------------------------
Changes (by nitram.cero@…):

  * version:  Boost 1.37.0 => Boost Development Trunk

Comment:

 Ok, I've been investigating a bit more.

 Serialization in '''XML''' of nt::wstring (my std::wstring derived class)
 as a primitive makes it get loaded by a template instead of an specialized
 std::wstring function. And that reads until a space (sometimes including
 the end tag).

 If I don't define my nt::wstring class as a primitive type, and wrap the
 base (std::wstring) as a NVP, then I get a redundant tag
 (i.e: <my_value><base>the string</base></my_value>)

 Shouldn't be a wrapper to explicitly define that it's unnamed and
 shouldn't produce a tags?

 or maybe a having a "primitive_string_type" instead of "primitive_type"
 that has std::wstring and std::string specialized.



 {{{
 BOOST_CLASS_IMPLEMENTATION(nt::wstring,
 boost::serialization::primitive_type)
 }}}
 Fails, loads as with a generic template instead of std::wstring specific




 {{{
 namespace boost { namespace serialization {

 template<class Archive>
 void serialize(Archive & ar, nt::wstring &s, const unsigned int version)
 {
         ar & boost::serialization::make_nvp("base",
 static_cast<std::wstring &>(s));
 }

 } } // namespace serialization // namespace boost

 }}}
 This works but for each string I have a redundant tag just for the base.



 For now I'll have it wrapped around "<base>" tags.
 I don't know if this trac entry should be of type Bugs or Feature
 request... I'll just leave it this way, feel free to change it.

 Regards
 -Martín

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3234#comment:2>
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