[boost] Re:Serialization Library Draft # 10

From: Robert Ramey (ramey_at_[hidden])
Date: 2003-09-14 10:13:05

Jeff Garland wrote:

>Of course there are many great new features that I had to try out and that ran
>me into a couple issues with the xml output.  The first is that I can't seem
>to output a std::string name value pair:
[snip]

As described in the "Release Notes" of the documentation, XML archives don't work with 
gcc 3.2 due to a bug in that version of gcc.  I'm now working on draft # 12 and its
possible that this problem may be worked around.  It doesn't appear in gcc 3.3

>The other thing I noticed by accident is that it is possible to write an
>archive that requires name value pairs without creating one.  That is, 

>  const int anInt = 100;
>  std::ofstream ofx("test_string.xml");
>  boost::archive::xml_oarchive oax(ofx);
>  oax << anInt;
>  oax << boost::serialization::make_nvp("int_again", anInt);

>compile and executes resulting in:

>   <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
>  <!DOCTYPE boost_serialization>
>  <boost_serialization signature="serialization::archive" version="2">
>  100<int_again>100</int_again>
>  </boost_serialization>

>  I notice that trying this with strings results in a compilation error.  I
>  assume the intent is to make all types fail to compile with archives that take
>  name value pairs?

You assumption is correct. It is my intention that the xml archive trap at compile
time any attempt to serialize anything not  wrapped as a name-value pair.  I'll
look into this.

Thanks for helping with this.

Robert Ramey