[xsd-users] Re: invalidated iterators

[B Hart]

Hi Boris,

Yes you were right on, I was forgetting about another thread.

Thanks for your insight.

Brian

On Tue, Jul 28, 2009 at 12:08 AM, Boris Kolpackov
<boris at codesynthesis.com>wrote:

> Hi Brian,
>
> In the future please send technical questions like these to the
> xsd-users mailing list (which I've CC'ed) instead of to me directly.
> For more information, see the Posting Guidelines:
>
> http://www.codesynthesis.com/support/posting-guidelines.xhtml
>
>
> B Hart <bhartsb at gmail.com> writes:
>
> > Hi Boris,
> >
> > In my XSD code it seems that when I use a parsing function to create an
> > object model of my XML doc, and then subsequently change some element
> value
> > and re save the XML doc, if I have a sequence iterator it becomes
> > invalidated.  If I change the name of the XML file that I save then the
> seq
> > iterator does not seem to be invalidated.  However, would prefer to not
> have
> > to create a second file.  Any ideas???
>
> The object model is passed as a const reference and is not modified by
> serialization functions. So I don't see how serializing the object model
> can invalidate any iterators that point to it.
>
> However, the following scenario can lead to the behavior that you are
> observing: You obtain an iterator for a sequence somewhere in the
> object model. In another part of your program you add or remove some
> elements from this sequence. In this case, the iterator that you
> first obtained will be invalid.
>
> If you can't find the source of the problem, feel free to send a test
> case that reproduces this and I will take a look.
>
>
> Boris
>
>
> [The rest of the email follows for reference.]
>
> > Thanks,
> >
> > Brian Hart
> >
> > Here is a bit of the code:
> >
> >
> > LA_Config_T::InputProperties_sequence& ips(la->InputProperties());
> >
> > ...
> >
> > for(LA_Config_T::InputProperties_iterator LA_iIt(ips.begin()); LA_iIt!=
> > ips.end(); LA_iIt++){
> > ...
> >
> > xml_schema::namespace_infomap map;
> > map[""].name = "";
> > map[""].schema = "LA_Config.xsd";
> > std::ofstream ofs(la->LAConfigXMLFile().c_str());
> > LA_Config(ofs, *la, map);
> > }  //error happens here when for loop iterator is accessed
>