[Ext] Re: [xsd-users] XSD & Windows DLL linkage issues with std::string

[Nicolas Weidmann]

Hello Boris,

Thank you for your advice.

I threw everything away, copy / pasted the original code, removed the inheritance to std::basic_string and grepped for string<C in the XSD library headers to make sure I implemented every method and operators correctly.

And it solved the problem.

I must have missed something, but it was not related to those 4 operators, as I already had them in my initial implementation:

1. operator ==(const char*, const my_string&)
2. operator ==(const my_string&, const char*)
3. & 4. The equivalent for !=

I think I messed up with the initialization of the xsd::cxx::tree::simple_type base somewhere.

So, now everything works and links properly...

Thanks a lot for your help!

Regards,


Nicolas Weidmann
Banque Lombard Odier & Cie SA
Rue de la Corraterie 11 - 1204 Genève - Suisse
T +41 22 709 23 17
www.lombardodier.com
-----Original Message-----
From: Boris Kolpackov <boris at codesynthesis.com>
Sent: lundi, 22 juin 2026 14:28
To: Nicolas Weidmann <n.weidmann at lombardodier.com>
Cc: xsd-users at codesynthesis.com
Subject: Re: [Ext] Re: [xsd-users] XSD & Windows DLL linkage issues with std::string

Nicolas Weidmann <n.weidmann at lombardodier.com> writes:

> I wrote a wrapping class that uses, as underlying, a std::string, and
> the link errors are gone as you implied.
>
> I however now have the following issues with one of my data-bindings:
>
> unexpected enumerator encountered
>
> I will double check vs the original xsd::cxx::tree::string to see if I
> have done anything wrong...
>
> Unless you know exactly what I missed...

Not off the top of my head. But I believe this error is the result
of not being able to match any enumeration value in the generated
code. If the same worked with the original string type, then I would
look into the comparison operator (operator==) of your wrapper.
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