[Bug 54938] Adapt supportsService implementations to cppu::supportsService

https://bugs.freedesktop.org/show_bug.cgi?id=54938

--- Comment #59 from Alexandre Vicenzi <vicenzi.alexandre@gmail.com> ---
(In reply to comment #58)
> (In reply to comment #56)
> > I tried to convert dbaccess/source/inc/apitools.hxx, but I get this:
> >
> > In member function ‘virtual sal_Bool dbaccess::OQuery::supportsService(const
> > rtl::OUString&)’:
> > ./dbaccess/source/inc/apitools.hxx:81:57: error:
> > ‘com::sun::star::lang::XServiceInfo’ is an ambiguous base of
> > ‘dbaccess::OQuery’
> >          return cppu::supportsService(this, _rServiceName);
> >
> > Do you have any idea? In this case supportsService is a macro.
>
> Multiple inheritance of the same UNO interface does happen, and you then
> need to help the compiler by static_casting this to one of the branches
> through which it is inherited.  (Though multiple inheritance of XServiceInfo
> rather smells like a design bug that should be cleaned up.)
>
> Unwind the use of IMPLEMENT_SERVICE_INFO3 in
> dbaccess/source/core/api/query.cxx, find out through which branches
> XServiceInfo is inherited, and use a static_cast around the this pointer in
> the implementation of OQuery::supportsService.

OK, I will take a look. Thanks.

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