some notes on SwClient and SwModify

[Bjoern Michaelsen]

Hi Miklos

On Mon, Mar 23, 2015 at 09:54:45AM +0100, Miklos Vajna wrote:
> /home/vmiklos/git/libreoffice/master-clang/sw/source/core/doc/docfmt.cxx:657:26: error: c-style cast, type=5, from='const sw::WriterListener *', to='SwClient *', recommendedFix=static_cast [loplugin:cstylecast]
>     while( 0 != ( pDep = (SwClient*)aCallMod.GetDepends()) )
>                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 1 error generated.
> 
> Additional problem is that SwClient now inherits privately from
> ::sw::WriterListener, so not even a static_cast + const_cast will make
> the compiler happy.
> 
> Could do const_cast + reinterpret_cast, but it doesn't sound like the
> right fix. What is the correct fix here? ;-)

Doing a:

 SwIterator<SwClient,SwModify> aIter(aCallMod);
 for(SwClient* pClient = aIter.First(); pClient; pClient=aIter.Next())
     aCallMod.Remove(pClient);

should work: SwIterator is required to handle removal of Client gracefully (and
there is a unittest for that now). Also, when doing more than a plain
"Remove()", something like a SwIterator<SwFrm,SwModify> etc. takes care of most
of the casting for you internally.

So for now, SwIterator<> should help getting rid of the cast errors: IMHO
GetDepends() is an implementation detail that shouldnt be public anyway.

Best,

Bjoern