Graeme Geldenhuys schrieb: > On 18 May 2010 10:12, Florian Klaempfl wrote: >> - it is one of the basic programming principles: if a result is returned >> by a subroutine, use a function > > The function might return a boolean (success/fail), or an error code > etc.. The function result doesn't need to return the new instance > created by the factory method.
I see, we should change the constructor syntax for you as well ;) > > But I guess the only solution (forced upon me now) is to use some > magic code like LCL does. An untyped variable (YUCK!!! They are as bad > as Variants!) and then type cast it inside the implementation of > CreateForm and use the 'is' operator to find out if the instance > really is a TfpgWindowBase descendant. A whole much of crap code that > wasn't needed with FPC 2.4.1. Oh well. :-/ Yes, but imo it doesn't get worse. As far as I understand CreateForm, before fpgApplication.CreateForm(TMyForm, NotAMyForm); was possible as well, so you need to check the parameters anyways. Maybe (and really only maybe) the proper solution in this case are C++ styled template methods. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
