[fpc-pascal]forward declaration of classes

[Mattias Gaertner]

On Thu, 17 Jan 2002 15:28:41 GMT
Peter Vreman <peter at freepascal.org> wrote:

> > Hi all,
> > 
> > If I forward define a class, e.g. 'TMyForwardClass = class;', in the interface section
> and
> put the real definition in the implementation section, the compiler gives a
> > 
> > test1.pas(144) Warning: test1.ppu Interface CRC changed 1718528929<>2054119697
> > 
> > but it compiles.
> > I'm not sure if this is wanted. Definitions in the implementation section should not be
> visible, but this way I could use the class internals of TMyForwardClass in an another
> unit, as if the class is defined completely in the interface section.
> > 
> > What is the bug and what should be the right behaviour?
> > 
> > I think, bug 1599 is something similar.
> 
> I guess it's a bug, but what does Delphi give?

Test1.pas(9): Type 'TMyForwardClass' is not yet completely defined


Mattias