[fpc-pascal]forward declaration of classes

[Peter Vreman]

> 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

Then it's for sure a bug ;)