[fpc-devel] Attn: Sven Can not use "specialize" to resolve forward declaration

[Martin Frb]

https://gitlab.com/freepascal.org/fpc/source/-/issues/39459
You wrote
 >> No, this can not and this will never work. When a generic parameter 
has a constraint that constraint /must/ be adhered to and a forward 
declaration is /not/ a valid type for such a constraint (except for 
*class* / |TObject| constraints).

Using TObject for just any class is nice here.

What to use for interface?
https://gitlab.com/freepascal.org/fpc/source/-/issues/39459#note_758496897

Sorry replied on the wrong issue.


How can I restrain a generic param, so it must be an interface, but 
leave open the exact type, so I can later use a forward declaration?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freepascal.org/pipermail/fpc-devel/attachments/20211209/d532b9b4/attachment.htm>