[fpc-devel] interfaces vs classes in dll

[Marc Weustink]

Mattias Gaertner wrote:
> Lazarus has the IDEIntf, the API for IDE plugins.
> 
> What is better in this case: classes or interfaces?
> What if someday there are packages? 
> What if someday there is a closed source dll plugin?

3x Interfaces (you need a shared memmanager in this case)

Additional advantage with interfaces is that you can have different 
versions of an interface implemented by the same class
I can imagine that some interface needs to be extended someday, then 
adding a newer version (=copy + new guid + extention) of the interface 
won't break older plugins.

Marc