On 24 Dec 2009, at 05:27, Bee Jay wrote: > I'm now studying Qooxdoo (JS framework) to make ExtPascal-like tool based on > it. Qooxdoo's OO implementation has mixin feature > (http://en.wikipedia.org/wiki/Mixin). Since this feature is not provided by > object pascal language, I have trouble writing the library wrapper. For the > first step, maybe I just could skip the feature. But this would prevent > custom widget creation of Qooxdoo from pascal. Somehow, I'm curious about it > since QWT (qooxdoo for GWT) is able to provide mixin in Java which also > doesn't support mixin. So I think there must be a way to implement it in > Pascal as well.
From the wikipedia page you linked above: "Interfaces combined with aspect-oriented programming can produce full fledged mixins in languages that support such features, such as C# or Java." I'm not aware of any existing AOP framework for Pascal. > Can someone tell me how to implement "fake" mixin feature in pascal? I think the regular way to do this in Object Pascal is via implements-style delegation (which doesn't really fake mixins; I think it provides exactly the same functionality, just using a slightly different concept). I don't think that's already fully functional in FPC, but Florian and Sergei (Gorelkin) have recently improved it quite a bit. Jonas_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
