Re: Extending a third party tagged type while adding finalization

[Robert Eachus <rieachus@comcast.net>]

On Monday, December 4, 2017 at 2:58:25 AM UTC-5, Dmitry A. Kazakov wrote:

> You mean MVC using all static object? I don't think that is possible 
> with or without tools.

No, I mean/meant to have it possible to write the model, view, and controller separately, then have a tool combine the three aspects.  So the controller could be used to do multiple changes, then a call to run causes an initial call to display. The controller will also make calls to display, as will the model from time to time (modeled time in a simulation, or test harness).

The goal is not only to make it easier for the programmer to think about the different aspects while programming them, but to minimize the scaffolding that the programmer must write.  Done well, the view mode would use default values for display objects and it would be possible for the programmer/user to move things around, resize them, change fonts and colors, and save all this in a config file.
> 
> Then I don't see how finalization might be relevant here. MVC requires 
> handling dependencies, best in the form of strong and weak references 
> between the actors. That works perfectly well in Ada, actually. I don't 
> remember any problems implementing MVC or binding to MVC implementations 
> (e.g. from GTK).