Re: Access type to member procedure of instance (Object Oriented programming in Ada)

[Brian Drummond <brian@shapes.demon.co.uk>]

On Thu, 22 Nov 2012 01:47:39 -0800, ake.ragnar.dahlgren wrote:

> I want to thank everybody for replying. I had no idea about the
> "renames" feature as Randy pointed out. Brian expressed it very well: I
> am astonished!

But heed Randy's warning : 

(I may have been confused among the discussion and speculation, but my 
understanding is this: corrections welcome!)

the Renames is legal and intended to work as demonstrated:

taking its access is ILLEGAL and only works because of an apparent bug in 
Gnat (which I for one am NOT jumping to report!). And therefore using it 
is a BAD IDEA because it may well go away in the future (as well as not 
being portable)

It might be useful to see the reports from other compilers on the 
example...

> As for the Gtkada application I have given up on implementing the MVC
> pattern using tagged types. Instead I choose the same approach as was
> done in the Ada in Denmark wiki.

I believe that uses "tagged types" internally, but it is certainly 
easier...

See also "Gate3" available at
http://sourceforge.net/projects/lorenz/
which will auto-generate the Ada framework shown on that Ada.dk page,
from your Glade UI XML file.

- Brian