[Gambas-user] gb3: converting structures to classes

[Randall Morgan]

Thanks for clearing that up Benoit!


2012/2/7 Benoît Minisini <gambas at ...1...>

> Le 07/02/2012 14:50, GMail a écrit :
> > On Tue, 2012-02-07 at 05:07 -0800, Randall Morgan wrote:
> >> Just restating the documentation....
> >>
> >> On Tue, Feb 7, 2012 at 5:05 AM, Bruce Bruen<bbruen at ...2308...>
>  wrote:
> >>
> >>> On Tue, 2012-02-07 at 04:07 -0800, Randall Morgan wrote:
> >>>> Actually, a Structure is a methodless class.
> >>> ggggzzzzzrrpppppppp!
> >>>
> >>> ... and you can inherit from, override and make static attributes from
> a
> >>> struct too?
> >>>
> >>> Please, lets keep things realistic here
> >
> > No, I don't think "A structure is exactly like a class that would have
> > only public variables" is the same thing as saying that a "Structure is
> > a methodless class".
> >
> > In fact, I would almost go further and say that the help should say that
> > a "structure is somewhat like a class, in that it exposes attributes
> > publicly (and in an unprotected manner) but it neither contains nor
> > exposes any functionality or feature typically associated with the
> > generally understood concept of an OO classifier."
> >
> > A class can inherit from any other gambas class (with one notable
> > exception - Form), it can have a constructor, destructor, initialisation
> > and finalization code and other special methods, it can have both
> > exposed (public or property based) data, it can contain specifically
> > differential static data, classes can override the methods of their
> > parent classes etc etc.
> >
> > I'm not having a go at you, its just that there is a bunch of mail
> > lately that seems to imply that a class is just a "fancy" structure. In
> > my opinion, it's quite different; a structure is just a "chunk of data",
> > conversely a class is much much more than that. Comparing the two is
> > like comparing penguins and pineapples.
> >
> > cheers
> > Bruce
> >
>
> Gambas structures are really Gambas objects, except that they can be
> embedded inside other objects or structures (you cannot embed a Gambas
> object inside another one).
>
> Beside that special behaviour (and two other ones in extern function
> management and stream management), Gambas makes no difference between a
> structure object and a normal object.
>
> And I have never tested inheritance and structure... Maybe not a good
> idea. :-)
>
> Otherwise, to get the real details, you have to read the interpreter
> source code! :-)
>
> Regards,
>
> --
> Benoît Minisini
>
>
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