From: "REH" <spamjunk@stny.rr.com>
Subject: Re: generics in Ada 83
Date: 13 Sep 2005 09:30:46 -0700
Date: 2005-09-13T09:30:46-07:00 [thread overview]
Message-ID: <1126629046.328151.40970@g47g2000cwa.googlegroups.com> (raw)
In-Reply-To: <4326d73a$1_1@glkas0286.greenlnk.net>
Martin Dowie wrote:
> REH wrote:
> > Is there a way to define a default for the with'd procedure in the
> > following example in Ada 83:
> >
> > generic
> > type X is private;
> > with procedure Y(Z : in X);
> > package Foo;
> >
> > I want to define a default for Y, but how can I without knowing X?
> >
> > I have a generic package that has several with'd procedures, but
> > depending on what services the package provides are use, only a few of
> > the procedures may need to be defined. I'd like to just default the
> > unused ones to stubs.
>
> Same as Ada95:
>
> generic
> type X is private;
> with procedure Y (Z : X) is <>;
> package Foo is
> end Foo;
>
> Or do you mean you want the compiler to magically insert a 'null' procedure
> if there isn't a matching procedure Y for whatever type X happens to be? If
> that's the case you can't do that. There has to be some procedure (even one
> that's only 'begin null end;') for each type.
>
> Cheers
>
> -- Martin
defining it with a box won't work. There would have to a procedure
already defined. What I want is something like:
generic
type X is private;
with procedure Y(Z : in X) is P;
package Foo
but of course P must already take into account X. With '95 I think I
could just with a generic package containing the stubs, but I can
figure out a way in '83.
Thanks.
next prev parent reply other threads:[~2005-09-13 16:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-13 13:26 generics in Ada 83 REH
2005-09-13 13:30 ` Georg Bauhaus
2005-09-13 16:25 ` REH
2005-09-13 19:23 ` Georg Bauhaus
2005-09-13 13:50 ` Martin Dowie
2005-09-13 16:30 ` REH [this message]
2005-09-13 16:41 ` Martin Dowie
2005-09-13 18:43 ` REH
2005-09-13 19:37 ` Ludovic Brenta
2005-09-13 19:53 ` REH
2005-09-13 16:56 ` Jeffrey Carter
2005-09-13 18:53 ` REH
2005-09-13 22:16 ` Jeffrey Carter
2005-09-13 22:44 ` REH
2005-09-14 8:14 ` Jean-Pierre Rosen
2005-09-14 12:40 ` REH
2005-09-14 13:15 ` Hyman Rosen
2005-09-14 14:08 ` Jean-Pierre Rosen
2005-09-14 15:23 ` Hyman Rosen
2005-09-14 15:41 ` Robert A Duff
2005-09-19 17:58 ` REH
2005-09-20 4:58 ` Hyman Rosen
2005-09-20 12:36 ` REH
2005-09-20 1:34 ` adaworks
2005-09-20 4:14 ` Jim Rogers
2005-09-21 22:58 ` Robert A Duff
2005-09-22 15:18 ` adaworks
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