From: keld.nielsen@agip.it (Keld Lund Nielsen)
Subject: Re: Visibility problems in Parent.Child configuration
Date: 1 Aug 2002 00:51:18 -0700
Date: 2002-08-01T07:51:18+00:00 [thread overview]
Message-ID: <383f908a.0207312351.b2d5c36@posting.google.com> (raw)
In-Reply-To: 719a5d07.0207310257.63c9645@posting.google.com
t_wolf@angelfire.com (Thomas Wolf) wrote in message news:<719a5d07.0207310257.63c9645@posting.google.com>...
> keld.nielsen@agip.it (Keld Lund Nielsen) wrote in message news:<383f908a.0207300341.1047c075@posting.google.com>...
> > Dear All,
> >
> > a question regarding type visibility. The configuration is as follows:
> >
> > ----file Parent.ads:
> > with Ada.Numerics.Generic_Elementary_Functions;
> > package Parent is
> >
> > package Float_64 is
> > type Instance is digits 15;
> > for Instance'Size use 64;
> > package Operations is
> > new Ada.Numerics.Generic_Elementary_Functions( Instance );
> > end Float_64;
> >
> > end Parent;
> >
> > ----file Parent.Generic_Child.ads:
> > generic
> > type Instance is private;
> >
> > package Parent.Generic_Child is
> > --void...
> > end Parent.Generic_Child;
> >
> >
> > Then I create a test system with the structure:
> >
> > Test.Parent.Child
> >
> > but when I try to create an instance of Generic_Child or just declare
> > a subtype of the Parent.Float_64.Instance, then the compiler protests
> > and gives the message that Float_64 is not in Parent!
> >
> > Moreover, when instantiated from a simple package - say "my_package" -
> > then it works perfectly, yet not from the "Test.Parent.Child".
>
> That's because if you do e.g.
>
> package Test.Parent.Child is
>
> subtype My_Float is Parent.Float_64.Instance;
>
> end Test.Parent.Child;
>
> the name "Parent" refers to package "Test.Parent", not
> to package "Parent". To refer from within "Test.Parent" or
> one of its children to the top-level package "Parent", use
> "Standard.Parent". E.g.
>
> package Test.Parent.Child is
>
> subtype My_Float is Standard.Parent.Float_64.Instance;
>
> end Test.Parent.Child;
>
> should work.
It DOES work - thank you very much.
Cheers
Keld
prev parent reply other threads:[~2002-08-01 7:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-30 11:41 Visibility problems in Parent.Child configuration Keld Lund Nielsen
2002-07-30 19:04 ` Robert A Duff
2002-07-31 10:01 ` Keld Lund Nielsen
2002-08-01 19:09 ` Stephen Leake
2002-07-31 10:57 ` Thomas Wolf
2002-08-01 7:51 ` Keld Lund Nielsen [this message]
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