Re: package child question

["Matthew Heaney" <matthew_heaney@acm.org>]

In article <87mugk$sa3$1@news-hrz.uni-duisburg.de> , 
sb463ba@d250-hrz.uni-duisburg.de (Georg Bauhaus) wrote:

> with A.B;
> package body B.A is
>
> begin
>    declare
>       use A.B;  -- compiler says: "B" not declared in "A"
>    begin
>       null;
>    end;
> end B.A;
>
> This only happens if the use clause is in A.B body statements,
> there is no error message when it is in the context clause of A.B.

A name always denotes the entity with the most inner scope.  In your
case, the name "A" denotes the package B.A, because that is the A-entity
declared in the most inner scope.

> Is there a way out of this, other than choosing different names
> (which works)?

You could try doing a library-level package renames:

-- this is its own file, say ab.ads
package AB renames A.B;

-- now with the renamed package:
with AB;
package body B.A is
begin
  declare
    use AB;
  begin
    null;
  end;
end B.A;

I haven't tried compiling this, though.


--
Celebrate Darwin Day on Saturday, 12 February!

<http://www.bbc.co.uk/education/darwin/index.shtml>