From: Adam Beneschan <adambeneschan@gmail.com>
Subject: Re: "use" after "limited with" (GNAT bug?)
Date: Thu, 14 Aug 2014 11:37:49 -0700 (PDT)
Date: 2014-08-14T11:37:49-07:00 [thread overview]
Message-ID: <f03ffc27-3d37-4af0-b8c3-9f4bc07cc6ee@googlegroups.com> (raw)
In-Reply-To: <lsitvc$9l8$1@speranza.aioe.org>
On Thursday, August 14, 2014 11:08:47 AM UTC-7, Victor Porton wrote:
> -- p1.ads
>
> package P1 is
>
> end P1;
>
> -- p2.ads
>
> limited with P1;
> use P1;
>
> package P2 is
>
> end P2;
>
>
>
> $ gnatmake -q -c -gnatc -u -P/home/porton/t/p/default.gpr p2.ads
> p2.ads:2:05: "P1" is undefined
> gnatmake: "/home/porton/t/p/p2.ads" compilation error
>
> Why "use" does not work? Is it a bug of gnatgcc (Debian 4.9.1-4) 4.9.1?
It's illegal. You just can't USE a LIMITED WITH'ed package.
RM 10.1.2, paragraphs 19, 22:
A limited_with_clause that names a library package shall not appear:
within a context_clause for a library_item that is within the scope of a use_clause that names an entity declared within the declarative region of the library package.
From the AARM:
Reason: This prevents visibility issues, where whether an entity is an incomplete or full view depends on how the name of the entity is written. The limited_with_clause cannot be useful, as we must have the full view available in the parent in order for the use_clause to be legal.
-- Adam
next prev parent reply other threads:[~2014-08-14 18:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-14 18:08 "use" after "limited with" (GNAT bug?) Victor Porton
2014-08-14 18:37 ` Adam Beneschan [this message]
2014-08-14 18:41 ` Victor Porton
2014-08-15 0:52 ` Shark8
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