From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,45974c4ba2f5422c
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news2.google.com!postnews.google.com!j32g2000yqh.googlegroups.com!not-for-mail
From: Phil Thornley <phil.jpthornley@googlemail.com>
Newsgroups: comp.lang.ada
Subject: Re: Hide annotations on procedures.
Date: Fri, 12 Jun 2009 06:51:20 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: 
 <46a4a9cf-a5b7-4fd7-8c79-c271cb0a93ea@j32g2000yqh.googlegroups.com>
References: <ad97349f-ddb7-4a9d-8ce6-004088016827@b9g2000yqm.googlegroups.com>
NNTP-Posting-Host: 80.177.171.182
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1244814681 10075 127.0.0.1 (12 Jun 2009 13:51:21
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Fri, 12 Jun 2009 13:51:21 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: j32g2000yqh.googlegroups.com; posting-host=80.177.171.182;
	posting-account=Fz1-yAoAAACc1SDCr-Py2qBj8xQ-qC2q
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1;
	Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727),gzip(gfe),gzip(gfe)
Xref: g2news2.google.com comp.lang.ada:6446
Date: 2009-06-12T06:51:20-07:00
List-Id: <comp.lang.ada>

On 12 June, 14:35, xorque <xorquew...@googlemail.com> wrote:
> Having failed to take the day off from learning SPARK, I've run into
> a strange problem regarding procedure annotations.
>
> I have the following in a package body:
>
> =A0 procedure C_Readlink_Boundary
> =A0 =A0 (File_Name =A0 =A0 : in String;
> =A0 =A0 =A0Buffer =A0 =A0 =A0 =A0: out String;
> =A0 =A0 =A0Buffer_Size =A0 : in File.File_Name_Index_t;
> =A0 =A0 =A0Returned_Size : out C_Types.Signed_Size_t)
> =A0 is
> =A0 =A0 --# hide C_Readlink_Boundary
> =A0 begin
> =A0 =A0 null;
> =A0 end C_Readlink_Boundary;
>
> The body of the procedure is obviously not implemented yet. The
> procedure
> itself is defined only in the body of the package, not accessible from
> outside.
> The body of the procedure is intended to be hidden from SPARK. The
> problem
> I have is that SPARK doesn't seem to get it:
>
> =A0 =A07 =A0 =A0procedure C_Readlink_Boundary
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 ^
> *** =A0 =A0 =A0 =A0Semantic Error =A0 =A0:154: The subprogram or task bod=
y
> C_Readlink_Boundary
> =A0 =A0 =A0 =A0 =A0 =A0does not have an annotation.
>
> The procedure doesn't touch any global variables. Any 'derives'
> annotation added to the procedure is rejected by SPARK (as it would
> need to
> go on the procedure specification - which doesn't exist). I've used
> the same
> pattern on functions, not procedures, and SPARK has accepted it.
>
> What have I done wrong here?

The derives annotation is certainly needed and goes immediately after
the procedure declaration - before the 'is'. (The hide goes after the
'is'.)

Are you getting it in the wrong position, or making some other error
in that annotation?

Phil Thornley