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,aa0ebfe6afda2b3
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,CP1252
Path: 
 g2news2.google.com!postnews.google.com!l6g2000vbo.googlegroups.com!not-for-mail
From: Phil Thornley <phil.jpthornley@googlemail.com>
Newsgroups: comp.lang.ada
Subject: 
 =?windows-1252?Q?Re=3A_SPARK_syntax_and_=93use_type=94_=3A_lack_of_featur?=
	=?windows-1252?Q?e_=3F?=
Date: Mon, 24 May 2010 16:01:08 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: <17c936fc-66ce-4bb9-ba5a-069d9ed5a2fe@l6g2000vbo.googlegroups.com>
References: <op.vc73ixt2ule2fv@garhos>
NNTP-Posting-Host: 80.177.171.182
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1274742068 24054 127.0.0.1 (24 May 2010 23:01:08
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Mon, 24 May 2010 23:01:08 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: l6g2000vbo.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 8.0; Windows NT 6.1; WOW64;
	Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR
	3.0.30729; Media Center PC 6.0),gzip(gfe)
Xref: g2news2.google.com comp.lang.ada:11945
Date: 2010-05-24T16:01:08-07:00
List-Id: <comp.lang.ada>

On 24 May, 19:41, Yannick Duch=EAne (Hibou57) <yannick_duch...@yahoo.fr>
wrote:
> Hi,
>
> I meet a strange behavior with the SPARK syntax checker (via the examiner=
).

I can't get the behaviour that you are reporting (I'm still on GPL
version 8.1.1) - can you post a complete SPARKable example?

> If I have something of the form
>
> =A0 =A0 procedure My_Procedure
> =A0 =A0 is
> =A0 =A0 =A0 =A0Who_Know_What : Who_Know_What_Type;
> =A0 =A0 =A0 =A0use type My_Type;
> =A0 =A0 begin
> =A0 =A0 =A0 =A0... bla-bla-bla ...
> =A0 =A0 end My_Procedure;
>
> it's OK.

This definitely should not be OK, 'use type' clauses should (normally)
only appear as part of a context clause.

With this code in a package body:

    type A_Type is range 1 .. 10;

    procedure My_Procedure(A : in     A_Type;
                           B : in     A_Type;
                           X :    out Integer)
    --# derives X from A, B;
    is
       Y : Integer;
       use type A_Type;
    begin
       Y :=3D Integer(A + B);
       X :=3D Y;
    end My_Procedure;

I get a semantic error (112) at the 'use type'.
"A use type clause may not appear here.  They are only permitted as
part of a context clause or directly following an embedded package
specification."

(although, of course, a use type clause never needs to reference a
type in the same package).

> While if I have something like
>
> =A0 =A0 procedure My_Procedure
> =A0 =A0 is
> =A0 =A0 =A0 =A0use type My_Type;
> =A0 =A0 begin
> =A0 =A0 =A0 =A0... bla-bla-bla ...
> =A0 =A0 end My_Procedure;
>
> Then the spark syntax checker complains =93Syntax Error reserved "IS" can=
not =A0
> be followed by "USE" here.=94

I do get that error (which is to be expected since a 'use type' clause
must follow a semi-colon).

> Is SPARK missing something or is there a rational ?

Not sure, unless you can post your complete SPARKable code?

Cheers,

Phil