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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,910a48a538936849
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!postnews.google.com!79g2000cws.googlegroups.com!not-for-mail
From: "markww" <markww@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: how to import a package
Date: 6 Dec 2006 20:14:05 -0800
Organization: http://groups.google.com
Message-ID: <1165464845.649851.312700@79g2000cws.googlegroups.com>
References: <1165371252.358817.57840@80g2000cwy.googlegroups.com>
   <u7Fdh.171644$aJ.77331@attbi_s21>
   <1165449396.112251.129200@l12g2000cwl.googlegroups.com>
   <sa4ejrc7ay7.fsf@margay.local>
NNTP-Posting-Host: 66.65.64.109
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
X-Trace: posting.google.com 1165464851 7468 127.0.0.1 (7 Dec 2006 04:14:11
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 7 Dec 2006 04:14:11 +0000 (UTC)
In-Reply-To: <sa4ejrc7ay7.fsf@margay.local>
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1;
 .NET CLR 1.1.4322; .NET CLR 2.0.50727),gzip(gfe),gzip(gfe)
Complaints-To: groups-abuse@google.com
Injection-Info: 79g2000cws.googlegroups.com; posting-host=66.65.64.109;
   posting-account=cNKOMg0AAADT2ug8oGSYYXo8bsDvrHzw
Xref: g2news2.google.com comp.lang.ada:7841
Date: 2006-12-06T20:14:05-08:00
List-Id: <comp.lang.ada>

Ok so I moved the package into another file, compiled it separately,
and it seems to import now. Looks like:

    package Node is new GenericNode(T => PERSON_REC);
    use Node;

and now I can declare variables like:

    Start : Node.Node_Ptr;

which is very excellent. Thanks for your help with that. I thought it
would be smooth sailing now but I ran into one other minor problem
related to this which I think is just a syntax problem. I've defined a
function to count the # of nodes I have like:

    function GetRecordCount(Starting_Point : Node.Node_Ptr) return
INTEGER is
    Temp : Node.Node_Ptr;
        nCount : INTEGER := 0;
        begin
            Temp := Starting_Point;
             if Temp = null then
                 return 0;
             else
                 loop
                     nCount := nCount + 1;
                     Temp   := Temp.Next_Rec;   // PROBLEM
                     if Temp = null then
                         return nCount;
                     end if;
                 end loop;
            end if;
   end GetRecordCount;

but I get an error at line:

    Temp := Temp.Next_Rec;

    expected type "Node_Ptr" defined at genericnode.ads:9, instance at
line 29

do I need to use some special syntax to do that assignment? Next_Rec is
of type Node_Ptr so I don't see why it's causing an error.

Thanks,
Mark




Brian May wrote:
> >>>>> "markww" == markww  <markww@gmail.com> writes:
>
>     markww> I thought that the following line:
>
>     markww>     package Person_List in new P (T => PERSON_REC)
>
>     markww> is just instantiating one instance of the package called
>     markww> Person_List.  So the line:
>
>     markww>     Start : Person_List.Node_Ptr;
>
> In Ada, a package is not a type (unlike in, say Java where a class is
> a type and a package).
>
> So the above defines Start to of type Node_Ptr as found in the
> Person_List package.
>
>     markww> doesn't make sense to me since it looks like 'Start' is
>     markww> being defined as pointing to Person_List.Node_Ptr, when I
>     markww> thought the right side of the colon must be a data type.
> 
> Correct.
> -- 
> Brian May <bam@snoopy.apana.org.au>