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: 103376,81ea1855a67f537a X-Google-Attributes: gid103376,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!postnews.google.com!q21g2000hsa.googlegroups.com!not-for-mail From: Javi Newsgroups: comp.lang.ada Subject: Re: declaration of an incomplete private type before the private part Date: Fri, 1 Feb 2008 01:53:56 -0800 (PST) Organization: http://groups.google.com Message-ID: References: <5e8bc9cb-a2c1-4c9c-8308-ca8b709801f5@e23g2000prf.googlegroups.com> <47a2d8fd$0$23828$4f793bc4@news.tdc.fi> NNTP-Posting-Host: 213.229.146.17 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: posting.google.com 1201859637 17684 127.0.0.1 (1 Feb 2008 09:53:57 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Fri, 1 Feb 2008 09:53:57 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: q21g2000hsa.googlegroups.com; posting-host=213.229.146.17; posting-account=k8j1NwoAAABh1tdgXNQ0vrLWXUAxypwQ User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11,gzip(gfe),gzip(gfe) X-HTTP-Via: 1.1 garbi.gtd.es:3128 (Squid/2.4.STABLE6) Xref: g2news1.google.com comp.lang.ada:19674 Date: 2008-02-01T01:53:56-08:00 List-Id: On 1 feb, 09:49, Niklas Holsti wrote: > Javi wrote: > > My problem: I need to do a declaration such as: > > > ----------------------------------------- > > ... > > type ListNode is private; > > type List is private; > > > package IterList is new Iterators (Creator => List, > > Item => ListNode, > > getFirst => Lists.getFirst, > > getNext => Lists.getNext, > > isLast => Lists.isLast); > > > function makeIter (L : List) return IterList.Iterator; > > ... > > private: > > (complete declaration of ListNode and List) > > ----------------------------------------- > > > The problem is that I need to complete the type (ListNode and List) > > before instancing the new package. But I do not know how to do that! > > The only solution I have found is to declare the types non-private and > > then give them the complete declaration. Obviously, this solution does > > not satisfy me since I want to make the types private. > > As I understand it, you want to instantiate the Iterators package > before the "private" part, because you want to use the type > Iterator, defined in the instance, in the declaration of public > oeprations (makeIter). One way to work around this problem is to > define a new type for that purpose: > > type ListNode is private; > type List is private; > type ListIterator is private; -- Added. > > function makeIter (L : List) return ListIterator; > > private > > type ListNode is ... -- Complete declaration. > type List is ... -- Complete declaration. > > packate IterList is new Iterators (....); -- As above. > > type ListIterator is new IterList.Iterator; > > HTH, > > -- > Niklas Holsti > Tidorum Ltd > niklas holsti tidorum fi > . @ . many thanks :-)