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=unavailable autolearn_force=no version=3.4.4 X-Received: by 2002:a0c:b5c5:: with SMTP id o5mr62179976qvf.6.1561452250549; Tue, 25 Jun 2019 01:44:10 -0700 (PDT) X-Received: by 2002:a05:6830:1316:: with SMTP id p22mr428177otq.329.1561452250087; Tue, 25 Jun 2019 01:44:10 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!m24no2964926qtm.0!news-out.google.com!e20ni52qta.0!nntp.google.com!m24no2964919qtm.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Tue, 25 Jun 2019 01:44:09 -0700 (PDT) In-Reply-To: <187147dc-94fe-4019-bc42-5b214db452db@googlegroups.com> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=176.11.19.13; posting-account=uulyKwoAAAA86DO0ODu--rZtbje8Sytn NNTP-Posting-Host: 176.11.19.13 References: <187147dc-94fe-4019-bc42-5b214db452db@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: recursive map specification From: Egil H H Injection-Date: Tue, 25 Jun 2019 08:44:10 +0000 Content-Type: text/plain; charset="UTF-8" Xref: reader01.eternal-september.org comp.lang.ada:56750 Date: 2019-06-25T01:44:09-07:00 List-Id: On Tuesday, June 25, 2019 at 10:21:03 AM UTC+2, mario.b...@gmail.com wrote: > Hello, > > I want to specify a recursive map. To simplify the problem I use the example of a person and its ancestors and ancestors ... The problem does not seem special but I haven't found a solution. The approach below does not compile: > > type person is record > name : unbounded_string; > end record; > > package tree is new ordered_maps > ( > key_type => person, > element_type => tree.map -- compiler error. "tree" undefined > ); > > Any ideas ? Thanks a lot ! Is there a reason you don't use Ada.Containers.Multiway_Trees instead? -- ~egilhh