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Newsgroups: comp.lang.ada
Date: Tue, 25 Jun 2019 02:09:18 -0700 (PDT)
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Subject: Re: recursive map specification
From: mario.blunk.gplus@gmail.com
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Xref: reader01.eternal-september.org comp.lang.ada:56751
Date: 2019-06-25T02:09:18-07:00
List-Id: <comp.lang.ada>

On Tuesday, June 25, 2019 at 10:44:11 AM UTC+2, Egil H H wrote:
> 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

It is the first time I read about multiway_trees. Do you have a simple example ready ? Otherwise I would dig into the package docs which lack practical examples... Thanks