From: Ludovic Brenta <ludovic.brenta@insalien.org>
Subject: Re: recursive types and generics
Date: 02 May 2003 19:12:25 +0200
Date: 2003-05-02T19:12:25+02:00 [thread overview]
Message-ID: <rw2vfwt2rye.fsf@lbrenta.corp.emc.com> (raw)
In-Reply-To: 3eb29aa6$1_3@news.arrakis.es
How about this:
procedure Test is
generic
type Element is private;
package Sequence is
type Kind_Of_Element is (Nothing, Leaf, Seq);
type Sequence_Element (Kind : Kind_Of_Element) is private;
type Sequence is access Sequence_Element;
private
type Sequence_Element (Kind : Kind_Of_Element) is record
Next_Element : Sequence;
case Kind is
when Nothing => null;
when Leaf => Payload : Element;
when Seq => Sub_Sequence : Sequence;
end case;
end record;
end Sequence;
package My_Sequence is new Sequence (Element => Integer);
type Seq_Access is new My_Sequence.Sequence;
begin
null;
end Test;
prev parent reply other threads:[~2003-05-02 17:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-02 16:19 recursive types and generics alfonso acosta
2003-05-02 17:09 ` Robert A Duff
2003-05-02 17:12 ` Ludovic Brenta [this message]
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