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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: limited agregate and limited components default initialization
Date: Sun, 1 Apr 2018 22:42:48 -0500
Organization: JSA Research & Innovation
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"Jean-Claude Rostaing" <00120260a@gmail.com> wrote in message 
news:29943b13-00d1-443a-82f2-f55272770109@googlegroups.com...
> the smart pointer is NOT limited, but ITEM_TYPE is. Simply because I want 
> to accept as many type as possible.
>
> generic
>   type Item_type(<>) is limited private;
> package Pointers is
>   type Accessor_type(Data: not null access Item_type) is limited private 
> with Implicit_Dereference => Data;
>   type Smart_Pointers(<>) is private;
>   NULL_ACCESS: Constant Smart_Pointers;
>
> I could ask a constructor as a parameter, but it would be stupid since 
> clients whou would want to instanciate with a limited type, won'obviously 
> wouldn't be able to provide a constructor.
>
> I'm waiting for a solution... Randy the savior ?

A limited type can have a constructor function -- it just has to really 
construct the type, not copy it as you are doing in your examples. It won't 
work to solve *every* problem, but it will solve most. (Dmitry is a little 
too pessimistic in his assessment.)

               Randy.