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From: =?iso-8859-15?Q?Hibou57_=28Yannick_Duch=EAne=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Type of the target of an assignment shall not be abstract
Date: Mon, 15 Feb 2010 20:00:41 +0100
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Date: 2010-02-15T20:00:41+01:00
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Le Mon, 15 Feb 2010 18:05:09 +0100, Adam Beneschan <adam@irvine.com> a  =

=E9crit:
>
> This is indeed illegal, although offhand I'm not sure it should be.
You cannot create an instance of an abstract type, initialized or not, s=
o  =

assignment is unlikely to be legal. Whatever it is of instantiation or  =

assignment, this would not make no sense with an abstract type, as some =
 =

method would not be defined. Well, to be honest, one alternative could  =

have been to allow such a thing and simply disallow invocation of abstra=
ct  =

methods (Borland Turbo Pascal did this), but then, what about if the  =

object is passed as a class-wide parameter ? The method receiving the it=
  =

as a class-wide parameter may access an abstract method. Allowing  =

instantiation of abstracts and disallowing to pass it where class-wide i=
s  =

expected, would not have been clean.

-- =

No-no, this isn't an oops ...or I hope (TM) - Don't blame me... I'm just=
  =

not lucky