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From: =?ISO-8859-1?Q?Hibou57_=28Yannick_Duch=EAne=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Package's private parts and protected types
Date: Tue, 9 Feb 2010 12:19:57 -0800 (PST)
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Date: 2010-02-09T12:19:57-08:00
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On 9 f=E9v, 20:34, Hibou57 (Yannick Duch=EAne) <yannick_duch...@yahoo.fr>
wrote:
> Synchronized-and-the-like interface types are limited, so the built-in-
> place is indeed really built-in-place (no kind of conversion allowed
> at any stage). The initializer function have to return a class wide
> and return it using an extended return statement which is required to
> return the same exact type/subtype as the one function returns.
>
> This way of doing thing is not compatible with the implementation-
> hiding requirement, as it would require the implementation type to be
> exposed in the public part, so that I could define a public function
> returning this exact type.

I forget to underline : an extension aggregate which would have
otherwise make it possible to initialize a limited class wide type in
an extended return statement, does not work here, as we are to create
a task or protected object (I do not know such a thing as extension
aggregates for Protected and Task).