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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: limited types (Was: Records that could be arrays)
Newsgroups: comp.lang.ada
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Date: Sat, 25 Feb 2006 12:06:20 +0100
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On Fri, 24 Feb 2006 15:57:46 -0600, Randy Brukardt wrote:

> Indeed, many of us think that "limited" should be the default for Ada. (It
> certainly ought to be for interfaces and tagged types, because that allows
> more uses.) Only if you *need* assignment should something be non-limited.

Right
 
> Of course, you often do need assignment. The containers are non-limited so
> that they can be composed. And that's because it doesn't make sense to have
> limited elements (as the elements have to be copied into the container).

I think that there should also be [limited] containers of limited types.
For this we need a construction model, which would allow user-defined
in-place constructors. After all Ada has always had arrays of limited
components. We have to extend this model onto user-defined containers.

I think that this would require separation of assignment from copy
constructor, as C++ does. Though the default must be that assignment is
generated from destructor and copy constructor.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de