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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Why is the destructor called multiple times after I declare an
 object?
Date: Mon, 11 Jan 2016 17:20:02 +0000
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Date: 2016-01-11T17:20:02+00:00
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Brian Drummond <brian@shapes.demon.co.uk> writes:

> Somehow I expected "extended return" to allocate space and "build in
> place" during the execution of the return statement.
>
> Is this something legal that Gnat doesn't take advantage of? Or is
> there a Gnat option I'm not aware of?

ARM 7.6 (17.2-17.4) ff [1]: must build in place if the full type is
(immutably) limited, or (contains components that are)
controlled. Otherwise, up to the compiler. Doesn't say anything about
extended return.

[1] http://www.adaic.org/resources/add_content/standards/12rm/html/RM-7-6.html#p17.2