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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Containers - nontrivial element access
Newsgroups: comp.lang.ada
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Date: Wed, 3 Oct 2007 10:26:32 +0200
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Date: 2007-10-03T10:26:34+02:00
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On Wed, 03 Oct 2007 00:22:24 GMT, Jeffrey R. Carter wrote:

> You must. C++ is based on widespread use of reference semantics; Ada on 
> value semantics.

How so? Ada abstracts by-value/reference issue away (except for some
special cases). Whether an in-out parameter is passed by reference or by
value is not a question of sematic in Ada.

> Any non-trivial comparison compares reference semantics 
> to value semantics, also known as apples to oranges.

This is IMO utterly wrong. The semantics of swapping element's fields is
well-defined independently on the way of access. In question in not the
semantics of, but the syntax sugar, namely an array-like indexing of the
container.

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