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From: Lutz Donnerhacke <lutz@iks-jena.de>
Newsgroups: comp.lang.ada
Subject: Re: += in ada
Date: Fri, 17 Oct 2003 08:20:20 +0000 (UTC)
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* Hyman Rosen wrote:
> Lutz Donnerhacke wrote:
>> * Russ wrote:
>>>Actually, a competent programmer will define the "+" operator in terms
>>>of the ":+" operator rather than vice versa, because the ":+" is
>>>usually more efficient (since it has no need for temporaries and extra
>>>copying).
>>
>> Wrong.
>
> That's certainly the way it's usually done in C++,
> for exactly the reason stated, so a bald "wrong" is
> not terribly enlightening.

Augmented assigments need a temporary as well as ordinary assigments of
simple expressions. So your claim about unnecessary temporaries is plain
wrong.