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From: Stephen Leake <Stephe.Leake@nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: Ideas for Ada 200X
Date: 04 Jun 2003 12:59:05 -0400
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18k11tm001@sneakemail.com (Russ) writes:

> > (And let's not forget that Ada *can* compute the result matrix in-place,
> > just not using the notation you prefer. It's a strange performance-oriented
> > programmer who gives up a factor of 4 for aesthetic reasons.)
> 
> But Mr. Duff says that "+=" is just "syntactic sugar" for "Add(A,B),"

Mr. Duff forgot about the Constraint_Error issues.

> and Mr. Eachus says "+=" needs a temporary to preserve A in the case
> of a Constraint_Error. 

He's right, since the language defines that behavior. But since _you_
write "Add", you get to decide what happens for Constraint_Error, so
you _don't_ need a temporary.

> So, as far as efficiency is concerned, we're screwed either way,
> aren't we?

No.

-- 
-- Stephe