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Newsgroups: comp.lang.ada
Subject: Re: Lazy Evaluation [Side-Effects in Functions]
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From: Jean-Marc Bourguet <jbourguet@free.fr>
Date: 07 Nov 2001 14:24:02 +0100
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Date: 2001-11-07T14:24:03+01:00
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Florian Weimer <fw@deneb.enyo.de> writes:

> dewar@gnat.com (Robert Dewar) writes:
> 
> >> Uh, unless you do something like
> >>   Swap(A(I), I)
> >> (where A is an array, of course)
> >
> > Well yes, we all know Algol-60! (or at least I hope any
> > serious student of programming languages does). But there
> > is no special problem here. In Algol-60, the effect will be canonical,
> > depending on the exact order of statements in the body.
> 
> Even if you use two temporary variables instead of a single one (which
> is more usual, but in this case, the implementation hardly reflects
> the symmetry of the operation)?

Swap(I, A(I))

-- 
Jean-Marc