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From: "Gautier Write-only-address" <gautier_niouzes@hotmail.com>
Newsgroups: comp.lang.ada
Subject: Re: A case where Ada defaults to unsafe?
Date: Thu, 03 Jan 2002 23:18:07 +0000
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Date: 2002-01-03T23:18:07+00:00

>From: Hyman Rosen <hyrosen@mail.com>

>It occurs to me that there is a case where the opposite seems to
>be true. In C/C++, the && and || binary operators short-circuit,
>evaluating their right operand only if necessary. In Ada, it is
>necessary to specify "and then" and "or else" for this behavior,
>otherwise the order of evaluation of the two sides is unspecified
>if the simple "and" and "or" forms are used.

Well, you are just explaining that in both languages,
the long form (&&, "and then") stands for short circuit, so what
is your point ?...

One language I know has a problem, it is Turbo Pascal and
maybe its descendent Delphi where a compiler switch decides
for the behaviour. E.g. a {$B-} will force the short-circuit
for the rest of the source file (or the next $B switch) !
But it is another story...

Happy programming (and new year)!
____________________________________________________________
Gautier  --  http://www.mysunrise.ch/users/gdm/index.htm#Ada

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