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Date: Wed, 25 Feb 2004 16:33:27 -0500
From: Hyman Rosen <hyrosen@mail.com>
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Subject: Re: In-Out Parameters for functions
References: <pan.2004.02.24.01.44.30.311621@email.ro>
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Date: 2004-02-25T16:33:27-05:00
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Randy Brukardt wrote:
> "Hyman Rosen" <hyrosen@mail.com> wrote
>>Where do you find permission for Ada to not evaluate one
>>operand of an "and" or "or" expression?
> 
> 11.6(5), of course.

For the particular case of sqrt(x), where we're talking
about Ada's built-in sqrt, and the only possible side-effect
is for it to raise an exception. But if instead we have
(gnurble(x) > 0.5 and b), and the compiler knows that b is
false but has no information about what gnurble does, it
must call gnurble(x) even though the result is irrelevant.