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Date:	Tue, 24 Feb 2004 10:39:28 -0500
Message-Id:	<200402241539.i1OFdSon024698@envy.delorie.com>
From:	DJ Delorie <dj AT delorie DOT com>
To:	djgpp AT delorie DOT com
In-reply-to:	<c1fijm$314$2@nets3.rz.RWTH-Aachen.DE> (message from
	Hans-Bernhard Broeker on 24 Feb 2004 13:12:22 GMT)
Subject:	Re: Fibonacci number
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> Since negation is a well-defined operation on unsigned longs, there's
> no error involved.

This makes no sense.  *All* arithmetic operations are well defined for
all integer types, but still, POSIX requires a range error.  IMHO this
means we're meant to check the range of the number *before* folding it
to the target type.

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