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I am starting to get used to the fact that some specialist software,
which doesn't have the benefit of a massive testing base, doesn't do
what it says on the tin. The most recent one being some SAN software
that, despite its only real job being to hold a sequences of bits in
*precisely* the same order was when they were put down, err, doesn't.
Random flip-flop a-go-go. *sigh*
But that is a diffwerent hate. And at leats the developers are
responsive.
However gcc has *masses* of testing. Masses. It is, probbaly, the most
widely used compiler in the world or, if not, close. [0]
I have this code. It is fairly crufty because I've spent the last two
working days (well, 1 and a half including this morning) rewriting it
and rewriting it and cursing myself for inexplicably having a 2 day
braino.
Yes. I blamed myself. As Klortho's advice number 11907 says
-*-
Looking for a compiler bug is the strategy of LAST resort.
LAST resort.
-*-
And this was a potential mass of fence post erros and a whole other
county things.
while (i=files()) {
if (_start<0) _start = i;
if (_end<0) _end = i;
if (_end<i-1 || i<0) {
if (_start != _end) {
cerr << _start << "-" << _end;
} else {
cerr << _start;
}
if (i>=0) {
cerr << ", ";
}
_start = i;
}
_end = i;
if (i<0) break;
//cerr << "";
}
The code is designed to take a list of numbers such as
1,2,3,4,6,8,9,11
and turn them into
1-4, 6, 8-9, 11
Which is all well and good. Except, well, notice the commented out
thing at the bottom? If I uncomment it, it works perfectly. If it's
commented than it all goes tits up and never recognises the end of a
sub-sequence.
*sigh*
And turning off O2 optimisation doens't work either. I'm wondering if
it's some reserved token problem based on _end. Hrrmm, no. Changing it
to _foo doesn't work either.
My god, it really is shite. I hate you gcc. May a thosuand hairy backed
baboons violate your ocular cavities.
Simon
[0] Warning, contains traces of arbitary numbers and wild speculation
--
gap wearing anarchist
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