From: Guillaume Melquiond (guillaume.melquiond_at_[hidden])
Date: 2008-01-14 13:33:53
Le lundi 14 janvier 2008 à 15:01 +0100, Guillaume Melquiond a écrit :
> Le jeudi 03 janvier 2008 à 17:47 +0000, John Maddock a écrit :
> > >> boost::interval<double> in(1u);
> > >> but creates a nonsense interval.
> > I've since found the issue to be specific to rounded_arith_opp: it negates
> > the value being converted even if it's an unsigned type. The attached patch
> > fixes this, and also suppresses some pesky MSVC warnings.
> I see, the behavior you experienced makes sense. I should check now why
> I did not experience it; there may be an optimization bug in GCC that
> hided it.
Replying to myself. I was too eager in accusing GCC: The mistake is
actually in the library for C99-enabled compilers. Now that I fixed it,
interval<double>(1u) returns [-4.29497e+09,1] on my computer. So rounded
conversions are now performed as they were expected (yet not intended)
to perform, but it also means that the bug will become visible with
other compilers than MSVC.
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