-0 assigned to a FP variable
bearophile
bearophileHUGS at lycos.com
Sun Jan 9 16:27:11 PST 2011
A bug I've introduced once in my D code, are you able to spot it?
void main() {
double x = +0;
double y = -0;
}
The bug: 'y' isn't the desired double -0.0
To avoid this bug DMD may keep the -0 and +0 integer literals represented in two distinct ways, so they have two different values when/if assigned to a floating point. (But here D will behave a little differently from C).
An alternative is to just add a warning to DMD.
A third possibility is to just ignore this probably uncommon bug :-)
Bye,
bearophile
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