Re: -0 assigned to a FP variable

[Justin Johansson]

On 10/01/11 11:27, bearophile wrote:

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

> 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 butterfly answers back to you.

There is no bug.  Did you mean

<code>
void main() {
     double x = +0.0;
     double y = -0.0;
}
</code>  ?

Are you able to spot it?

Is it still a bug?

Cheers
Justin