Re: NaN still broken on Windows builds?
| From: | Carsten Wiedmann | Date: | Sun, 24 May 2009 09:53:12 +0000 |
| Subject: | Re: NaN still broken on Windows builds? | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-44044@lists.php.net to get a copy of this message | ||
Hello,
> var_dump(NAN); // float(0), should be float(NAN)
> $realNaN = sqrt(-1);
> var_dump($realNaN); // float(NAN)
> var_dump($realNaN == $realNaN); // true, should be false, NaN should never match NaN
That's interesting. With my own 5.2.9 build (vc6), I have "false" in the
last test (comparing the variable):
| # php -n -r "var_dump(NAN);$n=sqrt(-1);var_dump($n);var_dump($n==$n);"
| float(0)
| float(NAN)
| bool(false)
With the official 5.2.9 or 5.2.10-dev builds it's "true" on the same machine
(xp sp3).
BTW: is_nan($realNaN) is working with the official build.
Regards,
Carsten