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Date: Tue, 28 Jun 2016 12:21:58 +1000
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To: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC DISCUSSION] var_info
From: me@jesseschalken.com (Jesse Schalken)

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On Mon, Jun 27, 2016 at 3:19 AM, Fleshgrinder <php@fleshgrinder.com> wrote:

> I would like to start the discussion on the already announced var_info()
> function. Especially the following open issues should be addressed
> before going into voting:
>
> 1. Whether to output "negative zero float" for -0.0 or keep "zero
> float". This functionality was requested on Reddit but IEEE 754 actually
> says that one should ignore the difference. Detecting the negative zero
> would also require the signbit functionality from C99 (or weird hacking).
>

I think IEEE 754 only specifies that -0.0 and +0.0 be considered equal for
the purpose of numeric equality. That doesn't necessarily mean converting
to a string in some manner should produce the same result. It is already
the case that (string)(float)-0.0 === "-0" and this is how I check for -0.0
in PHP.


> 2. Whether to output "invalid object" instead of "object of class
> __PHP_Incomplete_Class" to make it more clear cut that this object is
> wonky.
>
> https://wiki.php.net/rfc/var_info
>
> --
> Richard "Fleshgrinder" Fussenegger
>
>

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