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Date: Sat, 21 Feb 2015 09:54:55 -0800
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To: Zeev Suraski <zeev@zend.com>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] Coercive Scalar Type Hints
From: pierre.php@gmail.com (Pierre Joye)

On Sat, Feb 21, 2015 at 9:51 AM, Zeev Suraski <zeev@zend.com> wrote:
> [Resending with the correct Subject line :)]
>
> ---
>
> All,
>
>
>
> I=E2=80=99ve been working with Fran=C3=A7ois and several other people fro=
m internals@
> and the PHP community to create a single-mode Scalar Type Hints proposal.
>
>
>
> I think it=E2=80=99s the RFC is a bit premature and could benefit from a =
bit more
> time, but given the time pressure, as well as the fact that a not fully
> compatible subset of that RFC was published and has people already
> discussing it, it made the most sense to publish it sooner rather than
> later.
>
>
>
> The RFC is available here:
>
>
>
> wiki.php.net/rfc/coercive_sth
>
>
>
> Comments welcome!

This does not provide what I consider as the best compromise. An
optional per file/package strict mode and a fully compatible with
existing mode.

However here are some comments:

Integer STH (int):
=E2=80=9C42.0=E2=80=9D should not be accepted. This is a float not an integ=
er. It
introduces edge cases I would rather avoid (precision setting f.e.,
imagine "42.000001" or "42.0001"?)

Boolean STH (bool):
this is by far too weak. How strings could be consider as valid, how?
"true" > Boolean true? I suppose then "false" will be boolean false?
What's is the boolean value of float 0.5?
At the very least only integer should be accepted, 0 > false, anything >=3D=
1 true

Changes to Internal Functions:
I am generally speaking against changing them by default, this is a
too big BC break.

This RFC is also not complete. A test should be provided to valid the
changes against existing applications. I suspect the impact may not be
as small as we think. I can be wrong here but tests will tell me how
wrong I could be :)

And finally, this RFC only proposes one solution, so competitive RFCs
are still required to actually represent alternatives.

Cheers,
--=20
Pierre

@pierrejoye | http://www.libgd.org