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Date: Wed, 1 Jul 2009 18:23:55 +0100
Message-ID: <af54caaf0907011023k4c09239cj2bc2421f94437d8c@mail.gmail.com>
To: Ilia Alshanetsky <ilia@prohost.org>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] RFC: Type hinting revisited for PHP 5.3
From: paul.biggar@gmail.com (Paul Biggar)

Hi Ilia,

This is great.

On Wed, Jul 1, 2009 at 5:59 PM, Ilia Alshanetsky<ilia@prohost.org> wrote:
> I've taken a few hours this morning to port my 5.2 type hinting patch to
> 5.3. In recognition of a need for a more 'flexible' numeric type I've
> introduced (numeric) type hint that would allow bool/int/float data types as
> well as a string containing a numeric entity as identified by
> is_numeric_string(). For completion i've also added (scalar) data type that
> will allow any scalar data element.

I think this will go a long way to addressing people's concerns when
this came up previously.


> The patch is available here: http://ia.gd/patch/type_hint_53.txt

I presume the idea is that some people (if they so chose) would want
to type hint every parameter in their program. To facilitate this, I
might suggest a "mixed" hint (like in the docs), and a null hint
(though I'm not sure if it would be called "null" or "unset" or both).


Finally, I don't want to ruin this, but last time there was
disagreement over whether numbers should be coerced to the specified
types, or left alone. What does your patch do?

ie function x (int $x) { echo is_int ($x); } x ("5");



Thanks,
Paul


> It should be noted that this is not the first idea for type hints, that
> credit goes to Hannes Magnusson who had posted a similar patch on the
> internals list back in 2006. Also, back in 2008 Felipe Pena wrote a type
> hinting patch for PHP that is available on wiki.php.net.
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> PHP Internals - PHP Runtime Development Mailing List
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>
>



-- 
Paul Biggar
paul.biggar@gmail.com