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Date: Wed, 8 Jun 2011 09:31:26 -0400
Message-ID: <BANLkTi=EcfD_gmmSHJ57OeiWdx9+9wS2mQ@mail.gmail.com>
To: Hannes Magnusson <hannes.magnusson@gmail.com>
Cc: =?ISO-8859-1?Q?Johannes_Schl=FCter?= <johannes@schlueters.de>, 
	Stas Malyshev <smalyshev@sugarcrm.com>, "Matthew Weier O'Phinney" <weierophinney@php.net>, internals@lists.php.net
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Subject: Re: [PHP-DEV] Callable type
From: ircmaxell@gmail.com (Anthony Ferrara)

> No default values, other then NULL allowed.
> Otherwise we would need to support array("classname", "methodname")
> too, and then people would want default array values for array
> typehinting etc etc etc.

Unless I mis-read what you said, we already have default array values
for array type-hinting:

function foo(array $array =3D array('bar', 'baz')) {
	var_dump($array);
}

foo();

foo(array());

Works perfectly for me on 5.3.6...

2011/6/8 Hannes Magnusson <hannes.magnusson@gmail.com>:
> 2011/6/8 Johannes Schl=FCter <johannes@schlueters.de>:
>> On Tue, 2011-06-07 at 12:12 -0700, Stas Malyshev wrote:
>>> Hi!
>>>
>>> > https://wiki.php.net/rfc/callable
>>>
>>> It is good there's an RFC. However it seems to lack code examples. I
>>> understand it may be obvious to the proposers how it looks like, but
>>> it'd be nice to have the actual example there as it is done nearly
>>> everywhere else.
>>
>> The RFC is missing information about what happens in codebases which
>> already have a "callable" type declared. Will that be prevented or will
>> they hit a runtime error? ("callable expected, callable type found")
>
> You mean an interface/class with that name?
> The error would be 'expected instanceof callable, string/array/closure re=
cieved.
>
> gettype("strpos") will still return a string, not callable.
>
> A callable wouldn't be fully featured type.
>
>> What about default values? Will
>> =A0 =A0function foo(callback $cb =3D 'strpos') { }
>> be valid?
>
> No default values, other then NULL allowed.
> Otherwise we would need to support array("classname", "methodname")
> too, and then people would want default array values for array
> typehinting etc etc etc.
>
>
>
>> The information on reflection is limited. what shall
>> Reflection::Parameter::getTypehint() return? Will that method allow to
>> differ between a class type and this "magic"?
>
> There is no such method anymore :)
>
>
>>
>> What about ARGINFO? Will internal functions be able to define this type
>> via ARGINFO? How will this be reported in `php --rf function`?
>
> I didn't include arginfo in the patch, but good point. It should
> probably be included.
> As Felipe pointed out, ext/reflection hasn't been updated.
> It should return [ callable $foobar ], just like with any other typehint
>
> -Hannes
>
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