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Date: Mon, 11 Jul 2011 10:22:22 +0200
Message-ID: <CADNQb0Xe+C00RB4UDqiRw_DZzExtMcPtuscK6Fv4yGWintpinQ@mail.gmail.com>
To: =?UTF-8?Q?Johannes_Schl=C3=BCter?= <johannes@schlueters.de>
Cc: 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: hannes.magnusson@gmail.com (Hannes Magnusson)

2011/7/10 Johannes Schl=C3=BCter <johannes@schlueters.de>:
> Hi,
>
> On Wed, 2011-06-08 at 12:04 +0200, Johannes Schl=C3=BCter wrote:
>>
>> Having the behavior cleared I wonder how useful it is in practical
>> terms. A class type hint guarantees me I can do a specific call to
>> methods defined in the class/interface. The proposed type hint tells
>> me
>> I can call it in some way. It won't ensure that the signature is
>> compatible with what I expect.
>>
>> =C2=A0 =C2=A0 function foo(callable $cb) {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 $cb();
>> =C2=A0 =C2=A0 }
>> =C2=A0 =C2=A0 foo("strpos"); // This one in fact is illegal but won't be
>> prevented
>>
>> But maybe this doesn't matter as type hints purely serve documentation
>> (as E_RECOVERABLE are useless unless we make them Exceptions ...)
>> while
>> even for documentation purpose more information is needed.
>
> Any comments to this? - I didn't see an answer before the votes were
> opened.
>

Voting is open on this? I don't think I ever had the time to integrate
all the Q&A from this thread to the RFC.

If you typehint on Closure, you don't know if it takes 0 or 10
parameters either.
I don't think that is the point to know that either.

-Hannes