atom feed63 messages in net.php.lists.internalsRe: [PHP-DEV] Callable typehint
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Hannes MagnussonJun 6, 2011 12:41 pm.txt
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Ferenc KovacsMay 27, 2013 10:59 pm 
Peter CowburnMay 27, 2013 11:47 pm 
Ferenc KovacsMay 28, 2013 1:21 am 
Subject:Re: [PHP-DEV] Callable typehint
From:Stas Malyshev (smal@sugarcrm.com)
Date:Jun 6, 2011 2:16:45 pm
List:net.php.lists.internals

Hi!

Like I mentioned in the other thread (which I probably should had repeated here), a lot of libs/frameworks are using the 'Closure' typehint for callbacks.

Well, they are wrong (unless they mean to use only closures and not callbacks). But that's no reason to do wrong thing in the language too.

The problem with that is a function name as a string and array("classname", "functionname") are considered is_callable(). To get through the intentions of the Closure hint, I would have to wrap the actual callback in a closure - which doesn't make any sense.

"callable" is not actually even a type. If we make it a language construct, then why 'authenticated DB connection', 'name of readable file', 'valid stream URL', 'validated XML', 'string in UTF-8 no longer than 255 characters' or 'balanced binary tree' is not a language construct? I don't think we need to put every data check into the language, especially that it actually makes it worse - you can gracefully handle user-space check, but not a strict typing error.