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To: "Stas Malyshev" <smalyshev@sugarcrm.com>
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Date: Wed, 15 Aug 2012 11:15:04 +0300
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Subject: Re: [PHP-DEV] Inline typecasting / typehinting for classes and interfaces
From: sv_forums@fmethod.com ("Stan Vass")

> What's wrong with instanceof? You can then throw fatal error if you
> want, it's just two lines:
>  if(!($foo instanceof Bar)) {
>  trigger_error(E_USER_ERROR, "Wrong foo!");
> }

That's 3 lines on top of the line where you assign the value, and you forgot 
the 4th line for the IDE:

-----
/* @var $foo Bar */
$foo = expression();
if(!($foo instanceof Bar)) {
   trigger_error(E_USER_ERROR, "Wrong foo!");
}
-----

Versus this:

----
Bar $foo = expression();
----

And assignment is a kinda common operation. So I hope you can see what's 
wrong with it now.

Stan