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Date: Wed, 15 Jan 2014 15:19:45 -0500
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To: Philip Sturgeon <pjsturgeon@gmail.com>
Cc: Robert Stoll <php@tutteli.ch>, "internals@lists.php.net" <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Introducing "Array Of" RFC
From: kristopherwilson@gmail.com (Kristopher)

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On Wed, Jan 15, 2014 at 3:09 PM, Philip Sturgeon <pjsturgeon@gmail.com>wrote:

>
> Ok, ignoring the int stuff as PHP doesn't generally do that. We don't
> want to broach that topic here.
>
> As for allowing null, this feature is currently intended as a
> syntactic representation of:
>
> foreach ($foos as $foo) {
>     if (! $foo instanceof Face) {
>         throw new Exception ('AAAGGGGGHHH!');
>     }
> }
>
> You are suggesting:
>
> foreach ($foos as $foo) {
>     if (! is_null($foo) and ! $foo instanceof Face) {
>         throw new Exception ('AAAGGGGGHHH!');
>     }
> }
>
> How do people feel about that?
>
>
PHP disallows passing NULL in a function like:

function foo(MyClass $obj) {}

Unless you explicitly allow it to be null:

function foo(MyClass $obj = null) { }

The first instance will throw an error:

PHP Catchable fatal error:  Argument 1 passed to foo() must be an instance
of MyClass, null given


I think this implementation (MyClass[]) should be consistent this when
passing null.

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