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Subject: Re: [PHP-DEV] [RFC] Scalar Type Hinting With Casts (re-opening)
From: jocelyn.fournier@gmail.com (Jocelyn Fournier)



Le 13/07/2014 17:51, Rowan Collins a écrit :
> On 13/07/2014 16:35, Jocelyn Fournier wrote:
>>> That seems both inconsistent and less useful than a hybrid juggling +
>>> validation approach.
>>
>> Than means you find currently inconsistant than
>>
>> $foo = (int) 'abc';
>>
>> works but not
>>
>> $bar = (object) 'abc';
>>
>> ? :)
>
> Well, the ability to cast to an object at all is pretty wacky, since PHP
> has no standard base class for objects, nor any mechanism to cast to or
> from specific classes, etc.
>
> Perhaps this example is more appropriate:
>
> function wants_array(array $foo) { var_dump($foo); }
> wants_array('abc'); // Error
> wants_array( (array)'abc' ); // OK - parameter passed is array(0 => 'abc')
>
> As you can see, it's perfectly possible for the value to be cast, but
> the "type hint" does not do so, it rejects the value.

If "type hint" is doing exactly the same than explicit cast, it should 
not fail on wants_array('abc'), but give a warning about the implicit 
cast conversion.

   Jocelyn