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Date: Thu, 15 Oct 2015 17:21:28 +0100
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Subject: =?UTF-8?Q?Re:_[PHP-DEV]_[RFC]_Void_Return_Type_=28v0.2=2c_re=c3=b6p?=
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From: rowan.collins@gmail.com (Rowan Collins)

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Pedro Cordeiro wrote on 15/10/2015 17:14:
> I've been thinking about what PHP should do when accessing the return 
> value of a `void` function, and so far, I think the consistent thing 
> should be to get NULL, while throwing an E_NOTICE.
>
> $a = $b; //$b wasn't initiated.
>
> This does the same thing. I tried accessing what was supposed to be 
> 'nothing' ($b), and got NULL with an E_NOTICE being thrown.
>
> function myFunc() : void { ... }
> $a = myFunc();
>
> I see no reason why this should silently assign NULL to $a, 
> *specially* with "return null;" being explicitly forbidden. ... The 
> behaviour should be consistent (NULL should be accessed, as for all 
> undefined things), with an E_NOTICE.

I don't know how easy this would be to implement, but I agree that this 
would make the "void" keyword feel more meaningful.

Does the Engine have a way to know whether a return value is being used 
or discarded for optimisation purposes? If so, could that logic be 
hooked to provide the Notice?

Regards,
-- 
Rowan Collins
[IMSoP]

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