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Date: Sat, 14 Feb 2015 13:03:34 +0800
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To: francois@php.net
Cc: Andrea Faulds <ajf@ajf.me>, PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] Void Return Type
From: reeze@php.net (reeze)

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HI,

On 14 February 2015 at 12:57, Fran=E7ois Laupretre <francois@php.net> wrote=
:

> > De : Andrea Faulds [mailto:ajf@ajf.me]
> > I've written a small RFC and patch to add a "void" return type:
> >
> > https://wiki.php.net/rfc/void_return_type
> >
> > Please have a read over it. I think this would be a simple, yet useful
> addition.
>
> That's a nice addition and a beginning to distinguish void from null, as =
I
> imagine the function still returns null.
>
> Now, what about making void a real zval type ? It would open a lot of
> possibilities. Unlike null, conversions from void would raise an error. I=
t
> would also be rejected as argument input type but could be used as an
> output type when arg is

passed by ref, it could be the default type for return_value (huge BC break
> here) and so on...
>
> There's a need for a real 'no value' type different from null, as null ha=
s
> too many uses. If defined correctly, it can be a powerful addition.
>

What is the benefit of passing a void value around just for return type?
and the rest of engine will have to take care of IS_VOID type,
it seems doesn't worth it.


>
> Fran=E7ois
>
>
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>


--=20
Reeze Xia
http://reeze.cn

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