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Date: Sat, 9 Jul 2016 09:03:47 +0200
Message-ID: <CADyq6sJE30RKm+Spt69FX4=uX9YxeJ6iv=bQ22U6HPD77tB4cw@mail.gmail.com>
To: Daniel Ciochiu <daniel@ciochiu.ro>
Cc: PHP Internals List <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Proposal for php7 class method return
From: ocramius@gmail.com (Marco Pivetta)

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Hey Daniel,

I've been playing around with `self` for a while (mostly dealing with
code-generators and inheritance), and what I found is that it doesn't
really make sense as a type-hint, not even in interfaces.

Besides the type-work to be done to do `function setValue($value) :
myClass`, what is the advantage of having `self`?



Marco Pivetta

http://twitter.com/Ocramius

http://ocramius.github.com/

On 9 July 2016 at 08:47, Daniel Ciochiu <daniel@ciochiu.ro> wrote:

> Hi,
>
> I have a proposal that for a given method with a return type of <self>, if
> method does not return anything than it should it's instance. It will
> reduce code by only one line, but will improve consecutive method calls.
>
> class myClass
> {
>     protected $value;
>
>     function setValue($value) : self
>     {
>         $this->value = $value;
>     }
>
>     function doubleValue() : self
>     {
>         $this->value*=2;
>     }
>
>     function getValue() : self
>     {
>         return $this->value;
>     }
> }
>
> $calculator = new myClass();
>
> $returnValue = $calculator->setValue(3)
>         ->doubleValue()
>         ->getValue();
>
> echo $returnValue;
>
> Any return defined in the methods body would override the return of the
> class instance.
>
> I am looking forward to your reaction.
> Thank you!
>
> DanielCiochiu
>

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