> However, $this is not a real type, and it is unclear what the advantage
of specifying $this rather than static would be from a type system level
perspective.
Perhaps not from a "type system level", but from a more broad "enforced
contract" level.
E.g. IDEs or code inspection tools can warn if a method will not return
$this.
This also means recursive calls also need to return $this instead of static.
class C {
function foo(): static {
return clone $this;
}
function bar(): $this {
return $this->foo(); // IDE can complain.
}
}
On Thu, 9 Jan 2020 at 15:07, Larry Garfield <[email protected]> wrote:
> On Wed, Jan 8, 2020, at 5:42 AM, Nikita Popov wrote:
> > Hi internals,
> >
> > I would like to propose the following RFC, which allows using "static"
> as a
> > return type:
> >
> > https://wiki.php.net/rfc/static_return_type
> >
> > While I'm personally not a fan of late static binding, we do support it
> and
> > people do use it quite heavily, so I think we should also support it in
> > return types.
> >
> > Regards,
> > Nikita
>
>
> Is "squee!" an appropriate response on the list? For interface authors
> this is a huge deal.
>
> --Larry Garfield
>
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