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Date: Fri, 07 Oct 2011 19:58:40 +0100
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Subject: Re: [PHP-DEV] 5.4 beta
From: glopes@nebm.ist.utl.pt ("Gustavo Lopes")

On Fri, 07 Oct 2011 18:31:42 +0100, Ferenc Kovacs <tyra3l@gmail.com> wrote:

> do we have a wiki/documentation about what exactly ended up in 5.4
> from the Closure improvements? (Rebind)
> https://wiki.php.net/rfc/closures/object-extension#privateprotected_members_scope
> is really hard to read, as it contains all of the suggested ideas and
> possible solutions, etc.
> if not, maybe someone with the required knowledge  could start working
> on adding the documentation?
>

I don't think so, but if I had to summarize the innovations in 5.4, this  
would be it:

- Closures can now have an associated scope
- Closures can now have a bound object
- Closures can now be either static or non-static

- Closures defined in a place with an active scope are scoped accordingly
- Closures defined inside an instance method (or bound closure) have a  
bound object (namely $this)
- Closures are static if defined within a static method or with the static  
keyword (static function() { ... })

static => !bound
(but it's false that !static => bound)
bound => scoped
!static && scoped => bound
(i.e., if !static, scoped <=> bound)

The bound instance and the scoped can be freely changed with Closure::bind  
and $closure->bindTo, subject to these constraints.

-- 
Gustavo Lopes