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Date: Sun, 1 Feb 2015 10:29:26 +0100
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To: "S.A.N" <ua.san.alex@gmail.com>
Cc: internals <internals@lists.php.net>, Stas Malyshev <smalyshev@gmail.com>
Content-Type: multipart/alternative; boundary=047d7b6740b24e3b49050e03794e
Subject: Re: [PHP-DEV] Use "caller" keyword, to access object caller.
From: php@bof.de (Patrick Schaaf)

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Content-Type: text/plain; charset=UTF-8

Am 01.02.2015 01:15 schrieb "S.A.N" <ua.san.alex@gmail.com>:
>
> $holder->object->call($holder);

The way I solve this in the very few places (*) where it makes sense, is to
use __call in the holder class to implement forwarding methods that pass on
the holder object reference. The member property is NOT exposed.

Call will be like this: $holder->object_call();

Code could look something like this (untested):

class holder {
  public function __call($method, $args) {
    list ($propname, $membermethod) = explode('_', $method, 2);
    if (!property_exists($this->$propname) || !is_object($this->$propname))
// add other policy
       return null; // or any other error behaviour
    return $this->$propname->$membermethod($this, ...$args);
  }
}

(*) really just one place at the moment, tightly coupled, and not as
general as shown above. I don't see a use for the fully general case, where
the member objects would both care about knowing their holder object _and_
work with practically any holder object.

best regards
  Patrick

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