On Thu, Mar 21, 2024, at 9:10 AM, Robert Landers wrote:
> Hello,
>
> I'm a bit confused on inheritance. In the following example of a
> proxy, do I need to be aware of a parent's hook and handle it
> specially?
>
> class Loud
> {
> public string $name {
> get {
> return strtoupper($this->name);
> }
> }
> }
>
> class LoudProxy extends Loud
> {
> public string $name {
> get {
> // detected the parent has a hook? //
> $return = parent::$name::get();
> // do something with return //
> return $return;
> }
> }
> }
>
> what happens if the Loud class later removes its hook implementation
> (ex: moves it to the set hook)? Will my proxy now cause an error?
>
> Would simply calling $this->name call the parents hook?
Per the RFC:
"If there is no hook on the parent property, its default get/set behavior will
be used. "
so parent::$name::get() will "read the parent property", which will go through
a hook if one is defined, and just read the raw value if not. So there is no
detection logic needed, and the parent can add/remove a hook without affecting
the child.
Calling $this->name in LoudProxy's get hook will access backing property on
LoudProxy itself, ignoring the parent entirely.
--Larry Garfield
