Accessors shadowing properties

[cpriest]

Code needs to be changed such that accessors shadow properties, unless accessed within a guard state which could only occur from within the already executing accessor.

When accessed when a guard is active, then the property should be returned.

[cpriest]

Accessors will shadow properties such that if a property named $foo is declared and an accessor for $foo is declared, the accessor will be used instead, only the accessor will have direct access to the underlying property.

class TimePeriod {
    private $Seconds;

    public $Seconds {
        get() { return $this->Seconds; /* Accesses the private $Seconds directly */ }
        set($x) { $this->Seconds = $x; /* Accesses the private $Seconds directly */ }
    }
}

$o = new TimePeriod();
$o->Seconds = 45;  /* Calls set accessor */
echo $o->Seconds;  /* Calls get accessor */

[cpriest]

Run into an issue w/ moving the accessor_info structure into the property structure. With interfaces you can't define a property without it generating a violation error. So if we want to continue down this path we will have to over-ride the interface checking code to ignore property_info which has an ai pointer. Then this may lead to other future problems because now interfaces will technically have property_info structures... thoughts?

[nikic]

With accessors we begin to allow defining properties via interfaces, don't we? So the property_info should be present in some way (just more restricted), shouldn't it? I don't really know how the interfaces are currently handled, so I can't say for certain, but at least it sounds reasonable :)

[cpriest]

Yeah right now any property_info showing up in an interface causes it to throw an error because you can't have properties in interfaces. I'll just need to modify the error check that it ignores a property_info if it's an accessor.

[cpriest]

Fixed by b04e5b0