AS3 Getter and companion setter in different namespaces

I'm trying to create a property that can be set by extending classed and read publicly.

I couldn't think of a good naming convention for a protected property with a public getter, so I tried to do this:

public function get name():String{ return _name; }
protected function set name(string:String):void
{
    _name = strin开发者_Python百科g;
}

However I get the error (when trying to set name in an extending class):

1178: Attempted access of inaccessible property name through a reference with static type testing:TestComponent.

1059: Property is read-only.

If I change the setter to public, it works fine.

As far as I know AS3 doesn't allow you to mix and match, both accessors should be the same.

I generally don't supply a setter to make the property read only, and directly set _name internally. Because it's protected, it will be accessible to descendants.

You can use it like below.

public class Test extends Object {
    protected var _name:String;
    public function get name():String {return _name;}
}

public class Test2 extends Test {
    public function set name(s:String):void {
        this._name = s;
    }
}

I took a slightly different approach to achieve what I wanted:

public function get name():String{ return _name; }
public function set name(string:String):void
{
    if(!_name.length)
        _name = string;

    else throw new Error("Property \"name\" can only be defined once.");
}

Now name will be defined within the extending class, but can't be set from then on.