What's the trick to inheriting from a Dictionary in AS3?

Question

Given the following code:

import flash.utils.Dictionary;

import mx.collections.ArrayCollection;
import mx.controls.Alert;

public class CDictionary extends Dictionary
{
    public function CDictionary(weakKeys:Boolean=false)
    {
        super(weakKeys);
    }
}

this raises Error #1056:

m_cdictNearIDs = new CDictionary();
m_cdictNearIDs[4] = "f";

but this doesn't:

m_cdictNearIDs = new Dictionary();
m_cdictNearIDs[4] = "f";

(In each case, it's a member variable that's declared to be of the same type it's instantiated as.) Wth? What's the trick to inheriting from dictionary? Thanks!

score 6 · Accepted Answer · answered Nov 13 '12 at 16:49

6

You must define your class as dynamic:

package
{
    import flash.utils.Dictionary;

    public dynamic class CDictionary extends Dictionary
    {
        public function CDictionary(weakKeys:Boolean=false)
        {
            super(weakKeys);
        }
    }
}

answered Nov 13 '12 at 16:49

Jason Sturges

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Well, apparently it actually depends on the compiler you're using; see the second part of this post: http://stackoverflow.com/questions/8502204/spark-lifecycle-changes-between-flex-4-5-and-4-6 – RIAstar Nov 13 '12 at 16:52
I'm very surprised at the whole thing. Well, that's a lot simpler than what I was expecting. Thanks man. – Panzercrisis Nov 13 '12 at 16:55
1

Classes are `sealed` by default. – Jason Sturges Nov 13 '12 at 17:04

What's the trick to inheriting from a Dictionary in AS3?

1 Answers1