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Implicit cast to another class?

Started by jamesmintram Apr 1, 2012 at 6:00 PM 2 replies 1.6k views

Original Post

Apr 1, 2012 at 6:00 PM

Hello,

Is it possible with angelcode script to create a class that can be implicitly cast to another class?
Here is an example of usage (not written in Angelcode but you should get the idea)


 class node
 {
 };
 
 class anotherNode
 {
 public:
 operator node () { return m_node; }
 
 protected:
 node m_node;
 };
 
 void needsNode ( node item ) {}
 
 anotherNode someItem;
 needsNode ( someItem ); //Here we call a function that needs a node class so someItem is implicity cast

I should also note that I am wanting to do this with references/handles not concrete objects.

Hopefully you can see what I am trying to achieve

Regards,
James Mintram

WitchLord

Apr 1, 2012 at 8:41 PM

No, this is something that is currently unavailable.

You can do it for registered classes by registering the asBEHAVE_IMPLICIT_REF_CAST, but this is not available for script classes.

Can't anotherNode inherit from the node class, rather than keep it as a member? If it inherited from the node class, then the implicit cast would work.

jamesmintram

Apr 1, 2012 at 9:23 PM

I cannot inherit from Node as it is a registered c++ class. I was hoping by wrapping it in a script class that would be inmplictly cast to a Node which would achieve the same effect for me as inheriting directly from Node.

Is there another way to achieve what I am trying to do?

If not is it likely some feature like this would be implemented in the near future?

Regards,
James Mintram

WitchLord

Apr 2, 2012 at 1:07 AM

Unfortunately not. The best that can be done at the moment is to provide a method to explicitly return the inner node.

I'll study the case and see what I can implement to support implicit cast operators in the script language.

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