Calling inherited constructor

Question

Is it possible to call the inherited Constructor from a Subclasses Constructor?

This DOES work, but, note I had to create a helper function called constructBase() which seems round about:

public class Base { public var num : int = 5;

 function Base() {}
 function Base(num : int) { 
     this.constructBase(num); 
 }    
 function constructBase(num : int) {
     this.num = num;
 }

}

public class Sub extends Base { function Sub(num : int) { super.constructBase(num); } function print() { Debug.Log(this.num); } }

This is more along the lines of what I'd expect to be able to do, but this doesn't work, it will print 5 when creating an instance of the subclass.

public class Base { public var num : int = 5;

 function Base() {}
 function Base(num : int) { 
     this.num = num;
 }    
 function constructBase(num : int) {
     this.num = num;
 }

}

public class Sub extends Base { function Sub(num : int) { Base(num); } function print() { Debug.Log(this.num); } }

Answer 1

Answer by DaveA · Mar 12, 2012 at 11:12 PM

Did you try

 super(num);  // where 'super' is a reserved word

http://msdn.microsoft.com/en-us/library/ezts5hx6.aspx

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Answer 2

Answer by monkeyThunk · Mar 12, 2012 at 10:06 PM

Sorry, a little more readable:

Does work:

public class Base { public var num : int = 5;

 function Base() {}
 function Base(num : int) { 
     this.constructBase(num); 
 }    
 function constructBase(num : int) {
     this.num = num;
 }

}

 public class Sub extends Base {
 function Sub(num : int) {
     super.constructBase(num);
 }
 function print() {
     Debug.Log(this.num);
 }

}

Does NOT work:

 public class Base {
 public var num : int = 5;
 
 function Base() {}
 function Base(num : int) { 
     this.num = num;
 }    
 function constructBase(num : int) {
     this.num = num;
 }

}

 public class Sub extends Base {
 function Sub(num : int) {
     Base(num);
 }
 function print() {
     Debug.Log(this.num);
 }

}

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Answer 3

Answer by monkeyThunk · Mar 12, 2012 at 11:26 PM

Hey that works, thanks!

Is Unity Javascript in fact JScript ? That would be really useful to know!

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Calling inherited constructor

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