I am trying to use an instance variable as a parameter value in a method, but it is giving me an error. "Parameter initializer is unknown or is not a compile-time constant"
I want to use a non-constant instance variable though, and I assume there has to be some way around this besides calling this method from another method. Here is the code I'm referring to:
public function attack(target:Fighter=this.target):void {
}
What about:
public function attack(target:Fighter):void
{
if(target == null)
target = this.target;
}
and to be honest maybe it's easier to name one of variables _target to avoid confusion. You can use target = _target; instead of this..
You cannot set an optional parameter that way. You can set optional parameters to a default value but not a reference. In this case if you want to keep it optional you could do something like this (or what @George Profenza suggested):
public function attack(target:Fighter=null):void {
target = target ? target : this.target;
}
I see that you marked a correct answer already, but I'll explain that since you are defaulting any null parameters to this.target you would benefit from using this solution so you don't have to pass null each time you call attack() i.e. - you can do attack() instead of attack(null).
public function attack(target:Fighter):void { if(target == null) target = this.target; }or you can only attack if a target has been previously set(maybe using apublic function setTarget(newTarget:Target):void, and so on. Hard to tell what would be the best solution without knowing more about your game