Get the full name of a function given the function reference

Question

How do you get the full classpath of a static function in Actionscript, when given only the reference to the function? See the below code sample:

public class Tests {
     static function myFunc():void {}
}

var func:Function = Tests.myFunc;

trace(func.?) // should trace "Tests.myFunc"

Is this possible? Even the open source editor and debugger FlashDevelop can't do this. Try rolling over an object with a function ref, it shows the raw pointer (like 12341234) instead of the full name of the function. Of course with describeType you can get info about a type, ie. a class reference, but not when you only have a function ref. Given only a function reference, how do you get its name?

Answer 1

It's not possible in general, having only reference to the function (as mentioned in this accepted answer Actionscript - Obtain the name of the current function). There is only two ways to get the name:

1. using describeType, but in this case you have to provide the function host object. You can find example in the first answer Actionscript - Obtain the name of the current function, I modified it for the static functions as well and utilizing getSavedThis that works in the debug player only:

   var name:String = getFunctionName( staticTest );
   trace("1", name);
   name = getFunctionName( staticTest, Astest ); //Astest the name of the class that hosts staticTest function
   trace("2", name);
   
   public static function staticTest():void
   {
   
   }
   
   public static function getFunctionName( func:Function, parent:* = null ):String
   {
       if(!parent)
       {
           //works only in debug flash player
           parent = getSavedThis(staticTest);
       }
   
       var methods:XMLList = describeType(parent)..method;
       for each ( var m:XML in methods)
       {
           if (parent[m.@name] == func)
               return m.@name;
       }
       return null;
   }
   

output:

[trace] 1 staticTest
[trace] 2 staticTest

2. using getStackTrace (example in the same answer) but it works only in debug player and you have to be in the function closure.