​

console.clear();

class A{

  @FunctionName

   test(){

   }

​

   testCall(fnc:Function){

      console.log(fnc.functionName); // i want it display test here not only empty

     console.log(fnc.name); // i want it display test here not only empty

     console.dir(fnc);

   }

}

​

var a=new A();

a.testCall(a.test);

​

function FunctionName(target:any, key:string) {

  console.log("target"+target);

  console.log("key"+key);

  target[key].functionName = key;

}

​

​