Microsoft.JScript.FunctionObject.CallASTFunc C# (CSharp) Method

      private Object CallASTFunc(Object[] args, Object thisob, ScriptObject enclosing_scope, Closure calleeClosure, Binder binder, CultureInfo culture){
        Object saved_caller = calleeClosure.caller;
        calleeClosure.caller = this.globals.caller;
        this.globals.caller = calleeClosure;
        Object saved_args = calleeClosure.arguments;
        ScriptObject calling_scope = globals.ScopeStack.Peek();
        ArgumentsObject caller_arguments = (calling_scope is StackFrame) ? ((StackFrame)calling_scope).caller_arguments : null;
        StackFrame sf = new StackFrame(enclosing_scope, this.fields, new Object[this.fields.Length], thisob);
        if (this.isMethod && !this.isStatic)
          sf.closureInstance = thisob;
        globals.ScopeStack.GuardedPush(sf);
        try{
          this.own_scope.CloseNestedFunctions(sf);
          ArgumentsObject arguments = null;
          if (this.hasArgumentsObject){
            arguments = new ArgumentsObject(this.globals.globalObject.originalObjectPrototype, args, this, calleeClosure, sf, caller_arguments);
            sf.localVars[this.argumentsSlotNumber] = arguments;
          }
          sf.caller_arguments = arguments;
          calleeClosure.arguments = arguments;
          this.ConvertArguments(args, sf.localVars, 0, args.Length, this.formal_parameters.Length, binder, culture);
          Completion result = (Completion)(this.body.Evaluate());
          if (result.Return)
            return result.value;
          else
            return null;
        }finally{
          this.globals.ScopeStack.Pop();
          calleeClosure.arguments = saved_args;
          this.globals.caller = calleeClosure.caller;
          calleeClosure.caller = saved_caller;
        }
      }