text: // Copyright (C) 2017 André Bargull. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  description: |
      Test if a given function is a constructor function.
  defines: [isConstructor]
  ---*/
  
  function isConstructor(f) {
      try {
          Reflect.construct(function(){}, [], f);
      } catch (e) {
          return false;
      }
      return true;
  }
  