Function enableClassCheck

_benchmarks/sample_echarts.js:8078–8089

* Implements `CheckableConstructor` for `target`. * Can not use instanceof, consider different scope by * cross domain or es module import in ec extensions. * Mount a method "isInstance()" to Clz. * * @usage * ```ts * class Xxx {} * type XxxConstructor = typeo

(target)

     */

    function enableClassCheck(target) {
      var classAttr = ['__\0is_clz', classBase++].join('_');
      target.prototype[classAttr] = true;

      if ("development" !== 'production') {
        assert(!target.isInstance, 'The method "is" can not be defined.');
      }

      target.isInstance = function (obj) {
        return !!(obj && obj[classAttr]);
      };
    } // superCall should have class info, which can not be fetch from 'this'.
    // Consider this case:
    // class A has method f,
    // class B inherits class A, overrides method f, f call superApply('f'),