text: var util = require('util');
  var BaseError = require('..')
  
  var DeepError = function(message, error_type, error_code, debug) {
      BaseError.call(this, message)
      this.error_type = error_type || 'GENERIC';
      this.error_code = error_code || -1;
      this.debug = undefined;
  };
  util.inherits(DeepError, BaseError);
  
  // 使用
  var err = new DeepError("test");
  console.log(err); // true
  
  
  