Custom constructors

[yanickrochon]

Instead of passing an Object, it should be possible to pass a function that would act as a custom constructor. This custom constructor would be invoked before calling the base prototype and, therefore, before generating the stack trace.

Note: the Error object constructor uses this.message to generate the stack trace, therefore the message content must be set beforehand.

When using a custom constructor, this._super is provided to invoke the base type constructor, event Error itself.

For example :

var BaseError = errorFactory('BaseError', ...);
var CustomError = errorFactory('CustomError', function (message, status) {
   this.status = status || 400;

   this._super(message);

   // ex: invoke some event listener
}, BaseError);

Note: this._super(...) or this.base(...) ?

Internally, the base type constructor is invoked as

function _super() {
  baseType.apply(this, arguments);
}