Why are you extending the prototype?

[yanickrochon]

RegExp.prototype.toJSON = RegExp.prototype.toString;

Why this?

[protobi-pieter]

@yanickrochon great catch, that shouldn't be here.

It is used in a downstream application that saves and restores sets of constraints. The default behavior of RegExp.prototype.toJSON is strange, it just yields "{}"

var a = /apples/ig
JSON.stringify(a)  // "{}"
JSON.stringify(a.toString()) // "/apples/gi"