RegExps that don't modify global state?
andrea.giammarchi at gmail.com
Tue Sep 23 07:37:23 PDT 2014
specially when you `yield` around, who knows what happens ... but yes, this
looks like the best option to me too so +1
On Tue, Sep 23, 2014 at 3:35 PM, C. Scott Ananian <ecmascript at cscott.net>
> On Tue, Sep 23, 2014 at 10:04 AM, Claude Pache <claude.pache at gmail.com>
> > Another idea is to to define a variant of the `RegExp.prototype.exec()`
> method, that does the Right Thing (doesn't read/write stuff on the RegExp
> instance, nor on the RegExp global, nor I don't know where):
> > RegExp.prototype.run (str, params):
> > Do what is currently specified for `RegExp.prototype.exec`,
> except that:
> > * global, sticky and lastIndex properties are read and
> written on `params` instead of `this`
> > * implementations are not allowed to extend that method in
> order to mess with `RegExp`, etc.
> > All other (legacy) methods are rewritten in terms of `RE.p.run` (in the
> current ES6 draft, they are mostly written in terms of `RE.p.exec`).
> +1. Deprecating the side-effects of the legacy methods might be tricky
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