Bug 79353

Summary:	Use Unicode 6.1.0 when determining whether an identifier is acceptable or not
Product:	WebKit	Reporter:	Mathias Bynens <mathias>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	UNCONFIRMED ---
Severity:	Normal	CC:	ap, barraclough, jwalden+bwo, mathias, oliver
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	All
OS:	All

Description Mathias Bynens 2012-02-23 02:48:31 PST

JavaScript currently uses an older version of the Unicode database. Here are some examples of identifiers that are currently failing because of this, even though they’re valid according to ES 5.1/Unicode 6.1:

* `var \u0cf1;` — http://mothereff.in/js-variables#%5Cu0cf1
* `var \ua7aa;` — http://mothereff.in/js-variables#%5Cua7aa
* `var \u1bba;` — http://mothereff.in/js-variables#%5Cu1bba
* `var a\ua674;` — http://mothereff.in/js-variables#a%5Cua674

Of course, there are many more.

Updating to Unicode 6.1 would improve interoperability.

Is the list of allowed characters in `IdentifierStart` and `IdentifierPart` auto-generated based on a UnicodeData.txt file, or how is this done in JavaScriptCore?