Backwards compatibility and U+2E2F in `Identifier`s

Mathias Bynens mathias at qiwi.be
Thu Aug 22 21:51:48 PDT 2013


On 19 Aug 2013, at 11:25, Mathias Bynens <mathias at qiwi.be> wrote:

> After comparing the output, I noticed that both regular expressions are identical except for the following: ECMAScript 5 allows U+2E2F VERTICAL TILDE in `IdentifierStart` and `IdentifierPart`, but ECMAScript 6 / Unicode TR31 doesn’t.
> 
> Was this potentially breaking change intentional? I’m fine with disallowing U+2E2F, but only if we’re sure it doesn’t break any existing code.

Follow-up: since this thread is being ignored, I filed <https://bugs.ecmascript.org/show_bug.cgi?id=1802>.


More information about the es-discuss mailing list