On 22 Nov 2013, at 11:20, Allen Wirfs-Brock <al...@wirfs-brock.com> wrote:
> Did you check the ES6 draft grammar{1]? The answer to that should be fairly
> obvious there and if it isn't it would be good to know so we can try to make
> it clearer in the spec.
>
> [1]: http://people.mozilla.org/~jorendorff/es6-draft.html#sec-patterns
It’s pretty clear that (1) is equivalent to (2). I guess (3) is equivalent to
(1) and (2) because of the following:
RegExpUnicodeEscapeSequence[U] ::
[+U] LeadSurrogate \u TrailSurrogate
…but I was looking for confirmation.
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