On Nov 22, 2013, at 11:02 PM, Mathias Bynens wrote: > > 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.
yes that's what the above production says. Also see the semantics for that production in http://people.mozilla.org/~jorendorff/es6-draft.html#sec-characterescape Allen
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