Q: Lonely surrogates and unicode regexps

[Marja Hölttä]

Cool, thanks for clarifications!

To make sure, as per the "intended semantics", we never allow splitting a
valid surrogate pair (= matching only one of the surrogates but not the
other), and thus we'll differ from the Java implementation here:

/foo(.+)bar\1/u.test("foo\uD834bar\uD834\uDC00"); we say "false", Java says
"true".

(In addition, /^(.+)\1$/u.test("\uDC00foobar\uD834\uDC00foobar\uD834") ==
false.)
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