Status: Accepted
Owner: [email protected]
CC: [email protected]
Labels: Type-Bug Priority-Medium
New issue 3756 by [email protected]: Regexps: \u as identity escape
behaves differently depending on whether it's at the end of the regexp or
not
https://code.google.com/p/v8/issues/detail?id=3756
According to the ES5 spec, "\u" which is not followed by 4 hex digits is
treated as an identity escape, so it should be treated as "u".
1)
d8> var r0 = /\u/
undefined
d8> r0.test("u")
false <<< HUH?
2) Other identity escapes work as expected:
d8> var r1 = /\a/
undefined
d8> r1.test("a")
true
3) \u also works as expected if it's not at the end
d8> var r2 = /foo\ubar/
undefined
d8> r2.test("fooubar")
true
4) And for additional WTF:
d8> var r3 = /foo\u/
undefined
d8> r3.test("foou")
false
d8> r3.test("foo\\u")
true <<< WUT?
d8> r2.test("foo\\ubar")
false << This is as expected (see r2 above)
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