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https://issues.apache.org/jira/browse/JEXL-331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Biestro closed JEXL-331.
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> Please document \uXXXX escape sequence
> --------------------------------------
>
> Key: JEXL-331
> URL: https://issues.apache.org/jira/browse/JEXL-331
> Project: Commons JEXL
> Issue Type: Bug
> Affects Versions: 3.1
> Environment: N/A
> Reporter: David Costanzo
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.2
>
>
> One of my JEXL programmers discovered an undocumented feature of JEXL that
> they could use the Java-style {{\uXXXX}} escape sequence in string literals
> (this might be JEXL-22). This is useful enough to be worth documenting.
> It's not clear to me if the {{\uXXXX}} sequences can only be used within
> string literals (as in C) or anywhere in a JEXL script (as in Java). I tried
> creating a JEXL string literal that used \u0027 instead of a single quote as
> its delimiter, but it didn't work, so I suspect this is just for string
> literals.
> For reference, the escape sequences are documented under "String literals" in
> syntax.xml like this:
> {quote}<p>The escape character is <code>\</code> (backslash); it only escapes
> the string delimiter</p>
> {quote}
> By the way, the second clause is not strictly true, since (experimentally)
> the escape character can also be escaped (this might be JEXL-98). This might
> be obvious enough that it doesn't need to be documented, though.
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