[jira] [Closed] (JEXL-331) Please document \uXXXX escape sequence

["Henri Biestro (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JEXL-331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Henri Biestro closed JEXL-331.
------------------------------

> 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.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)