David Costanzo created JEXL-331:
-----------------------------------
Summary: 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
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)
