[basex-talk] Regular Expression 'P{Ll}' raises error [FORX0004] Regular expression: 'Lexical error at line 1, column 3. Encountered: "L" (76), after : "{"'.

Hi,

I find that a regualr expression below

let $regex := 'P{Ll}'

let $input := .//subsection[matches(@title,$regex)]

causes the error [FORX0004] Regular expression: 'Lexical error at line 1, column 3. Encountered: "L" (76), after : "{"'.

I use P{Ll} in xslt/xpath in saxon without issue and I'm running basex with saxon so I assume this is something basex is parsing out as an error condition

I looked in the xquery spec for the error and found which seems to be something else An error is raised [err:FORX0004http://www.w3.org/TR/xpath-functions-30/#ERRFORX0004] if the value of $replacement contains a "$" character that is not immediately followed by a digit 0-9 and not immediately preceded by a "".

Let me know your thoughts Regards