How to escape regular expression special characters in CoreNLP TokenRegex pattern?

Question

How to escape special characters (eg $ or ? ) in CoreNLP TokenRegex pattern (eg /$[0-9,]+/ where $ refer to the currency symbol). For example, in java the pattern would be \\\\$[0-9,]+ .

Is there a fuction similar to Pattern.quote() in CoreNLP TokenRegex?

Answer 1

For special characters inside of regular expressions -- as in your example of /$[0-9,]+/ -- this is the same escape character as Javan's Pattern. That is, '\\'. So in your case, /\\$[0-9,]+/ .

For TokensRegex special characters, you can always quote them. For example: foo "[" citation needed "]" .