ICU doesn't consider these characters as punctuation (punct): $+<=>^`|~
Description
The java.util.regex.Pattern documentation claims that the POSIX character class "Punct"
contains the characters:
Empirically, the following characters are not considered in Punct on ICU.
Grep seems to treat them as part of unct:. So perhaps this is a bug in ICU? We need to figure out whether that is the case and how to fix it.
GoogleIssue: 111497078
Activity
Looks good, thanks. When you said "docs" I had assumed you meant an API Docs change, so I was worried that I couldn't find the commit for that. Thanks for changing the ticket type to "User Guide".
The Userguide change is to the section https://sites.google.com/site/icuprojectuserguide/strings/regexp#TOC-Differences-with-Java-Regular-Expressions, the addition of the last item in the list of differences with Java Regular Expressions.
The property expression \p{punct} differs in what it matches. Java matches matches any of !"#$%&'()*+,-./:;<=>?@[]^_`{|}~. From that list, ICU omits $+<=>^`|~
ICU follows the recommendations from Unicode UTS-18, http://unicode.org/reports/tr18/#Compatibility_Properties. See also https://unicode-org.atlassian.net/browse/ICU-20095
There are no commits on this ticket. Where is the docs update?
Where is the docs update? It do not see it on this issue.
Closed with a combination of fixed, for the docs update, and working as designed, for the behavior.
