[pcre-dev] [Bug 2503] New: Documentation references a (?J) n…

https://bugs.exim.org/show_bug.cgi?id=2503

            Bug ID: 2503
           Summary: Documentation references a (?J) not explained anywhere
           Product: PCRE
           Version: N/A
          Hardware: All
                OS: All
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Documentation
          Assignee: ph10@???
          Reporter: php4fan@???
                CC: pcre-dev@???

https://www.pcre.org/current/doc/html/pcre2pattern.html

Where it says:

"""
The duplicate name constraint can be disabled by setting the PCRE2_DUPNAMES
option at compile time, OR BY THE USE OF (?J) within the pattern
"""
(emphasys added)

So I searched for any occurrence of "?J" and it doesn't appear anywhere else.

It's not clear by that sentence alone how "(?J) within the pattern" is supposed
to be used. Not only there is no explanation but it doesn't appear in any of
the examples.

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