Hi,

In message "Re: $& write-protected?"
    on 03/11/19, Simon Strandgaard <qj5nd7l02 / sneakemail.com> writes:

|[RCR] remove write-protection of $&, $1-$9, $', $`, $+
|or perhaps let them stay write-protected, but let assignment via const_set
|become possible?

If you update $~ (the match result), $&, $1, etc. would follow
accordingly.  So that the better RCR should be to create MatchData
without built-in regular expression match, I think.

							matz.