See Tie::Hash::NamedCapture, http://perl5.git.perl.org/perl.git/blob/HEAD:/ext/Tie-Hash-NamedCapture/NamedCapture.xs, perlreapi, something about named_buff, http://perl5.git.perl.org/perl.git/blob?f=regcomp.c#l6468

It is possible, but not exactly easy

In reply to Re: offset of named capture buffer by Anonymous Monk
in thread offset of named capture buffer by mhgoeschl

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