http://www.perlmonks.org?node_id=998822


in reply to Re^5: Internal representation of qr// compiled regular expressions
in thread Internal representation of qr// compiled regular expressions

And what is: '(?^u:' ?

When inspecting (using the EPIC/Eclipse Perl debugger) the internal composition of a compiled regex (for example:

my $var = qr/abc/;

then $var shows as:

 '(?^u:abc)'

What is '(?^u:' ?