how I use special character \N{name} in regular expression

Example:

#!/usr//bin/perl -wl
use strict;
use charnames ':full';

my $string = "foo \N{COPYRIGHT SIGN} bar";

print "matched" if $string =~ /\N{COPYRIGHT SIGN}/;
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The list of names can be found in the file .../unicore/NamesList.txt that comes with Perl.