-------Type------------
ref (?-xism:a) (regex) is 'Regexp': true
ref (?-xism:a) (string) is '': true
ref (?-xism:a) (string) is not 'Regexp': true
-------Equality--------
comparing literals: qr{a} eq '(?-xism:a)': true
comparing variables: regex eq (?-xism:a) (string): true