t/op/ref.t See if refs and objects work
t/op/regexp_noamp.t See if regular expressions work with optimizations
t/op/regexp_qr.t See if regular expressions work as qr//
+t/op/regexp_trielist.t See if regular expressions work with trie optimisation
+t/op/regexp_notrie.t See if regular expressions work without trie optimisation
t/op/regexp.t See if regular expressions work
t/op/regmesg.t See if one can get regular expression errors
t/op/repeat.t See if x operator works