/a[[:punct:]b]/BZ
+/L(?#(|++<!(2)?/BZ
+
+/L(?#(|++<!(2)?/BOZ
+
+/L(?#(|++<!(2)?/BCZ
+
+/L(?#(|++<!(2)?/BCOZ
+
+/(A*)\E+/CBZ
+
+/()\Q\E*]/BCZ
+
+/(?<A>)(?J:(?<B>)(?<B>))(?<C>)/
+ \O\CC
+
+/(?=a\K)/
+ ring bpattingbobnd $ 1,oern cou \rb\L
+
+/(?<=((?C)0))/
+ 9010
+ abcd
+
+/((?J)(?'R'(?'R'(?'R'(?'R'(?'R'(?|(\k'R'))))))))/
+
+/\N(?(?C)0?!.)*/
+
/-- End of testinput2 --/