$ perl -MO=Deparse -e " s\\\g " s///g; -e syntax OK $ perl -MO=Deparse -e " s«««g " s///g; -e syntax OK #### perl -MO=Deparse -e " s {}//g " perl -MO=Deparse -e " s {}\\g " perl -MO=Deparse -e " s {}vvg " perl -MO=Deparse -e " s {}()g " perl -MO=Deparse -e " s {}[]g " perl -MO=Deparse -e " s {}<>g " perl -MO=Deparse -e " s<><>g "