perl -MO=Deparse,-p,-x9 -e "if ($/) {print 1} else {print 2}"

($/ ? do { print(1) } : do { print(2) });
-e syntax OK

perl -MO=Deparse,-p,-x9 -e "$/?print 1:print 2"
($/ ? print(1) : print(2));
-e syntax OK