3 %.*s matches null string many times
5 $a = "ABC123" ; $a =~ /(?=a)*/'
7 Strange *+?{} on zero-length expression
11 Character class syntax [. .] is reserved for future extensions
12 Character class syntax [= =] is reserved for future extensions
16 use warning 'unsafe' ;
22 (?=a)* matches null string many times at - line 4.
25 use warning 'unsafe' ;
31 Strange *+?{} on zero-length expression at - line 4.
34 use warning 'unsafe' ;
44 Character class syntax [: :] belongs inside character classes at - line 4.
45 Character class syntax [. .] belongs inside character classes at - line 5.
46 Character class syntax [. .] is reserved for future extensions at - line 5.
47 Character class syntax [= =] belongs inside character classes at - line 6.
48 Character class syntax [= =] is reserved for future extensions at - line 6.