regcomp.c AOK

Quantifier unexpected on zero-length expression [S_study_chunk]

(?p{}) is deprecated - use (??{}) [S_reg]

$a =~ /(?p{'x'})/ ;

Useless (%s%c) - %suse /%c modifier [S_reg]

Useless (%sc) - %suse /gc modifier [S_reg]

Strange *+?{} on zero-length expression [S_study_chunk]

/(?=a)?/

%.*s matches null string many times [S_regpiece]

$a = "ABC123" ; $a =~ /(?=a)*/'

/%.127s/: Unrecognized escape \\%c passed through [S_regatom]

$x = '\m' ; /$x/

POSIX syntax [%c %c] belongs inside character classes [S_checkposixcc]

Character class [:%.*s:] unknown [S_regpposixcc]

Character class syntax [%c %c] belongs inside character classes [S_checkposixcc]

/%.127s/: false [] range \"%*.*s\" in regexp [S_regclass]

/%.127s/: false [] range \"%*.*s\" in regexp [S_regclassutf8]

/%.127s/: Unrecognized escape \\%c in character class passed through" [S_regclass]

/%.127s/: Unrecognized escape \\%c in character class passed through" [S_regclassutf8]

False [] range \"%*.*s\" [S_regclass]

__END__

# regcomp.c [S_regpiece]

use warnings 'regexp' ;

my $a = "ABC123" ;

$a =~ /(?=a)*/ ;

no warnings 'regexp' ;

$a =~ /(?=a)*/ ;

EXPECT

(?=a)* matches null string many times in regex; marked by <-- HERE in m/(?=a)* <-- HERE / at - line 4.

########

# regcomp.c [S_regatom]

$x = '\m' ;

use warnings 'regexp' ;

$a =~ /a$x/ ;

no warnings 'regexp' ;

$a =~ /a$x/ ;

EXPECT

Unrecognized escape \m passed through in regex; marked by <-- HERE in m/a\m <-- HERE / at - line 4.

########

# regcomp.c [S_regpposixcc S_checkposixcc]

#

use warnings 'regexp' ;

$_ = "" ;

/[:alpha:]/;

/[:zog:]/;

no warnings 'regexp' ;

/[:alpha:]/;

/[:zog:]/;

EXPECT

POSIX syntax [: :] belongs inside character classes in regex; marked by <-- HERE in m/[:alpha:] <-- HERE / at - line 5.

POSIX syntax [: :] belongs inside character classes in regex; marked by <-- HERE in m/[:zog:] <-- HERE / at - line 6.

########

# regcomp.c [S_checkposixcc]

#

use warnings 'regexp' ;

$_ = "" ;

/[.zog.]/;

no warnings 'regexp' ;

/[.zog.]/;

EXPECT

POSIX syntax [. .] belongs inside character classes in regex; marked by <-- HERE in m/[.zog.] <-- HERE / at - line 5.

POSIX syntax [. .] is reserved for future extensions in regex; marked by <-- HERE in m/[.zog.] <-- HERE / at - line 5.

########

# regcomp.c [S_regclass]

$_ = "";

use warnings 'regexp' ;

/[a-b]/;

/[a-\d]/;

/[\d-b]/;

/[\s-\d]/;

/[\d-\s]/;

/[a-[:digit:]]/;

/[[:digit:]-b]/;

/[[:alpha:]-[:digit:]]/;

/[[:digit:]-[:alpha:]]/;

no warnings 'regexp' ;

/[a-b]/;

/[a-\d]/;

/[\d-b]/;

/[\s-\d]/;

/[\d-\s]/;

/[a-[:digit:]]/;

/[[:digit:]-b]/;

/[[:alpha:]-[:digit:]]/;

/[[:digit:]-[:alpha:]]/;

EXPECT

False [] range "a-\d" in regex; marked by <-- HERE in m/[a-\d <-- HERE ]/ at - line 5.

False [] range "\d-" in regex; marked by <-- HERE in m/[\d- <-- HERE b]/ at - line 6.

False [] range "\s-" in regex; marked by <-- HERE in m/[\s- <-- HERE \d]/ at - line 7.

False [] range "\d-" in regex; marked by <-- HERE in m/[\d- <-- HERE \s]/ at - line 8.

False [] range "a-[:digit:]" in regex; marked by <-- HERE in m/[a-[:digit:] <-- HERE ]/ at - line 9.

False [] range "[:digit:]-" in regex; marked by <-- HERE in m/[[:digit:]- <-- HERE b]/ at - line 10.

False [] range "[:alpha:]-" in regex; marked by <-- HERE in m/[[:alpha:]- <-- HERE [:digit:]]/ at - line 11.

False [] range "[:digit:]-" in regex; marked by <-- HERE in m/[[:digit:]- <-- HERE [:alpha:]]/ at - line 12.

########

# regcomp.c [S_regclassutf8]

BEGIN {

if (ord("\t") == 5) {

print "SKIPPED\n# ebcdic regular expression ranges differ.";

exit 0;

}

}

use utf8;

$_ = "";

use warnings 'regexp' ;

/[a-b]/;

/[a-\d]/;

/[\d-b]/;

/[\s-\d]/;

/[\d-\s]/;

/[a-[:digit:]]/;

/[[:digit:]-b]/;

/[[:alpha:]-[:digit:]]/;

/[[:digit:]-[:alpha:]]/;

no warnings 'regexp' ;

/[a-b]/;

/[a-\d]/;

/[\d-b]/;

/[\s-\d]/;

/[\d-\s]/;

/[a-[:digit:]]/;

/[[:digit:]-b]/;

/[[:alpha:]-[:digit:]]/;

/[[:digit:]-[:alpha:]]/;

EXPECT

False [] range "a-\d" in regex; marked by <-- HERE in m/[a-\d <-- HERE ]/ at - line 12.

False [] range "\d-" in regex; marked by <-- HERE in m/[\d- <-- HERE b]/ at - line 13.

False [] range "\s-" in regex; marked by <-- HERE in m/[\s- <-- HERE \d]/ at - line 14.

False [] range "\d-" in regex; marked by <-- HERE in m/[\d- <-- HERE \s]/ at - line 15.

False [] range "a-[:digit:]" in regex; marked by <-- HERE in m/[a-[:digit:] <-- HERE ]/ at - line 16.

False [] range "[:digit:]-" in regex; marked by <-- HERE in m/[[:digit:]- <-- HERE b]/ at - line 17.

False [] range "[:alpha:]-" in regex; marked by <-- HERE in m/[[:alpha:]- <-- HERE [:digit:]]/ at - line 18.

False [] range "[:digit:]-" in regex; marked by <-- HERE in m/[[:digit:]- <-- HERE [:alpha:]]/ at - line 19.

########

# regcomp.c [S_regclass S_regclassutf8]

use warnings 'regexp' ;

$a =~ /[a\zb]/ ;

no warnings 'regexp' ;

$a =~ /[a\zb]/ ;

EXPECT

Unrecognized escape \z in character class passed through in regex; marked by <-- HERE in m/[a\z <-- HERE b]/ at - line 3.

########

# regcomp.c [S_study_chunk]

use warnings 'deprecated' ;

$a = "xx" ;

$a =~ /(?p{'x'})/ ;

no warnings ;

use warnings 'regexp' ;

$a =~ /(?p{'x'})/ ;

use warnings;

no warnings 'deprecated' ;

no warnings 'regexp' ;

no warnings 'syntax' ;

$a =~ /(?p{'x'})/ ;

EXPECT

(?p{}) is deprecated - use (??{}) in regex; marked by <-- HERE in m/(?p <-- HERE {'x'})/ at - line 4.

(?p{}) is deprecated - use (??{}) in regex; marked by <-- HERE in m/(?p <-- HERE {'x'})/ at - line 7.

########

# regcomp.c [S_reg]

use warnings 'regexp' ;

$a = qr/(?c)/;

$a = qr/(?-c)/;

$a = qr/(?g)/;

$a = qr/(?-g)/;

$a = qr/(?o)/;

$a = qr/(?-o)/;

$a = qr/(?g-o)/;

$a = qr/(?g-c)/;

$a = qr/(?o-cg)/; # (?c) means (?g) error won't be thrown

$a = qr/(?ogc)/;

no warnings 'regexp' ;

$a = qr/(?c)/;

$a = qr/(?-c)/;

$a = qr/(?g)/;

$a = qr/(?-g)/;

$a = qr/(?o)/;

$a = qr/(?-o)/;

$a = qr/(?g-o)/;

$a = qr/(?g-c)/;

$a = qr/(?o-cg)/; # (?c) means (?g) error won't be thrown

$a = qr/(?ogc)/;

#EXPECT

EXPECT

Useless (?c) - use /gc modifier in regex; marked by <-- HERE in m/(?c <-- HERE )/ at - line 3.

Useless (?-c) - don't use /gc modifier in regex; marked by <-- HERE in m/(?-c <-- HERE )/ at - line 4.

Useless (?g) - use /g modifier in regex; marked by <-- HERE in m/(?g <-- HERE )/ at - line 5.

Useless (?-g) - don't use /g modifier in regex; marked by <-- HERE in m/(?-g <-- HERE )/ at - line 6.

Useless (?o) - use /o modifier in regex; marked by <-- HERE in m/(?o <-- HERE )/ at - line 7.

Useless (?-o) - don't use /o modifier in regex; marked by <-- HERE in m/(?-o <-- HERE )/ at - line 8.

Useless (?g) - use /g modifier in regex; marked by <-- HERE in m/(?g <-- HERE -o)/ at - line 9.

Useless (?-o) - don't use /o modifier in regex; marked by <-- HERE in m/(?g-o <-- HERE )/ at - line 9.

Useless (?g) - use /g modifier in regex; marked by <-- HERE in m/(?g <-- HERE -c)/ at - line 10.

Useless (?-c) - don't use /gc modifier in regex; marked by <-- HERE in m/(?g-c <-- HERE )/ at - line 10.

Useless (?o) - use /o modifier in regex; marked by <-- HERE in m/(?o <-- HERE -cg)/ at - line 11.

Useless (?-c) - don't use /gc modifier in regex; marked by <-- HERE in m/(?o-c <-- HERE g)/ at - line 11.

Useless (?o) - use /o modifier in regex; marked by <-- HERE in m/(?o <-- HERE gc)/ at - line 12.

Useless (?g) - use /g modifier in regex; marked by <-- HERE in m/(?og <-- HERE c)/ at - line 12.

Useless (?c) - use /gc modifier in regex; marked by <-- HERE in m/(?ogc <-- HERE )/ at - line 12.