PCRE version 3.9 02-Jan-2002
/(a)b|/
Capturing subpattern count = 1
No options
No first char
No need char
/abc/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
abc
0: abc
defabc
0: abc
\Aabc
0: abc
*** Failers
No match
\Adefabc
No match
ABC
No match
/^abc/
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'c'
abc
0: abc
\Aabc
0: abc
*** Failers
No match
defabc
No match
\Adefabc
No match
/a+bc/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/a*bc/
Capturing subpattern count = 0
No options
No first char
Need char = 'c'
/a{3}bc/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/(abc|a+z)/
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/^abc$/
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'c'
abc
0: abc
*** Failers
No match
def\nabc
No match
/ab\gdef/X
Failed: unrecognized character follows \ at offset 3
/(?X)ab\gdef/X
Failed: unrecognized character follows \ at offset 7
/x{5,4}/
Failed: numbers out of order in {} quantifier at offset 5
/z{65536}/
Failed: number too big in {} quantifier at offset 7
/[abcd/
Failed: missing terminating ] for character class at offset 5
/[\B]/
Failed: invalid escape sequence in character class at offset 2
/[z-a]/
Failed: range out of order in character class at offset 3
/^*/
Failed: nothing to repeat at offset 1
/(abc/
Failed: missing ) at offset 4
/(?# abc/
Failed: missing ) after comment at offset 7
/(?z)abc/
Failed: unrecognized character after (? at offset 2
/.*b/
Capturing subpattern count = 0
No options
First char at start or follows \n
Need char = 'b'
/.*?b/
Capturing subpattern count = 0
No options
First char at start or follows \n
Need char = 'b'
/cat|dog|elephant/
Capturing subpattern count = 0
No options
No first char
No need char
this sentence eventually mentions a cat
0: cat
this sentences rambles on and on for a while and then reaches elephant
0: elephant
/cat|dog|elephant/S
Capturing subpattern count = 0
No options
No first char
No need char
Starting character set: c d e
this sentence eventually mentions a cat
0: cat
this sentences rambles on and on for a while and then reaches elephant
0: elephant
/cat|dog|elephant/iS
Capturing subpattern count = 0
Options: caseless
No first char
No need char
Starting character set: C D E c d e
this sentence eventually mentions a CAT cat
0: CAT
this sentences rambles on and on for a while to elephant ElePhant
0: elephant
/a|[bcd]/S
Capturing subpattern count = 0
No options
No first char
No need char
Starting character set: a b c d
/(a|[^\dZ])/S
Capturing subpattern count = 1
No options
No first char
No need char
Starting character set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
\x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
\x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d
e f g h i j k l m n o p q r s t u v w x y z { | } ~ \x7f \x80 \x81 \x82 \x83
\x84 \x85 \x86 \x87 \x88 \x89 \x8a \x8b \x8c \x8d \x8e \x8f \x90 \x91 \x92
\x93 \x94 \x95 \x96 \x97 \x98 \x99 \x9a \x9b \x9c \x9d \x9e \x9f \xa0 \xa1
\xa2 \xa3 \xa4 \xa5 \xa6 \xa7 \xa8 \xa9 \xaa \xab \xac \xad \xae \xaf \xb0
\xb1 \xb2 \xb3 \xb4 \xb5 \xb6 \xb7 \xb8 \xb9 \xba \xbb \xbc \xbd \xbe \xbf
\xc0 \xc1 \xc2 \xc3 \xc4 \xc5 \xc6 \xc7 \xc8 \xc9 \xca \xcb \xcc \xcd \xce
\xcf \xd0 \xd1 \xd2 \xd3 \xd4 \xd5 \xd6 \xd7 \xd8 \xd9 \xda \xdb \xdc \xdd
\xde \xdf \xe0 \xe1 \xe2 \xe3 \xe4 \xe5 \xe6 \xe7 \xe8 \xe9 \xea \xeb \xec
\xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb
\xfc \xfd \xfe \xff
/(a|b)*[\s]/S
Capturing subpattern count = 1
No options
No first char
No need char
Starting character set: \x09 \x0a \x0b \x0c \x0d \x20 a b
/(ab\2)/
Failed: back reference to non-existent subpattern at offset 6
/{4,5}abc/
Failed: nothing to repeat at offset 4
/(a)(b)(c)\2/
Capturing subpattern count = 3
Max back reference = 2
No options
First char = 'a'
Need char = 'c'
abcb
0: abcb
1: a
2: b
3: c
\O0abcb
Matched, but too many substrings
\O3abcb
Matched, but too many substrings
0: abcb
\O6abcb
Matched, but too many substrings
0: abcb
1: a
\O9abcb
Matched, but too many substrings
0: abcb
1: a
2: b
\O12abcb
0: abcb
1: a
2: b
3: c
/(a)bc|(a)(b)\2/
Capturing subpattern count = 3
Max back reference = 2
No options
First char = 'a'
No need char
abc
0: abc
1: a
\O0abc
Matched, but too many substrings
\O3abc
Matched, but too many substrings
0: abc
\O6abc
0: abc
1: a
aba
0: aba
1: <unset>
2: a
3: b
\O0aba
Matched, but too many substrings
\O3aba
Matched, but too many substrings
0: aba
\O6aba
Matched, but too many substrings
0: aba
1: <unset>
\O9aba
Matched, but too many substrings
0: aba
1: <unset>
2: a
\O12aba
0: aba
1: <unset>
2: a
3: b
/abc$/E
Capturing subpattern count = 0
Options: dollar_endonly
First char = 'a'
Need char = 'c'
abc
0: abc
*** Failers
No match
abc\n
No match
abc\ndef
No match
/(a)(b)(c)(d)(e)\6/
Failed: back reference to non-existent subpattern at offset 17
/the quick brown fox/
Capturing subpattern count = 0
No options
First char = 't'
Need char = 'x'
the quick brown fox
0: the quick brown fox
this is a line with the quick brown fox
0: the quick brown fox
/the quick brown fox/A
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'x'
the quick brown fox
0: the quick brown fox
*** Failers
No match
this is a line with the quick brown fox
No match
/ab(?z)cd/
Failed: unrecognized character after (? at offset 4
/^abc|def/
Capturing subpattern count = 0
No options
No first char
No need char
abcdef
0: abc
abcdef\B
0: def
/.*((abc)$|(def))/
Capturing subpattern count = 3
No options
First char at start or follows \n
No need char
defabc
0: defabc
1: abc
2: abc
\Zdefabc
0: def
1: def
2: <unset>
3: def
/abc/P
abc
0: abc
*** Failers
No match: POSIX code 17: match failed
/^abc|def/P
abcdef
0: abc
abcdef\B
0: def
/.*((abc)$|(def))/P
defabc
0: defabc
1: abc
2: abc
\Zdefabc
0: def
1: def
3: def
/the quick brown fox/P
the quick brown fox
0: the quick brown fox
*** Failers
No match: POSIX code 17: match failed
The Quick Brown Fox
No match: POSIX code 17: match failed
/the quick brown fox/Pi
the quick brown fox
0: the quick brown fox
The Quick Brown Fox
0: The Quick Brown Fox
/abc.def/P
*** Failers
No match: POSIX code 17: match failed
abc\ndef
No match: POSIX code 17: match failed
/abc$/P
abc
0: abc
abc\n
0: abc
/(abc)\2/P
Failed: POSIX code 15: bad back reference at offset 7
/(abc\1)/P
abc
No match: POSIX code 17: match failed
/)/
Failed: unmatched parentheses at offset 0
/a[]b/
Failed: missing terminating ] for character class at offset 4
/[^aeiou ]{3,}/
Capturing subpattern count = 0
No options
No first char
No need char
co-processors, and for
0: -pr
/<.*>/
Capturing subpattern count = 0
No options
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/<.*?>/
Capturing subpattern count = 0
No options
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/<.*>/U
Capturing subpattern count = 0
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/<.*>(?U)/
Capturing subpattern count = 0
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>
/<.*?>/U
Capturing subpattern count = 0
Options: ungreedy
First char = '<'
Need char = '>'
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/={3,}/U
Capturing subpattern count = 0
Options: ungreedy
First char = '='
Need char = '='
abc========def
0: ===
/(?U)={3,}?/
Capturing subpattern count = 0
Options: ungreedy
First char = '='
Need char = '='
abc========def
0: ========
/(?<!bar|cattle)foo/
Capturing subpattern count = 0
No options
First char = 'f'
Need char = 'o'
foo
0: foo
catfoo
0: foo
*** Failers
No match
the barfoo
No match
and cattlefoo
No match
/(?<=a+)b/
Failed: lookbehind assertion is not fixed length at offset 6
/(?<=aaa|b{0,3})b/
Failed: lookbehind assertion is not fixed length at offset 14
/(?<!(foo)a\1)bar/
Failed: lookbehind assertion is not fixed length at offset 12
/(?i)abc/
Capturing subpattern count = 0
Options: caseless
First char = 'a'
Need char = 'c'
/(a|(?m)a)/
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/(?i)^1234/
Capturing subpattern count = 0
Options: anchored caseless
No first char
Need char = '4'
/(^b|(?i)^d)/
Capturing subpattern count = 1
Options: anchored
Case state changes
No first char
No need char
/(?s).*/
Capturing subpattern count = 0
Options: anchored dotall
No first char
No need char
/[abcd]/S
Capturing subpattern count = 0
No options
No first char
No need char
Starting character set: a b c d
/(?i)[abcd]/S
Capturing subpattern count = 0
Options: caseless
No first char
No need char
Starting character set: A B C D a b c d
/(?m)[xy]|(b|c)/S
Capturing subpattern count = 1
Options: multiline
No first char
No need char
Starting character set: b c x y
/(^a|^b)/m
Capturing subpattern count = 1
Options: multiline
First char at start or follows \n
No need char
/(?i)(^a|^b)/m
Capturing subpattern count = 1
Options: caseless multiline
First char at start or follows \n
No need char
/(a)(?(1)a|b|c)/
Failed: conditional group contains more than two branches at offset 13
/(?(?=a)a|b|c)/
Failed: conditional group contains more than two branches at offset 12
/(?(1a)/
Failed: malformed number after (?( at offset 4
/(?(?i))/
Failed: assertion expected after (?( at offset 3
/(?(abc))/
Failed: assertion expected after (?( at offset 3
/(?(?<ab))/
Failed: unrecognized character after (?< at offset 2
/((?s)blah)\s+\1/
Capturing subpattern count = 1
Max back reference = 1
No options
First char = 'b'
Need char = 'h'
/((?i)blah)\s+\1/
Capturing subpattern count = 1
Max back reference = 1
No options
Case state changes
No first char
Need char = 'h'
/((?i)b)/DS
------------------------------------------------------------------
0 16 Bra 0
3 8 Bra 1
6 01 Opt
8 1 b
11 8 Ket
14 00 Opt
16 16 Ket
19 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
Case state changes
No first char
Need char = 'b'
Starting character set: B b
/(a*b|(?i:c*(?-i)d))/S
Capturing subpattern count = 1
No options
Case state changes
No first char
No need char
Starting character set: C a b c d
/a$/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
a
0: a
a\n
0: a
*** Failers
No match
\Za
No match
\Za\n
No match
/a$/m
Capturing subpattern count = 0
Options: multiline
First char = 'a'
No need char
a
0: a
a\n
0: a
\Za\n
0: a
*** Failers
No match
\Za
No match
/\Aabc/m
Capturing subpattern count = 0
Options: anchored multiline
No first char
Need char = 'c'
/^abc/m
Capturing subpattern count = 0
Options: multiline
First char at start or follows \n
Need char = 'c'
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/
Capturing subpattern count = 5
Options: anchored
No first char
Need char = 'a'
aaaaabbbbbcccccdef
0: aaaaabbbbbcccccdef
1: aaaaabbbbbcccccdef
2: aaaaa
3: b
4: bbbbccccc
5: def
/(?<=foo)[ab]/S
Capturing subpattern count = 0
No options
No first char
No need char
Starting character set: a b
/(?<!foo)(alpha|omega)/S
Capturing subpattern count = 1
No options
No first char
Need char = 'a'
Starting character set: a o
/(?!alphabet)[ab]/S
Capturing subpattern count = 0
No options
No first char
No need char
Starting character set: a b
/(?<=foo\n)^bar/m
Capturing subpattern count = 0
Options: multiline
First char at start or follows \n
Need char = 'r'
/(?>^abc)/m
Capturing subpattern count = 0
Options: multiline
First char at start or follows \n
Need char = 'c'
abc
0: abc
def\nabc
0: abc
*** Failers
No match
defabc
No match
/(?<=ab(c+)d)ef/
Failed: lookbehind assertion is not fixed length at offset 11
/(?<=ab(?<=c+)d)ef/
Failed: lookbehind assertion is not fixed length at offset 12
/(?<=ab(c|de)f)g/
Failed: lookbehind assertion is not fixed length at offset 13
/The next three are in testinput2 because they have variable length branches/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 's'
/(?<=bullock|donkey)-cart/
Capturing subpattern count = 0
No options
First char = '-'
Need char = 't'
the bullock-cart
0: -cart
a donkey-cart race
0: -cart
*** Failers
No match
cart
No match
horse-and-cart
No match
/(?<=ab(?i)x|y|z)/
Capturing subpattern count = 0
No options
Case state changes
No first char
No need char
/(?>.*)(?<=(abcd)|(xyz))/
Capturing subpattern count = 2
No options
First char at start or follows \n
No need char
alphabetabcd
0: alphabetabcd
1: abcd
endingxyz
0: endingxyz
1: <unset>
2: xyz
/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/
Capturing subpattern count = 0
No options
Case state changes
First char = 'Z'
Need char = 'Z'
abxyZZ
0: ZZ
abXyZZ
0: ZZ
ZZZ
0: ZZ
zZZ
0: ZZ
bZZ
0: ZZ
BZZ
0: ZZ
*** Failers
No match
ZZ
No match
abXYZZ
No match
zzz
No match
bzz
No match
/(?<!(foo)a)bar/
Capturing subpattern count = 1
No options
First char = 'b'
Need char = 'r'
bar
0: bar
foobbar
0: bar
*** Failers
No match
fooabar
No match
/This one is here because Perl 5.005_02 doesn't fail it/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 't'
/^(a)?(?(1)a|b)+$/
Capturing subpattern count = 1
Options: anchored
No first char
No need char
*** Failers
No match
a
No match
/This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 'g'
/^(a\1?){4}$/
Capturing subpattern count = 1
Max back reference = 1
Options: anchored
No first char
Need char = 'a'
aaaaaa
0: aaaaaa
1: aa
/These are syntax tests from Perl 5.005/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = '5'
/a[b-a]/
Failed: range out of order in character class at offset 4
/a[]b/
Failed: missing terminating ] for character class at offset 4
/a[/
Failed: missing terminating ] for character class at offset 2
/*a/
Failed: nothing to repeat at offset 0
/(*)b/
Failed: nothing to repeat at offset 1
/abc)/
Failed: unmatched parentheses at offset 3
/(abc/
Failed: missing ) at offset 4
/a**/
Failed: nothing to repeat at offset 2
/)(/
Failed: unmatched parentheses at offset 0
/\1/
Failed: back reference to non-existent subpattern at offset 2
/\2/
Failed: back reference to non-existent subpattern at offset 2
/(a)|\2/
Failed: back reference to non-existent subpattern at offset 6
/a[b-a]/i
Failed: range out of order in character class at offset 4
/a[]b/i
Failed: missing terminating ] for character class at offset 4
/a[/i
Failed: missing terminating ] for character class at offset 2
/*a/i
Failed: nothing to repeat at offset 0
/(*)b/i
Failed: nothing to repeat at offset 1
/abc)/i
Failed: unmatched parentheses at offset 3
/(abc/i
Failed: missing ) at offset 4
/a**/i
Failed: nothing to repeat at offset 2
/)(/i
Failed: unmatched parentheses at offset 0
/:(?:/
Failed: missing ) at offset 4
/(?<%)b/
Failed: unrecognized character after (?< at offset 0
/a(?{)b/
Failed: unrecognized character after (? at offset 3
/a(?{{})b/
Failed: unrecognized character after (? at offset 3
/a(?{}})b/
Failed: unrecognized character after (? at offset 3
/a(?{"{"})b/
Failed: unrecognized character after (? at offset 3
/a(?{"{"}})b/
Failed: unrecognized character after (? at offset 3
/(?(1?)a|b)/
Failed: malformed number after (?( at offset 4
/(?(1)a|b|c)/
Failed: conditional group contains more than two branches at offset 10
/[a[:xyz:/
Failed: missing terminating ] for character class at offset 8
/(?<=x+)y/
Failed: lookbehind assertion is not fixed length at offset 6
/a{37,17}/
Failed: numbers out of order in {} quantifier at offset 7
/abc/\
Failed: \ at end of pattern at offset 4
/abc/\P
Failed: POSIX code 9: bad escape sequence at offset 4
/abc/\i
Failed: \ at end of pattern at offset 4
/(a)bc(d)/
Capturing subpattern count = 2
No options
First char = 'a'
Need char = 'd'
abcd
0: abcd
1: a
2: d
abcd\C2
0: abcd
1: a
2: d
2C d (1)
abcd\C5
0: abcd
1: a
2: d
copy substring 5 failed -7
/(.{20})/
Capturing subpattern count = 1
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
abcdefghijklmnopqrstuvwxyz\C1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
copy substring 1 failed -6
abcdefghijklmnopqrstuvwxyz\G1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
1G abcdefghijklmnopqrst (20)
/(.{15})/
Capturing subpattern count = 1
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmno
1: abcdefghijklmno
abcdefghijklmnopqrstuvwxyz\C1\G1
0: abcdefghijklmno
1: abcdefghijklmno
1C abcdefghijklmno (15)
1G abcdefghijklmno (15)
/(.{16})/
Capturing subpattern count = 1
No options
No first char
No need char
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnop
1: abcdefghijklmnop
abcdefghijklmnopqrstuvwxyz\C1\G1\L
0: abcdefghijklmnop
1: abcdefghijklmnop
copy substring 1 failed -6
1G abcdefghijklmnop (16)
0L abcdefghijklmnop
1L abcdefghijklmnop
/^(a|(bc))de(f)/
Capturing subpattern count = 3
Options: anchored
No first char
Need char = 'f'
adef\G1\G2\G3\G4\L
0: adef
1: a
2: <unset>
3: f
1G a (1)
2G (0)
3G f (1)
get substring 4 failed -7
0L adef
1L a
2L
3L f
bcdef\G1\G2\G3\G4\L
0: bcdef
1: bc
2: bc
3: f
1G bc (2)
2G bc (2)
3G f (1)
get substring 4 failed -7
0L bcdef
1L bc
2L bc
3L f
adefghijk\C0
0: adef
1: a
2: <unset>
3: f
0C adef (4)
/^abc\00def/
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'f'
abc\00def\L\C0
0: abc\x00def
0C abc (7)
0L abc
/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
)?)?)?)?)?)?)?)?)?otherword/M
Memory allocation (code space): 428
Capturing subpattern count = 8
No options
First char = 'w'
Need char = 'd'
/.*X/D
------------------------------------------------------------------
0 8 Bra 0
3 Any*
5 1 X
8 8 Ket
11 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char at start or follows \n
Need char = 'X'
/.*X/Ds
------------------------------------------------------------------
0 8 Bra 0
3 Any*
5 1 X
8 8 Ket
11 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored dotall
No first char
Need char = 'X'
/(.*X|^B)/D
------------------------------------------------------------------
0 21 Bra 0
3 8 Bra 1
6 Any*
8 1 X
11 7 Alt
14 ^
15 1 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
No options
First char at start or follows \n
No need char
/(.*X|^B)/Ds
------------------------------------------------------------------
0 21 Bra 0
3 8 Bra 1
6 Any*
8 1 X
11 7 Alt
14 ^
15 1 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: anchored dotall
No first char
No need char
/(?s)(.*X|^B)/D
------------------------------------------------------------------
0 21 Bra 0
3 8 Bra 1
6 Any*
8 1 X
11 7 Alt
14 ^
15 1 B
18 15 Ket
21 21 Ket
24 End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: anchored dotall
No first char
No need char
/(?s:.*X|^B)/D
------------------------------------------------------------------
0 27 Bra 0
3 10 Bra 0
6 04 Opt
8 Any*
10 1 X
13 9 Alt
16 04 Opt
18 ^
19 1 B
22 19 Ket
25 00 Opt
27 27 Ket
30 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
First char at start or follows \n
No need char
/\Biss\B/+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/\Biss\B/+P
Mississippi
0: iss
0+ issippi
/iss/G+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/\Biss\B/G+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/\Biss\B/g+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
*** Failers
No match
Mississippi\A
No match
/(?<=[Ms])iss/g+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/(?<=[Ms])iss/G+
Capturing subpattern count = 0
No options
First char = 'i'
Need char = 's'
Mississippi
0: iss
0+ issippi
/^iss/g+
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 's'
ississippi
0: iss
0+ issippi
/.*iss/g+
Capturing subpattern count = 0
No options
First char at start or follows \n
Need char = 's'
abciss\nxyzisspqr
0: abciss
0+ \x0axyzisspqr
0: xyziss
0+ pqr
/.i./+g
Capturing subpattern count = 0
No options
No first char
Need char = 'i'
Mississippi
0: Mis
0+ sissippi
0: sis
0+ sippi
0: sip
0+ pi
Mississippi\A
0: Mis
0+ sissippi
0: sis
0+ sippi
0: sip
0+ pi
Missouri river
0: Mis
0+ souri river
0: ri
0+ river
0: riv
0+ er
Missouri river\A
0: Mis
0+ souri river
/^.is/+g
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 's'
Mississippi
0: Mis
0+ sissippi
/^ab\n/g+
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 10
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
/^ab\n/mg+
Capturing subpattern count = 0
Options: multiline
First char at start or follows \n
Need char = 10
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
0: ab\x0a
0+ cd
/abc/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/abc|bac/
Capturing subpattern count = 0
No options
No first char
Need char = 'c'
/(abc|bac)/
Capturing subpattern count = 1
No options
No first char
Need char = 'c'
/(abc|(c|dc))/
Capturing subpattern count = 2
No options
No first char
Need char = 'c'
/(abc|(d|de)c)/
Capturing subpattern count = 2
No options
No first char
Need char = 'c'
/a*/
Capturing subpattern count = 0
No options
No first char
No need char
/a+/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/(baa|a+)/
Capturing subpattern count = 1
No options
No first char
Need char = 'a'
/a{0,3}/
Capturing subpattern count = 0
No options
No first char
No need char
/baa{3,}/
Capturing subpattern count = 0
No options
First char = 'b'
Need char = 'a'
/"([^\\"]+|\\.)*"/
Capturing subpattern count = 1
No options
First char = '"'
Need char = '"'
/(abc|ab[cd])/
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/(a|.)/
Capturing subpattern count = 1
No options
No first char
No need char
/a|ba|\w/
Capturing subpattern count = 0
No options
No first char
No need char
/abc(?=pqr)/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'r'
/...(?<=abc)/
Capturing subpattern count = 0
No options
No first char
No need char
/abc(?!pqr)/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'c'
/ab./
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/ab[xyz]/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/abc*/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/ab.c*/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/a.c*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/.c*/
Capturing subpattern count = 0
No options
No first char
No need char
/ac*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/(a.c*|b.c*)/
Capturing subpattern count = 1
No options
No first char
No need char
/a.c*|aba/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/.+a/
Capturing subpattern count = 0
No options
No first char
Need char = 'a'
/(?=abcda)a.*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/(?=a)a.*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/a(b)*/
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/a\d*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/ab\d*/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/a(\d)*/
Capturing subpattern count = 1
No options
First char = 'a'
No need char
/abcde{0,0}/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'd'
/ab\d+/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/a(?(1)b)/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/a(?(1)bag|big)/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'g'
/a(?(1)bag|big)*/
Capturing subpattern count = 0
No options
First char = 'a'
No need char
/a(?(1)bag|big)+/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'g'
/a(?(1)b..|b..)/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'b'
/ab\d{0}e/
Capturing subpattern count = 0
No options
First char = 'a'
Need char = 'e'
/a?b?/
Capturing subpattern count = 0
No options
No first char
No need char
a
0: a
b
0: b
ab
0: ab
\
0:
*** Failers
0:
\N
No match
/|-/
Capturing subpattern count = 0
No options
No first char
No need char
abcd
0:
-abc
0:
\Nab-c
0: -
*** Failers
0:
\Nabc
No match
/a*(b+)(z)(z)/P
aaaabbbbzzzz
0: aaaabbbbzz
1: bbbb
2: z
3: z
aaaabbbbzzzz\O0
aaaabbbbzzzz\O1
0: aaaabbbbzz
aaaabbbbzzzz\O2
0: aaaabbbbzz
1: bbbb
aaaabbbbzzzz\O3
0: aaaabbbbzz
1: bbbb
2: z
aaaabbbbzzzz\O4
0: aaaabbbbzz
1: bbbb
2: z
3: z
aaaabbbbzzzz\O5
0: aaaabbbbzz
1: bbbb
2: z
3: z
/^.?abcd/S
Capturing subpattern count = 0
Options: anchored
No first char
Need char = 'd'
Study returned NULL
/\( # ( at start
(?: # Non-capturing bracket
(?>[^()]+) # Either a sequence of non-brackets (no backtracking)
| # Or
(?R) # Recurse - i.e. nested bracketed string
)* # Zero or more contents
\) # Closing )
/x
Capturing subpattern count = 0
Options: extended
First char = '('
Need char = ')'
(abcd)
0: (abcd)
(abcd)xyz
0: (abcd)
xyz(abcd)
0: (abcd)
(ab(xy)cd)pqr
0: (ab(xy)cd)
(ab(xycd)pqr
0: (xycd)
() abc ()
0: ()
12(abcde(fsh)xyz(foo(bar))lmno)89
0: (abcde(fsh)xyz(foo(bar))lmno)
*** Failers
No match
abcd
No match
abcd)
No match
(abcd
No match
/\( ( (?>[^()]+) | (?R) )* \) /xg
Capturing subpattern count = 1
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)pqr
0: (ab(xy)cd)
1: cd
1(abcd)(x(y)z)pqr
0: (abcd)
1: abcd
0: (x(y)z)
1: z
/\( (?: (?>[^()]+) | (?R) ) \) /x
Capturing subpattern count = 0
Options: extended
First char = '('
Need char = ')'
(abcd)
0: (abcd)
(ab(xy)cd)
0: (xy)
(a(b(c)d)e)
0: (c)
((ab))
0: ((ab))
*** Failers
No match
()
No match
/\( (?: (?>[^()]+) | (?R) )? \) /x
Capturing subpattern count = 0
Options: extended
First char = '('
Need char = ')'
()
0: ()
12(abcde(fsh)xyz(foo(bar))lmno)89
0: (fsh)
/\( ( (?>[^()]+) | (?R) )* \) /x
Capturing subpattern count = 1
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: cd
/\( ( ( (?>[^()]+) | (?R) )* ) \) /x
Capturing subpattern count = 2
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: cd
/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x
Capturing subpattern count = 3
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: <unset>
2: ab(xy)cd
3: cd
(123ab(xy)cd)
0: (123ab(xy)cd)
1: 123
2: ab(xy)cd
3: cd
/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x
Capturing subpattern count = 3
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: <unset>
3: cd
(123ab(xy)cd)
0: (123ab(xy)cd)
1: 123ab(xy)cd
2: 123
3: cd
/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x
Capturing subpattern count = 11
Options: extended
First char = '('
Need char = ')'
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: ab(xy)cd
3: ab(xy)cd
4: ab(xy)cd
5: ab(xy)cd
6: ab(xy)cd
7: ab(xy)cd
8: ab(xy)cd
9: ab(xy)cd
10: ab(xy)cd
11: cd
/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x
Capturing subpattern count = 3
Options: extended
First char = '('
Need char = ')'
(abcd(xyz<p>qrs)123)
0: (abcd(xyz<p>qrs)123)
1: abcd(xyz<p>qrs)123
2: 123
3: <p>qrs
/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x
Capturing subpattern count = 3
Options: extended
First char = '('
Need char = ')'
(ab(cd)ef)
0: (ab(cd)ef)
1: ab(cd)ef
2: ef
3: (cd)
(ab(cd(ef)gh)ij)
0: (ab(cd(ef)gh)ij)
1: ab(cd(ef)gh)ij
2: ij
3: (cd(ef)gh)
/^[[:alnum:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Za-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:alpha:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [A-Za-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:ascii:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x7f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:cntrl:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-\x1f\x7f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:digit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:graph:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [!-~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:lower:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [a-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:print:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [ -~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:punct:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [!-/:-@[-`{-~]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:space:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x09-\x0d ]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:upper:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [A-Z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:xdigit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Fa-f]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:word:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [0-9A-Z_a-z]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[[:^cntrl:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [ -~\x80-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/^[12[:^digit:]]/D
------------------------------------------------------------------
0 37 Bra 0
3 ^
4 [\x00-/1-2:-\xff]
37 37 Ket
40 End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: anchored
No first char
No need char
/[01[:alpha:]%]/D
------------------------------------------------------------------
0 36 Bra 0
3 [%0-1A-Za-z]
36 36 Ket
39 End
------------------------------------------------------------------
Capturing subpattern count = 0
No options
No first char
No need char
/[[.ch.]]/
Failed: POSIX collating elements are not supported at offset 1
/[[=ch=]]/
Failed: POSIX collating elements are not supported at offset 1
/[[:rhubarb:]]/
Failed: unknown POSIX class name at offset 3
/[[:upper:]]/i
Capturing subpattern count = 0
Options: caseless
No first char
No need char
A
0: A
a
0: a
/[[:lower:]]/i
Capturing subpattern count = 0
Options: caseless
No first char
No need char
A
0: A
a
0: a
/((?-i)[[:lower:]])[[:lower:]]/i
Capturing subpattern count = 1
Options: caseless
Case state changes
No first char
No need char
ab
0: ab
1: a
aB
0: aB
1: a
*** Failers
0: ai
1: a
Ab
No match
AB
No match
/[\200-\410]/
Failed: range out of order in character class at offset 9
/^(?(0)f|b)oo/
Failed: invalid condition (?(0) at offset 5
/This one's here because of the large output vector needed/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 'd'
/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/
Capturing subpattern count = 271
Max back reference = 270
No options
No first char
No need char
\O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
0: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
1: 1
2: 2
3: 3
4: 4
5: 5
6: 6
7: 7
8: 8
9: 9
10: 10
11: 11
12: 12
13: 13
14: 14
15: 15
16: 16
17: 17
18: 18
19: 19
20: 20
21: 21
22: 22
23: 23
24: 24
25: 25
26: 26
27: 27
28: 28
29: 29
30: 30
31: 31
32: 32
33: 33
34: 34
35: 35
36: 36
37: 37
38: 38
39: 39
40: 40
41: 41
42: 42
43: 43
44: 44
45: 45
46: 46
47: 47
48: 48
49: 49
50: 50
51: 51
52: 52
53: 53
54: 54
55: 55
56: 56
57: 57
58: 58
59: 59
60: 60
61: 61
62: 62
63: 63
64: 64
65: 65
66: 66
67: 67
68: 68
69: 69
70: 70
71: 71
72: 72
73: 73
74: 74
75: 75
76: 76
77: 77
78: 78
79: 79
80: 80
81: 81
82: 82
83: 83
84: 84
85: 85
86: 86
87: 87
88: 88
89: 89
90: 90
91: 91
92: 92
93: 93
94: 94
95: 95
96: 96
97: 97
98: 98
99: 99
100: 100
101: 101
102: 102
103: 103
104: 104
105: 105
106: 106
107: 107
108: 108
109: 109
110: 110
111: 111
112: 112
113: 113
114: 114
115: 115
116: 116
117: 117
118: 118
119: 119
120: 120
121: 121
122: 122
123: 123
124: 124
125: 125
126: 126
127: 127
128: 128
129: 129
130: 130
131: 131
132: 132
133: 133
134: 134
135: 135
136: 136
137: 137
138: 138
139: 139
140: 140
141: 141
142: 142
143: 143
144: 144
145: 145
146: 146
147: 147
148: 148
149: 149
150: 150
151: 151
152: 152
153: 153
154: 154
155: 155
156: 156
157: 157
158: 158
159: 159
160: 160
161: 161
162: 162
163: 163
164: 164
165: 165
166: 166
167: 167
168: 168
169: 169
170: 170
171: 171
172: 172
173: 173
174: 174
175: 175
176: 176
177: 177
178: 178
179: 179
180: 180
181: 181
182: 182
183: 183
184: 184
185: 185
186: 186
187: 187
188: 188
189: 189
190: 190
191: 191
192: 192
193: 193
194: 194
195: 195
196: 196
197: 197
198: 198
199: 199
200: 200
201: 201
202: 202
203: 203
204: 204
205: 205
206: 206
207: 207
208: 208
209: 209
210: 210
211: 211
212: 212
213: 213
214: 214
215: 215
216: 216
217: 217
218: 218
219: 219
220: 220
221: 221
222: 222
223: 223
224: 224
225: 225
226: 226
227: 227
228: 228
229: 229
230: 230
231: 231
232: 232
233: 233
234: 234
235: 235
236: 236
237: 237
238: 238
239: 239
240: 240
241: 241
242: 242
243: 243
244: 244
245: 245
246: 246
247: 247
248: 248
249: 249
250: 250
251: 251
252: 252
253: 253
254: 254
255: 255
256: 256
257: 257
258: 258
259: 259
260: 260
261: 261
262: 262
263: 263
264: 264
265: 265
266: 266
267: 267
268: 268
269: 269
270: ABC
271: ABC
/This one's here because Perl does this differently and PCRE can't at present/
Capturing subpattern count = 0
No options
First char = 'T'
Need char = 't'
/(main(O)?)+/
Capturing subpattern count = 2
No options
First char = 'm'
Need char = 'n'
mainmain
0: mainmain
1: main
mainOmain
0: mainOmain
1: main
2: O
/ End of testinput2 /
Capturing subpattern count = 0
No options
First char = ' '
Need char = ' '