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# This set of tests is not Perl-compatible. It checks on special features
# of PCRE2's API, error diagnostics, and the compiled code of some patterns.
# It also checks the non-Perl syntax that PCRE2 supports (Python, .NET,
# Oniguruma). There are also some tests where PCRE2 and Perl differ,
# either because PCRE2 can't be compatible, or there is a possible Perl
# bug.
# NOTE: This is a non-UTF set of tests. When UTF support is needed, use
# test 5.
#forbid_utf
#newline_default lf any anycrlf
# Test binary zeroes in the pattern
# /a\0B/ where 0 is a binary zero
/61 5c 00 62/B,hex
------------------------------------------------------------------
Bra
a\x00b
Ket
End
------------------------------------------------------------------
a\x{0}b
0: a\x00b
# /a0b/ where 0 is a binary zero
/61 00 62/B,hex
------------------------------------------------------------------
Bra
a\x00b
Ket
End
------------------------------------------------------------------
a\x{0}b
0: a\x00b
# /(?#B0C)DE/ where 0 is a binary zero
/28 3f 23 42 00 43 29 44 45/B,hex
------------------------------------------------------------------
Bra
DE
Ket
End
------------------------------------------------------------------
DE
0: DE
/(a)b|/I
Capture group count = 1
May match empty string
Subject length lower bound = 0
/abc/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
defabc
0: abc
abc\=anchored
0: abc
\= Expect no match
defabc\=anchored
No match
ABC
No match
/^abc/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
abc
0: abc
abc\=anchored
0: abc
\= Expect no match
defabc
No match
defabc\=anchored
No match
/a+bc/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/a*bc/I
Capture group count = 0
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 2
/a{3}bc/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 5
/(abc|a+z)/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 2
/^abc$/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
abc
0: abc
\= Expect no match
def\nabc
No match
/ab\idef/
Failed: error 103 at offset 3: unrecognized character follows \
/(?X)ab\idef/
Failed: error 111 at offset 2: unrecognized character after (? or (?-
/x{5,4}/
Failed: error 104 at offset 5: numbers out of order in {} quantifier
/z{65536}/
Failed: error 105 at offset 7: number too big in {} quantifier
/[abcd/
Failed: error 106 at offset 5: missing terminating ] for character class
/[\B]/B
Failed: error 107 at offset 2: escape sequence is invalid in character class
/[\R]/B
Failed: error 107 at offset 2: escape sequence is invalid in character class
/[\X]/B
Failed: error 107 at offset 2: escape sequence is invalid in character class
/[z-a]/
Failed: error 108 at offset 3: range out of order in character class
/^*/
Failed: error 109 at offset 1: quantifier does not follow a repeatable item
/(abc/
Failed: error 114 at offset 4: missing closing parenthesis
/(?# abc/
Failed: error 118 at offset 7: missing ) after (?# comment
/(?z)abc/
Failed: error 111 at offset 2: unrecognized character after (? or (?-
/.*b/I
Capture group count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 1
/.*?b/I
Capture group count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 1
/cat|dog|elephant/I
Capture group count = 0
Starting code units: c d e
Subject length lower bound = 3
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/I
Capture group count = 0
Starting code units: c d e
Subject length lower bound = 3
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/Ii
Capture group count = 0
Options: caseless
Starting code units: C D E c d e
Subject length lower bound = 3
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]/I
Capture group count = 0
Starting code units: a b c d
Subject length lower bound = 1
/(a|[^\dZ])/I
Capture group count = 1
Starting code units: \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
Subject length lower bound = 1
/(a|b)*[\s]/I
Capture group count = 1
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 a b
Subject length lower bound = 1
/(ab\2)/
Failed: error 115 at offset 4: reference to non-existent subpattern
/{4,5}abc/
Failed: error 109 at offset 4: quantifier does not follow a repeatable item
/(a)(b)(c)\2/I
Capture group count = 3
Max back reference = 2
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 4
abcb
0: abcb
1: a
2: b
3: c
abcb\=ovector=0
0: abcb
1: a
2: b
3: c
abcb\=ovector=1
Matched, but too many substrings
0: abcb
abcb\=ovector=2
Matched, but too many substrings
0: abcb
1: a
abcb\=ovector=3
Matched, but too many substrings
0: abcb
1: a
2: b
abcb\=ovector=4
0: abcb
1: a
2: b
3: c
/(a)bc|(a)(b)\2/I
Capture group count = 3
Max back reference = 2
First code unit = 'a'
Subject length lower bound = 3
abc
0: abc
1: a
abc\=ovector=0
0: abc
1: a
abc\=ovector=1
Matched, but too many substrings
0: abc
abc\=ovector=2
0: abc
1: a
aba
0: aba
1: <unset>
2: a
3: b
aba\=ovector=0
0: aba
1: <unset>
2: a
3: b
aba\=ovector=1
Matched, but too many substrings
0: aba
aba\=ovector=2
Matched, but too many substrings
0: aba
1: <unset>
aba\=ovector=3
Matched, but too many substrings
0: aba
1: <unset>
2: a
aba\=ovector=4
0: aba
1: <unset>
2: a
3: b
/abc$/I,dollar_endonly
Capture group count = 0
Options: dollar_endonly
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
\= Expect no match
abc\n
No match
abc\ndef
No match
/(a)(b)(c)(d)(e)\6/
Failed: error 115 at offset 16: reference to non-existent subpattern
/the quick brown fox/I
Capture group count = 0
First code unit = 't'
Last code unit = 'x'
Subject length lower bound = 19
the quick brown fox
0: the quick brown fox
this is a line with the quick brown fox
0: the quick brown fox
/the quick brown fox/I,anchored
Capture group count = 0
Options: anchored
First code unit = 't'
Subject length lower bound = 19
the quick brown fox
0: the quick brown fox
\= Expect no match
this is a line with the quick brown fox
No match
/ab(?z)cd/
Failed: error 111 at offset 4: unrecognized character after (? or (?-
/^abc|def/I
Capture group count = 0
Starting code units: a d
Subject length lower bound = 3
abcdef
0: abc
abcdef\=notbol
0: def
/.*((abc)$|(def))/I
Capture group count = 3
First code unit at start or follows newline
Subject length lower bound = 3
defabc
0: defabc
1: abc
2: abc
defabc\=noteol
0: def
1: def
2: <unset>
3: def
/)/
Failed: error 122 at offset 0: unmatched closing parenthesis
/a[]b/
Failed: error 106 at offset 4: missing terminating ] for character class
/[^aeiou ]{3,}/I
Capture group count = 0
Starting code units: \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 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6
7 8 9 : ; < = > ? @ 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 [
\ ] ^ _ ` b c d f g h j k l m n p q r s t 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
Subject length lower bound = 3
co-processors, and for
0: -pr
/<.*>/I
Capture group count = 0
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/<.*?>/I
Capture group count = 0
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/<.*>/I,ungreedy
Capture group count = 0
Options: ungreedy
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/(?U)<.*>/I
Capture group count = 0
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/<.*?>/I,ungreedy
Capture group count = 0
Options: ungreedy
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/={3,}/I,ungreedy
Capture group count = 0
Options: ungreedy
First code unit = '='
Last code unit = '='
Subject length lower bound = 3
abc========def
0: ===
/(?U)={3,}?/I
Capture group count = 0
First code unit = '='
Last code unit = '='
Subject length lower bound = 3
abc========def
0: ========
/(?<!bar|cattle)foo/I
Capture group count = 0
Max lookbehind = 6
First code unit = 'f'
Last code unit = 'o'
Subject length lower bound = 3
foo
0: foo
catfoo
0: foo
\= Expect no match
the barfoo
No match
and cattlefoo
No match
/abc(?<=a+)b/
Failed: error 125 at offset 3: lookbehind assertion is not fixed length
/12345(?<=aaa|b{0,3})b/
Failed: error 125 at offset 5: lookbehind assertion is not fixed length
/(?<!(foo)a\1)bar/
/(?i)abc/I
Capture group count = 0
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/(a|(?m)a)/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?i)^1234/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = '1'
Subject length lower bound = 4
/(^b|(?i)^d)/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
Starting code units: D b d
Subject length lower bound = 1
/(?s).*/I
Capture group count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/[abcd]/I
Capture group count = 0
Starting code units: a b c d
Subject length lower bound = 1
/(?i)[abcd]/I
Capture group count = 0
Starting code units: A B C D a b c d
Subject length lower bound = 1
/(?m)[xy]|(b|c)/I
Capture group count = 1
Starting code units: b c x y
Subject length lower bound = 1
/(^a|^b)/Im
Capture group count = 1
Options: multiline
First code unit at start or follows newline
Subject length lower bound = 1
/(?i)(^a|^b)/Im
Capture group count = 1
Options: multiline
First code unit at start or follows newline
Subject length lower bound = 1
/(a)(?(1)a|b|c)/
Failed: error 127 at offset 3: conditional subpattern contains more than two branches
/(?(?=a)a|b|c)/
Failed: error 127 at offset 0: conditional subpattern contains more than two branches
/(?(1a)/
Failed: error 124 at offset 4: missing closing parenthesis for condition
/(?(1a))/
Failed: error 124 at offset 4: missing closing parenthesis for condition
/(?(?i))/
Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
/(?(abc))/
Failed: error 115 at offset 3: reference to non-existent subpattern
/(?(?<ab))/
Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
/((?s)blah)\s+\1/I
Capture group count = 1
Max back reference = 1
First code unit = 'b'
Last code unit = 'h'
Subject length lower bound = 9
/((?i)blah)\s+\1/I
Capture group count = 1
Max back reference = 1
First code unit = 'b' (caseless)
Last code unit = 'h' (caseless)
Subject length lower bound = 9
/((?i)b)/IB
------------------------------------------------------------------
Bra
CBra 1
/i b
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'b' (caseless)
Subject length lower bound = 1
/(a*b|(?i:c*(?-i)d))/I
Capture group count = 1
Starting code units: C a b c d
Subject length lower bound = 1
/a$/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
a
0: a
a\n
0: a
\= Expect no match
a\=noteol
No match
a\n\=noteol
No match
/a$/Im
Capture group count = 0
Options: multiline
First code unit = 'a'
Subject length lower bound = 1
a
0: a
a\n
0: a
a\n\=noteol
0: a
\= Expect no match
a\=noteol
No match
/\Aabc/Im
Capture group count = 0
Max lookbehind = 1
Compile options: multiline
Overall options: anchored multiline
First code unit = 'a'
Subject length lower bound = 3
/^abc/Im
Capture group count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I
Capture group count = 5
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
aaaaabbbbbcccccdef
0: aaaaabbbbbcccccdef
1: aaaaabbbbbcccccdef
2: aaaaa
3: b
4: bbbbccccc
5: def
/(?<=foo)[ab]/I
Capture group count = 0
Max lookbehind = 3
Starting code units: a b
Subject length lower bound = 1
/(?<!foo)(alpha|omega)/I
Capture group count = 1
Max lookbehind = 3
Starting code units: a o
Last code unit = 'a'
Subject length lower bound = 5
/(?!alphabet)[ab]/I
Capture group count = 0
Starting code units: a b
Subject length lower bound = 1
/(?<=foo\n)^bar/Im
Capture group count = 0
Max lookbehind = 4
Contains explicit CR or LF match
Options: multiline
Last code unit = 'r'
Subject length lower bound = 3
foo\nbarbar
0: bar
\= Expect no match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/^(?<=foo\n)bar/Im
Capture group count = 0
Max lookbehind = 4
Contains explicit CR or LF match
Options: multiline
First code unit at start or follows newline
Last code unit = 'r'
Subject length lower bound = 3
foo\nbarbar
0: bar
\= Expect no match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/(?>^abc)/Im
Capture group count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
def\nabc
0: abc
\= Expect no match
defabc
No match
/(?<=ab(c+)d)ef/
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/(?<=ab(?<=c+)d)ef/
Failed: error 125 at offset 6: lookbehind assertion is not fixed length
/(?<=ab(c|de)f)g/
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/The next three are in testinput2 because they have variable length branches/
/(?<=bullock|donkey)-cart/I
Capture group count = 0
Max lookbehind = 7
First code unit = '-'
Last code unit = 't'
Subject length lower bound = 5
the bullock-cart
0: -cart
a donkey-cart race
0: -cart
\= Expect no match
cart
No match
horse-and-cart
No match
/(?<=ab(?i)x|y|z)/I
Capture group count = 0
Max lookbehind = 3
May match empty string
Subject length lower bound = 0
/(?>.*)(?<=(abcd)|(xyz))/I
Capture group count = 2
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
alphabetabcd
0: alphabetabcd
1: abcd
endingxyz
0: endingxyz
1: <unset>
2: xyz
/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I
Capture group count = 0
Max lookbehind = 4
First code unit = 'Z'
Last code unit = 'Z'
Subject length lower bound = 2
abxyZZ
0: ZZ
abXyZZ
0: ZZ
ZZZ
0: ZZ
zZZ
0: ZZ
bZZ
0: ZZ
BZZ
0: ZZ
\= Expect no match
ZZ
No match
abXYZZ
No match
zzz
No match
bzz
No match
/(?<!(foo)a)bar/I
Capture group count = 1
Max lookbehind = 4
First code unit = 'b'
Last code unit = 'r'
Subject length lower bound = 3
bar
0: bar
foobbar
0: bar
\= Expect no match
fooabar
No match
# Perl does not fail these two for the final subjects.
/^(xa|=?\1a){2}$/
xa=xaa
0: xa=xaa
1: =xaa
\= Expect no match
xa=xaaa
No match
/^(xa|=?\1a)+$/
xa=xaa
0: xa=xaa
1: =xaa
\= Expect no match
xa=xaaa
No match
# These are syntax tests from Perl 5.005
/a[b-a]/
Failed: error 108 at offset 4: range out of order in character class
/a[]b/
Failed: error 106 at offset 4: missing terminating ] for character class
/a[/
Failed: error 106 at offset 2: missing terminating ] for character class
/*a/
Failed: error 109 at offset 0: quantifier does not follow a repeatable item
/(*)b/
Failed: error 109 at offset 1: quantifier does not follow a repeatable item
/abc)/
Failed: error 122 at offset 3: unmatched closing parenthesis
/(abc/
Failed: error 114 at offset 4: missing closing parenthesis
/a**/
Failed: error 109 at offset 2: quantifier does not follow a repeatable item
/)(/
Failed: error 122 at offset 0: unmatched closing parenthesis
/\1/
Failed: error 115 at offset 1: reference to non-existent subpattern
/\2/
Failed: error 115 at offset 1: reference to non-existent subpattern
/(a)|\2/
Failed: error 115 at offset 5: reference to non-existent subpattern
/a[b-a]/Ii
Failed: error 108 at offset 4: range out of order in character class
/a[]b/Ii
Failed: error 106 at offset 4: missing terminating ] for character class
/a[/Ii
Failed: error 106 at offset 2: missing terminating ] for character class
/*a/Ii
Failed: error 109 at offset 0: quantifier does not follow a repeatable item
/(*)b/Ii
Failed: error 109 at offset 1: quantifier does not follow a repeatable item
/abc)/Ii
Failed: error 122 at offset 3: unmatched closing parenthesis
/(abc/Ii
Failed: error 114 at offset 4: missing closing parenthesis
/a**/Ii
Failed: error 109 at offset 2: quantifier does not follow a repeatable item
/)(/Ii
Failed: error 122 at offset 0: unmatched closing parenthesis
/:(?:/
Failed: error 114 at offset 4: missing closing parenthesis
/(?<%)b/
Failed: error 162 at offset 3: subpattern name expected
/a(?{)b/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/a(?{{})b/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/a(?{}})b/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/a(?{"{"})b/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/a(?{"{"}})b/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/(?(1?)a|b)/
Failed: error 124 at offset 4: missing closing parenthesis for condition
/[a[:xyz:/
Failed: error 106 at offset 8: missing terminating ] for character class
/(?<=x+)y/
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/a{37,17}/
Failed: error 104 at offset 7: numbers out of order in {} quantifier
/abc/\
Failed: error 101 at offset 4: \ at end of pattern
/abc/\i
Failed: error 101 at offset 4: \ at end of pattern
/(a)bc(d)/I
Capture group count = 2
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
abcd
0: abcd
1: a
2: d
abcd\=copy=2
0: abcd
1: a
2: d
2C d (1)
abcd\=copy=5
0: abcd
1: a
2: d
Copy substring 5 failed (-49): unknown substring
/(.{20})/I
Capture group count = 1
Subject length lower bound = 20
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
abcdefghijklmnopqrstuvwxyz\=copy=1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
1C abcdefghijklmnopqrst (20)
abcdefghijklmnopqrstuvwxyz\=get=1
0: abcdefghijklmnopqrst
1: abcdefghijklmnopqrst
1G abcdefghijklmnopqrst (20)
/(.{15})/I
Capture group count = 1
Subject length lower bound = 15
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmno
1: abcdefghijklmno
abcdefghijklmnopqrstuvwxyz\=copy=1,get=1
0: abcdefghijklmno
1: abcdefghijklmno
1C abcdefghijklmno (15)
1G abcdefghijklmno (15)
/(.{16})/I
Capture group count = 1
Subject length lower bound = 16
abcdefghijklmnopqrstuvwxyz
0: abcdefghijklmnop
1: abcdefghijklmnop
abcdefghijklmnopqrstuvwxyz\=copy=1,get=1,getall
0: abcdefghijklmnop
1: abcdefghijklmnop
1C abcdefghijklmnop (16)
1G abcdefghijklmnop (16)
0L abcdefghijklmnop
1L abcdefghijklmnop
/^(a|(bc))de(f)/I
Capture group count = 3
Compile options: <none>
Overall options: anchored
Starting code units: a b
Subject length lower bound = 4
adef\=get=1,get=2,get=3,get=4,getall
0: adef
1: a
2: <unset>
3: f
1G a (1)
Get substring 2 failed (-55): requested value is not set
3G f (1)
Get substring 4 failed (-49): unknown substring
0L adef
1L a
2L
3L f
bcdef\=get=1,get=2,get=3,get=4,getall
0: bcdef
1: bc
2: bc
3: f
1G bc (2)
2G bc (2)
3G f (1)
Get substring 4 failed (-49): unknown substring
0L bcdef
1L bc
2L bc
3L f
adefghijk\=copy=0
0: adef
1: a
2: <unset>
3: f
0C adef (4)
/^abc\00def/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 7
abc\00def\=copy=0,getall
0: abc\x00def
0C abc\x00def (7)
0L abc\x00def
/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/I
Capture group count = 8
Contains explicit CR or LF match
First code unit = 'w'
Last code unit = 'd'
Subject length lower bound = 14
/.*X/IB
------------------------------------------------------------------
Bra
Any*
X
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit at start or follows newline
Last code unit = 'X'
Subject length lower bound = 1
/.*X/IBs
------------------------------------------------------------------
Bra
AllAny*
X
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'X'
Subject length lower bound = 1
/(.*X|^B)/IB
------------------------------------------------------------------
Bra
CBra 1
Any*
X
Alt
^
B
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit at start or follows newline
Subject length lower bound = 1
/(.*X|^B)/IBs
------------------------------------------------------------------
Bra
CBra 1
AllAny*
X
Alt
^
B
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 1
/(?s)(.*X|^B)/IB
------------------------------------------------------------------
Bra
CBra 1
AllAny*
X
Alt
^
B
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/(?s:.*X|^B)/IB
------------------------------------------------------------------
Bra
Bra
AllAny*
X
Alt
^
B
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/\Biss\B/I,aftertext
Capture group count = 0
Max lookbehind = 1
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
/iss/I,aftertext,altglobal
Capture group count = 0
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/\Biss\B/I,aftertext,altglobal
Capture group count = 0
Max lookbehind = 1
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
/\Biss\B/Ig,aftertext
Capture group count = 0
Max lookbehind = 1
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
\= Expect no match
Mississippi\=anchored
No match
/(?<=[Ms])iss/Ig,aftertext
Capture group count = 0
Max lookbehind = 1
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
0: iss
0+ ippi
/(?<=[Ms])iss/I,aftertext,altglobal
Capture group count = 0
Max lookbehind = 1
First code unit = 'i'
Last code unit = 's'
Subject length lower bound = 3
Mississippi
0: iss
0+ issippi
/^iss/Ig,aftertext
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'i'
Subject length lower bound = 3
ississippi
0: iss
0+ issippi
/.*iss/Ig,aftertext
Capture group count = 0
First code unit at start or follows newline
Last code unit = 's'
Subject length lower bound = 3
abciss\nxyzisspqr
0: abciss
0+ \x0axyzisspqr
0: xyziss
0+ pqr
/.i./Ig,aftertext
Capture group count = 0
Last code unit = 'i'
Subject length lower bound = 3
Mississippi
0: Mis
0+ sissippi
0: sis
0+ sippi
0: sip
0+ pi
Mississippi\=anchored
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\=anchored
0: Mis
0+ souri river
/^.is/Ig,aftertext
Capture group count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
Mississippi
0: Mis
0+ sissippi
/^ab\n/Ig,aftertext
Capture group count = 0
Contains explicit CR or LF match
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
/^ab\n/Igm,aftertext
Capture group count = 0
Contains explicit CR or LF match
Options: multiline
First code unit at start or follows newline
Last code unit = \x0a
Subject length lower bound = 3
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
0: ab\x0a
0+ cd
/^/gm,newline=any
a\rb\nc\r\nxyz\=aftertext
0:
0+ a\x0db\x0ac\x0d\x0axyz
0:
0+ b\x0ac\x0d\x0axyz
0:
0+ c\x0d\x0axyz
0:
0+ xyz
/abc/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/abc|bac/I
Capture group count = 0
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(abc|bac)/I
Capture group count = 1
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(abc|(c|dc))/I
Capture group count = 2
Starting code units: a c d
Last code unit = 'c'
Subject length lower bound = 1
/(abc|(d|de)c)/I
Capture group count = 2
Starting code units: a d
Last code unit = 'c'
Subject length lower bound = 2
/a*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
/a+/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/(baa|a+)/I
Capture group count = 1
Starting code units: a b
Last code unit = 'a'
Subject length lower bound = 1
/a{0,3}/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
/baa{3,}/I
Capture group count = 0
First code unit = 'b'
Last code unit = 'a'
Subject length lower bound = 5
/"([^\\"]+|\\.)*"/I
Capture group count = 1
First code unit = '"'
Last code unit = '"'
Subject length lower bound = 2
/(abc|ab[cd])/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 3
/(a|.)/I
Capture group count = 1
Subject length lower bound = 1
/a|ba|\w/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Subject length lower bound = 1
/abc(?=pqr)/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'r'
Subject length lower bound = 3
/...(?<=abc)/I
Capture group count = 0
Max lookbehind = 3
Subject length lower bound = 3
/abc(?!pqr)/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/ab./I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/ab[xyz]/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/abc*/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/ab.c*/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/a.c*/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 2
/.c*/I
Capture group count = 0
Subject length lower bound = 1
/ac*/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/(a.c*|b.c*)/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 2
/a.c*|aba/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 2
/.+a/I
Capture group count = 0
Last code unit = 'a'
Subject length lower bound = 2
/(?=abcda)a.*/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 2
/(?=a)a.*/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/a(b)*/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/a\d*/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/ab\d*/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/a(\d)*/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/abcde{0,0}/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
/ab\d+/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/a(?(1)b)(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Subject length lower bound = 2
/a(?(1)bag|big)(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Last code unit = 'g'
Subject length lower bound = 5
/a(?(1)bag|big)*(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Subject length lower bound = 2
/a(?(1)bag|big)+(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Last code unit = 'g'
Subject length lower bound = 5
/a(?(1)b..|b..)(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 5
/ab\d{0}e/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'e'
Subject length lower bound = 3
/a?b?/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
a
0: a
b
0: b
ab
0: ab
\
0:
\= Expect no match
\=notempty
No match
/|-/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
abcd
0:
-abc
0:
ab-c\=notempty
0: -
\= Expect no match
abc\=notempty
No match
/^.?abcd/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'd'
Subject length lower bound = 4
/\( # ( at start
(?: # Non-capturing bracket
(?>[^()]+) # Either a sequence of non-brackets (no backtracking)
| # Or
(?R) # Recurse - i.e. nested bracketed string
)* # Zero or more contents
\) # Closing )
/Ix
Capture group count = 0
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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)
\= Expect no match
abcd
No match
abcd)
No match
(abcd
No match
/\( ( (?>[^()]+) | (?R) )* \) /Igx
Capture group count = 1
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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
/\( (?: (?>[^()]+) | (?R) ) \) /Ix
Capture group count = 0
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 3
(abcd)
0: (abcd)
(ab(xy)cd)
0: (xy)
(a(b(c)d)e)
0: (c)
((ab))
0: ((ab))
\= Expect no match
()
No match
/\( (?: (?>[^()]+) | (?R) )? \) /Ix
Capture group count = 0
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
()
0: ()
12(abcde(fsh)xyz(foo(bar))lmno)89
0: (fsh)
/\( ( (?>[^()]+) | (?R) )* \) /Ix
Capture group count = 1
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(ab(xy)cd)
0: (ab(xy)cd)
1: cd
/\( ( ( (?>[^()]+) | (?R) )* ) \) /Ix
Capture group count = 2
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(ab(xy)cd)
0: (ab(xy)cd)
1: ab(xy)cd
2: cd
/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /Ix
Capture group count = 3
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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
/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /Ix
Capture group count = 3
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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
/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /Ix
Capture group count = 11
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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
/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /Ix
Capture group count = 3
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(abcd(xyz<p>qrs)123)
0: (abcd(xyz<p>qrs)123)
1: abcd(xyz<p>qrs)123
2: 123
/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /Ix
Capture group count = 3
Options: extended
First code unit = '('
Last code unit = ')'
Subject length lower bound = 2
(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:]]/IB
------------------------------------------------------------------
Bra
^
[0-9A-Za-z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 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
Subject length lower bound = 1
/^[[:^alnum:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-/:-@[-`{-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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 ! " # $ % & ' ( ) * + , - . / : ; < = >
? @ [ \ ] ^ _ ` { | } ~ \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
Subject length lower bound = 1
/^[[:alpha:]]/IB
------------------------------------------------------------------
Bra
^
[A-Za-z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 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
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
Subject length lower bound = 1
/^[[:^alpha:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-@[-`{-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4
5 6 7 8 9 : ; < = > ? @ [ \ ] ^ _ ` { | } ~ \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
Subject length lower bound = 1
/[_[:alpha:]]/I
Capture group count = 0
Starting code units: 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
_ 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
Subject length lower bound = 1
/^[[:ascii:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x7f]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4
5 6 7 8 9 : ; < = > ? @ 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 [ \ ] ^ _ ` 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
Subject length lower bound = 1
/^[[:^ascii:]]/IB
------------------------------------------------------------------
Bra
^
[\x80-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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
Subject length lower bound = 1
/^[[:blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x09 ]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x09 \x20
Subject length lower bound = 1
/^[[:^blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x08\x0a-\x1f!-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0a \x0b
\x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a
\x1b \x1c \x1d \x1e \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9
: ; < = > ? @ 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 [ \ ] ^
_ ` 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
Subject length lower bound = 1
/[\n\x0b\x0c\x0d[:blank:]]/I
Capture group count = 0
Contains explicit CR or LF match
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/^[[:cntrl:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x1f\x7f]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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 \x7f
Subject length lower bound = 1
/^[[:digit:]]/IB
------------------------------------------------------------------
Bra
^
[0-9]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9
Subject length lower bound = 1
/^[[:graph:]]/IB
------------------------------------------------------------------
Bra
^
[!-~]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 :
; < = > ? @ 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 [ \ ] ^ _
` 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 { | } ~
Subject length lower bound = 1
/^[[:lower:]]/IB
------------------------------------------------------------------
Bra
^
[a-z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 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
Subject length lower bound = 1
/^[[:print:]]/IB
------------------------------------------------------------------
Bra
^
[ -~]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8
9 : ; < = > ? @ 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 [ \ ]
^ _ ` 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 { | } ~
Subject length lower bound = 1
/^[[:punct:]]/IB
------------------------------------------------------------------
Bra
^
[!-/:-@[-`{-~]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^
_ ` { | } ~
Subject length lower bound = 1
/^[[:space:]]/IB
------------------------------------------------------------------
Bra
^
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/^[[:upper:]]/IB
------------------------------------------------------------------
Bra
^
[A-Z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 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
Subject length lower bound = 1
/^[[:xdigit:]]/IB
------------------------------------------------------------------
Bra
^
[0-9A-Fa-f]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f
Subject length lower bound = 1
/^[[:word:]]/IB
------------------------------------------------------------------
Bra
^
[0-9A-Z_a-z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Subject length lower bound = 1
/^[[:^cntrl:]]/IB
------------------------------------------------------------------
Bra
^
[ -~\x80-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x20 ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8
9 : ; < = > ? @ 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 [ \ ]
^ _ ` 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 { | } ~ \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
Subject length lower bound = 1
/^[12[:^digit:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-/12:-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \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 ! " # $ % & ' ( ) * + , - . / 1 2 : ; <
= > ? @ 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 [ \ ] ^ _ ` 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
Subject length lower bound = 1
/^[[:^blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x08\x0a-\x1f!-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0a \x0b
\x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a
\x1b \x1c \x1d \x1e \x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9
: ; < = > ? @ 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 [ \ ] ^
_ ` 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
Subject length lower bound = 1
/[01[:alpha:]%]/IB
------------------------------------------------------------------
Bra
[%01A-Za-z]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: % 0 1 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 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
Subject length lower bound = 1
/[[.ch.]]/I
Failed: error 113 at offset 1: POSIX collating elements are not supported
/[[=ch=]]/I
Failed: error 113 at offset 1: POSIX collating elements are not supported
/[[:rhubarb:]]/I
Failed: error 130 at offset 3: unknown POSIX class name
/[[:upper:]]/Ii
Capture group count = 0
Options: caseless
Starting code units: 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
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
Subject length lower bound = 1
A
0: A
a
0: a
/[[:lower:]]/Ii
Capture group count = 0
Options: caseless
Starting code units: 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
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
Subject length lower bound = 1
A
0: A
a
0: a
/((?-i)[[:lower:]])[[:lower:]]/Ii
Capture group count = 1
Options: caseless
Starting code units: 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
Subject length lower bound = 2
ab
0: ab
1: a
aB
0: aB
1: a
\= Expect no match
Ab
No match
AB
No match
/[\200-\110]/I
Failed: error 108 at offset 9: range out of order in character class
/^(?(0)f|b)oo/I
Failed: error 115 at offset 5: reference to non-existent subpattern
# This one's here because of the large output vector needed
/(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\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)/I
Capture group count = 271
Max back reference = 270
Starting code units: 0 1 2 3 4 5 6 7 8 9
Subject length lower bound = 1
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\=ovector=300
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 PCRE2 can't at present
/(main(O)?)+/I
Capture group count = 2
First code unit = 'm'
Last code unit = 'n'
Subject length lower bound = 4
mainmain
0: mainmain
1: main
mainOmain
0: mainOmain
1: main
2: O
# These are all cases where Perl does it differently (nested captures)
/^(a(b)?)+$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 1
aba
0: aba
1: a
2: b
/^(aa(bb)?)+$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa|aa(bb))+$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa(bb)??)+$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(?:aa(bb)?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
/^(aa(b(b))?)+$/I
Capture group count = 3
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
3: b
/^(?:aa(b(b))?)+$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
2: b
/^(?:aa(b(?:b))?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
/^(?:aa(bb(?:b))?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(b(?:bb))?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(?:b(b))?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbaa
0: aabbaa
1: b
/^(?:aa(?:b(bb))?)+$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bb
/^(aa(b(bb))?)+$/I
Capture group count = 3
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: aa
2: bbb
3: bb
/^(aa(bb(bb))?)+$/I
Capture group count = 3
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
aabbbbaa
0: aabbbbaa
1: aa
2: bbbb
3: bb
# ----------------
/#/IBx
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capture group count = 0
May match empty string
Options: extended
Subject length lower bound = 0
/a#/IBx
------------------------------------------------------------------
Bra
a
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: extended
First code unit = 'a'
Subject length lower bound = 1
/[\s]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/[\S]/IB
------------------------------------------------------------------
Bra
[\x00-\x08\x0e-\x1f!-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x0e \x0f
\x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19 \x1a \x1b \x1c \x1d \x1e
\x1f ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ 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 [ \ ] ^ _ ` 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
Subject length lower bound = 1
/a(?i)b/IB
------------------------------------------------------------------
Bra
a
/i b
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a'
Last code unit = 'b' (caseless)
Subject length lower bound = 2
ab
0: ab
aB
0: aB
\= Expect no match
AB
No match
/(a(?i)b)/IB
------------------------------------------------------------------
Bra
CBra 1
a
/i b
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'a'
Last code unit = 'b' (caseless)
Subject length lower bound = 2
ab
0: ab
1: ab
aB
0: aB
1: aB
\= Expect no match
AB
No match
/ (?i)abc/IBx
------------------------------------------------------------------
Bra
/i abc
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: extended
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/#this is a comment
(?i)abc/IBx
------------------------------------------------------------------
Bra
/i abc
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: extended
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
------------------------------------------------------------------
Bra
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = '1'
Last code unit = '0'
Subject length lower bound = 300
/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
------------------------------------------------------------------
Bra
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = '1'
Last code unit = '0'
Subject length lower bound = 300
/\Q\E/IB
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capture group count = 0
May match empty string
Subject length lower bound = 0
\
0:
/\Q\Ex/IB
------------------------------------------------------------------
Bra
x
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'x'
Subject length lower bound = 1
/ \Q\E/IB
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = ' '
Subject length lower bound = 1
/a\Q\E/IB
------------------------------------------------------------------
Bra
a
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
abc
0: a
bca
0: a
bac
0: a
/a\Q\Eb/IB
------------------------------------------------------------------
Bra
ab
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
abc
0: ab
/\Q\Eabc/IB
------------------------------------------------------------------
Bra
abc
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/x*+\w/IB
------------------------------------------------------------------
Bra
x*+
\w
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Subject length lower bound = 1
\= Expect no match
xxxxx
No match
/x?+/IB
------------------------------------------------------------------
Bra
x?+
Ket
End
------------------------------------------------------------------
Capture group count = 0
May match empty string
Subject length lower bound = 0
/x++/IB
------------------------------------------------------------------
Bra
x++
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'x'
Subject length lower bound = 1
/x{1,3}+/B,no_auto_possess
------------------------------------------------------------------
Bra
x
x{0,2}+
Ket
End
------------------------------------------------------------------
/x{1,3}+/Bi,no_auto_possess
------------------------------------------------------------------
Bra
/i x
/i x{0,2}+
Ket
End
------------------------------------------------------------------
/[^x]{1,3}+/B,no_auto_possess
------------------------------------------------------------------
Bra
[^x]
[^x]{0,2}+
Ket
End
------------------------------------------------------------------
/[^x]{1,3}+/Bi,no_auto_possess
------------------------------------------------------------------
Bra
/i [^x]
/i [^x]{0,2}+
Ket
End
------------------------------------------------------------------
/(x)*+/IB
------------------------------------------------------------------
Bra
Braposzero
CBraPos 1
x
KetRpos
Ket
End
------------------------------------------------------------------
Capture group count = 1
May match empty string
Subject length lower bound = 0
/^(\w++|\s++)*$/I
Capture group count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
now is the time for all good men to come to the aid of the party
0: now is the time for all good men to come to the aid of the party
1: party
\= Expect no match
this is not a line with only words and spaces!
No match
/(\d++)(\w)/I
Capture group count = 2
Starting code units: 0 1 2 3 4 5 6 7 8 9
Subject length lower bound = 2
12345a
0: 12345a
1: 12345
2: a
\= Expect no match
12345+
No match
/a++b/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
/(a++b)/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
1: aaab
/(a++)b/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
1: aaa
/([^()]++|\([^()]*\))+/I
Capture group count = 1
Starting code units: \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 ! " # $ % & ' ( * + , - . / 0 1 2 3 4 5
6 7 8 9 : ; < = > ? @ 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
[ \ ] ^ _ ` 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
Subject length lower bound = 1
((abc(ade)ufh()()x
0: abc(ade)ufh()()x
1: x
/\(([^()]++|\([^()]+\))+\)/I
Capture group count = 1
First code unit = '('
Last code unit = ')'
Subject length lower bound = 3
(abc)
0: (abc)
1: abc
(abc(def)xyz)
0: (abc(def)xyz)
1: xyz
\= Expect no match
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
No match
/(abc){1,3}+/IB
------------------------------------------------------------------
Bra
Once
CBra 1
abc
Ket
Brazero
Bra
CBra 1
abc
Ket
Brazero
CBra 1
abc
Ket
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/a+?+/I
Failed: error 109 at offset 3: quantifier does not follow a repeatable item
/a{2,3}?+b/I
Failed: error 109 at offset 7: quantifier does not follow a repeatable item
/(?U)a+?+/I
Failed: error 109 at offset 7: quantifier does not follow a repeatable item
/a{2,3}?+b/I,ungreedy
Failed: error 109 at offset 7: quantifier does not follow a repeatable item
/x(?U)a++b/IB
------------------------------------------------------------------
Bra
x
a++
b
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'x'
Last code unit = 'b'
Subject length lower bound = 3
xaaaab
0: xaaaab
/(?U)xa++b/IB
------------------------------------------------------------------
Bra
x
a++
b
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'x'
Last code unit = 'b'
Subject length lower bound = 3
xaaaab
0: xaaaab
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/IB
------------------------------------------------------------------
Bra
^
CBra 1
CBra 2
a+
Ket
CBra 3
[ab]+?
Ket
CBra 4
[bc]+
Ket
CBra 5
\w*+
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 5
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
/^x(?U)a+b/IB
------------------------------------------------------------------
Bra
^
x
a++
b
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'x'
Last code unit = 'b'
Subject length lower bound = 3
/^x(?U)(a+)b/IB
------------------------------------------------------------------
Bra
^
x
CBra 1
a+?
Ket
b
Ket
End
------------------------------------------------------------------
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'x'
Last code unit = 'b'
Subject length lower bound = 3
/[.x.]/I
Failed: error 113 at offset 0: POSIX collating elements are not supported
/[=x=]/I
Failed: error 113 at offset 0: POSIX collating elements are not supported
/[:x:]/I
Failed: error 112 at offset 0: POSIX named classes are supported only within a class
/\F/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/\l/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/\L/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/\N{name}/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/\u/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/\U/I
Failed: error 137 at offset 2: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u
/a{1,3}b/ungreedy
ab
0: ab
/[/I
Failed: error 106 at offset 1: missing terminating ] for character class
/[a-/I
Failed: error 106 at offset 3: missing terminating ] for character class
/[[:space:]/I
Failed: error 106 at offset 10: missing terminating ] for character class
/[\s]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/[[:space:]]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/[[:space:]abcde]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d a-e]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 a b c d e
Subject length lower bound = 1
/< (?: (?(R) \d++ | [^<>]*+) | (?R)) * >/Ix
Capture group count = 0
Options: extended
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
<>
0: <>
<abcd>
0: <abcd>
<abc <123> hij>
0: <abc <123> hij>
<abc <def> hij>
0: <def>
<abc<>def>
0: <abc<>def>
<abc<>
0: <>
\= Expect no match
<abc
No match
/8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b/IB
------------------------------------------------------------------
Bra
8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
\b
Ket
End
------------------------------------------------------------------
Capture group count = 0
Max lookbehind = 1
First code unit = '8'
Last code unit = 'X'
Subject length lower bound = 409
/\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b/IB
------------------------------------------------------------------
Bra
$<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
\b
Ket
End
------------------------------------------------------------------
Capture group count = 0
Max lookbehind = 1
First code unit = '$'
Last code unit = 'X'
Subject length lower bound = 404
/(.*)\d+\1/I
Capture group count = 1
Max back reference = 1
Subject length lower bound = 1
/(.*)\d+/I
Capture group count = 1
First code unit at start or follows newline
Subject length lower bound = 1
/(.*)\d+\1/Is
Capture group count = 1
Max back reference = 1
Options: dotall
Subject length lower bound = 1
/(.*)\d+/Is
Capture group count = 1
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 1
/(.*(xyz))\d+\2/I
Capture group count = 2
Max back reference = 2
First code unit at start or follows newline
Last code unit = 'z'
Subject length lower bound = 7
/((.*))\d+\1/I
Capture group count = 2
Max back reference = 1
Subject length lower bound = 1
abc123bc
0: bc123bc
1: bc
2: bc
/a[b]/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(?=a).*/I
Capture group count = 0
May match empty string
First code unit = 'a'
Subject length lower bound = 1
/(?=abc).xyz/Ii
Capture group count = 0
Options: caseless
First code unit = 'a' (caseless)
Last code unit = 'z' (caseless)
Subject length lower bound = 4
/(?=abc)(?i).xyz/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'z' (caseless)
Subject length lower bound = 4
/(?=a)(?=b)/I
Capture group count = 0
May match empty string
First code unit = 'a'
Subject length lower bound = 1
/(?=.)a/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/((?=abcda)a)/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 2
/((?=abcda)ab)/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/()a/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?:(?=.)|(?<!x))a/I
Capture group count = 0
Max lookbehind = 1
First code unit = 'a'
Subject length lower bound = 1
/(?(1)ab|ac)(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Subject length lower bound = 3
/(?(1)abz|acz)(.)/I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 4
/(?(1)abz)(.)/I
Capture group count = 1
Max back reference = 1
Subject length lower bound = 1
/(?(1)abz)(1)23/I
Capture group count = 1
Max back reference = 1
Last code unit = '3'
Subject length lower bound = 3
/(a)+/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/(a){2,3}/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 2
/(a)*/I
Capture group count = 1
May match empty string
Subject length lower bound = 0
/[a]/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/[ab]/I
Capture group count = 0
Starting code units: a b
Subject length lower bound = 1
/[ab]/I
Capture group count = 0
Starting code units: a b
Subject length lower bound = 1
/[^a]/I
Capture group count = 0
Subject length lower bound = 1
/\d456/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = '6'
Subject length lower bound = 4
/\d456/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = '6'
Subject length lower bound = 4
/a^b/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/^a/Im
Capture group count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'a'
Subject length lower bound = 1
abcde
0: a
xy\nabc
0: a
\= Expect no match
xyabc
No match
/c|abc/I
Capture group count = 0
Starting code units: a c
Last code unit = 'c'
Subject length lower bound = 1
/(?i)[ab]/I
Capture group count = 0
Starting code units: A B a b
Subject length lower bound = 1
/[ab](?i)cd/I
Capture group count = 0
Starting code units: a b
Last code unit = 'd' (caseless)
Subject length lower bound = 3
/abc(?C)def/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
abcdef
--->abcdef
0 ^ ^ d
0: abcdef
1234abcdef
--->1234abcdef
0 ^ ^ d
0: abcdef
\= Expect no match
abcxyz
No match
abcxyzf
--->abcxyzf
0 ^ ^ d
No match
/abc(?C)de(?C1)f/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
123abcdef
--->123abcdef
0 ^ ^ d
1 ^ ^ f
0: abcdef
/(?C1)\dabc(?C2)def/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = 'f'
Subject length lower bound = 7
1234abcdef
--->1234abcdef
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
2 ^ ^ d
0: 4abcdef
\= Expect no match
abcdef
No match
/(?C1)\dabc(?C2)def/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = 'f'
Subject length lower bound = 7
1234abcdef
--->1234abcdef
1 ^ \d
1 ^ \d
1 ^ \d
1 ^ \d
2 ^ ^ d
0: 4abcdef
\= Expect no match
abcdef
No match
/(?C255)ab/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(?C256)ab/I
Failed: error 138 at offset 6: number after (?C is greater than 255
/(?Cab)xx/I
Failed: error 182 at offset 3: unrecognized string delimiter follows (?C
/(?C12vr)x/I
Failed: error 139 at offset 5: closing parenthesis for (?C expected
/abc(?C)def/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
\x83\x0\x61bcdef
--->\x83\x00abcdef
0 ^ ^ d
0: abcdef
/(abc)(?C)de(?C1)f/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
123abcdef
--->123abcdef
0 ^ ^ d
1 ^ ^ f
0: abcdef
1: abc
123abcdef\=callout_capture
Callout 0: last capture = 1
1: abc
--->123abcdef
^ ^ d
Callout 1: last capture = 1
1: abc
--->123abcdef
^ ^ f
0: abcdef
1: abc
123abcdefC-\=callout_none
0: abcdef
1: abc
\= Expect no match
123abcdef\=callout_fail=1
--->123abcdef
0 ^ ^ d
1 ^ ^ f
No match
/(?C0)(abc(?C1))*/I
Capture group count = 1
May match empty string
Subject length lower bound = 0
abcabcabc
--->abcabcabc
0 ^ (
1 ^ ^ )*
1 ^ ^ )*
1 ^ ^ )*
0: abcabcabc
1: abc
abcabc\=callout_fail=1:4
--->abcabc
0 ^ (
1 ^ ^ )*
1 ^ ^ )*
0: abcabc
1: abc
abcabcabc\=callout_fail=1:4
--->abcabcabc
0 ^ (
1 ^ ^ )*
1 ^ ^ )*
1 ^ ^ )*
0: abcabc
1: abc
/(\d{3}(?C))*/I
Capture group count = 1
May match empty string
Subject length lower bound = 0
123\=callout_capture
Callout 0: last capture = 0
--->123
^ ^ )*
0: 123
1: 123
123456\=callout_capture
Callout 0: last capture = 0
--->123456
^ ^ )*
Callout 0: last capture = 1
1: 123
--->123456
^ ^ )*
0: 123456
1: 456
123456789\=callout_capture
Callout 0: last capture = 0
--->123456789
^ ^ )*
Callout 0: last capture = 1
1: 123
--->123456789
^ ^ )*
Callout 0: last capture = 1
1: 456
--->123456789
^ ^ )*
0: 123456789
1: 789
/((xyz)(?C)p|(?C1)xyzabc)/I
Capture group count = 2
First code unit = 'x'
Subject length lower bound = 4
xyzabc\=callout_capture
Callout 0: last capture = 2
1: <unset>
2: xyz
--->xyzabc
^ ^ p
Callout 1: last capture = 0
--->xyzabc
^ x
0: xyzabc
1: xyzabc
/(X)((xyz)(?C)p|(?C1)xyzabc)/I
Capture group count = 3
First code unit = 'X'
Last code unit = 'x'
Subject length lower bound = 5
Xxyzabc\=callout_capture
Callout 0: last capture = 3
1: X
2: <unset>
3: xyz
--->Xxyzabc
^ ^ p
Callout 1: last capture = 1
1: X
--->Xxyzabc
^^ x
0: Xxyzabc
1: X
2: xyzabc
/(?=(abc))(?C)abcdef/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
abcdef\=callout_capture
Callout 0: last capture = 1
1: abc
--->abcdef
^ a
0: abcdef
1: abc
/(?!(abc)(?C1)d)(?C2)abcxyz/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 6
abcxyz\=callout_capture
Callout 1: last capture = 1
1: abc
--->abcxyz
^ ^ d
Callout 2: last capture = 0
--->abcxyz
^ a
0: abcxyz
/(?<=(abc)(?C))xyz/I
Capture group count = 1
Max lookbehind = 3
First code unit = 'x'
Last code unit = 'z'
Subject length lower bound = 3
abcxyz\=callout_capture
Callout 0: last capture = 1
1: abc
--->abcxyz
^ )
0: xyz
1: abc
/a(b+)(c*)(?C1)/I
Capture group count = 2
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
\= Expect no match
abbbbbccc\=callout_data=1
--->abbbbbccc
1 ^ ^ End of pattern
Callout data = 1
No match
/a(b+?)(c*?)(?C1)/I
Capture group count = 2
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
\= Expect no match
abbbbbccc\=callout_data=1
--->abbbbbccc
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
1 ^ ^ End of pattern
Callout data = 1
No match
/(?C)abc/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/(?C)^abc/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
/(?C)a|b/I
Capture group count = 0
Starting code units: a b
Subject length lower bound = 1
/a|(b)(?C)/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 1
b
--->b
0 ^^ End of pattern
0: b
1: b
/x(ab|(bc|(de|(?R))))/I
Capture group count = 3
First code unit = 'x'
Subject length lower bound = 3
xab
0: xab
1: ab
xbc
0: xbc
1: bc
2: bc
xde
0: xde
1: de
2: de
3: de
xxab
0: xxab
1: xab
2: xab
3: xab
xxxab
0: xxxab
1: xxab
2: xxab
3: xxab
\= Expect no match
xyab
No match
/^([^()]|\((?1)*\))*$/I
Capture group count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
abc
0: abc
1: c
a(b)c
0: a(b)c
1: c
a(b(c))d
0: a(b(c))d
1: d
\= Expect no match)
a(b(c)d
No match
/^>abc>([^()]|\((?1)*\))*<xyz<$/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = '>'
Last code unit = '<'
Subject length lower bound = 10
>abc>123<xyz<
0: >abc>123<xyz<
1: 3
>abc>1(2)3<xyz<
0: >abc>1(2)3<xyz<
1: 3
>abc>(1(2)3)<xyz<
0: >abc>(1(2)3)<xyz<
1: (1(2)3)
/(a(?1)b)/IB
------------------------------------------------------------------
Bra
CBra 1
a
Recurse
b
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(a(?1)+b)/IB
------------------------------------------------------------------
Bra
CBra 1
a
SBra
Recurse
KetRmax
b
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
Starting code units: ( - 0 1 2 3 4 5 6 7 8 9
Subject length lower bound = 1
12
0: 12
1: 12
(((2+2)*-3)-7)
0: (((2+2)*-3)-7)
1: (((2+2)*-3)-7)
2: -
-12
0: -12
1: -12
\= Expect no match
((2+2)*-3)-7)
No match
/^(x(y|(?1){2})z)/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
First code unit = 'x'
Subject length lower bound = 3
xyz
0: xyz
1: xyz
2: y
xxyzxyzz
0: xxyzxyzz
1: xxyzxyzz
2: xyzxyz
\= Expect no match
xxyzz
No match
xxyzxyzxyzz
No match
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/Ix
Capture group count = 2
Options: extended
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
<>
0: <>
1: <>
2: <>
<abcd>
0: <abcd>
1: <abcd>
2: <abcd>
<abc <123> hij>
0: <abc <123> hij>
1: <abc <123> hij>
2: <abc <123> hij>
<abc <def> hij>
0: <def>
1: <def>
2: <def>
<abc<>def>
0: <abc<>def>
1: <abc<>def>
2: <abc<>def>
<abc<>
0: <>
1: <>
2: <>
\= Expect no match
<abc
No match
/(?1)/I
Failed: error 115 at offset 3: reference to non-existent subpattern
/((?2)(abc)/I
Failed: error 114 at offset 10: missing closing parenthesis
/^(abc)def(?1)/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 9
abcdefabc
0: abcdefabc
1: abc
/^(a|b|c)=(?1)+/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
Starting code units: a b c
Subject length lower bound = 2
a=a
0: a=a
1: a
a=b
0: a=b
1: a
a=bc
0: a=bc
1: a
/^(a|b|c)=((?1))+/I
Capture group count = 2
Compile options: <none>
Overall options: anchored
Starting code units: a b c
Subject length lower bound = 2
a=a
0: a=a
1: a
2: a
a=b
0: a=b
1: a
2: b
a=bc
0: a=bc
1: a
2: c
/a(?P<name1>b|c)d(?P<longername2>e)/IB
------------------------------------------------------------------
Bra
a
CBra 1
b
Alt
c
Ket
d
CBra 2
e
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 2
Named capture groups:
longername2 2
name1 1
First code unit = 'a'
Last code unit = 'e'
Subject length lower bound = 4
abde
0: abde
1: b
2: e
acde
0: acde
1: c
2: e
/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/IB
------------------------------------------------------------------
Bra
Bra
a
CBra 1
c
CBra 2
d
Ket
Ket
Ket
CBra 3
a
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 3
Named capture groups:
a 3
c 1
d 2
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 4
/(?P<a>a)...(?P=a)bbb(?P>a)d/IB
------------------------------------------------------------------
Bra
CBra 1
a
Ket
Any
Any
Any
\1
bbb
Recurse
d
Ket
End
------------------------------------------------------------------
Capture group count = 1
Max back reference = 1
Named capture groups:
a 1
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 10
/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/Ii
Capture group count = 4
Max back reference = 4
Named capture groups:
four 4
one 1
three 3
two 2
May match empty string
Compile options: caseless
Overall options: anchored caseless
Subject length lower bound = 0
1221
0: 1221
1: 1221
2: 1
Satan, oscillate my metallic sonatas!
0: Satan, oscillate my metallic sonatas!
1: <unset>
2: <unset>
3: Satan, oscillate my metallic sonatas
4: S
A man, a plan, a canal: Panama!
0: A man, a plan, a canal: Panama!
1: <unset>
2: <unset>
3: A man, a plan, a canal: Panama
4: A
Able was I ere I saw Elba.
0: Able was I ere I saw Elba.
1: <unset>
2: <unset>
3: Able was I ere I saw Elba
4: A
\= Expect no match
The quick brown fox
No match
/((?(R)a|b))\1(?1)?/I
Capture group count = 1
Max back reference = 1
Subject length lower bound = 2
bb
0: bb
1: b
bbaa
0: bba
1: b
/(.*)a/Is
Capture group count = 1
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'a'
Subject length lower bound = 1
/(.*)a\1/Is
Capture group count = 1
Max back reference = 1
Options: dotall
Last code unit = 'a'
Subject length lower bound = 1
/(.*)a(b)\2/Is
Capture group count = 2
Max back reference = 2
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'b'
Subject length lower bound = 3
/((.*)a|(.*)b)z/Is
Capture group count = 3
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|(.*)b)z\1/Is
Capture group count = 3
Max back reference = 1
Options: dotall
Last code unit = 'z'
Subject length lower bound = 3
/((.*)a|(.*)b)z\2/Is
Capture group count = 3
Max back reference = 2
Options: dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|(.*)b)z\3/Is
Capture group count = 3
Max back reference = 3
Options: dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|^(.*)b)z\3/Is
Capture group count = 3
Max back reference = 3
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'z'
Subject length lower bound = 2
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/Is
Capture group count = 31
May match empty string
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 0
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/Is
Capture group count = 31
Max back reference = 31
May match empty string
Options: dotall
Subject length lower bound = 0
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/Is
Capture group count = 32
Max back reference = 32
May match empty string
Options: dotall
Subject length lower bound = 0
/(a)(bc)/IB,no_auto_capture
------------------------------------------------------------------
Bra
Bra
a
Ket
Bra
bc
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: no_auto_capture
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
/(?P<one>a)(bc)/IB,no_auto_capture
------------------------------------------------------------------
Bra
CBra 1
a
Ket
Bra
bc
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
Named capture groups:
one 1
Options: no_auto_capture
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
1: a
/(a)(?P<named>bc)/IB,no_auto_capture
------------------------------------------------------------------
Bra
Bra
a
Ket
CBra 1
bc
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
Named capture groups:
named 1
Options: no_auto_capture
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/(aaa(?C1)bbb|ab)/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaabbb
--->aaabbb
1 ^ ^ b
0: aaabbb
1: aaabbb
aaabbb\=callout_data=0
--->aaabbb
1 ^ ^ b
0: aaabbb
1: aaabbb
aaabbb\=callout_data=1
--->aaabbb
1 ^ ^ b
Callout data = 1
0: ab
1: ab
\= Expect no match
aaabbb\=callout_data=-1
--->aaabbb
1 ^ ^ b
Callout data = -1
No match
/ab(?P<one>cd)ef(?P<two>gh)/I
Capture group count = 2
Named capture groups:
one 1
two 2
First code unit = 'a'
Last code unit = 'h'
Subject length lower bound = 8
abcdefgh
0: abcdefgh
1: cd
2: gh
abcdefgh\=copy=1,get=two
0: abcdefgh
1: cd
2: gh
1C cd (2)
G gh (2) two (group 2)
abcdefgh\=copy=one,copy=two
0: abcdefgh
1: cd
2: gh
C cd (2) one (group 1)
C gh (2) two (group 2)
abcdefgh\=copy=three
0: abcdefgh
1: cd
2: gh
Number not found for group 'three'
Copy substring 'three' failed (-49): unknown substring
/(?P<Tes>)(?P<Test>)/IB
------------------------------------------------------------------
Bra
CBra 1
Ket
CBra 2
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 2
Named capture groups:
Tes 1
Test 2
May match empty string
Subject length lower bound = 0
/(?P<Test>)(?P<Tes>)/IB
------------------------------------------------------------------
Bra
CBra 1
Ket
CBra 2
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 2
Named capture groups:
Tes 2
Test 1
May match empty string
Subject length lower bound = 0
/(?P<Z>zz)(?P<A>aa)/I
Capture group count = 2
Named capture groups:
A 2
Z 1
First code unit = 'z'
Last code unit = 'a'
Subject length lower bound = 4
zzaa\=copy=Z
0: zzaa
1: zz
2: aa
C zz (2) Z (group 1)
zzaa\=copy=A
0: zzaa
1: zz
2: aa
C aa (2) A (group 2)
/(?P<x>eks)(?P<x>eccs)/I
Failed: error 143 at offset 16: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/I
Failed: error 143 at offset 31: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
"\[((?P<elem>\d+)(,(?P>elem))*)\]"I
Capture group count = 3
Named capture groups:
elem 2
First code unit = '['
Last code unit = ']'
Subject length lower bound = 3
[10,20,30,5,5,4,4,2,43,23,4234]
0: [10,20,30,5,5,4,4,2,43,23,4234]
1: 10,20,30,5,5,4,4,2,43,23,4234
2: 10
3: ,4234
\= Expect no match
[]
No match
"\[((?P<elem>\d+)(,(?P>elem))*)?\]"I
Capture group count = 3
Named capture groups:
elem 2
First code unit = '['
Last code unit = ']'
Subject length lower bound = 2
[10,20,30,5,5,4,4,2,43,23,4234]
0: [10,20,30,5,5,4,4,2,43,23,4234]
1: 10,20,30,5,5,4,4,2,43,23,4234
2: 10
3: ,4234
[]
0: []
/(a(b(?2)c))?/IB
------------------------------------------------------------------
Bra
Brazero
CBra 1
a
CBra 2
b
Recurse
c
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 2
May match empty string
Subject length lower bound = 0
/(a(b(?2)c))*/IB
------------------------------------------------------------------
Bra
Brazero
CBra 1
a
CBra 2
b
Recurse
c
Ket
KetRmax
Ket
End
------------------------------------------------------------------
Capture group count = 2
May match empty string
Subject length lower bound = 0
/(a(b(?2)c)){0,2}/IB
------------------------------------------------------------------
Bra
Brazero
Bra
CBra 1
a
CBra 2
b
Recurse
c
Ket
Ket
Brazero
CBra 1
a
CBra 2
b
Recurse
c
Ket
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 2
May match empty string
Subject length lower bound = 0
/[ab]{1}+/B
------------------------------------------------------------------
Bra
[ab]
Ket
End
------------------------------------------------------------------
/()(?1){1}/B
------------------------------------------------------------------
Bra
CBra 1
Ket
Recurse
Ket
End
------------------------------------------------------------------
/()(?1)/B
------------------------------------------------------------------
Bra
CBra 1
Ket
Recurse
Ket
End
------------------------------------------------------------------
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Capture group count = 3
Options: caseless
Last code unit = 'g' (caseless)
Subject length lower bound = 8
Baby Bjorn Active Carrier - With free SHIPPING!!
0: Baby Bjorn Active Carrier - With free SHIPPING!!
1: Baby Bjorn Active Carrier - With free SHIPPING!!
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Capture group count = 3
Options: caseless
Last code unit = 'g' (caseless)
Subject length lower bound = 8
Baby Bjorn Active Carrier - With free SHIPPING!!
0: Baby Bjorn Active Carrier - With free SHIPPING!!
1: Baby Bjorn Active Carrier - With free SHIPPING!!
/a*.*b/IB
------------------------------------------------------------------
Bra
a*
Any*
b
Ket
End
------------------------------------------------------------------
Capture group count = 0
Last code unit = 'b'
Subject length lower bound = 1
/(a|b)*.?c/IB
------------------------------------------------------------------
Bra
Brazero
CBra 1
a
Alt
b
KetRmax
Any?
c
Ket
End
------------------------------------------------------------------
Capture group count = 1
Last code unit = 'c'
Subject length lower bound = 1
/abc(?C255)de(?C)f/IB
------------------------------------------------------------------
Bra
abc
Callout 255 10 1
de
Callout 0 16 1
f
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
/abcde/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
a
Callout 255 1 1
b
Callout 255 2 1
c
Callout 255 3 1
d
Callout 255 4 1
e
Callout 255 5 0
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: auto_callout
First code unit = 'a'
Last code unit = 'e'
Subject length lower bound = 5
abcde
--->abcde
+0 ^ a
+1 ^^ b
+2 ^ ^ c
+3 ^ ^ d
+4 ^ ^ e
+5 ^ ^ End of pattern
0: abcde
\= Expect no match
abcdfe
--->abcdfe
+0 ^ a
+1 ^^ b
+2 ^ ^ c
+3 ^ ^ d
+4 ^ ^ e
No match
/a*b/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 2
a*+
Callout 255 2 1
b
Callout 255 3 0
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: auto_callout
Starting code units: a b
Last code unit = 'b'
Subject length lower bound = 1
ab
--->ab
+0 ^ a*
+2 ^^ b
+3 ^ ^ End of pattern
0: ab
aaaab
--->aaaab
+0 ^ a*
+2 ^ ^ b
+3 ^ ^ End of pattern
0: aaaab
aaaacb
--->aaaacb
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^^ b
+0 ^ a*
+2 ^ b
+3 ^^ End of pattern
0: b
/a*b/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 2
a*+
Callout 255 2 1
b
Callout 255 3 0
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: auto_callout
Starting code units: a b
Last code unit = 'b'
Subject length lower bound = 1
ab
--->ab
+0 ^ a*
+2 ^^ b
+3 ^ ^ End of pattern
0: ab
aaaab
--->aaaab
+0 ^ a*
+2 ^ ^ b
+3 ^ ^ End of pattern
0: aaaab
aaaacb
--->aaaacb
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^ ^ b
+0 ^ a*
+2 ^^ b
+0 ^ a*
+2 ^ b
+3 ^^ End of pattern
0: b
/a+b/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 2
a++
Callout 255 2 1
b
Callout 255 3 0
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: auto_callout
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
ab
--->ab
+0 ^ a+
+2 ^^ b
+3 ^ ^ End of pattern
0: ab
aaaab
--->aaaab
+0 ^ a+
+2 ^ ^ b
+3 ^ ^ End of pattern
0: aaaab
\= Expect no match
aaaacb
--->aaaacb
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^ ^ b
+0 ^ a+
+2 ^^ b
No match
/(abc|def)x/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
CBra 1
Callout 255 1 1
a
Callout 255 2 1
b
Callout 255 3 1
c
Callout 255 4 1
Alt
Callout 255 5 1
d
Callout 255 6 1
e
Callout 255 7 1
f
Callout 255 8 1
Ket
Callout 255 9 1
x
Callout 255 10 0
Ket
End
------------------------------------------------------------------
Capture group count = 1
Options: auto_callout
Starting code units: a d
Last code unit = 'x'
Subject length lower bound = 4
abcx
--->abcx
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+10 ^ ^ End of pattern
0: abcx
1: abc
defx
--->defx
+0 ^ (
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+10 ^ ^ End of pattern
0: defx
1: def
\= Expect no match
abcdefzx
--->abcdefzx
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+5 ^ d
+0 ^ (
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
No match
/(abc|def)x/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
CBra 1
Callout 255 1 1
a
Callout 255 2 1
b
Callout 255 3 1
c
Callout 255 4 1
Alt
Callout 255 5 1
d
Callout 255 6 1
e
Callout 255 7 1
f
Callout 255 8 1
Ket
Callout 255 9 1
x
Callout 255 10 0
Ket
End
------------------------------------------------------------------
Capture group count = 1
Options: auto_callout
Starting code units: a d
Last code unit = 'x'
Subject length lower bound = 4
abcx
--->abcx
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+10 ^ ^ End of pattern
0: abcx
1: abc
defx
--->defx
+0 ^ (
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+10 ^ ^ End of pattern
0: defx
1: def
\= Expect no match
abcdefzx
--->abcdefzx
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+5 ^ d
+0 ^ (
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
No match
/(ab|cd){3,4}/I,auto_callout
Capture group count = 1
Options: auto_callout
Starting code units: a c
Subject length lower bound = 6
ababab
--->ababab
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+12 ^ ^ End of pattern
0: ababab
1: ab
abcdabcd
--->abcdabcd
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ ){3,4}
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ ){3,4}
+12 ^ ^ End of pattern
0: abcdabcd
1: cd
abcdcdcdcdcd
--->abcdcdcdcdcd
+0 ^ (
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ ){3,4}
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ ){3,4}
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ ){3,4}
+12 ^ ^ End of pattern
0: abcdcdcd
1: cd
/([ab]{,4}c|xy)/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
CBra 1
Callout 255 1 4
[ab]
Callout 255 5 1
{
Callout 255 6 1
,
Callout 255 7 1
4
Callout 255 8 1
}
Callout 255 9 1
c
Callout 255 10 1
Alt
Callout 255 11 1
x
Callout 255 12 1
y
Callout 255 13 1
Ket
Callout 255 14 0
Ket
End
------------------------------------------------------------------
Capture group count = 1
Options: auto_callout
Starting code units: a b x
Subject length lower bound = 2
\= Expect no match
Note: that { does NOT introduce a quantifier
--->Note: that { does NOT introduce a quantifier
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
No match
/([ab]{,4}c|xy)/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
CBra 1
Callout 255 1 4
[ab]
Callout 255 5 1
{
Callout 255 6 1
,
Callout 255 7 1
4
Callout 255 8 1
}
Callout 255 9 1
c
Callout 255 10 1
Alt
Callout 255 11 1
x
Callout 255 12 1
y
Callout 255 13 1
Ket
Callout 255 14 0
Ket
End
------------------------------------------------------------------
Capture group count = 1
Options: auto_callout
Starting code units: a b x
Subject length lower bound = 2
\= Expect no match
Note: that { does NOT introduce a quantifier
--->Note: that { does NOT introduce a quantifier
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ (
+1 ^ [ab]
+5 ^^ {
+11 ^ x
No match
/([ab]{1,4}c|xy){4,5}?123/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 1
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 7
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 1
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 7
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 1
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 7
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 1
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 7
Ket
Braminzero
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 1
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 7
Ket
Callout 255 21 1
1
Callout 255 22 1
2
Callout 255 23 1
3
Callout 255 24 0
Ket
End
------------------------------------------------------------------
Capture group count = 1
Options: auto_callout
Starting code units: a b x
Last code unit = '3'
Subject length lower bound = 11
aacaacaacaacaac123
--->aacaacaacaacaac123
+0 ^ (
+1 ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+21 ^ ^ 1
+1 ^ ^ [ab]{1,4}
+10 ^ ^ c
+11 ^ ^ |
+21 ^ ^ 1
+22 ^ ^ 2
+23 ^ ^ 3
+24 ^ ^ End of pattern
0: aacaacaacaacaac123
1: aac
/\b.*/I
Capture group count = 0
Max lookbehind = 1
May match empty string
Subject length lower bound = 0
ab cd\=offset=1
0: cd
/\b.*/Is
Capture group count = 0
Max lookbehind = 1
May match empty string
Options: dotall
Subject length lower bound = 0
ab cd\=startoffset=1
0: cd
/(?!.bcd).*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
Xbcd12345
0: bcd12345
/abcde/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'e'
Subject length lower bound = 5
ab\=ps
Partial match: ab
abc\=ps
Partial match: abc
abcd\=ps
Partial match: abcd
abcde\=ps
0: abcde
the quick brown abc\=ps
Partial match: abc
\= Expect no match\=ps
the quick brown abxyz fox\=ps
No match
"^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/(20)?\d\d$"I
Capture group count = 3
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = '/'
Subject length lower bound = 6
13/05/04\=ps
0: 13/05/04
1: 13
2: 05
13/5/2004\=ps
0: 13/5/2004
1: 13
2: 5
3: 20
02/05/09\=ps
0: 02/05/09
1: 02
2: 05
1\=ps
Partial match: 1
1/2\=ps
Partial match: 1/2
1/2/0\=ps
Partial match: 1/2/0
1/2/04\=ps
0: 1/2/04
1: 1
2: 2
0\=ps
Partial match: 0
02/\=ps
Partial match: 02/
02/0\=ps
Partial match: 02/0
02/1\=ps
Partial match: 02/1
\= Expect no match\=ps
\=ps
No match
123\=ps
No match
33/4/04\=ps
No match
3/13/04\=ps
No match
0/1/2003\=ps
No match
0/\=ps
No match
02/0/\=ps
No match
02/13\=ps
No match
/0{0,2}ABC/I
Capture group count = 0
Starting code units: 0 A
Last code unit = 'C'
Subject length lower bound = 3
/\d{3,}ABC/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = 'C'
Subject length lower bound = 6
/\d*ABC/I
Capture group count = 0
Starting code units: 0 1 2 3 4 5 6 7 8 9 A
Last code unit = 'C'
Subject length lower bound = 3
/[abc]+DE/I
Capture group count = 0
Starting code units: a b c
Last code unit = 'E'
Subject length lower bound = 3
/[abc]?123/I
Capture group count = 0
Starting code units: 1 a b c
Last code unit = '3'
Subject length lower bound = 3
123\=ps
0: 123
a\=ps
Partial match: a
b\=ps
Partial match: b
c\=ps
Partial match: c
c12\=ps
Partial match: c12
c123\=ps
0: c123
/^(?:\d){3,5}X/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = 'X'
Subject length lower bound = 4
1\=ps
Partial match: 1
123\=ps
Partial match: 123
123X
0: 123X
1234\=ps
Partial match: 1234
1234X
0: 1234X
12345\=ps
Partial match: 12345
12345X
0: 12345X
\= Expect no match
1X
No match
123456\=ps
No match
"<(\w+)/?>(.)*</(\1)>"Igms
Capture group count = 3
Max back reference = 1
Options: dotall multiline
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 7
<!DOCTYPE seite SYSTEM "http://www.lco.lineas.de/xmlCms.dtd">\n<seite>\n<dokumenteninformation>\n<seitentitel>Partner der LCO</seitentitel>\n<sprache>de</sprache>\n<seitenbeschreibung>Partner der LINEAS Consulting\nGmbH</seitenbeschreibung>\n<schluesselworte>LINEAS Consulting GmbH Hamburg\nPartnerfirmen</schluesselworte>\n<revisit>30 days</revisit>\n<robots>index,follow</robots>\n<menueinformation>\n<aktiv>ja</aktiv>\n<menueposition>3</menueposition>\n<menuetext>Partner</menuetext>\n</menueinformation>\n<lastedited>\n<autor>LCO</autor>\n<firma>LINEAS Consulting</firma>\n<datum>15.10.2003</datum>\n</lastedited>\n</dokumenteninformation>\n<inhalt>\n\n<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\nGmbH</absatzueberschrift>\n\n<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\n<bild name="logo_ca.gif" rahmen="no"/></link> <link\nziel="http://www.ey.com/" zielfenster="_blank"><bild\nname="logo_euy.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\n<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\n\n<absatz><link ziel="http://www.atelion.de/"\nzielfenster="_blank"><bild\nname="logo_atelion.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><link ziel="http://www.line-information.de/"\nzielfenster="_blank">\n<bild name="logo_line_information.gif" rahmen="no"/></link>\n</absatz>\n\n<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\n\n<absatz><link ziel="http://www.incognis.de/"\nzielfenster="_blank"><bild\nname="logo_incognis.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.addcraft.com/"\nzielfenster="_blank"><bild\nname="logo_addcraft.gif" rahmen="no"/></link></absatz>\n\n<absatz><link ziel="http://www.comendo.com/"\nzielfenster="_blank"><bild\nname="logo_comendo.gif" rahmen="no"/></link></absatz>\n\n</inhalt>\n</seite>\=jitstack=1024
0: <seite>\x0a<dokumenteninformation>\x0a<seitentitel>Partner der LCO</seitentitel>\x0a<sprache>de</sprache>\x0a<seitenbeschreibung>Partner der LINEAS Consulting\x0aGmbH</seitenbeschreibung>\x0a<schluesselworte>LINEAS Consulting GmbH Hamburg\x0aPartnerfirmen</schluesselworte>\x0a<revisit>30 days</revisit>\x0a<robots>index,follow</robots>\x0a<menueinformation>\x0a<aktiv>ja</aktiv>\x0a<menueposition>3</menueposition>\x0a<menuetext>Partner</menuetext>\x0a</menueinformation>\x0a<lastedited>\x0a<autor>LCO</autor>\x0a<firma>LINEAS Consulting</firma>\x0a<datum>15.10.2003</datum>\x0a</lastedited>\x0a</dokumenteninformation>\x0a<inhalt>\x0a\x0a<absatzueberschrift>Die Partnerfirmen der LINEAS Consulting\x0aGmbH</absatzueberschrift>\x0a\x0a<absatz><link ziel="http://www.ca.com/" zielfenster="_blank">\x0a<bild name="logo_ca.gif" rahmen="no"/></link> <link\x0aziel="http://www.ey.com/" zielfenster="_blank"><bild\x0aname="logo_euy.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.cisco.de/" zielfenster="_blank">\x0a<bild name="logo_cisco.gif" rahmen="ja"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.atelion.de/"\x0azielfenster="_blank"><bild\x0aname="logo_atelion.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><link ziel="http://www.line-information.de/"\x0azielfenster="_blank">\x0a<bild name="logo_line_information.gif" rahmen="no"/></link>\x0a</absatz>\x0a\x0a<absatz><bild name="logo_aw.gif" rahmen="no"/></absatz>\x0a\x0a<absatz><link ziel="http://www.incognis.de/"\x0azielfenster="_blank"><bild\x0aname="logo_incognis.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.addcraft.com/"\x0azielfenster="_blank"><bild\x0aname="logo_addcraft.gif" rahmen="no"/></link></absatz>\x0a\x0a<absatz><link ziel="http://www.comendo.com/"\x0azielfenster="_blank"><bild\x0aname="logo_comendo.gif" rahmen="no"/></link></absatz>\x0a\x0a</inhalt>\x0a</seite>
1: seite
2: \x0a
3: seite
/line\nbreak/I
Capture group count = 0
Contains explicit CR or LF match
First code unit = 'l'
Last code unit = 'k'
Subject length lower bound = 10
this is a line\nbreak
0: line\x0abreak
line one\nthis is a line\nbreak in the second line
0: line\x0abreak
/line\nbreak/I,firstline
Capture group count = 0
Contains explicit CR or LF match
Options: firstline
First code unit = 'l'
Last code unit = 'k'
Subject length lower bound = 10
this is a line\nbreak
0: line\x0abreak
\= Expect no match
line one\nthis is a line\nbreak in the second line
No match
/line\nbreak/Im,firstline
Capture group count = 0
Contains explicit CR or LF match
Options: firstline multiline
First code unit = 'l'
Last code unit = 'k'
Subject length lower bound = 10
this is a line\nbreak
0: line\x0abreak
\= Expect no match
line one\nthis is a line\nbreak in the second line
No match
/(?i)(?-i)AbCd/I
Capture group count = 0
First code unit = 'A'
Last code unit = 'd'
Subject length lower bound = 4
AbCd
0: AbCd
\= Expect no match
abcd
No match
/a{11111111111111111111}/I
Failed: error 105 at offset 8: number too big in {} quantifier
/(){64294967295}/I
Failed: error 105 at offset 9: number too big in {} quantifier
/(){2,4294967295}/I
Failed: error 105 at offset 11: number too big in {} quantifier
"(?i:a)(?i:b)(?i:c)(?i:d)(?i:e)(?i:f)(?i:g)(?i:h)(?i:i)(?i:j)(k)(?i:l)A\1B"I
Capture group count = 1
Max back reference = 1
First code unit = 'a' (caseless)
Last code unit = 'B'
Subject length lower bound = 15
abcdefghijklAkB
0: abcdefghijklAkB
1: k
"(?P<n0>a)(?P<n1>b)(?P<n2>c)(?P<n3>d)(?P<n4>e)(?P<n5>f)(?P<n6>g)(?P<n7>h)(?P<n8>i)(?P<n9>j)(?P<n10>k)(?P<n11>l)A\11B"I
Capture group count = 12
Max back reference = 11
Named capture groups:
n0 1
n1 2
n10 11
n11 12
n2 3
n3 4
n4 5
n5 6
n6 7
n7 8
n8 9
n9 10
First code unit = 'a'
Last code unit = 'B'
Subject length lower bound = 15
abcdefghijklAkB
0: abcdefghijklAkB
1: a
2: b
3: c
4: d
5: e
6: f
7: g
8: h
9: i
10: j
11: k
12: l
"(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)A\11B"I
Capture group count = 12
Max back reference = 11
First code unit = 'a'
Last code unit = 'B'
Subject length lower bound = 15
abcdefghijklAkB
0: abcdefghijklAkB
1: a
2: b
3: c
4: d
5: e
6: f
7: g
8: h
9: i
10: j
11: k
12: l
"(?P<name0>a)(?P<name1>a)(?P<name2>a)(?P<name3>a)(?P<name4>a)(?P<name5>a)(?P<name6>a)(?P<name7>a)(?P<name8>a)(?P<name9>a)(?P<name10>a)(?P<name11>a)(?P<name12>a)(?P<name13>a)(?P<name14>a)(?P<name15>a)(?P<name16>a)(?P<name17>a)(?P<name18>a)(?P<name19>a)(?P<name20>a)(?P<name21>a)(?P<name22>a)(?P<name23>a)(?P<name24>a)(?P<name25>a)(?P<name26>a)(?P<name27>a)(?P<name28>a)(?P<name29>a)(?P<name30>a)(?P<name31>a)(?P<name32>a)(?P<name33>a)(?P<name34>a)(?P<name35>a)(?P<name36>a)(?P<name37>a)(?P<name38>a)(?P<name39>a)(?P<name40>a)(?P<name41>a)(?P<name42>a)(?P<name43>a)(?P<name44>a)(?P<name45>a)(?P<name46>a)(?P<name47>a)(?P<name48>a)(?P<name49>a)(?P<name50>a)(?P<name51>a)(?P<name52>a)(?P<name53>a)(?P<name54>a)(?P<name55>a)(?P<name56>a)(?P<name57>a)(?P<name58>a)(?P<name59>a)(?P<name60>a)(?P<name61>a)(?P<name62>a)(?P<name63>a)(?P<name64>a)(?P<name65>a)(?P<name66>a)(?P<name67>a)(?P<name68>a)(?P<name69>a)(?P<name70>a)(?P<name71>a)(?P<name72>a)(?P<name73>a)(?P<name74>a)(?P<name75>a)(?P<name76>a)(?P<name77>a)(?P<name78>a)(?P<name79>a)(?P<name80>a)(?P<name81>a)(?P<name82>a)(?P<name83>a)(?P<name84>a)(?P<name85>a)(?P<name86>a)(?P<name87>a)(?P<name88>a)(?P<name89>a)(?P<name90>a)(?P<name91>a)(?P<name92>a)(?P<name93>a)(?P<name94>a)(?P<name95>a)(?P<name96>a)(?P<name97>a)(?P<name98>a)(?P<name99>a)(?P<name100>a)"I
Capture group count = 101
Named capture groups:
name0 1
name1 2
name10 11
name100 101
name11 12
name12 13
name13 14
name14 15
name15 16
name16 17
name17 18
name18 19
name19 20
name2 3
name20 21
name21 22
name22 23
name23 24
name24 25
name25 26
name26 27
name27 28
name28 29
name29 30
name3 4
name30 31
name31 32
name32 33
name33 34
name34 35
name35 36
name36 37
name37 38
name38 39
name39 40
name4 5
name40 41
name41 42
name42 43
name43 44
name44 45
name45 46
name46 47
name47 48
name48 49
name49 50
name5 6
name50 51
name51 52
name52 53
name53 54
name54 55
name55 56
name56 57
name57 58
name58 59
name59 60
name6 7
name60 61
name61 62
name62 63
name63 64
name64 65
name65 66
name66 67
name67 68
name68 69
name69 70
name7 8
name70 71
name71 72
name72 73
name73 74
name74 75
name75 76
name76 77
name77 78
name78 79
name79 80
name8 9
name80 81
name81 82
name82 83
name83 84
name84 85
name85 86
name86 87
name87 88
name88 89
name89 90
name9 10
name90 91
name91 92
name92 93
name93 94
name94 95
name95 96
name96 97
name97 98
name98 99
name99 100
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 101
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Matched, but too many substrings
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
"(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)(a)"I
Capture group count = 101
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 101
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Matched, but too many substrings
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
/[^()]*(?:\((?R)\)[^()]*)*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0: (this(and)that)
(this(and)that)stuff
0: (this(and)that)stuff
/[^()]*(?:\((?>(?R))\)[^()]*)*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/[^()]*(?:\((?R)\))*[^()]*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/(?:\((?R)\))*[^()]*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0:
((this))
0: ((this))
/(?:\((?R)\))|[^()]*/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0:
(this)
0: (this)
((this))
0: ((this))
/\x{0000ff}/I
Capture group count = 0
First code unit = \xff
Subject length lower bound = 1
/^((?P<A>a1)|(?P<A>a2)b)/I
Failed: error 143 at offset 18: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
Capture group count = 3
Named capture groups:
A 2
A 3
Compile options: dupnames
Overall options: anchored dupnames
First code unit = 'a'
Subject length lower bound = 2
a1b\=copy=A
0: a1
1: a1
2: a1
C a1 (2) A (non-unique)
a2b\=copy=A
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A (non-unique)
a1b\=copy=Z,copy=A
0: a1
1: a1
2: a1
Number not found for group 'Z'
Copy substring 'Z' failed (-49): unknown substring
C a1 (2) A (non-unique)
/(?|(?<a>)(?<b>)(?<a>)|(?<a>)(?<b>)(?<a>))/I,dupnames
Capture group count = 3
Named capture groups:
a 1
a 3
b 2
May match empty string
Options: dupnames
Subject length lower bound = 0
/^(?P<A>a)(?P<A>b)/I,dupnames
Capture group count = 2
Named capture groups:
A 1
A 2
Compile options: dupnames
Overall options: anchored dupnames
First code unit = 'a'
Subject length lower bound = 2
ab\=copy=A
0: ab
1: a
2: b
C a (1) A (non-unique)
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
Capture group count = 2
Named capture groups:
A 1
A 2
Options: dupnames
Starting code units: a c
Subject length lower bound = 2
ab\=copy=A
0: ab
1: a
2: b
C a (1) A (non-unique)
cd\=copy=A
0: cd
Copy substring 'A' failed (-55): requested value is not set
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
Capture group count = 4
Named capture groups:
A 1
A 2
A 3
A 4
Options: dupnames
Starting code units: a c
Subject length lower bound = 2
cdefgh\=copy=A
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
C ef (2) A (non-unique)
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
Capture group count = 3
Named capture groups:
A 2
A 3
Compile options: dupnames
Overall options: anchored dupnames
First code unit = 'a'
Subject length lower bound = 2
a1b\=get=A
0: a1
1: a1
2: a1
G a1 (2) A (non-unique)
a2b\=get=A
0: a2b
1: a2b
2: <unset>
3: a2
G a2 (2) A (non-unique)
a1b\=get=Z,get=A
0: a1
1: a1
2: a1
Number not found for group 'Z'
Get substring 'Z' failed (-49): unknown substring
G a1 (2) A (non-unique)
/^(?P<A>a)(?P<A>b)/I,dupnames
Capture group count = 2
Named capture groups:
A 1
A 2
Compile options: dupnames
Overall options: anchored dupnames
First code unit = 'a'
Subject length lower bound = 2
ab\=get=A
0: ab
1: a
2: b
G a (1) A (non-unique)
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
Capture group count = 2
Named capture groups:
A 1
A 2
Options: dupnames
Starting code units: a c
Subject length lower bound = 2
ab\=get=A
0: ab
1: a
2: b
G a (1) A (non-unique)
cd\=get=A
0: cd
Get substring 'A' failed (-55): requested value is not set
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
Capture group count = 4
Named capture groups:
A 1
A 2
A 3
A 4
Options: dupnames
Starting code units: a c
Subject length lower bound = 2
cdefgh\=get=A
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
G ef (2) A (non-unique)
/(?J)^((?P<A>a1)|(?P<A>a2)b)/I
Capture group count = 3
Named capture groups:
A 2
A 3
Compile options: <none>
Overall options: anchored
Duplicate name status changes
First code unit = 'a'
Subject length lower bound = 2
a1b\=copy=A
0: a1
1: a1
2: a1
C a1 (2) A (non-unique)
a2b\=copy=A
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A (non-unique)
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<A>d)/I
Failed: error 143 at offset 38: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
# In this next test, J is not set at the outer level; consequently it isn't set
# in the pattern's options; consequently pcre2_substring_get_byname() produces
# a random value.
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<C>d)/I
Capture group count = 4
Named capture groups:
A 1
B 2
B 3
C 4
Compile options: <none>
Overall options: anchored
Duplicate name status changes
First code unit = 'a'
Subject length lower bound = 6
a bc d\=copy=A,copy=B,copy=C
0: a bc d
1: a
2: b
3: c
4: d
C a (1) A (group 1)
C b (1) B (non-unique)
C d (1) C (group 4)
/^(?P<A>a)?(?(A)a|b)/I
Capture group count = 1
Max back reference = 1
Named capture groups:
A 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
aabc
0: aa
1: a
bc
0: b
\= Expect no match
abc
No match
/(?:(?(ZZ)a|b)(?P<ZZ>X))+/I
Capture group count = 1
Max back reference = 1
Named capture groups:
ZZ 1
Last code unit = 'X'
Subject length lower bound = 2
bXaX
0: bXaX
1: X
/(?:(?(2y)a|b)(X))+/I
Failed: error 124 at offset 7: missing closing parenthesis for condition
/(?:(?(ZA)a|b)(?P<ZZ>X))+/I
Failed: error 115 at offset 6: reference to non-existent subpattern
/(?:(?(ZZ)a|b)(?(ZZ)a|b)(?P<ZZ>X))+/I
Capture group count = 1
Max back reference = 1
Named capture groups:
ZZ 1
Last code unit = 'X'
Subject length lower bound = 3
bbXaaX
0: bbXaaX
1: X
/(?:(?(ZZ)a|\(b\))\\(?P<ZZ>X))+/I
Capture group count = 1
Max back reference = 1
Named capture groups:
ZZ 1
Last code unit = 'X'
Subject length lower bound = 3
(b)\\Xa\\X
0: (b)\Xa\X
1: X
/(?P<ABC/I
Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator?)
/(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
Capture group count = 1
Max back reference = 1
Named capture groups:
A 1
Subject length lower bound = 2
bXXaYYaY
0: bXXaYYaY
1: Y
bXYaXXaX
0: bX
1: X
/()()()()()()()()()(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
Capture group count = 10
Max back reference = 10
Named capture groups:
A 10
Subject length lower bound = 2
bXXaYYaY
0: bXXaYYaY
1:
2:
3:
4:
5:
6:
7:
8:
9:
10: Y
/\s*,\s*/I
Capture group count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20 ,
Last code unit = ','
Subject length lower bound = 1
\x0b,\x0b
0: \x0b,\x0b
\x0c,\x0d
0: \x0c,\x0d
/^abc/Im,newline=lf
Capture group count = 0
Options: multiline
Forced newline is LF
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
xyz\nabc
0: abc
xyz\r\nabc
0: abc
\= Expect no match
xyz\rabc
No match
xyzabc\r
No match
xyzabc\rpqr
No match
xyzabc\r\n
No match
xyzabc\r\npqr
No match
/^abc/Im,newline=crlf
Capture group count = 0
Options: multiline
Forced newline is CRLF
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
xyz\r\nabclf>
0: abc
\= Expect no match
xyz\nabclf
No match
xyz\rabclf
No match
/^abc/Im,newline=cr
Capture group count = 0
Options: multiline
Forced newline is CR
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
xyz\rabc
0: abc
\= Expect no match
xyz\nabc
No match
xyz\r\nabc
No match
/^abc/Im,newline=bad
** Invalid value in 'newline=bad'
/.*/I,newline=lf
Capture group count = 0
May match empty string
Forced newline is LF
First code unit at start or follows newline
Subject length lower bound = 0
abc\ndef
0: abc
abc\rdef
0: abc\x0ddef
abc\r\ndef
0: abc\x0d
/.*/I,newline=cr
Capture group count = 0
May match empty string
Forced newline is CR
First code unit at start or follows newline
Subject length lower bound = 0
abc\ndef
0: abc\x0adef
abc\rdef
0: abc
abc\r\ndef
0: abc
/.*/I,newline=crlf
Capture group count = 0
May match empty string
Forced newline is CRLF
First code unit at start or follows newline
Subject length lower bound = 0
abc\ndef
0: abc\x0adef
abc\rdef
0: abc\x0ddef
abc\r\ndef
0: abc
/\w+(.)(.)?def/Is
Capture group count = 2
Options: dotall
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Last code unit = 'f'
Subject length lower bound = 5
abc\ndef
0: abc\x0adef
1: \x0a
abc\rdef
0: abc\x0ddef
1: \x0d
abc\r\ndef
0: abc\x0d\x0adef
1: \x0d
2: \x0a
/(?P<B>25[0-5]|2[0-4]\d|[01]?\d?\d)(?:\.(?P>B)){3}/I
Capture group count = 1
Named capture groups:
B 1
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = '.'
Subject length lower bound = 7
/()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
(.(.))/Ix
Capture group count = 102
Options: extended
Subject length lower bound = 2
XY\=ovector=133
0: XY
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: XY
102: Y
/(a*b|(?i:c*(?-i)d))/I
Capture group count = 1
Starting code units: C a b c d
Subject length lower bound = 1
/()[ab]xyz/I
Capture group count = 1
Starting code units: a b
Last code unit = 'z'
Subject length lower bound = 4
/(|)[ab]xyz/I
Capture group count = 1
Starting code units: a b
Last code unit = 'z'
Subject length lower bound = 4
/(|c)[ab]xyz/I
Capture group count = 1
Starting code units: a b c
Last code unit = 'z'
Subject length lower bound = 4
/(|c?)[ab]xyz/I
Capture group count = 1
Starting code units: a b c
Last code unit = 'z'
Subject length lower bound = 4
/(d?|c?)[ab]xyz/I
Capture group count = 1
Starting code units: a b c d
Last code unit = 'z'
Subject length lower bound = 4
/(d?|c)[ab]xyz/I
Capture group count = 1
Starting code units: a b c d
Last code unit = 'z'
Subject length lower bound = 4
/^a*b\d/IB
------------------------------------------------------------------
Bra
^
a*+
b
\d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: a b
Last code unit = 'b'
Subject length lower bound = 2
/^a*+b\d/IB
------------------------------------------------------------------
Bra
^
a*+
b
\d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: a b
Last code unit = 'b'
Subject length lower bound = 2
/^a*?b\d/IB
------------------------------------------------------------------
Bra
^
a*+
b
\d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
Starting code units: a b
Last code unit = 'b'
Subject length lower bound = 2
/^a+A\d/IB
------------------------------------------------------------------
Bra
^
a++
A
\d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Last code unit = 'A'
Subject length lower bound = 3
aaaA5
0: aaaA5
\= Expect no match
aaaa5
No match
/^a*A\d/IBi
------------------------------------------------------------------
Bra
^
/i a*
/i A
\d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Compile options: caseless
Overall options: anchored caseless
Starting code units: A a
Last code unit = 'A' (caseless)
Subject length lower bound = 2
aaaA5
0: aaaA5
aaaa5
0: aaaa5
a5
0: a5
/(a*|b*)[cd]/I
Capture group count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a+|b*)[cd]/I
Capture group count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a*|b+)[cd]/I
Capture group count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a+|b+)[cd]/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 2
/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
(((
a
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
)))
/Ix
Capture group count = 203
Options: extended
First code unit = 'a'
Subject length lower bound = 1
large nest
Matched, but too many substrings
0: a
1: a
2: a
3: a
4: a
5: a
6: a
7: a
8: a
9: a
10: a
11: a
12: a
13: a
14: a
/a*\d/B
------------------------------------------------------------------
Bra
a*+
\d
Ket
End
------------------------------------------------------------------
/a*\D/B
------------------------------------------------------------------
Bra
a*
\D
Ket
End
------------------------------------------------------------------
/0*\d/B
------------------------------------------------------------------
Bra
0*
\d
Ket
End
------------------------------------------------------------------
/0*\D/B
------------------------------------------------------------------
Bra
0*+
\D
Ket
End
------------------------------------------------------------------
/a*\s/B
------------------------------------------------------------------
Bra
a*+
\s
Ket
End
------------------------------------------------------------------
/a*\S/B
------------------------------------------------------------------
Bra
a*
\S
Ket
End
------------------------------------------------------------------
/ *\s/B
------------------------------------------------------------------
Bra
*
\s
Ket
End
------------------------------------------------------------------
/ *\S/B
------------------------------------------------------------------
Bra
*+
\S
Ket
End
------------------------------------------------------------------
/a*\w/B
------------------------------------------------------------------
Bra
a*
\w
Ket
End
------------------------------------------------------------------
/a*\W/B
------------------------------------------------------------------
Bra
a*+
\W
Ket
End
------------------------------------------------------------------
/=*\w/B
------------------------------------------------------------------
Bra
=*+
\w
Ket
End
------------------------------------------------------------------
/=*\W/B
------------------------------------------------------------------
Bra
=*
\W
Ket
End
------------------------------------------------------------------
/\d*a/B
------------------------------------------------------------------
Bra
\d*+
a
Ket
End
------------------------------------------------------------------
/\d*2/B
------------------------------------------------------------------
Bra
\d*
2
Ket
End
------------------------------------------------------------------
/\d*\d/B
------------------------------------------------------------------
Bra
\d*
\d
Ket
End
------------------------------------------------------------------
/\d*\D/B
------------------------------------------------------------------
Bra
\d*+
\D
Ket
End
------------------------------------------------------------------
/\d*\s/B
------------------------------------------------------------------
Bra
\d*+
\s
Ket
End
------------------------------------------------------------------
/\d*\S/B
------------------------------------------------------------------
Bra
\d*
\S
Ket
End
------------------------------------------------------------------
/\d*\w/B
------------------------------------------------------------------
Bra
\d*
\w
Ket
End
------------------------------------------------------------------
/\d*\W/B
------------------------------------------------------------------
Bra
\d*+
\W
Ket
End
------------------------------------------------------------------
/\D*a/B
------------------------------------------------------------------
Bra
\D*
a
Ket
End
------------------------------------------------------------------
/\D*2/B
------------------------------------------------------------------
Bra
\D*+
2
Ket
End
------------------------------------------------------------------
/\D*\d/B
------------------------------------------------------------------
Bra
\D*+
\d
Ket
End
------------------------------------------------------------------
/\D*\D/B
------------------------------------------------------------------
Bra
\D*
\D
Ket
End
------------------------------------------------------------------
/\D*\s/B
------------------------------------------------------------------
Bra
\D*
\s
Ket
End
------------------------------------------------------------------
/\D*\S/B
------------------------------------------------------------------
Bra
\D*
\S
Ket
End
------------------------------------------------------------------
/\D*\w/B
------------------------------------------------------------------
Bra
\D*
\w
Ket
End
------------------------------------------------------------------
/\D*\W/B
------------------------------------------------------------------
Bra
\D*
\W
Ket
End
------------------------------------------------------------------
/\s*a/B
------------------------------------------------------------------
Bra
\s*+
a
Ket
End
------------------------------------------------------------------
/\s*2/B
------------------------------------------------------------------
Bra
\s*+
2
Ket
End
------------------------------------------------------------------
/\s*\d/B
------------------------------------------------------------------
Bra
\s*+
\d
Ket
End
------------------------------------------------------------------
/\s*\D/B
------------------------------------------------------------------
Bra
\s*
\D
Ket
End
------------------------------------------------------------------
/\s*\s/B
------------------------------------------------------------------
Bra
\s*
\s
Ket
End
------------------------------------------------------------------
/\s*\S/B
------------------------------------------------------------------
Bra
\s*+
\S
Ket
End
------------------------------------------------------------------
/\s*\w/B
------------------------------------------------------------------
Bra
\s*+
\w
Ket
End
------------------------------------------------------------------
/\s*\W/B
------------------------------------------------------------------
Bra
\s*
\W
Ket
End
------------------------------------------------------------------
/\S*a/B
------------------------------------------------------------------
Bra
\S*
a
Ket
End
------------------------------------------------------------------
/\S*2/B
------------------------------------------------------------------
Bra
\S*
2
Ket
End
------------------------------------------------------------------
/\S*\d/B
------------------------------------------------------------------
Bra
\S*
\d
Ket
End
------------------------------------------------------------------
/\S*\D/B
------------------------------------------------------------------
Bra
\S*
\D
Ket
End
------------------------------------------------------------------
/\S*\s/B
------------------------------------------------------------------
Bra
\S*+
\s
Ket
End
------------------------------------------------------------------
/\S*\S/B
------------------------------------------------------------------
Bra
\S*
\S
Ket
End
------------------------------------------------------------------
/\S*\w/B
------------------------------------------------------------------
Bra
\S*
\w
Ket
End
------------------------------------------------------------------
/\S*\W/B
------------------------------------------------------------------
Bra
\S*
\W
Ket
End
------------------------------------------------------------------
/\w*a/B
------------------------------------------------------------------
Bra
\w*
a
Ket
End
------------------------------------------------------------------
/\w*2/B
------------------------------------------------------------------
Bra
\w*
2
Ket
End
------------------------------------------------------------------
/\w*\d/B
------------------------------------------------------------------
Bra
\w*
\d
Ket
End
------------------------------------------------------------------
/\w*\D/B
------------------------------------------------------------------
Bra
\w*
\D
Ket
End
------------------------------------------------------------------
/\w*\s/B
------------------------------------------------------------------
Bra
\w*+
\s
Ket
End
------------------------------------------------------------------
/\w*\S/B
------------------------------------------------------------------
Bra
\w*
\S
Ket
End
------------------------------------------------------------------
/\w*\w/B
------------------------------------------------------------------
Bra
\w*
\w
Ket
End
------------------------------------------------------------------
/\w*\W/B
------------------------------------------------------------------
Bra
\w*+
\W
Ket
End
------------------------------------------------------------------
/\W*a/B
------------------------------------------------------------------
Bra
\W*+
a
Ket
End
------------------------------------------------------------------
/\W*2/B
------------------------------------------------------------------
Bra
\W*+
2
Ket
End
------------------------------------------------------------------
/\W*\d/B
------------------------------------------------------------------
Bra
\W*+
\d
Ket
End
------------------------------------------------------------------
/\W*\D/B
------------------------------------------------------------------
Bra
\W*
\D
Ket
End
------------------------------------------------------------------
/\W*\s/B
------------------------------------------------------------------
Bra
\W*
\s
Ket
End
------------------------------------------------------------------
/\W*\S/B
------------------------------------------------------------------
Bra
\W*
\S
Ket
End
------------------------------------------------------------------
/\W*\w/B
------------------------------------------------------------------
Bra
\W*+
\w
Ket
End
------------------------------------------------------------------
/\W*\W/B
------------------------------------------------------------------
Bra
\W*
\W
Ket
End
------------------------------------------------------------------
/[^a]+a/B
------------------------------------------------------------------
Bra
[^a]++
a
Ket
End
------------------------------------------------------------------
/[^a]+a/Bi
------------------------------------------------------------------
Bra
/i [^a]++
/i a
Ket
End
------------------------------------------------------------------
/[^a]+A/Bi
------------------------------------------------------------------
Bra
/i [^a]++
/i A
Ket
End
------------------------------------------------------------------
/[^a]+b/B
------------------------------------------------------------------
Bra
[^a]+
b
Ket
End
------------------------------------------------------------------
/[^a]+\d/B
------------------------------------------------------------------
Bra
[^a]+
\d
Ket
End
------------------------------------------------------------------
/a*[^a]/B
------------------------------------------------------------------
Bra
a*+
[^a]
Ket
End
------------------------------------------------------------------
/(?P<abc>x)(?P<xyz>y)/I
Capture group count = 2
Named capture groups:
abc 1
xyz 2
First code unit = 'x'
Last code unit = 'y'
Subject length lower bound = 2
xy\=copy=abc,copy=xyz
0: xy
1: x
2: y
C x (1) abc (group 1)
C y (1) xyz (group 2)
/(?<abc>x)(?'xyz'y)/I
Capture group count = 2
Named capture groups:
abc 1
xyz 2
First code unit = 'x'
Last code unit = 'y'
Subject length lower bound = 2
xy\=copy=abc,copy=xyz
0: xy
1: x
2: y
C x (1) abc (group 1)
C y (1) xyz (group 2)
/(?<abc'x)(?'xyz'y)/I
Failed: error 142 at offset 6: syntax error in subpattern name (missing terminator?)
/(?<abc>x)(?'xyz>y)/I
Failed: error 142 at offset 15: syntax error in subpattern name (missing terminator?)
/(?P'abc'x)(?P<xyz>y)/I
Failed: error 141 at offset 3: unrecognized character after (?P
/^(?:(?(ZZ)a|b)(?<ZZ>X))+/
bXaX
0: bXaX
1: X
bXbX
0: bX
1: X
\= Expect no match
aXaX
No match
aXbX
No match
/^(?P>abc)(?<abcd>xxx)/
Failed: error 115 at offset 5: reference to non-existent subpattern
/^(?P>abc)(?<abc>x|y)/
xx
0: xx
1: x
xy
0: xy
1: y
yy
0: yy
1: y
yx
0: yx
1: x
/^(?P>abc)(?P<abc>x|y)/
xx
0: xx
1: x
xy
0: xy
1: y
yy
0: yy
1: y
yx
0: yx
1: x
/^((?(abc)a|b)(?<abc>x|y))+/
bxay
0: bxay
1: ay
2: y
bxby
0: bx
1: bx
2: x
\= Expect no match
axby
No match
/^(((?P=abc)|X)(?<abc>x|y))+/
XxXxxx
0: XxXxxx
1: xx
2: x
3: x
XxXyyx
0: XxXyyx
1: yx
2: y
3: x
XxXyxx
0: XxXy
1: Xy
2: X
3: y
\= Expect no match
x
No match
/^(?1)(abc)/
abcabc
0: abcabc
1: abc
/^(?:(?:\1|X)(a|b))+/
Xaaa
0: Xaaa
1: a
Xaba
0: Xa
1: a
/^[\E\Qa\E-\Qz\E]+/B
------------------------------------------------------------------
Bra
^
[a-z]++
Ket
End
------------------------------------------------------------------
/^[a\Q]bc\E]/B
------------------------------------------------------------------
Bra
^
[\]a-c]
Ket
End
------------------------------------------------------------------
/^[a-\Q\E]/B
------------------------------------------------------------------
Bra
^
[\-a]
Ket
End
------------------------------------------------------------------
/^(?P>abc)[()](?<abc>)/B
------------------------------------------------------------------
Bra
^
Recurse
[()]
CBra 1
Ket
Ket
End
------------------------------------------------------------------
/^((?(abc)y)[()](?P<abc>x))+/B
------------------------------------------------------------------
Bra
^
CBra 1
Cond
2 Cond ref
y
Ket
[()]
CBra 2
x
Ket
KetRmax
Ket
End
------------------------------------------------------------------
(xy)x
0: (xy)x
1: y)x
2: x
/^(?P>abc)\Q()\E(?<abc>)/B
------------------------------------------------------------------
Bra
^
Recurse
()
CBra 1
Ket
Ket
End
------------------------------------------------------------------
/^(?P>abc)[a\Q(]\E(](?<abc>)/B
------------------------------------------------------------------
Bra
^
Recurse
[(\]a]
CBra 1
Ket
Ket
End
------------------------------------------------------------------
/^(?P>abc) # this is (a comment)
(?<abc>)/Bx
------------------------------------------------------------------
Bra
^
Recurse
CBra 1
Ket
Ket
End
------------------------------------------------------------------
/^\W*(?:(?<one>(?<two>.)\W*(?&one)\W*\k<two>|)|(?<three>(?<four>.)\W*(?&three)\W*\k'four'|\W*.\W*))\W*$/Ii
Capture group count = 4
Max back reference = 4
Named capture groups:
four 4
one 1
three 3
two 2
May match empty string
Compile options: caseless
Overall options: anchored caseless
Subject length lower bound = 0
1221
0: 1221
1: 1221
2: 1
Satan, oscillate my metallic sonatas!
0: Satan, oscillate my metallic sonatas!
1: <unset>
2: <unset>
3: Satan, oscillate my metallic sonatas
4: S
A man, a plan, a canal: Panama!
0: A man, a plan, a canal: Panama!
1: <unset>
2: <unset>
3: A man, a plan, a canal: Panama
4: A
Able was I ere I saw Elba.
0: Able was I ere I saw Elba.
1: <unset>
2: <unset>
3: Able was I ere I saw Elba
4: A
\= Expect no match
The quick brown fox
No match
/(?=(\w+))\1:/I
Capture group count = 1
Max back reference = 1
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Last code unit = ':'
Subject length lower bound = 2
abcd:
0: abcd:
1: abcd
/(?=(?'abc'\w+))\k<abc>:/I
Capture group count = 1
Max back reference = 1
Named capture groups:
abc 1
Starting code units: 0 1 2 3 4 5 6 7 8 9 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 _ 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
Last code unit = ':'
Subject length lower bound = 2
abcd:
0: abcd:
1: abcd
/(?'abc'a|b)(?<abc>d|e)\k<abc>{2}/dupnames
adaa
0: adaa
1: a
2: d
\= Expect no match
addd
No match
adbb
No match
/(?'abc'a|b)(?<abc>d|e)(?&abc){2}/dupnames
bdaa
0: bdaa
1: b
2: d
bdab
0: bdab
1: b
2: d
\= Expect no match
bddd
No match
/(?(<bc))/
Failed: error 142 at offset 6: syntax error in subpattern name (missing terminator?)
/(?(''))/
Failed: error 162 at offset 4: subpattern name expected
/(?('R')stuff)/
Failed: error 115 at offset 4: reference to non-existent subpattern
/((abc (?(R) (?(R1)1) (?(R2)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
0: abcabc1Xabc2XabcX
1: abcabc1Xabc2XabcX
2: abcabc1Xabc2XabcX
/(?<A> (?'B' abc (?(R) (?(R&A)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
0: abcabc1Xabc2XabcX
1: abcabc1Xabc2XabcX
2: abcabc1Xabc2XabcX
/(?<A> (?'B' abc (?(R) (?(R&C)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
Failed: error 115 at offset 27: reference to non-existent subpattern
/^(?(DEFINE) abc | xyz ) /x
Failed: error 154 at offset 4: DEFINE subpattern contains more than one branch
/(?(DEFINE) abc) xyz/Ix
Capture group count = 0
Options: extended
First code unit = 'x'
Last code unit = 'z'
Subject length lower bound = 3
/(a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4\=ovector=0
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
1:
\= Expect no match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=ovector=0
No match
/^a.b/newline=lf
a\rb
0: a\x0db
\= Expect no match
a\nb
No match
/^a.b/newline=cr
a\nb
0: a\x0ab
\= Expect no match
a\rb
No match
/^a.b/newline=anycrlf
a\x85b
0: a\x85b
\= Expect no match
a\rb
No match
/^a.b/newline=any
\= Expect no match
a\nb
No match
a\rb
No match
a\x85b
No match
/^abc./gmx,newline=any
abc1 \x0aabc2 \x0babc3xx \x0cabc4 \x0dabc5xx \x0d\x0aabc6 \x85abc7 JUNK
0: abc1
0: abc2
0: abc3
0: abc4
0: abc5
0: abc6
0: abc7
/abc.$/gmx,newline=any
abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc7 abc9
0: abc1
0: abc2
0: abc3
0: abc4
0: abc5
0: abc6
0: abc9
/^a\Rb/bsr=unicode
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
\= Expect no match
a\n\rb
No match
/^a\R*b/bsr=unicode
ab
0: ab
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
a\n\rb
0: a\x0a\x0db
a\n\r\x85\x0cb
0: a\x0a\x0d\x85\x0cb
/^a\R+b/bsr=unicode
a\nb
0: a\x0ab
a\rb
0: a\x0db
a\r\nb
0: a\x0d\x0ab
a\x0bb
0: a\x0bb
a\x0cb
0: a\x0cb
a\x85b
0: a\x85b
a\n\rb
0: a\x0a\x0db
a\n\r\x85\x0cb
0: a\x0a\x0d\x85\x0cb
\= Expect no match
ab
No match
/^a\R{1,3}b/bsr=unicode
a\nb
0: a\x0ab
a\n\rb
0: a\x0a\x0db
a\n\r\x85b
0: a\x0a\x0d\x85b
a\r\n\r\nb
0: a\x0d\x0a\x0d\x0ab
a\r\n\r\n\r\nb
0: a\x0d\x0a\x0d\x0a\x0d\x0ab
a\n\r\n\rb
0: a\x0a\x0d\x0a\x0db
a\n\n\r\nb
0: a\x0a\x0a\x0d\x0ab
\= Expect no match
a\n\n\n\rb
No match
a\r
No match
/(?&abc)X(?<abc>P)/I
Capture group count = 1
Named capture groups:
abc 1
Last code unit = 'P'
Subject length lower bound = 3
abcPXP123
0: PXP
1: P
/(?1)X(?<abc>P)/I
Capture group count = 1
Named capture groups:
abc 1
Last code unit = 'P'
Subject length lower bound = 3
abcPXP123
0: PXP
1: P
/(?:a(?&abc)b)*(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
123axbaxbaxb456
0: x
1: x
/(?:a(?&abc)b){1,5}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(?:a(?&abc)b){2,5}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(?:a(?&abc)b){2,}(?<abc>x)/
123axbaxbaxbx456
0: axbaxbaxbx
1: x
/(abc)(?i:(?1))/
defabcabcxyz
0: abcabc
1: abc
\= Expect no match
DEFabcABCXYZ
No match
/(abc)(?:(?i)(?1))/
defabcabcxyz
0: abcabc
1: abc
\= Expect no match
DEFabcABCXYZ
No match
/^(a)\g-2/
Failed: error 115 at offset 8: reference to non-existent subpattern
/^(a)\g/
Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/^(a)\g{0}/
Failed: error 115 at offset 9: reference to non-existent subpattern
/^(a)\g{3/
Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/^(a)\g{aa}/
Failed: error 115 at offset 7: reference to non-existent subpattern
/^a.b/newline=lf
a\rb
0: a\x0db
\= Expect no match
a\nb
No match
/.+foo/
afoo
0: afoo
\= Expect no match
\r\nfoo
No match
\nfoo
No match
/.+foo/newline=crlf
afoo
0: afoo
\nfoo
0: \x0afoo
\= Expect no match
\r\nfoo
No match
/.+foo/newline=any
afoo
0: afoo
\= Expect no match
\nfoo
No match
\r\nfoo
No match
/.+foo/s
afoo
0: afoo
\r\nfoo
0: \x0d\x0afoo
\nfoo
0: \x0afoo
/^$/gm,newline=any
abc\r\rxyz
0:
abc\n\rxyz
0:
\= Expect no match
abc\r\nxyz
No match
/(?m)^$/g,newline=any,aftertext
abc\r\n\r\n
0:
0+ \x0d\x0a
/(?m)^$|^\r\n/g,newline=any,aftertext
abc\r\n\r\n
0:
0+ \x0d\x0a
0: \x0d\x0a
0+
/(?m)$/g,newline=any,aftertext
abc\r\n\r\n
0:
0+ \x0d\x0a\x0d\x0a
0:
0+ \x0d\x0a
0:
0+
/abc.$/gmx,newline=anycrlf
abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc9
0: abc1
0: abc4
0: abc5
0: abc9
/^X/m
XABC
0: X
\= Expect no match
XABC\=notbol
No match
/(ab|c)(?-1)/B
------------------------------------------------------------------
Bra
CBra 1
ab
Alt
c
Ket
Recurse
Ket
End
------------------------------------------------------------------
abc
0: abc
1: ab
/xy(?+1)(abc)/B
------------------------------------------------------------------
Bra
xy
Recurse
CBra 1
abc
Ket
Ket
End
------------------------------------------------------------------
xyabcabc
0: xyabcabc
1: abc
\= Expect no match
xyabc
No match
/x(?-0)y/
Failed: error 126 at offset 5: a relative value of zero is not allowed
/x(?-1)y/
Failed: error 115 at offset 5: reference to non-existent subpattern
/x(?+0)y/
Failed: error 126 at offset 5: a relative value of zero is not allowed
/x(?+1)y/
Failed: error 115 at offset 5: reference to non-existent subpattern
/^(abc)?(?(-1)X|Y)/B
------------------------------------------------------------------
Bra
^
Brazero
CBra 1
abc
Ket
Cond
1 Cond ref
X
Alt
Y
Ket
Ket
End
------------------------------------------------------------------
abcX
0: abcX
1: abc
Y
0: Y
\= Expect no match
abcY
No match
/^((?(+1)X|Y)(abc))+/B
------------------------------------------------------------------
Bra
^
CBra 1
Cond
2 Cond ref
X
Alt
Y
Ket
CBra 2
abc
Ket
KetRmax
Ket
End
------------------------------------------------------------------
YabcXabc
0: YabcXabc
1: Xabc
2: abc
YabcXabcXabc
0: YabcXabcXabc
1: Xabc
2: abc
\= Expect no match
XabcXabc
No match
/(?(-1)a)/B
Failed: error 115 at offset 5: reference to non-existent subpattern
/((?(-1)a))/B
------------------------------------------------------------------
Bra
CBra 1
Cond
1 Cond ref
a
Ket
Ket
Ket
End
------------------------------------------------------------------
/((?(-2)a))/B
Failed: error 115 at offset 6: reference to non-existent subpattern
/^(?(+1)X|Y)(.)/B
------------------------------------------------------------------
Bra
^
Cond
1 Cond ref
X
Alt
Y
Ket
CBra 1
Any
Ket
Ket
End
------------------------------------------------------------------
Y!
0: Y!
1: !
/(?<A>tom|bon)-\k{A}/
tom-tom
0: tom-tom
1: tom
bon-bon
0: bon-bon
1: bon
\= Expect no match
tom-bon
No match
/\g{A/
Failed: error 142 at offset 4: syntax error in subpattern name (missing terminator?)
/(?|(abc)|(xyz))/B
------------------------------------------------------------------
Bra
Bra
CBra 1
abc
Ket
Alt
CBra 1
xyz
Ket
Ket
Ket
End
------------------------------------------------------------------
>abc<
0: abc
1: abc
>xyz<
0: xyz
1: xyz
/(x)(?|(abc)|(xyz))(x)/B
------------------------------------------------------------------
Bra
CBra 1
x
Ket
Bra
CBra 2
abc
Ket
Alt
CBra 2
xyz
Ket
Ket
CBra 3
x
Ket
Ket
End
------------------------------------------------------------------
xabcx
0: xabcx
1: x
2: abc
3: x
xxyzx
0: xxyzx
1: x
2: xyz
3: x
/(x)(?|(abc)(pqr)|(xyz))(x)/B
------------------------------------------------------------------
Bra
CBra 1
x
Ket
Bra
CBra 2
abc
Ket
CBra 3
pqr
Ket
Alt
CBra 2
xyz
Ket
Ket
CBra 4
x
Ket
Ket
End
------------------------------------------------------------------
xabcpqrx
0: xabcpqrx
1: x
2: abc
3: pqr
4: x
xxyzx
0: xxyzx
1: x
2: xyz
3: <unset>
4: x
/\H++X/B
------------------------------------------------------------------
Bra
\H++
X
Ket
End
------------------------------------------------------------------
\= Expect no match
XXXX
No match
/\H+\hY/B
------------------------------------------------------------------
Bra
\H++
\h
Y
Ket
End
------------------------------------------------------------------
XXXX Y
0: XXXX Y
/\H+ Y/B
------------------------------------------------------------------
Bra
\H++
Y
Ket
End
------------------------------------------------------------------
/\h+A/B
------------------------------------------------------------------
Bra
\h++
A
Ket
End
------------------------------------------------------------------
/\v*B/B
------------------------------------------------------------------
Bra
\v*+
B
Ket
End
------------------------------------------------------------------
/\V+\x0a/B
------------------------------------------------------------------
Bra
\V++
\x0a
Ket
End
------------------------------------------------------------------
/A+\h/B
------------------------------------------------------------------
Bra
A++
\h
Ket
End
------------------------------------------------------------------
/ *\H/B
------------------------------------------------------------------
Bra
*+
\H
Ket
End
------------------------------------------------------------------
/A*\v/B
------------------------------------------------------------------
Bra
A*+
\v
Ket
End
------------------------------------------------------------------
/\x0b*\V/B
------------------------------------------------------------------
Bra
\x0b*+
\V
Ket
End
------------------------------------------------------------------
/\d+\h/B
------------------------------------------------------------------
Bra
\d++
\h
Ket
End
------------------------------------------------------------------
/\d*\v/B
------------------------------------------------------------------
Bra
\d*+
\v
Ket
End
------------------------------------------------------------------
/S+\h\S+\v/B
------------------------------------------------------------------
Bra
S++
\h
\S++
\v
Ket
End
------------------------------------------------------------------
/\w{3,}\h\w+\v/B
------------------------------------------------------------------
Bra
\w{3}
\w*+
\h
\w++
\v
Ket
End
------------------------------------------------------------------
/\h+\d\h+\w\h+\S\h+\H/B
------------------------------------------------------------------
Bra
\h++
\d
\h++
\w
\h++
\S
\h++
\H
Ket
End
------------------------------------------------------------------
/\v+\d\v+\w\v+\S\v+\V/B
------------------------------------------------------------------
Bra
\v++
\d
\v++
\w
\v++
\S
\v++
\V
Ket
End
------------------------------------------------------------------
/\H+\h\H+\d/B
------------------------------------------------------------------
Bra
\H++
\h
\H+
\d
Ket
End
------------------------------------------------------------------
/\V+\v\V+\w/B
------------------------------------------------------------------
Bra
\V++
\v
\V+
\w
Ket
End
------------------------------------------------------------------
/\( (?: [^()]* | (?R) )* \)/x
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/[\E]AAA/
Failed: error 106 at offset 7: missing terminating ] for character class
/[\Q\E]AAA/
Failed: error 106 at offset 9: missing terminating ] for character class
/[^\E]AAA/
Failed: error 106 at offset 8: missing terminating ] for character class
/[^\Q\E]AAA/
Failed: error 106 at offset 10: missing terminating ] for character class
/[\E^]AAA/
Failed: error 106 at offset 8: missing terminating ] for character class
/[\Q\E^]AAA/
Failed: error 106 at offset 10: missing terminating ] for character class
/A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
------------------------------------------------------------------
Bra
A
*PRUNE
B
*SKIP
C
*THEN
D
*COMMIT
E
*FAIL
F
*FAIL
G
*FAIL
H
*ACCEPT
I
Ket
End
------------------------------------------------------------------
/^a+(*FAIL)/auto_callout
\= Expect no match
aaaaaa
--->aaaaaa
+0 ^ ^
+1 ^ a+
+3 ^ ^ (*FAIL)
+3 ^ ^ (*FAIL)
+3 ^ ^ (*FAIL)
+3 ^ ^ (*FAIL)
+3 ^ ^ (*FAIL)
+3 ^^ (*FAIL)
No match
/a+b?c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
--->aaabccc
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ c+
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ c+
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
+0 ^ a+
+2 ^^ b?
+4 ^ ^ c+
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
+6 ^ ^ (*FAIL)
No match
/a+b?(*PRUNE)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
--->aaabccc
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*PRUNE)
+12 ^ ^ c+
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*PRUNE)
+12 ^ ^ c+
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
+0 ^ a+
+2 ^^ b?
+4 ^ ^ (*PRUNE)
+12 ^ ^ c+
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
+14 ^ ^ (*FAIL)
No match
/a+b?(*COMMIT)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
--->aaabccc
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*COMMIT)
+13 ^ ^ c+
+15 ^ ^ (*FAIL)
+15 ^ ^ (*FAIL)
+15 ^ ^ (*FAIL)
No match
/a+b?(*SKIP)c+(*FAIL)/auto_callout
\= Expect no match
aaabcccaaabccc
--->aaabcccaaabccc
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*SKIP)
+11 ^ ^ c+
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*SKIP)
+11 ^ ^ c+
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
No match
/a+b?(*THEN)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
--->aaabccc
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*THEN)
+11 ^ ^ c+
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+0 ^ a+
+2 ^ ^ b?
+4 ^ ^ (*THEN)
+11 ^ ^ c+
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+0 ^ a+
+2 ^^ b?
+4 ^ ^ (*THEN)
+11 ^ ^ c+
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
+13 ^ ^ (*FAIL)
No match
/a(*MARK)b/
Failed: error 166 at offset 7: (*MARK) must have an argument
/\g6666666666/
Failed: error 161 at offset 7: subpattern number is too big
/[\g6666666666]/B
------------------------------------------------------------------
Bra
[6g]
Ket
End
------------------------------------------------------------------
/(?1)\c[/
Failed: error 115 at offset 3: reference to non-existent subpattern
/.+A/newline=crlf
\= Expect no match
\r\nA
No match
/\nA/newline=crlf
\r\nA
0: \x0aA
/[\r\n]A/newline=crlf
\r\nA
0: \x0aA
/(\r|\n)A/newline=crlf
\r\nA
0: \x0aA
1: \x0a
/a(*CR)b/
Failed: error 160 at offset 5: (*VERB) not recognized or malformed
/(*CR)a.b/
a\nb
0: a\x0ab
\= Expect no match
a\rb
No match
/(*CR)a.b/newline=lf
a\nb
0: a\x0ab
\= Expect no match
a\rb
No match
/(*LF)a.b/newline=CRLF
a\rb
0: a\x0db
\= Expect no match
a\nb
No match
/(*CRLF)a.b/
a\rb
0: a\x0db
a\nb
0: a\x0ab
\= Expect no match
a\r\nb
No match
/(*ANYCRLF)a.b/newline=CR
\= Expect no match
a\rb
No match
a\nb
No match
a\r\nb
No match
/(*ANY)a.b/newline=cr
\= Expect no match
a\rb
No match
a\nb
No match
a\r\nb
No match
a\x85b
No match
/(*ANY).*/g
abc\r\ndef
0: abc
0:
0: def
0:
/(*ANYCRLF).*/g
abc\r\ndef
0: abc
0:
0: def
0:
/(*CRLF).*/g
abc\r\ndef
0: abc
0:
0: def
0:
/(*NUL)^.*/
a\nb\x00ccc
0: a\x0ab
/(*NUL)^.*/s
a\nb\x00ccc
0: a\x0ab\x00ccc
/^x/m,newline=NUL
ab\x00xy
0: x
/'#comment' 0d 0a 00 '^x\' 0a 'y'/x,newline=nul,hex
x\nyz
0: x\x0ay
/(*NUL)^X\NY/
X\nY
0: X\x0aY
X\rY
0: X\x0dY
\= Expect no match
X\x00Y
No match
/a\Rb/I,bsr=anycrlf
Capture group count = 0
\R matches CR, LF, or CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\rb
0: a\x0db
a\nb
0: a\x0ab
a\r\nb
0: a\x0d\x0ab
\= Expect no match
a\x85b
No match
a\x0bb
No match
/a\Rb/I,bsr=unicode
Capture group count = 0
\R matches any Unicode newline
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\rb
0: a\x0db
a\nb
0: a\x0ab
a\r\nb
0: a\x0d\x0ab
a\x85b
0: a\x85b
a\x0bb
0: a\x0bb
/a\R?b/I,bsr=anycrlf
Capture group count = 0
\R matches CR, LF, or CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
a\rb
0: a\x0db
a\nb
0: a\x0ab
a\r\nb
0: a\x0d\x0ab
\= Expect no match
a\x85b
No match
a\x0bb
No match
/a\R?b/I,bsr=unicode
Capture group count = 0
\R matches any Unicode newline
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
a\rb
0: a\x0db
a\nb
0: a\x0ab
a\r\nb
0: a\x0d\x0ab
a\x85b
0: a\x85b
a\x0bb
0: a\x0bb
/a\R{2,4}b/I,bsr=anycrlf
Capture group count = 0
\R matches CR, LF, or CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 4
a\r\n\nb
0: a\x0d\x0a\x0ab
a\n\r\rb
0: a\x0a\x0d\x0db
a\r\n\r\n\r\n\r\nb
0: a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0ab
\= Expect no match
a\x85\x85b
No match
a\x0b\x0bb
No match
/a\R{2,4}b/I,bsr=unicode
Capture group count = 0
\R matches any Unicode newline
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 4
a\r\rb
0: a\x0d\x0db
a\n\n\nb
0: a\x0a\x0a\x0ab
a\r\n\n\r\rb
0: a\x0d\x0a\x0a\x0d\x0db
a\x85\x85b
0: a\x85\x85b
a\x0b\x0bb
0: a\x0b\x0bb
\= Expect no match
a\r\r\r\r\rb
No match
/(*BSR_ANYCRLF)a\Rb/I
Capture group count = 0
\R matches CR, LF, or CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\nb
0: a\x0ab
a\rb
0: a\x0db
/(*BSR_UNICODE)a\Rb/I
Capture group count = 0
\R matches any Unicode newline
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\x85b
0: a\x85b
/(*BSR_ANYCRLF)(*CRLF)a\Rb/I
Capture group count = 0
\R matches CR, LF, or CRLF
Forced newline is CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\nb
0: a\x0ab
a\rb
0: a\x0db
/(*CRLF)(*BSR_UNICODE)a\Rb/I
Capture group count = 0
\R matches any Unicode newline
Forced newline is CRLF
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
a\x85b
0: a\x85b
/(*CRLF)(*BSR_ANYCRLF)(*CR)ab/I
Capture group count = 0
\R matches CR, LF, or CRLF
Forced newline is CR
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(?<a>)(?&)/
Failed: error 162 at offset 9: subpattern name expected
/(?<abc>)(?&a)/
Failed: error 115 at offset 11: reference to non-existent subpattern
/(?<a>)(?&aaaaaaaaaaaaaaaaaaaaaaa)/
Failed: error 115 at offset 9: reference to non-existent subpattern
/(?+-a)/
Failed: error 129 at offset 2: digit expected after (?+ or (?-
/(?-+a)/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/(?(-1))/
Failed: error 115 at offset 5: reference to non-existent subpattern
/(?(+10))/
Failed: error 115 at offset 4: reference to non-existent subpattern
/(?(10))/
Failed: error 115 at offset 3: reference to non-existent subpattern
/(?(+2))()()/
/(?(2))()()/
/\k''/
Failed: error 162 at offset 3: subpattern name expected
/\k<>/
Failed: error 162 at offset 3: subpattern name expected
/\k{}/
Failed: error 162 at offset 3: subpattern name expected
/\k/
Failed: error 169 at offset 2: \k is not followed by a braced, angle-bracketed, or quoted name
/\kabc/
Failed: error 169 at offset 2: \k is not followed by a braced, angle-bracketed, or quoted name
/(?P=)/
Failed: error 162 at offset 4: subpattern name expected
/(?P>)/
Failed: error 162 at offset 4: subpattern name expected
/[[:foo:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[:1234:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[:f\oo:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[: :]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[:...:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[:l\ower:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[[:abc\:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/[abc[:x\]pqr:]]/
Failed: error 130 at offset 6: unknown POSIX class name
/[[:a\dz:]]/
Failed: error 130 at offset 3: unknown POSIX class name
/(^(a|b\g<-1'c))/
Failed: error 157 at offset 8: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/^(?+1)(?<a>x|y){0}z/
xzxx
0: xz
yzyy
0: yz
\= Expect no match
xxz
No match
/(\3)(\1)(a)/
\= Expect no match
cat
No match
/(\3)(\1)(a)/allow_empty_class,match_unset_backref,dupnames
cat
0: a
1:
2:
3: a
/TA]/
The ACTA] comes
0: TA]
/TA]/allow_empty_class,match_unset_backref,dupnames
The ACTA] comes
0: TA]
/(?2)[]a()b](abc)/
Failed: error 115 at offset 3: reference to non-existent subpattern
abcbabc
/(?2)[^]a()b](abc)/
Failed: error 115 at offset 3: reference to non-existent subpattern
abcbabc
/(?1)[]a()b](abc)/
abcbabc
0: abcbabc
1: abc
\= Expect no match
abcXabc
No match
/(?1)[^]a()b](abc)/
abcXabc
0: abcXabc
1: abc
\= Expect no match
abcbabc
No match
/(?2)[]a()b](abc)(xyz)/
xyzbabcxyz
0: xyzbabcxyz
1: abc
2: xyz
/(?&N)[]a(?<N>)](?<M>abc)/
Failed: error 115 at offset 3: reference to non-existent subpattern
abc<abc
/(?&N)[]a(?<N>)](abc)/
Failed: error 115 at offset 3: reference to non-existent subpattern
abc<abc
/a[]b/
Failed: error 106 at offset 4: missing terminating ] for character class
/a[^]b/
Failed: error 106 at offset 5: missing terminating ] for character class
/a[]b/allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
No match
/a[]+b/allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
No match
/a[]*+b/allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
No match
/a[^]b/allow_empty_class,match_unset_backref,dupnames
aXb
0: aXb
a\nb
0: a\x0ab
\= Expect no match
ab
No match
/a[^]+b/allow_empty_class,match_unset_backref,dupnames
aXb
0: aXb
a\nX\nXb
0: a\x0aX\x0aXb
\= Expect no match
ab
No match
/a(?!)b/B
------------------------------------------------------------------
Bra
a
*FAIL
b
Ket
End
------------------------------------------------------------------
/(?!)?a/B
------------------------------------------------------------------
Bra
Brazero
Assert not
Ket
a
Ket
End
------------------------------------------------------------------
ab
0: a
/a(*FAIL)+b/
Failed: error 109 at offset 8: quantifier does not follow a repeatable item
/(abc|pqr|123){0}[xyz]/I
Capture group count = 1
Starting code units: x y z
Subject length lower bound = 1
/(?(?=.*b)b|^)/I,auto_callout
Capture group count = 0
May match empty string
Options: auto_callout
Subject length lower bound = 0
adc
--->adc
+0 ^ (?
+2 ^ (?=
+5 ^ .*
+7 ^ ^ b
+7 ^ ^ b
+7 ^^ b
+7 ^ b
+11 ^ ^
+12 ^ )
+13 ^ End of pattern
0:
abc
--->abc
+0 ^ (?
+2 ^ (?=
+5 ^ .*
+7 ^ ^ b
+7 ^ ^ b
+7 ^^ b
+8 ^ ^ )
+9 ^ b
+0 ^ (?
+2 ^ (?=
+5 ^ .*
+7 ^ ^ b
+7 ^^ b
+7 ^ b
+8 ^^ )
+9 ^ b
+10 ^^ |
+13 ^^ End of pattern
0: b
/(?(?=b).*b|^d)/I
Capture group count = 0
Subject length lower bound = 1
/(?(?=.*b).*b|^d)/I
Capture group count = 0
Subject length lower bound = 1
/xyz/auto_callout
xyz
--->xyz
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^ End of pattern
0: xyz
abcxyz
--->abcxyz
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^ End of pattern
0: xyz
\= Expect no match
abc
No match
abcxypqr
No match
/xyz/auto_callout,no_start_optimize
abcxyz
--->abcxyz
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^ End of pattern
0: xyz
\= Expect no match
abc
--->abc
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
No match
abcxypqr
--->abcxypqr
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
No match
/(*NO_START_OPT)xyz/auto_callout
abcxyz
--->abcxyz
+15 ^ x
+15 ^ x
+15 ^ x
+15 ^ x
+16 ^^ y
+17 ^ ^ z
+18 ^ ^ End of pattern
0: xyz
/(*NO_AUTO_POSSESS)a+b/B
------------------------------------------------------------------
Bra
a+
b
Ket
End
------------------------------------------------------------------
/xyz/auto_callout,no_start_optimize
abcxyz
--->abcxyz
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^ End of pattern
0: xyz
/^"((?(?=[a])[^"])|b)*"$/auto_callout
"ab"
--->"ab"
+0 ^ ^
+1 ^ "
+2 ^^ (
+3 ^^ (?
+5 ^^ (?=
+8 ^^ [a]
+11 ^ ^ )
+12 ^^ [^"]
+16 ^ ^ )
+17 ^ ^ |
+3 ^ ^ (?
+5 ^ ^ (?=
+8 ^ ^ [a]
+17 ^ ^ |
+21 ^ ^ "
+18 ^ ^ b
+19 ^ ^ )*
+3 ^ ^ (?
+5 ^ ^ (?=
+8 ^ ^ [a]
+17 ^ ^ |
+21 ^ ^ "
+22 ^ ^ $
+23 ^ ^ End of pattern
0: "ab"
1:
/^"((?(?=[a])[^"])|b)*"$/
"ab"
0: "ab"
1:
/^X(?5)(a)(?|(b)|(q))(c)(d)Y/
Failed: error 115 at offset 5: reference to non-existent subpattern
XYabcdY
/^X(?&N)(a)(?|(b)|(q))(c)(d)(?<N>Y)/
XYabcdY
0: XYabcdY
1: a
2: b
3: c
4: d
5: Y
/Xa{2,4}b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/Xa{2,4}?b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/Xa{2,4}+b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X\d{2,4}b/
X\=ps
Partial match: X
X3\=ps
Partial match: X3
X33\=ps
Partial match: X33
X333\=ps
Partial match: X333
X3333\=ps
Partial match: X3333
/X\d{2,4}?b/
X\=ps
Partial match: X
X3\=ps
Partial match: X3
X33\=ps
Partial match: X33
X333\=ps
Partial match: X333
X3333\=ps
Partial match: X3333
/X\d{2,4}+b/
X\=ps
Partial match: X
X3\=ps
Partial match: X3
X33\=ps
Partial match: X33
X333\=ps
Partial match: X333
X3333\=ps
Partial match: X3333
/X\D{2,4}b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X\D{2,4}?b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X\D{2,4}+b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X[abc]{2,4}b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X[abc]{2,4}?b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X[abc]{2,4}+b/
X\=ps
Partial match: X
Xa\=ps
Partial match: Xa
Xaa\=ps
Partial match: Xaa
Xaaa\=ps
Partial match: Xaaa
Xaaaa\=ps
Partial match: Xaaaa
/X[^a]{2,4}b/
X\=ps
Partial match: X
Xz\=ps
Partial match: Xz
Xzz\=ps
Partial match: Xzz
Xzzz\=ps
Partial match: Xzzz
Xzzzz\=ps
Partial match: Xzzzz
/X[^a]{2,4}?b/
X\=ps
Partial match: X
Xz\=ps
Partial match: Xz
Xzz\=ps
Partial match: Xzz
Xzzz\=ps
Partial match: Xzzz
Xzzzz\=ps
Partial match: Xzzzz
/X[^a]{2,4}+b/
X\=ps
Partial match: X
Xz\=ps
Partial match: Xz
Xzz\=ps
Partial match: Xzz
Xzzz\=ps
Partial match: Xzzz
Xzzzz\=ps
Partial match: Xzzzz
/(Y)X\1{2,4}b/
YX\=ps
Partial match: YX
YXY\=ps
Partial match: YXY
YXYY\=ps
Partial match: YXYY
YXYYY\=ps
Partial match: YXYYY
YXYYYY\=ps
Partial match: YXYYYY
/(Y)X\1{2,4}?b/
YX\=ps
Partial match: YX
YXY\=ps
Partial match: YXY
YXYY\=ps
Partial match: YXYY
YXYYY\=ps
Partial match: YXYYY
YXYYYY\=ps
Partial match: YXYYYY
/(Y)X\1{2,4}+b/
YX\=ps
Partial match: YX
YXY\=ps
Partial match: YXY
YXYY\=ps
Partial match: YXYY
YXYYY\=ps
Partial match: YXYYY
YXYYYY\=ps
Partial match: YXYYYY
/\++\KZ|\d+X|9+Y/startchar
++++123999\=ps
Partial match: 123999
++++123999Y\=ps
0: 999Y
++++Z1234\=ps
0: ++++Z
^^^^
/Z(*F)/
\= Expect no match
Z\=ps
No match
ZA\=ps
No match
/Z(?!)/
\= Expect no match
Z\=ps
No match
ZA\=ps
No match
/dog(sbody)?/
dogs\=ps
0: dog
dogs\=ph
Partial match: dogs
/dog(sbody)??/
dogs\=ps
0: dog
dogs\=ph
0: dog
/dog|dogsbody/
dogs\=ps
0: dog
dogs\=ph
0: dog
/dogsbody|dog/
dogs\=ps
0: dog
dogs\=ph
Partial match: dogs
/\bthe cat\b/
the cat\=ps
0: the cat
the cat\=ph
Partial match: the cat
/abc/
abc\=ps
0: abc
abc\=ph
0: abc
/abc\K123/startchar
xyzabc123pqr
0: abc123
^^^
xyzabc12\=ps
Partial match: abc12
xyzabc12\=ph
Partial match: abc12
/(?<=abc)123/
xyzabc123pqr
0: 123
xyzabc12\=ps
Partial match: 12
xyzabc12\=ph
Partial match: 12
/\babc\b/
+++abc+++
0: abc
+++ab\=ps
Partial match: ab
+++ab\=ph
Partial match: ab
/(?&word)(?&element)(?(DEFINE)(?<element><[^m][^>]>[^<])(?<word>\w*+))/B
------------------------------------------------------------------
Bra
Recurse
Recurse
Cond
Cond false
CBra 1
<
[^m]
[^>]
>
[^<]
Ket
CBra 2
\w*+
Ket
Ket
Ket
End
------------------------------------------------------------------
/(?&word)(?&element)(?(DEFINE)(?<element><[^\d][^>]>[^<])(?<word>\w*+))/B
------------------------------------------------------------------
Bra
Recurse
Recurse
Cond
Cond false
CBra 1
<
[\x00-/:-\xff] (neg)
[^>]
>
[^<]
Ket
CBra 2
\w*+
Ket
Ket
Ket
End
------------------------------------------------------------------
/(ab)(x(y)z(cd(*ACCEPT)))pq/B
------------------------------------------------------------------
Bra
CBra 1
ab
Ket
CBra 2
x
CBra 3
y
Ket
z
CBra 4
cd
Close 4
Close 2
*ACCEPT
Ket
Ket
pq
Ket
End
------------------------------------------------------------------
/abc\K/aftertext,startchar
abcdef
0: abc
^^^
0+ def
abcdef\=notempty_atstart
0: abc
^^^
0+ def
xyzabcdef\=notempty_atstart
0: abc
^^^
0+ def
\= Expect no match
abcdef\=notempty
No match
xyzabcdef\=notempty
No match
/^(?:(?=abc)|abc\K)/aftertext,startchar
abcdef
0:
0+ abcdef
abcdef\=notempty_atstart
0: abc
^^^
0+ def
\= Expect no match
abcdef\=notempty
No match
/a?b?/aftertext
xyz
0:
0+ xyz
xyzabc
0:
0+ xyzabc
xyzabc\=notempty
0: ab
0+ c
xyzabc\=notempty_atstart
0:
0+ yzabc
xyz\=notempty_atstart
0:
0+ yz
\= Expect no match
xyz\=notempty
No match
/^a?b?/aftertext
xyz
0:
0+ xyz
xyzabc
0:
0+ xyzabc
\= Expect no match
xyzabc\=notempty
No match
xyzabc\=notempty_atstart
No match
xyz\=notempty_atstart
No match
xyz\=notempty
No match
/^(?<name>a|b\g<name>c)/
aaaa
0: a
1: a
bacxxx
0: bac
1: bac
bbaccxxx
0: bbacc
1: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
/^(?<name>a|b\g'name'c)/
aaaa
0: a
1: a
bacxxx
0: bac
1: bac
bbaccxxx
0: bbacc
1: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
/^(a|b\g<1>c)/
aaaa
0: a
1: a
bacxxx
0: bac
1: bac
bbaccxxx
0: bbacc
1: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
/^(a|b\g'1'c)/
aaaa
0: a
1: a
bacxxx
0: bac
1: bac
bbaccxxx
0: bbacc
1: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
/^(a|b\g'-1'c)/
aaaa
0: a
1: a
bacxxx
0: bac
1: bac
bbaccxxx
0: bbacc
1: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
/(^(a|b\g<-1>c))/
aaaa
0: a
1: a
2: a
bacxxx
0: bac
1: bac
2: bac
bbaccxxx
0: bbacc
1: bbacc
2: bbacc
bbbacccxx
0: bbbaccc
1: bbbaccc
2: bbbaccc
/(?-i:\g<name>)(?i:(?<name>a))/
XaaX
0: aa
1: a
XAAX
0: AA
1: A
/(?i:\g<name>)(?-i:(?<name>a))/
XaaX
0: aa
1: a
\= Expect no match
XAAX
No match
/(?-i:\g<+1>)(?i:(a))/
XaaX
0: aa
1: a
XAAX
0: AA
1: A
/(?=(?<regex>(?#simplesyntax)\$(?<name>[a-zA-Z_\x{7f}-\x{ff}][a-zA-Z0-9_\x{7f}-\x{ff}]*)(?:\[(?<index>[a-zA-Z0-9_\x{7f}-\x{ff}]+|\$\g<name>)\]|->\g<name>(\(.*?\))?)?|(?#simple syntax withbraces)\$\{(?:\g<name>(?<indices>\[(?:\g<index>|'(?:\\.|[^'\\])*'|"(?:\g<regex>|\\.|[^"\\])*")\])?|\g<complex>|\$\{\g<complex>\})\}|(?#complexsyntax)\{(?<complex>\$(?<segment>\g<name>(\g<indices>*|\(.*?\))?)(?:->\g<segment>)*|\$\g<complex>|\$\{\g<complex>\})\}))\{/
/(?<n>a|b|c)\g<n>*/
abc
0: abc
1: a
accccbbb
0: accccbbb
1: a
/^X(?7)(a)(?|(b)|(q)(r)(s))(c)(d)(Y)/
XYabcdY
0: XYabcdY
1: a
2: b
3: <unset>
4: <unset>
5: c
6: d
7: Y
/(?<=b(?1)|zzz)(a)/
xbaax
0: a
1: a
xzzzax
0: a
1: a
/(a)(?<=b\1)/
/(a)(?<=b+(?1))/
Failed: error 125 at offset 3: lookbehind assertion is not fixed length
/(a+)(?<=b(?1))/
Failed: error 125 at offset 4: lookbehind assertion is not fixed length
/(a(?<=b(?1)))/
Failed: error 125 at offset 2: lookbehind assertion is not fixed length
/(?<=b(?1))xyz/
Failed: error 115 at offset 8: reference to non-existent subpattern
/(?<=b(?1))xyz(b+)pqrstuvew/
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/(a|bc)\1/I
Capture group count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bc)\1{2,3}/I
Capture group count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 3
/(a|bc)(?1)/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 2
/(a|b\1)(a|b\1)/I
Capture group count = 2
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|b\1){2}/I
Capture group count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bbbb\1)(a|bbbb\1)/I
Capture group count = 2
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bbbb\1){2}/I
Capture group count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'F'
Last code unit = ':'
Subject length lower bound = 22
/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/Iis
Capture group count = 11
Options: caseless dotall
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 47
"(?>.*/)foo"I
Capture group count = 0
Last code unit = 'o'
Subject length lower bound = 4
/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /Ix
Capture group count = 0
Options: extended
Last code unit = '-'
Subject length lower bound = 8
/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/Ii
Capture group count = 1
Options: caseless
Starting code units: A B C a b c
Subject length lower bound = 1
/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/I
Capture group count = 0
Starting code units: c d
Last code unit = 'b'
Subject length lower bound = 41
/<a[\s]+href[\s]*=[\s]* # find <a href=
([\"\'])? # find single or double quote
(?(1) (.*?)\1 | ([^\s]+)) # if quote found, match up to next matching
# quote, otherwise match up to next space
/Iisx
Capture group count = 3
Max back reference = 1
Options: caseless dotall extended
First code unit = '<'
Last code unit = '='
Subject length lower bound = 9
/^(?!:) # colon disallowed at start
(?: # start of item
(?: [0-9a-f]{1,4} | # 1-4 hex digits or
(?(1)0 | () ) ) # if null previously matched, fail; else null
: # followed by colon
){1,7} # end item; 1-7 of them required
[0-9a-f]{1,4} $ # final hex number at end of string
(?(1)|.) # check that there was an empty component
/Iix
Capture group count = 1
Max back reference = 1
Compile options: caseless extended
Overall options: anchored caseless extended
Last code unit = ':'
Subject length lower bound = 2
/(?|(?<a>A)|(?<a>B))/I
Capture group count = 1
Named capture groups:
a 1
Starting code units: A B
Subject length lower bound = 1
AB\=copy=a
0: A
1: A
C A (1) a (group 1)
BA\=copy=a
0: B
1: B
C B (1) a (group 1)
/(?|(?<a>A)|(?<b>B))/
Failed: error 165 at offset 16: different names for subpatterns of the same number are not allowed
/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |
b(?<quote> (?<apostrophe>')|(?<realquote>")) )
(?('quote')[a-z]+|[0-9]+)/Ix,dupnames
Capture group count = 6
Max back reference = 4
Named capture groups:
apostrophe 2
apostrophe 5
quote 1
quote 4
realquote 3
realquote 6
Options: dupnames extended
Starting code units: a b
Subject length lower bound = 3
a"aaaaa
0: a"aaaaa
1: "
2: <unset>
3: "
b"aaaaa
0: b"aaaaa
1: <unset>
2: <unset>
3: <unset>
4: "
5: <unset>
6: "
\= Expect no match
b"11111
No match
a"11111
No match
/^(?|(a)(b)(c)(?<D>d)|(?<D>e)) (?('D')X|Y)/IBx,dupnames
------------------------------------------------------------------
Bra
^
Bra
CBra 1
a
Ket
CBra 2
b
Ket
CBra 3
c
Ket
CBra 4
d
Ket
Alt
CBra 1
e
Ket
Ket
Cond
Cond ref <D>2
X
Alt
Y
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 4
Max back reference = 4
Named capture groups:
D 4
D 1
Compile options: dupnames extended
Overall options: anchored dupnames extended
Starting code units: a e
Subject length lower bound = 2
abcdX
0: abcdX
1: a
2: b
3: c
4: d
eX
0: eX
1: e
\= Expect no match
abcdY
No match
ey
No match
/(?<A>a) (b)(c) (?<A>d (?(R&A)$ | (?4)) )/IBx,dupnames
------------------------------------------------------------------
Bra
CBra 1
a
Ket
CBra 2
b
Ket
CBra 3
c
Ket
CBra 4
d
Cond
Cond recurse <A>2
$
Alt
Recurse
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 4
Max back reference = 4
Named capture groups:
A 1
A 4
Options: dupnames extended
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
abcdd
0: abcdd
1: a
2: b
3: c
4: dd
\= Expect no match
abcdde
No match
/abcd*/
xxxxabcd\=ps
0: abcd
xxxxabcd\=ph
Partial match: abcd
/abcd*/i
xxxxabcd\=ps
0: abcd
xxxxabcd\=ph
Partial match: abcd
XXXXABCD\=ps
0: ABCD
XXXXABCD\=ph
Partial match: ABCD
/abc\d*/
xxxxabc1\=ps
0: abc1
xxxxabc1\=ph
Partial match: abc1
/(a)bc\1*/
xxxxabca\=ps
0: abca
1: a
xxxxabca\=ph
Partial match: abca
/abc[de]*/
xxxxabcde\=ps
0: abcde
xxxxabcde\=ph
Partial match: abcde
/(\3)(\1)(a)/allow_empty_class,match_unset_backref,dupnames
cat
0: a
1:
2:
3: a
/(\3)(\1)(a)/I,allow_empty_class,match_unset_backref,dupnames
Capture group count = 3
Max back reference = 3
Options: allow_empty_class dupnames match_unset_backref
Last code unit = 'a'
Subject length lower bound = 1
cat
0: a
1:
2:
3: a
/(\3)(\1)(a)/I
Capture group count = 3
Max back reference = 3
Last code unit = 'a'
Subject length lower bound = 3
\= Expect no match
cat
No match
/i(?(DEFINE)(?<s>a))/I
Capture group count = 1
Named capture groups:
s 1
First code unit = 'i'
Subject length lower bound = 1
i
0: i
/()i(?(1)a)/I
Capture group count = 1
Max back reference = 1
First code unit = 'i'
Subject length lower bound = 1
ia
0: ia
1:
/(?i)a(?-i)b|c/B
------------------------------------------------------------------
Bra
/i a
b
Alt
c
Ket
End
------------------------------------------------------------------
XabX
0: ab
XAbX
0: Ab
CcC
0: c
\= Expect no match
XABX
No match
/(?i)a(?s)b|c/B
------------------------------------------------------------------
Bra
/i ab
Alt
/i c
Ket
End
------------------------------------------------------------------
/(?i)a(?s-i)b|c/B
------------------------------------------------------------------
Bra
/i a
b
Alt
c
Ket
End
------------------------------------------------------------------
/^(ab(c\1)d|x){2}$/B
------------------------------------------------------------------
Bra
^
CBra 1
ab
CBra 2
c
\1
Ket
d
Alt
x
Ket
CBra 1
ab
CBra 2
c
\1
Ket
d
Alt
x
Ket
$
Ket
End
------------------------------------------------------------------
xabcxd
0: xabcxd
1: abcxd
2: cx
/^(?&t)*+(?(DEFINE)(?<t>.))$/B
------------------------------------------------------------------
Bra
^
Braposzero
SBraPos
Recurse
KetRpos
Cond
Cond false
CBra 1
Any
Ket
Ket
$
Ket
End
------------------------------------------------------------------
/^(?&t)*(?(DEFINE)(?<t>.))$/B
------------------------------------------------------------------
Bra
^
Brazero
SBra
Recurse
KetRmax
Cond
Cond false
CBra 1
Any
Ket
Ket
$
Ket
End
------------------------------------------------------------------
# This one is here because Perl gives the match as "b" rather than "ab". I
# believe this to be a Perl bug.
/(?>a\Kb)z|(ab)/
ab\=startchar
0: ab
1: ab
/(?P<L1>(?P<L2>0|)|(?P>L2)(?P>L1))/
abcd
0:
1:
2:
0abc
0: 0
1: 0
2: 0
/abc(*MARK:)pqr/
Failed: error 166 at offset 10: (*MARK) must have an argument
/abc(*:)pqr/
Failed: error 166 at offset 6: (*MARK) must have an argument
/(*COMMIT:X)/B
------------------------------------------------------------------
Bra
*COMMIT X
Ket
End
------------------------------------------------------------------
# This should, and does, fail. In Perl, it does not, which I think is a
# bug because replacing the B in the pattern by (B|D) does make it fail.
# Turning off Perl's optimization by inserting (??{""}) also makes it fail.
/A(*COMMIT)B/aftertext,mark
\= Expect no match
ACABX
No match
# These should be different, but in Perl they are not, which I think
# is a bug in Perl.
/A(*THEN)B|A(*THEN)C/mark
AC
0: AC
/A(*PRUNE)B|A(*PRUNE)C/mark
\= Expect no match
AC
No match
# Mark names can be duplicated. Perl doesn't give a mark for this one,
# though PCRE2 does.
/^A(*:A)B|^X(*:A)Y/mark
\= Expect no match
XAQQ
No match, mark = A
# COMMIT at the start of a pattern should be the same as an anchor. Perl
# optimizations defeat this. So does the PCRE2 optimization unless we disable
# it.
/(*COMMIT)ABC/
ABCDEFG
0: ABC
/(*COMMIT)ABC/no_start_optimize
\= Expect no match
DEFGABC
No match
/^(ab (c+(*THEN)cd) | xyz)/x
\= Expect no match
abcccd
No match
/^(ab (c+(*PRUNE)cd) | xyz)/x
\= Expect no match
abcccd
No match
/^(ab (c+(*FAIL)cd) | xyz)/x
\= Expect no match
abcccd
No match
# Perl gets some of these wrong
/(?>.(*ACCEPT))*?5/
abcde
0: a
/(.(*ACCEPT))*?5/
abcde
0: a
1: a
/(.(*ACCEPT))5/
abcde
0: a
1: a
/(.(*ACCEPT))*5/
abcde
0: a
1: a
/A\NB./B
------------------------------------------------------------------
Bra
A
Any
B
Any
Ket
End
------------------------------------------------------------------
ACBD
0: ACBD
\= Expect no match
A\nB
No match
ACB\n
No match
/A\NB./Bs
------------------------------------------------------------------
Bra
A
Any
B
AllAny
Ket
End
------------------------------------------------------------------
ACBD
0: ACBD
ACB\n
0: ACB\x0a
\= Expect no match
A\nB
No match
/A\NB/newline=crlf
A\nB
0: A\x0aB
A\rB
0: A\x0dB
\= Expect no match
A\r\nB
No match
/\R+b/B
------------------------------------------------------------------
Bra
\R++
b
Ket
End
------------------------------------------------------------------
/\R+\n/B
------------------------------------------------------------------
Bra
\R+
\x0a
Ket
End
------------------------------------------------------------------
/\R+\d/B
------------------------------------------------------------------
Bra
\R++
\d
Ket
End
------------------------------------------------------------------
/\d*\R/B
------------------------------------------------------------------
Bra
\d*+
\R
Ket
End
------------------------------------------------------------------
/\s*\R/B
------------------------------------------------------------------
Bra
\s*
\R
Ket
End
------------------------------------------------------------------
\x20\x0a
0: \x0a
\x20\x0d
0: \x0d
\x20\x0d\x0a
0: \x0d\x0a
/\S*\R/B
------------------------------------------------------------------
Bra
\S*+
\R
Ket
End
------------------------------------------------------------------
a\x0a
0: a\x0a
/X\h*\R/B
------------------------------------------------------------------
Bra
X
\h*+
\R
Ket
End
------------------------------------------------------------------
X\x20\x0a
0: X \x0a
/X\H*\R/B
------------------------------------------------------------------
Bra
X
\H*
\R
Ket
End
------------------------------------------------------------------
X\x0d\x0a
0: X\x0d\x0a
/X\H+\R/B
------------------------------------------------------------------
Bra
X
\H+
\R
Ket
End
------------------------------------------------------------------
X\x0d\x0a
0: X\x0d\x0a
/X\H++\R/B
------------------------------------------------------------------
Bra
X
\H++
\R
Ket
End
------------------------------------------------------------------
\= Expect no match
X\x0d\x0a
No match
/(?<=abc)def/
abc\=ph
Partial match:
/abc$/
abc
0: abc
abc\=ps
0: abc
abc\=ph
Partial match: abc
/abc$/m
abc
0: abc
abc\n
0: abc
abc\=ph
Partial match: abc
abc\n\=ph
0: abc
abc\=ps
0: abc
abc\n\=ps
0: abc
/abc\z/
abc
0: abc
abc\=ps
0: abc
abc\=ph
Partial match: abc
/abc\Z/
abc
0: abc
abc\=ps
0: abc
abc\=ph
Partial match: abc
/abc\b/
abc
0: abc
abc\=ps
0: abc
abc\=ph
Partial match: abc
/abc\B/
abc\=ps
Partial match: abc
abc\=ph
Partial match: abc
\= Expect no match
abc
No match
/.+/
\= Bad offsets
abc\=offset=4
Failed: error -33: bad offset value
abc\=offset=-4
** Invalid value in 'offset=-4'
\= Valid data
abc\=offset=0
0: abc
abc\=offset=1
0: bc
abc\=offset=2
0: c
\= Expect no match
abc\=offset=3
No match
/^\cģ/
Failed: error 168 at offset 3: \c must be followed by a printable ASCII character
/(?P<abn>(?P=abn)xxx)/B
------------------------------------------------------------------
Bra
CBra 1
\1
xxx
Ket
Ket
End
------------------------------------------------------------------
/(a\1z)/B
------------------------------------------------------------------
Bra
CBra 1
a
\1
z
Ket
Ket
End
------------------------------------------------------------------
/(?P<abn>(?P=abn)(?<badstufxxx)/B
Failed: error 142 at offset 29: syntax error in subpattern name (missing terminator?)
/(?P<abn>(?P=axn)xxx)/B
Failed: error 115 at offset 12: reference to non-existent subpattern
/(?P<abn>(?P=axn)xxx)(?<axn>yy)/B
------------------------------------------------------------------
Bra
CBra 1
\2
xxx
Ket
CBra 2
yy
Ket
Ket
End
------------------------------------------------------------------
# These tests are here because Perl gets the first one wrong.
/(\R*)(.)/s
\r\n
0: \x0d
1:
2: \x0d
\r\r\n\n\r
0: \x0d\x0d\x0a\x0a\x0d
1: \x0d\x0d\x0a\x0a
2: \x0d
\r\r\n\n\r\n
0: \x0d\x0d\x0a\x0a\x0d
1: \x0d\x0d\x0a\x0a
2: \x0d
/(\R)*(.)/s
\r\n
0: \x0d
1: <unset>
2: \x0d
\r\r\n\n\r
0: \x0d\x0d\x0a\x0a\x0d
1: \x0a
2: \x0d
\r\r\n\n\r\n
0: \x0d\x0d\x0a\x0a\x0d
1: \x0a
2: \x0d
/((?>\r\n|\n|\x0b|\f|\r|\x85)*)(.)/s
\r\n
0: \x0d
1:
2: \x0d
\r\r\n\n\r
0: \x0d\x0d\x0a\x0a\x0d
1: \x0d\x0d\x0a\x0a
2: \x0d
\r\r\n\n\r\n
0: \x0d\x0d\x0a\x0a\x0d
1: \x0d\x0d\x0a\x0a
2: \x0d
# -------------
/^abc$/B
------------------------------------------------------------------
Bra
^
abc
$
Ket
End
------------------------------------------------------------------
/^abc$/Bm
------------------------------------------------------------------
Bra
/m ^
abc
/m $
Ket
End
------------------------------------------------------------------
/^(a)*+(\w)/
aaaaX
0: aaaaX
1: a
2: X
\= Expect no match
aaaa
No match
/^(?:a)*+(\w)/
aaaaX
0: aaaaX
1: X
\= Expect no match
aaaa
No match
/(a)++1234/IB
------------------------------------------------------------------
Bra
CBraPos 1
a
KetRpos
1234
Ket
End
------------------------------------------------------------------
Capture group count = 1
First code unit = 'a'
Last code unit = '4'
Subject length lower bound = 5
/([abc])++1234/I
Capture group count = 1
Starting code units: a b c
Last code unit = '4'
Subject length lower bound = 5
/(?<=(abc)+)X/
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/(^ab)/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
/(^ab)++/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
/(^ab|^)+/I
Capture group count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(^ab|^)++/I
Capture group count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(?:^ab)/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
/(?:^ab)++/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 2
/(?:^ab|^)+/I
Capture group count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(?:^ab|^)++/I
Capture group count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(.*ab)/I
Capture group count = 1
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(.*ab)++/I
Capture group count = 1
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(.*ab|.*)+/I
Capture group count = 1
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(.*ab|.*)++/I
Capture group count = 1
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?:.*ab)/I
Capture group count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(?:.*ab)++/I
Capture group count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(?:.*ab|.*)+/I
Capture group count = 0
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?:.*ab|.*)++/I
Capture group count = 0
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?=a)[bcd]/I
Capture group count = 0
First code unit = 'a'
Subject length lower bound = 1
/((?=a))[bcd]/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/((?=a))+[bcd]/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/((?=a))++[bcd]/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?=a+)[bcd]/Ii
Capture group count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a+?)[bcd]/Ii
Capture group count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a++)[bcd]/Ii
Capture group count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a{3})[bcd]/Ii
Capture group count = 0
Options: caseless
First code unit = 'a' (caseless)
Last code unit = 'a' (caseless)
Subject length lower bound = 2
/(abc)\1+/
# Perl doesn't get these right IMO (the 3rd is PCRE2-specific)
/(?1)(?:(b(*ACCEPT))){0}/
b
0: b
/(?1)(?:(b(*ACCEPT))){0}c/
bc
0: bc
\= Expect no match
b
No match
/(?1)(?:((*ACCEPT))){0}c/
c
0: c
c\=notempty
0: c
/^.*?(?(?=a)a|b(*THEN)c)/
\= Expect no match
ba
No match
/^.*?(?(?=a)a|bc)/
ba
0: ba
/^.*?(?(?=a)a(*THEN)b|c)/
\= Expect no match
ac
No match
/^.*?(?(?=a)a(*THEN)b)c/
\= Expect no match
ac
No match
/^.*?(a(*THEN)b)c/
\= Expect no match
aabc
No match
/^.*? (?1) c (?(DEFINE)(a(*THEN)b))/x
aabc
0: aabc
/^.*?(a(*THEN)b|z)c/
aabc
0: aabc
1: ab
/^.*?(z|a(*THEN)b)c/
aabc
0: aabc
1: ab
# These are here because they are not Perl-compatible; the studying means the
# mark is not seen.
/(*MARK:A)(*SKIP:B)(C|X)/mark
C
0: C
1: C
MK: A
\= Expect no match
D
No match, mark = A
/(*:A)A+(*SKIP:A)(B|Z)/mark
\= Expect no match
AAAC
No match, mark = A
# ----------------------------
"(?=a*(*ACCEPT)b)c"
c
0: c
c\=notempty
0: c
/(?1)c(?(DEFINE)((*ACCEPT)b))/
c
0: c
c\=notempty
0: c
/(?>(*ACCEPT)b)c/
c
0:
\= Expect no match
c\=notempty
No match
/(?:(?>(a)))+a%/allaftertext
%aa%
0: aa%
0+
1: a
1+ a%
/(a)b|ac/allaftertext
ac\=ovector=1
0: ac
0+
/(a)(b)x|abc/allaftertext
abc\=ovector=2
0: abc
0+
/(a)bc|(a)(b)\2/
abc\=ovector=1
Matched, but too many substrings
0: abc
abc\=ovector=2
0: abc
1: a
aba\=ovector=1
Matched, but too many substrings
0: aba
aba\=ovector=2
Matched, but too many substrings
0: aba
1: <unset>
aba\=ovector=3
Matched, but too many substrings
0: aba
1: <unset>
2: a
aba\=ovector=4
0: aba
1: <unset>
2: a
3: b
/(?(DEFINE)(a(?2)|b)(b(?1)|a))(?:(?1)|(?2))/I
Capture group count = 2
May match empty string
Subject length lower bound = 0
/(a(?2)|b)(b(?1)|a)(?:(?1)|(?2))/I
Capture group count = 2
Starting code units: a b
Subject length lower bound = 3
/(a(?2)|b)(b(?1)|a)(?1)(?2)/I
Capture group count = 2
Starting code units: a b
Subject length lower bound = 4
/(abc)(?1)/I
Capture group count = 1
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 6
/(?:(foo)|(bar)|(baz))X/allcaptures
bazfooX
0: fooX
1: foo
2: <unset>
3: <unset>
foobazbarX
0: barX
1: <unset>
2: bar
3: <unset>
barfooX
0: fooX
1: foo
2: <unset>
3: <unset>
bazX
0: bazX
1: <unset>
2: <unset>
3: baz
foobarbazX
0: bazX
1: <unset>
2: <unset>
3: baz
bazfooX\=ovector=0
0: fooX
1: foo
2: <unset>
3: <unset>
bazfooX\=ovector=1
Matched, but too many substrings
0: fooX
bazfooX\=ovector=2
0: fooX
1: foo
bazfooX\=ovector=3
0: fooX
1: foo
2: <unset>
/(?=abc){3}abc/B
------------------------------------------------------------------
Bra
Assert
abc
Ket
Assert
abc
Ket
Assert
abc
Ket
abc
Ket
End
------------------------------------------------------------------
/(?=abc)+abc/B
------------------------------------------------------------------
Bra
Assert
abc
Ket
Brazero
Assert
abc
Ket
abc
Ket
End
------------------------------------------------------------------
/(?=abc)++abc/B
------------------------------------------------------------------
Bra
Once
Assert
abc
Ket
Brazero
Assert
abc
Ket
Ket
abc
Ket
End
------------------------------------------------------------------
/(?=abc){0}xyz/B
------------------------------------------------------------------
Bra
Skip zero
Assert
abc
Ket
xyz
Ket
End
------------------------------------------------------------------
/(?=(a))?./B
------------------------------------------------------------------
Bra
Brazero
Assert
CBra 1
a
Ket
Ket
Any
Ket
End
------------------------------------------------------------------
/(?=(a))??./B
------------------------------------------------------------------
Bra
Braminzero
Assert
CBra 1
a
Ket
Ket
Any
Ket
End
------------------------------------------------------------------
/^(?=(a)){0}b(?1)/B
------------------------------------------------------------------
Bra
^
Skip zero
Assert
CBra 1
a
Ket
Ket
b
Recurse
Ket
End
------------------------------------------------------------------
/(?(DEFINE)(a))?b(?1)/B
------------------------------------------------------------------
Bra
Cond
Cond false
CBra 1
a
Ket
Ket
b
Recurse
Ket
End
------------------------------------------------------------------
/^(?=(?1))?[az]([abc])d/B
------------------------------------------------------------------
Bra
^
Brazero
Assert
Recurse
Ket
[az]
CBra 1
[a-c]
Ket
d
Ket
End
------------------------------------------------------------------
/^(?!a){0}\w+/B
------------------------------------------------------------------
Bra
^
Skip zero
Assert not
a
Ket
\w++
Ket
End
------------------------------------------------------------------
/(?<=(abc))?xyz/B
------------------------------------------------------------------
Bra
Brazero
Assert back
Reverse
CBra 1
abc
Ket
Ket
xyz
Ket
End
------------------------------------------------------------------
/[:a[:abc]b:]/B
------------------------------------------------------------------
Bra
[:[a-c]
b:]
Ket
End
------------------------------------------------------------------
/^(a(*:A)(d|e(*:B))z|aeq)/auto_callout
adz
--->adz
+0 ^ ^
+1 ^ (
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (
Latest Mark: A
+9 ^^ d
+10 ^ ^ |
+18 ^ ^ z
+19 ^ ^ |
+24 ^ ^ End of pattern
0: adz
1: adz
2: d
aez
--->aez
+0 ^ ^
+1 ^ (
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (
Latest Mark: A
+9 ^^ d
+11 ^^ e
+12 ^ ^ (*:B)
+17 ^ ^ )
Latest Mark: B
+18 ^ ^ z
+19 ^ ^ |
+24 ^ ^ End of pattern
0: aez
1: aez
2: e
aeqwerty
--->aeqwerty
+0 ^ ^
+1 ^ (
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (
Latest Mark: A
+9 ^^ d
+11 ^^ e
+12 ^ ^ (*:B)
+17 ^ ^ )
Latest Mark: B
+18 ^ ^ z
+20 ^ a
+21 ^^ e
+22 ^ ^ q
+23 ^ ^ )
+24 ^ ^ End of pattern
0: aeq
1: aeq
/.(*F)/
\= Expect no match
abc\=ph
No match
/\btype\b\W*?\btext\b\W*?\bjavascript\b/I
Capture group count = 0
Max lookbehind = 1
First code unit = 't'
Last code unit = 't'
Subject length lower bound = 18
/\btype\b\W*?\btext\b\W*?\bjavascript\b|\burl\b\W*?\bshell:|<input\b.*?\btype\b\W*?\bimage\b|\bonkeyup\b\W*?\=/I
Capture group count = 0
Max lookbehind = 1
Starting code units: < o t u
Subject length lower bound = 8
/a(*SKIP)c|b(*ACCEPT)|/I,aftertext
Capture group count = 0
May match empty string
Subject length lower bound = 0
a
0:
0+
/a(*SKIP)c|b(*ACCEPT)cd(*ACCEPT)|x/I
Capture group count = 0
Starting code units: a b x
Subject length lower bound = 1
ax
0: x
'a*(*ACCEPT)b'aftertext
abc\=notempty_atstart
0: a
0+ bc
bbb\=notempty_atstart
0:
0+ bb
\= Expect no match
\=notempty_atstart
No match
/(*ACCEPT)a/I,aftertext
Capture group count = 0
May match empty string
Subject length lower bound = 0
bax
0:
0+ bax
/z(*ACCEPT)a/I,aftertext
Capture group count = 0
First code unit = 'z'
Subject length lower bound = 1
baxzbx
0: z
0+ bx
/^(?>a+)(?>(z+))\w/B
------------------------------------------------------------------
Bra
^
Once
a++
Ket
Once
CBra 1
z++
Ket
Ket
\w
Ket
End
------------------------------------------------------------------
aaaazzzzb
0: aaaazzzzb
1: zzzz
\= Expect no match
aazz
No match
/(.)(\1|a(?2))/
bab
0: bab
1: b
2: ab
/\1|(.)(?R)\1/
cbbbc
0: cbbbc
1: c
/(.)((?(1)c|a)|a(?2))/
\= Expect no match
baa
No match
/(?P<abn>(?P=abn)xxx)/B
------------------------------------------------------------------
Bra
CBra 1
\1
xxx
Ket
Ket
End
------------------------------------------------------------------
/(a\1z)/B
------------------------------------------------------------------
Bra
CBra 1
a
\1
z
Ket
Ket
End
------------------------------------------------------------------
/^a\x41z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
0: aAz
\= Expect no match
ax41z
No match
/^a[m\x41]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
0: aAz
/^a\x1z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
ax1z
0: ax1z
/^a\u0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
0: aAz
\= Expect no match
au0041z
No match
/^a[m\u0041]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
0: aAz
/^a\u041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
au041z
0: au041z
\= Expect no match
aAz
No match
/^a\U0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aU0041z
0: aU0041z
\= Expect no match
aAz
No match
/^\u{7a}/alt_bsux
u{7a}
0: u{7a}
\= Expect no match
zoo
No match
/^\u{7a}/extra_alt_bsux
zoo
0: z
/(?(?=c)c|d)++Y/B
------------------------------------------------------------------
Bra
BraPos
Cond
Assert
c
Ket
c
Alt
d
Ket
KetRpos
Y
Ket
End
------------------------------------------------------------------
/(?(?=c)c|d)*+Y/B
------------------------------------------------------------------
Bra
Braposzero
BraPos
Cond
Assert
c
Ket
c
Alt
d
Ket
KetRpos
Y
Ket
End
------------------------------------------------------------------
/a[\NB]c/
Failed: error 171 at offset 4: \N is not supported in a class
aNc
/a[B-\Nc]/
Failed: error 150 at offset 6: invalid range in character class
/a[B\Nc]/
Failed: error 171 at offset 5: \N is not supported in a class
/(a)(?2){0,1999}?(b)/
/(a)(?(DEFINE)(b))(?2){0,1999}?(?2)/
# This test, with something more complicated than individual letters, causes
# different behaviour in Perl. Perhaps it disables some optimization; no tag is
# passed back for the failures, whereas in PCRE2 there is a tag.
/(A|P)(*:A)(B|P) | (X|P)(X|P)(*:B)(Y|P)/x,mark
AABC
0: AB
1: A
2: B
MK: A
XXYZ
0: XXY
1: <unset>
2: <unset>
3: X
4: X
5: Y
MK: B
\= Expect no match
XAQQ
No match, mark = A
XAQQXZZ
No match, mark = A
AXQQQ
No match, mark = A
AXXQQQ
No match, mark = B
# Perl doesn't give marks for these, though it does if the alternatives are
# replaced by single letters.
/(b|q)(*:m)f|a(*:n)w/mark
aw
0: aw
MK: n
\= Expect no match
abc
No match, mark = m
/(q|b)(*:m)f|a(*:n)w/mark
aw
0: aw
MK: n
\= Expect no match
abc
No match, mark = m
# After a partial match, the behaviour is as for a failure.
/^a(*:X)bcde/mark
abc\=ps
Partial match, mark=X: abc
# These are here because Perl doesn't return a mark, except for the first.
/(?=(*:x))(q|)/aftertext,mark
abc
0:
0+ abc
1:
MK: x
/(?=(*:x))((*:y)q|)/aftertext,mark
abc
0:
0+ abc
1:
MK: x
/(?=(*:x))(?:(*:y)q|)/aftertext,mark
abc
0:
0+ abc
MK: x
/(?=(*:x))(?>(*:y)q|)/aftertext,mark
abc
0:
0+ abc
MK: x
/(?=a(*:x))(?!a(*:y)c)/aftertext,mark
ab
0:
0+ ab
MK: x
/(?=a(*:x))(?=a(*:y)c|)/aftertext,mark
ab
0:
0+ ab
MK: x
/(..)\1/
ab\=ps
Partial match: ab
aba\=ps
Partial match: aba
abab\=ps
0: abab
1: ab
/(..)\1/i
ab\=ps
Partial match: ab
abA\=ps
Partial match: abA
aBAb\=ps
0: aBAb
1: aB
/(..)\1{2,}/
ab\=ps
Partial match: ab
aba\=ps
Partial match: aba
abab\=ps
Partial match: abab
ababa\=ps
Partial match: ababa
ababab\=ps
0: ababab
1: ab
ababab\=ph
Partial match: ababab
abababa\=ps
0: ababab
1: ab
abababa\=ph
Partial match: abababa
/(..)\1{2,}/i
ab\=ps
Partial match: ab
aBa\=ps
Partial match: aBa
aBAb\=ps
Partial match: aBAb
AbaBA\=ps
Partial match: AbaBA
abABAb\=ps
0: abABAb
1: ab
aBAbaB\=ph
Partial match: aBAbaB
abABabA\=ps
0: abABab
1: ab
abaBABa\=ph
Partial match: abaBABa
/(..)\1{2,}?x/i
ab\=ps
Partial match: ab
abA\=ps
Partial match: abA
aBAb\=ps
Partial match: aBAb
abaBA\=ps
Partial match: abaBA
abAbaB\=ps
Partial match: abAbaB
abaBabA\=ps
Partial match: abaBabA
abAbABaBx\=ps
0: abAbABaBx
1: ab
/^(..)\1/
aba\=ps
Partial match: aba
/^(..)\1{2,3}x/
aba\=ps
Partial match: aba
ababa\=ps
Partial match: ababa
ababa\=ph
Partial match: ababa
abababx
0: abababx
1: ab
ababababx
0: ababababx
1: ab
/^(..)\1{2,3}?x/
aba\=ps
Partial match: aba
ababa\=ps
Partial match: ababa
ababa\=ph
Partial match: ababa
abababx
0: abababx
1: ab
ababababx
0: ababababx
1: ab
/^(..)(\1{2,3})ab/
abababab
0: abababab
1: ab
2: abab
/^\R/
\r\=ps
0: \x0d
\r\=ph
Partial match: \x0d
/^\R{2,3}x/
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
\r\r\=ps
Partial match: \x0d\x0d
\r\r\=ph
Partial match: \x0d\x0d
\r\r\r\=ps
Partial match: \x0d\x0d\x0d
\r\r\r\=ph
Partial match: \x0d\x0d\x0d
\r\rx
0: \x0d\x0dx
\r\r\rx
0: \x0d\x0d\x0dx
/^\R{2,3}?x/
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
\r\r\=ps
Partial match: \x0d\x0d
\r\r\=ph
Partial match: \x0d\x0d
\r\r\r\=ps
Partial match: \x0d\x0d\x0d
\r\r\r\=ph
Partial match: \x0d\x0d\x0d
\r\rx
0: \x0d\x0dx
\r\r\rx
0: \x0d\x0d\x0dx
/^\R?x/
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
x
0: x
\rx
0: \x0dx
/^\R+x/
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
\r\n\=ps
Partial match: \x0d\x0a
\r\n\=ph
Partial match: \x0d\x0a
\rx
0: \x0dx
/^a$/newline=crlf
a\r\=ps
Partial match: a\x0d
a\r\=ph
Partial match: a\x0d
/^a$/m,newline=crlf
a\r\=ps
Partial match: a\x0d
a\r\=ph
Partial match: a\x0d
/^(a$|a\r)/newline=crlf
a\r\=ps
0: a\x0d
1: a\x0d
a\r\=ph
Partial match: a\x0d
/^(a$|a\r)/m,newline=crlf
a\r\=ps
0: a\x0d
1: a\x0d
a\r\=ph
Partial match: a\x0d
/./newline=crlf
\r\=ps
0: \x0d
\r\=ph
Partial match: \x0d
/.{2,3}/newline=crlf
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
\r\r\=ps
0: \x0d\x0d
\r\r\=ph
Partial match: \x0d\x0d
\r\r\r\=ps
0: \x0d\x0d\x0d
\r\r\r\=ph
Partial match: \x0d\x0d\x0d
/.{2,3}?/newline=crlf
\r\=ps
Partial match: \x0d
\r\=ph
Partial match: \x0d
\r\r\=ps
0: \x0d\x0d
\r\r\=ph
Partial match: \x0d\x0d
\r\r\r\=ps
0: \x0d\x0d
\r\r\r\=ph
0: \x0d\x0d
"AB(C(D))(E(F))?(?(?=\2)(?=\4))"
ABCDGHI\=ovector=01
Matched, but too many substrings
0: ABCD
# These are all run as real matches in test 1; here we are just checking the
# settings of the anchored and startline bits.
/(?>.*?a)(?<=ba)/I
Capture group count = 0
Max lookbehind = 2
Last code unit = 'a'
Subject length lower bound = 1
/(?:.*?a)(?<=ba)/I
Capture group count = 0
Max lookbehind = 2
First code unit at start or follows newline
Last code unit = 'a'
Subject length lower bound = 1
/.*?a(*PRUNE)b/I
Capture group count = 0
Last code unit = 'b'
Subject length lower bound = 2
/.*?a(*PRUNE)b/Is
Capture group count = 0
Options: dotall
Last code unit = 'b'
Subject length lower bound = 2
/^a(*PRUNE)b/Is
Capture group count = 0
Compile options: dotall
Overall options: anchored dotall
First code unit = 'a'
Subject length lower bound = 2
/.*?a(*SKIP)b/I
Capture group count = 0
Last code unit = 'b'
Subject length lower bound = 2
/(?>.*?a)b/Is
Capture group count = 0
Options: dotall
Last code unit = 'b'
Subject length lower bound = 2
/(?>.*?a)b/I
Capture group count = 0
Last code unit = 'b'
Subject length lower bound = 2
/(?>^a)b/Is
Capture group count = 0
Compile options: dotall
Overall options: anchored dotall
First code unit = 'a'
Subject length lower bound = 2
/(?>.*?)(?<=(abcd)|(wxyz))/I
Capture group count = 2
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
/(?>.*)(?<=(abcd)|(wxyz))/I
Capture group count = 2
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
"(?>.*)foo"I
Capture group count = 0
Last code unit = 'o'
Subject length lower bound = 3
"(?>.*?)foo"I
Capture group count = 0
Last code unit = 'o'
Subject length lower bound = 3
/(?>^abc)/Im
Capture group count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
/(?>.*abc)/Im
Capture group count = 0
Options: multiline
Last code unit = 'c'
Subject length lower bound = 3
/(?:.*abc)/Im
Capture group count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
/(?:(a)+(?C1)bb|aa(?C2)b)/
aab\=callout_capture
Callout 1: last capture = 1
1: a
--->aab
^ ^ b
Callout 1: last capture = 1
1: a
--->aab
^^ b
Callout 2: last capture = 0
--->aab
^ ^ b
0: aab
/(?:(a)++(?C1)bb|aa(?C2)b)/
aab\=callout_capture
Callout 1: last capture = 1
1: a
--->aab
^ ^ b
Callout 2: last capture = 0
--->aab
^ ^ b
0: aab
/(?:(?>(a))(?C1)bb|aa(?C2)b)/
aab\=callout_capture
Callout 1: last capture = 1
1: a
--->aab
^^ b
Callout 2: last capture = 0
--->aab
^ ^ b
0: aab
/(?:(?1)(?C1)x|ab(?C2))((a)){0}/
aab\=callout_capture
Callout 1: last capture = 0
--->aab
^^ x
Callout 1: last capture = 0
--->aab
^^ x
Callout 2: last capture = 0
--->aab
^ ^ )
0: ab
/(?1)(?C1)((a)(?C2)){0}/
aab\=callout_capture
Callout 2: last capture = 2
1: <unset>
2: a
--->aab
^^ ){0}
Callout 1: last capture = 0
--->aab
^^ (
0: a
/(?:(a)+(?C1)bb|aa(?C2)b)++/
aab\=callout_capture
Callout 1: last capture = 1
1: a
--->aab
^ ^ b
Callout 1: last capture = 1
1: a
--->aab
^^ b
Callout 2: last capture = 0
--->aab
^ ^ b
0: aab
aab\=callout_capture,ovector=1
Callout 1: last capture = 1
1: a
--->aab
^ ^ b
Callout 1: last capture = 1
1: a
--->aab
^^ b
Callout 2: last capture = 0
--->aab
^ ^ b
0: aab
/(ab)x|ab/
ab\=ovector=0
0: ab
ab\=ovector=1
0: ab
/(?<=123)(*MARK:xx)abc/mark
xxxx123a\=ph
Partial match, mark=xx: a
xxxx123a\=ps
Partial match, mark=xx: a
/123\Kabc/startchar
xxxx123a\=ph
Partial match: 123a
xxxx123a\=ps
Partial match: 123a
/^(?(?=a)aa|bb)/auto_callout
bb
--->bb
+0 ^ ^
+1 ^ (?
+3 ^ (?=
+6 ^ a
+11 ^ b
+12 ^^ b
+13 ^ ^ )
+14 ^ ^ End of pattern
0: bb
/(?C1)^(?C2)(?(?C99)(?=(?C3)a(?C4))(?C5)a(?C6)a(?C7)|(?C8)b(?C9)b(?C10))(?C11)/
bb
--->bb
1 ^ ^
2 ^ (?
99 ^ (?=
3 ^ a
8 ^ b
9 ^^ b
10 ^ ^ )
11 ^ ^ End of pattern
0: bb
# Perl seems to have a bug with this one.
/aaaaa(*COMMIT)(*PRUNE)b|a+c/
aaaaaac
0: aaaac
# Here are some that Perl treats differently because of the way it handles
# backtracking verbs.
/(?!a(*COMMIT)b)ac|ad/
ac
0: ac
ad
0: ad
/^(?!a(*THEN)b|ac)../
ad
0: ad
\= Expect no match
ac
No match
/^(?=a(*THEN)b|ac)/
ac
0:
/\A.*?(?:a|b(*THEN)c)/
ba
0: ba
/\A.*?(?:a|b(*THEN)c)++/
ba
0: ba
/\A.*?(?:a|b(*THEN)c|d)/
ba
0: ba
/(?:(a(*MARK:X)a+(*SKIP:X)b)){0}(?:(?1)|aac)/
aac
0: aac
/\A.*?(a|b(*THEN)c)/
ba
0: ba
1: a
/^(A(*THEN)B|A(*THEN)D)/
AD
0: AD
1: AD
/(?!b(*THEN)a)bn|bnn/
bnn
0: bn
/(?(?=b(*SKIP)a)bn|bnn)/
bnn
0: bnn
/(?=b(*THEN)a|)bn|bnn/
bnn
0: bn
# This test causes a segfault with Perl 5.18.0
/^(?=(a)){0}b(?1)/
backgammon
0: ba
/(?|(?<n>f)|(?<n>b))/I,dupnames
Capture group count = 1
Named capture groups:
n 1
Options: dupnames
Starting code units: b f
Subject length lower bound = 1
/(?<a>abc)(?<a>z)\k<a>()/IB,dupnames
------------------------------------------------------------------
Bra
CBra 1
abc
Ket
CBra 2
z
Ket
\k<a>2
CBra 3
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 3
Max back reference = 2
Named capture groups:
a 1
a 2
Options: dupnames
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 5
/a*[bcd]/B
------------------------------------------------------------------
Bra
a*+
[b-d]
Ket
End
------------------------------------------------------------------
/[bcd]*a/B
------------------------------------------------------------------
Bra
[b-d]*+
a
Ket
End
------------------------------------------------------------------
# A complete set of tests for auto-possessification of character types, but
# omitting \C because it might be disabled (it has its own tests).
/\D+\D \D+\d \D+\S \D+\s \D+\W \D+\w \D+. \D+\R \D+\H \D+\h \D+\V \D+\v \D+\Z \D+\z \D+$/Bx
------------------------------------------------------------------
Bra
\D+
\D
\D++
\d
\D+
\S
\D+
\s
\D+
\W
\D+
\w
\D+
Any
\D+
\R
\D+
\H
\D+
\h
\D+
\V
\D+
\v
\D+
\Z
\D++
\z
\D+
$
Ket
End
------------------------------------------------------------------
/\d+\D \d+\d \d+\S \d+\s \d+\W \d+\w \d+. \d+\R \d+\H \d+\h \d+\V \d+\v \d+\Z \d+\z \d+$/Bx
------------------------------------------------------------------
Bra
\d++
\D
\d+
\d
\d+
\S
\d++
\s
\d++
\W
\d+
\w
\d+
Any
\d++
\R
\d+
\H
\d++
\h
\d+
\V
\d++
\v
\d++
\Z
\d++
\z
\d++
$
Ket
End
------------------------------------------------------------------
/\S+\D \S+\d \S+\S \S+\s \S+\W \S+\w \S+. \S+\R \S+\H \S+\h \S+\V \S+\v \S+\Z \S+\z \S+$/Bx
------------------------------------------------------------------
Bra
\S+
\D
\S+
\d
\S+
\S
\S++
\s
\S+
\W
\S+
\w
\S+
Any
\S++
\R
\S+
\H
\S++
\h
\S+
\V
\S++
\v
\S++
\Z
\S++
\z
\S++
$
Ket
End
------------------------------------------------------------------
/\s+\D \s+\d \s+\S \s+\s \s+\W \s+\w \s+. \s+\R \s+\H \s+\h \s+\V \s+\v \s+\Z \s+\z \s+$/Bx
------------------------------------------------------------------
Bra
\s+
\D
\s++
\d
\s++
\S
\s+
\s
\s+
\W
\s++
\w
\s+
Any
\s+
\R
\s+
\H
\s+
\h
\s+
\V
\s+
\v
\s+
\Z
\s++
\z
\s+
$
Ket
End
------------------------------------------------------------------
/\W+\D \W+\d \W+\S \W+\s \W+\W \W+\w \W+. \W+\R \W+\H \W+\h \W+\V \W+\v \W+\Z \W+\z \W+$/Bx
------------------------------------------------------------------
Bra
\W+
\D
\W++
\d
\W+
\S
\W+
\s
\W+
\W
\W++
\w
\W+
Any
\W+
\R
\W+
\H
\W+
\h
\W+
\V
\W+
\v
\W+
\Z
\W++
\z
\W+
$
Ket
End
------------------------------------------------------------------
/\w+\D \w+\d \w+\S \w+\s \w+\W \w+\w \w+. \w+\R \w+\H \w+\h \w+\V \w+\v \w+\Z \w+\z \w+$/Bx
------------------------------------------------------------------
Bra
\w+
\D
\w+
\d
\w+
\S
\w++
\s
\w++
\W
\w+
\w
\w+
Any
\w++
\R
\w+
\H
\w++
\h
\w+
\V
\w++
\v
\w++
\Z
\w++
\z
\w++
$
Ket
End
------------------------------------------------------------------
/\R+\D \R+\d \R+\S \R+\s \R+\W \R+\w \R+. \R+\R \R+\H \R+\h \R+\V \R+\v \R+\Z \R+\z \R+$/Bx
------------------------------------------------------------------
Bra
\R+
\D
\R++
\d
\R+
\S
\R++
\s
\R+
\W
\R++
\w
\R++
Any
\R+
\R
\R+
\H
\R++
\h
\R+
\V
\R+
\v
\R+
\Z
\R++
\z
\R+
$
Ket
End
------------------------------------------------------------------
/\H+\D \H+\d \H+\S \H+\s \H+\W \H+\w \H+. \H+\R \H+\H \H+\h \H+\V \H+\v \H+\Z \H+\z \H+$/Bx
------------------------------------------------------------------
Bra
\H+
\D
\H+
\d
\H+
\S
\H+
\s
\H+
\W
\H+
\w
\H+
Any
\H+
\R
\H+
\H
\H++
\h
\H+
\V
\H+
\v
\H+
\Z
\H++
\z
\H+
$
Ket
End
------------------------------------------------------------------
/\h+\D \h+\d \h+\S \h+\s \h+\W \h+\w \h+. \h+\R \h+\H \h+\h \h+\V \h+\v \h+\Z \h+\z \h+$/Bx
------------------------------------------------------------------
Bra
\h+
\D
\h++
\d
\h++
\S
\h+
\s
\h+
\W
\h++
\w
\h+
Any
\h++
\R
\h++
\H
\h+
\h
\h+
\V
\h++
\v
\h+
\Z
\h++
\z
\h+
$
Ket
End
------------------------------------------------------------------
/\V+\D \V+\d \V+\S \V+\s \V+\W \V+\w \V+. \V+\R \V+\H \V+\h \V+\V \V+\v \V+\Z \V+\z \V+$/Bx
------------------------------------------------------------------
Bra
\V+
\D
\V+
\d
\V+
\S
\V+
\s
\V+
\W
\V+
\w
\V+
Any
\V++
\R
\V+
\H
\V+
\h
\V+
\V
\V++
\v
\V+
\Z
\V++
\z
\V+
$
Ket
End
------------------------------------------------------------------
/\v+\D \v+\d \v+\S \v+\s \v+\W \v+\w \v+. \v+\R \v+\H \v+\h \v+\V \v+\v \v+\Z \v+\z \v+$/Bx
------------------------------------------------------------------
Bra
\v+
\D
\v++
\d
\v++
\S
\v+
\s
\v+
\W
\v++
\w
\v+
Any
\v+
\R
\v+
\H
\v++
\h
\v++
\V
\v+
\v
\v+
\Z
\v++
\z
\v+
$
Ket
End
------------------------------------------------------------------
/ a+\D a+\d a+\S a+\s a+\W a+\w a+. a+\R a+\H a+\h a+\V a+\v a+\Z a+\z a+$/Bx
------------------------------------------------------------------
Bra
a+
\D
a++
\d
a+
\S
a++
\s
a++
\W
a+
\w
a+
Any
a++
\R
a+
\H
a++
\h
a+
\V
a++
\v
a++
\Z
a++
\z
a++
$
Ket
End
------------------------------------------------------------------
/\n+\D \n+\d \n+\S \n+\s \n+\W \n+\w \n+. \n+\R \n+\H \n+\h \n+\V \n+\v \n+\Z \n+\z \n+$/Bx
------------------------------------------------------------------
Bra
\x0a+
\D
\x0a++
\d
\x0a++
\S
\x0a+
\s
\x0a+
\W
\x0a++
\w
\x0a+
Any
\x0a+
\R
\x0a+
\H
\x0a++
\h
\x0a++
\V
\x0a+
\v
\x0a+
\Z
\x0a++
\z
\x0a+
$
Ket
End
------------------------------------------------------------------
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bx
------------------------------------------------------------------
Bra
Any+
\D
Any+
\d
Any+
\S
Any+
\s
Any+
\W
Any+
\w
Any+
Any
Any++
\R
Any+
\H
Any+
\h
Any+
\V
Any+
\v
Any+
\Z
Any++
\z
Any+
$
Ket
End
------------------------------------------------------------------
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bsx
------------------------------------------------------------------
Bra
AllAny+
\D
AllAny+
\d
AllAny+
\S
AllAny+
\s
AllAny+
\W
AllAny+
\w
AllAny+
AllAny
AllAny+
\R
AllAny+
\H
AllAny+
\h
AllAny+
\V
AllAny+
\v
AllAny+
\Z
AllAny++
\z
AllAny+
$
Ket
End
------------------------------------------------------------------
/ \D+$ \d+$ \S+$ \s+$ \W+$ \w+$ \R+$ \H+$ \h+$ \V+$ \v+$ a+$ \n+$ .+$ .+$/Bmx
------------------------------------------------------------------
Bra
\D+
/m $
\d++
/m $
\S++
/m $
\s+
/m $
\W+
/m $
\w++
/m $
\R+
/m $
\H+
/m $
\h+
/m $
\V+
/m $
\v+
/m $
a+
/m $
\x0a+
/m $
Any+
/m $
Any+
/m $
Ket
End
------------------------------------------------------------------
/(?=a+)a(a+)++a/B
------------------------------------------------------------------
Bra
Assert
a++
Ket
a
CBraPos 1
a+
KetRpos
a
Ket
End
------------------------------------------------------------------
/a+(bb|cc)a+(?:bb|cc)a+(?>bb|cc)a+(?:bb|cc)+a+(aa)a+(?:bb|aa)/B
------------------------------------------------------------------
Bra
a++
CBra 1
bb
Alt
cc
Ket
a++
Bra
bb
Alt
cc
Ket
a++
Once
bb
Alt
cc
Ket
a++
Bra
bb
Alt
cc
KetRmax
a+
CBra 2
aa
Ket
a+
Bra
bb
Alt
aa
Ket
Ket
End
------------------------------------------------------------------
/a+(bb|cc)?#a+(?:bb|cc)??#a+(?:bb|cc)?+#a+(?:bb|cc)*#a+(bb|cc)?a#a+(?:aa)?/B
------------------------------------------------------------------
Bra
a++
Brazero
CBra 1
bb
Alt
cc
Ket
#
a++
Braminzero
Bra
bb
Alt
cc
Ket
#
a++
Once
Brazero
Bra
bb
Alt
cc
Ket
Ket
#
a++
Brazero
Bra
bb
Alt
cc
KetRmax
#
a+
Brazero
CBra 2
bb
Alt
cc
Ket
a#
a+
Brazero
Bra
aa
Ket
Ket
End
------------------------------------------------------------------
/a+(?:bb)?a#a+(?:|||)#a+(?:|b)a#a+(?:|||)?a/B
------------------------------------------------------------------
Bra
a+
Brazero
Bra
bb
Ket
a#
a++
Bra
Alt
Alt
Alt
Ket
#
a+
Bra
Alt
b
Ket
a#
a+
Brazero
Bra
Alt
Alt
Alt
Ket
a
Ket
End
------------------------------------------------------------------
/[ab]*/B
------------------------------------------------------------------
Bra
[ab]*+
Ket
End
------------------------------------------------------------------
aaaa
0: aaaa
/[ab]*?/B
------------------------------------------------------------------
Bra
[ab]*?
Ket
End
------------------------------------------------------------------
aaaa
0:
/[ab]?/B
------------------------------------------------------------------
Bra
[ab]?+
Ket
End
------------------------------------------------------------------
aaaa
0: a
/[ab]??/B
------------------------------------------------------------------
Bra
[ab]??
Ket
End
------------------------------------------------------------------
aaaa
0:
/[ab]+/B
------------------------------------------------------------------
Bra
[ab]++
Ket
End
------------------------------------------------------------------
aaaa
0: aaaa
/[ab]+?/B
------------------------------------------------------------------
Bra
[ab]+?
Ket
End
------------------------------------------------------------------
aaaa
0: a
/[ab]{2,3}/B
------------------------------------------------------------------
Bra
[ab]{2,3}+
Ket
End
------------------------------------------------------------------
aaaa
0: aaa
/[ab]{2,3}?/B
------------------------------------------------------------------
Bra
[ab]{2,3}?
Ket
End
------------------------------------------------------------------
aaaa
0: aa
/[ab]{2,}/B
------------------------------------------------------------------
Bra
[ab]{2,}+
Ket
End
------------------------------------------------------------------
aaaa
0: aaaa
/[ab]{2,}?/B
------------------------------------------------------------------
Bra
[ab]{2,}?
Ket
End
------------------------------------------------------------------
aaaa
0: aa
/\d+\s{0,5}=\s*\S?=\w{0,4}\W*/B
------------------------------------------------------------------
Bra
\d++
\s{0,5}+
=
\s*+
\S?
=
\w{0,4}+
\W*+
Ket
End
------------------------------------------------------------------
/[a-d]{5,12}[e-z0-9]*#[^a-z]+[b-y]*a[2-7]?[^0-9a-z]+/B
------------------------------------------------------------------
Bra
[a-d]{5,12}+
[0-9e-z]*+
#
[\x00-`{-\xff] (neg)++
[b-y]*+
a
[2-7]?+
[\x00-/:-`{-\xff] (neg)++
Ket
End
------------------------------------------------------------------
/[a-z]*\s#[ \t]?\S#[a-c]*\S#[C-G]+?\d#[4-8]*\D#[4-9,]*\D#[!$]{0,5}\w#[M-Xf-l]+\W#[a-c,]?\W/B
------------------------------------------------------------------
Bra
[a-z]*+
\s
#
[\x09 ]?+
\S
#
[a-c]*
\S
#
[C-G]++
\d
#
[4-8]*+
\D
#
[,4-9]*
\D
#
[!$]{0,5}+
\w
#
[M-Xf-l]++
\W
#
[,a-c]?
\W
Ket
End
------------------------------------------------------------------
/a+(aa|bb)*c#a*(bb|cc)*a#a?(bb|cc)*d#[a-f]*(g|hh)*f/B
------------------------------------------------------------------
Bra
a+
Brazero
CBra 1
aa
Alt
bb
KetRmax
c#
a*
Brazero
CBra 2
bb
Alt
cc
KetRmax
a#
a?+
Brazero
CBra 3
bb
Alt
cc
KetRmax
d#
[a-f]*
Brazero
CBra 4
g
Alt
hh
KetRmax
f
Ket
End
------------------------------------------------------------------
/[a-f]*(g|hh|i)*i#[a-x]{4,}(y{0,6})*y#[a-k]+(ll|mm)+n/B
------------------------------------------------------------------
Bra
[a-f]*+
Brazero
CBra 1
g
Alt
hh
Alt
i
KetRmax
i#
[a-x]{4,}
Brazero
SCBra 2
y{0,6}
KetRmax
y#
[a-k]++
CBra 3
ll
Alt
mm
KetRmax
n
Ket
End
------------------------------------------------------------------
/[a-f]*(?>gg|hh)+#[a-f]*(?>gg|hh)?#[a-f]*(?>gg|hh)*a#[a-f]*(?>gg|hh)*h/B
------------------------------------------------------------------
Bra
[a-f]*+
Once
gg
Alt
hh
KetRmax
#
[a-f]*+
Brazero
Once
gg
Alt
hh
Ket
#
[a-f]*
Brazero
Once
gg
Alt
hh
KetRmax
a#
[a-f]*+
Brazero
Once
gg
Alt
hh
KetRmax
h
Ket
End
------------------------------------------------------------------
/[a-c]*d/IB
------------------------------------------------------------------
Bra
[a-c]*+
d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: a b c d
Last code unit = 'd'
Subject length lower bound = 1
/[a-c]+d/IB
------------------------------------------------------------------
Bra
[a-c]++
d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: a b c
Last code unit = 'd'
Subject length lower bound = 2
/[a-c]?d/IB
------------------------------------------------------------------
Bra
[a-c]?+
d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: a b c d
Last code unit = 'd'
Subject length lower bound = 1
/[a-c]{4,6}d/IB
------------------------------------------------------------------
Bra
[a-c]{4,6}+
d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: a b c
Last code unit = 'd'
Subject length lower bound = 5
/[a-c]{0,6}d/IB
------------------------------------------------------------------
Bra
[a-c]{0,6}+
d
Ket
End
------------------------------------------------------------------
Capture group count = 0
Starting code units: a b c d
Last code unit = 'd'
Subject length lower bound = 1
# End of special auto-possessive tests
/^A\o{1239}B/
Failed: error 164 at offset 8: non-octal character in \o{} (closing brace missing?)
A\123B
/^A\oB/
Failed: error 155 at offset 4: missing opening brace after \o
/^A\x{zz}B/
Failed: error 167 at offset 5: non-hex character in \x{} (closing brace missing?)
/^A\x{12Z/
Failed: error 167 at offset 7: non-hex character in \x{} (closing brace missing?)
/^A\x{/
Failed: error 178 at offset 5: digits missing in \x{} or \o{} or \N{U+}
/[ab]++/B,no_auto_possess
------------------------------------------------------------------
Bra
[ab]++
Ket
End
------------------------------------------------------------------
/[^ab]*+/B,no_auto_possess
------------------------------------------------------------------
Bra
[\x00-`c-\xff] (neg)*+
Ket
End
------------------------------------------------------------------
/a{4}+/B,no_auto_possess
------------------------------------------------------------------
Bra
a{4}
Ket
End
------------------------------------------------------------------
/a{4}+/Bi,no_auto_possess
------------------------------------------------------------------
Bra
/i a{4}
Ket
End
------------------------------------------------------------------
/[a-[:digit:]]+/
Failed: error 150 at offset 4: invalid range in character class
/[A-[:digit:]]+/
Failed: error 150 at offset 4: invalid range in character class
/[a-[.xxx.]]+/
Failed: error 150 at offset 4: invalid range in character class
/[a-[=xxx=]]+/
Failed: error 150 at offset 4: invalid range in character class
/[a-[!xxx!]]+/
Failed: error 108 at offset 3: range out of order in character class
/[A-[!xxx!]]+/
A]]]
0: A]]]
/[a-\d]+/
Failed: error 150 at offset 5: invalid range in character class
/(?<0abc>xx)/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/(?&1abc)xx(?<1abc>y)/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/(?<ab-cd>xx)/
Failed: error 142 at offset 5: syntax error in subpattern name (missing terminator?)
/(?'0abc'xx)/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/(?P<0abc>xx)/
Failed: error 144 at offset 4: subpattern name must start with a non-digit
/\k<5ghj>/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/\k'5ghj'/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/\k{2fgh}/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/(?P=8yuki)/
Failed: error 144 at offset 4: subpattern name must start with a non-digit
/\g{4df}/
Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/(?&1abc)xx(?<1abc>y)/
Failed: error 144 at offset 3: subpattern name must start with a non-digit
/(?P>1abc)xx(?<1abc>y)/
Failed: error 144 at offset 4: subpattern name must start with a non-digit
/\g'3gh'/
Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/\g<5fg>/
Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/(?(<4gh>)abc)/
Failed: error 144 at offset 4: subpattern name must start with a non-digit
/(?('4gh')abc)/
Failed: error 144 at offset 4: subpattern name must start with a non-digit
/(?(4gh)abc)/
Failed: error 124 at offset 4: missing closing parenthesis for condition
/(?(R&6yh)abc)/
Failed: error 144 at offset 5: subpattern name must start with a non-digit
/(((a\2)|(a*)\g<-1>))*a?/B
------------------------------------------------------------------
Bra
Brazero
SCBra 1
CBra 2
CBra 3
a
\2
Ket
Alt
CBra 4
a*
Ket
Recurse
Ket
KetRmax
a?+
Ket
End
------------------------------------------------------------------
# Test the ugly "start or end of word" compatibility syntax.
/[[:<:]]red[[:>:]]/B
------------------------------------------------------------------
Bra
\b
Assert
\w
Ket
red
\b
Assert back
Reverse
\w
Ket
Ket
End
------------------------------------------------------------------
little red riding hood
0: red
a /red/ thing
0: red
red is a colour
0: red
put it all on red
0: red
\= Expect no match
no reduction
No match
Alfred Winifred
No match
/[a[:<:]] should give error/
Failed: error 130 at offset 4: unknown POSIX class name
/(?=ab\K)/aftertext,allow_lookaround_bsk
abcd\=startchar
Start of matched string is beyond its end - displaying from end to start.
0: ab
0+ abcd
/abcd/newline=lf,firstline
\= Expect no match
xx\nxabcd
No match
# Test stack guard external calls.
/(((a)))/stackguard=1
Failed: error 133 at offset 7: parentheses are too deeply nested (stack check)
/(((a)))/stackguard=2
Failed: error 133 at offset 7: parentheses are too deeply nested (stack check)
/(((a)))/stackguard=3
/(((((a)))))/
# End stack guard tests
/^\w+(?>\s*)(?<=\w)/B
------------------------------------------------------------------
Bra
^
\w+
Once
\s*+
Ket
Assert back
Reverse
\w
Ket
Ket
End
------------------------------------------------------------------
/\othing/
Failed: error 155 at offset 2: missing opening brace after \o
/\o{}/
Failed: error 178 at offset 3: digits missing in \x{} or \o{} or \N{U+}
/\o{whatever}/
Failed: error 164 at offset 3: non-octal character in \o{} (closing brace missing?)
/\xthing/
/\x{}/
Failed: error 178 at offset 3: digits missing in \x{} or \o{} or \N{U+}
/\x{whatever}/
Failed: error 167 at offset 3: non-hex character in \x{} (closing brace missing?)
/A\8B/
Failed: error 115 at offset 2: reference to non-existent subpattern
/A\9B/
Failed: error 115 at offset 2: reference to non-existent subpattern
# This one is here because Perl fails to match "12" for this pattern when the $
# is present.
/^(?(?=abc)\w{3}:|\d\d)$/
abc:
0: abc:
12
0: 12
\= Expect no match
123
No match
xyz
No match
# Perl gets this one wrong, giving "a" as the after text for ca and failing to
# match for cd.
/(?(?=ab)ab)/aftertext
abxxx
0: ab
0+ xxx
ca
0:
0+ ca
cd
0:
0+ cd
# This should test both paths for processing OP_RECURSE.
/(?(R)a+|(?R)b)/
aaaabcde
0: aaaab
aaaabcde\=ovector=100
0: aaaab
/a*?b*?/
ab
0:
/(*NOTEMPTY)a*?b*?/
ab
0: a
ba
0: b
cb
0: b
/(*NOTEMPTY_ATSTART)a*?b*?/aftertext
ab
0: a
0+ b
cdab
0:
0+ dab
/(?(VERSION>=10.0)yes|no)/I
Capture group count = 0
Subject length lower bound = 2
yesno
0: yes
/(?(VERSION>=10.04)yes|no)/
yesno
0: yes
/(?(VERSION=8)yes){3}/BI,aftertext
------------------------------------------------------------------
Bra
Cond
Cond false
yes
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 0
May match empty string
Subject length lower bound = 0
yesno
0:
0+ yesno
/(?(VERSION=8)yes|no){3}/I
Capture group count = 0
Subject length lower bound = 6
yesnononoyes
0: nonono
\= Expect no match
yesno
No match
/(?:(?<VERSION>abc)|xyz)(?(VERSION)yes|no)/I
Capture group count = 1
Max back reference = 1
Named capture groups:
VERSION 1
Starting code units: a x
Subject length lower bound = 5
abcyes
0: abcyes
1: abc
xyzno
0: xyzno
\= Expect no match
abcno
No match
xyzyes
No match
/(?(VERSION<10)yes|no)/
Failed: error 179 at offset 10: syntax error or number too big in (?(VERSION condition
/(?(VERSION>10)yes|no)/
Failed: error 179 at offset 11: syntax error or number too big in (?(VERSION condition
/(?(VERSION>=10.0.0)yes|no)/
Failed: error 179 at offset 16: syntax error or number too big in (?(VERSION condition
/(?(VERSION=10.101)yes|no)/
Failed: error 179 at offset 16: syntax error or number too big in (?(VERSION condition
/abcd/I
Capture group count = 0
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
/abcd/I,no_start_optimize
Capture group count = 0
Options: no_start_optimize
/(|ab)*?d/I
Capture group count = 1
Starting code units: a d
Last code unit = 'd'
Subject length lower bound = 1
abd
0: abd
1: ab
xyd
0: d
/(|ab)*?d/I,no_start_optimize
Capture group count = 1
Options: no_start_optimize
abd
0: abd
1: ab
xyd
0: d
/\k<A>*(?<A>aa)(?<A>bb)/match_unset_backref,dupnames
aabb
0: aabb
1: aa
2: bb
/(((((a)))))/parens_nest_limit=2
Failed: error 119 at offset 3: parentheses are too deeply nested
/abc/replace=XYZ
123123
0: 123123
123abc123
1: 123XYZ123
123abc123abc123
1: 123XYZ123abc123
123123\=zero_terminate
0: 123123
123abc123\=zero_terminate
1: 123XYZ123
123abc123abc123\=zero_terminate
1: 123XYZ123abc123
/abc/g,replace=XYZ
123abc123
1: 123XYZ123
123abc123abc123
2: 123XYZ123XYZ123
/abc/replace=X$$Z
123abc123
1: 123X$Z123
/abc/g,replace=X$$Z
123abc123abc123
2: 123X$Z123X$Z123
/a(b)c(d)e/replace=X$1Y${2}Z
"abcde"
1: "XbYdZ"
/a(b)c(d)e/replace=X$1Y${2}Z,global
"abcde-abcde"
2: "XbYdZ-XbYdZ"
/a(?<ONE>b)c(?<TWO>d)e/replace=X$ONE+${TWO}Z
"abcde"
1: "Xb+dZ"
/a(?<ONE>b)c(?<TWO>d)e/g,replace=X$ONE+${TWO}Z
"abcde-abcde-"
2: "Xb+dZ-Xb+dZ-"
/abc/replace=a$++
123abc
Failed: error -35 at offset 2 in replacement: invalid replacement string
/abc/replace=a$bad
123abc
Failed: error -49 at offset 5 in replacement: unknown substring
/abc/replace=a${A234567890123456789_123456789012}z
123abc
Failed: error -49 at offset 36 in replacement: unknown substring
/abc/replace=a${A23456789012345678901234567890123}z
123abc
Failed: error -35 at offset 35 in replacement: invalid replacement string
/abc/replace=a${bcd
123abc
Failed: error -58 at offset 6 in replacement: expected closing curly bracket in replacement string
/abc/replace=a${b+d}z
123abc
Failed: error -58 at offset 4 in replacement: expected closing curly bracket in replacement string
/abc/replace=[10]XYZ
123abc123
1: 123XYZ123
/abc/replace=[9]XYZ
123abc123
Failed: error -48: no more memory
/abc/replace=xyz
1abc2\=partial_hard
Failed: error -34: bad option value
/abc/replace=xyz
123abc456
1: 123xyz456
123abc456\=replace=pqr
1: 123pqr456
123abc456abc789
1: 123xyz456abc789
123abc456abc789\=g
2: 123xyz456xyz789
/(?<=abc)(|def)/g,replace=<$0>
123abcxyzabcdef789abcpqr
4: 123abc<>xyzabc<><def>789abc<>pqr
/./replace=$0
a
1: a
/(.)(.)/replace=$2+$1
abc
1: b+ac
/(?<A>.)(?<B>.)/replace=$B+$A
abc
1: b+ac
/(.)(.)/g,replace=$2$1
abcdefgh
4: badcfehg
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=${*MARK}
apple lemon blackberry
3: pear orange strawberry
apple strudel
1: pear strudel
fruitless
0: fruitless
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/replace=${*MARK} sauce,
apple lemon blackberry
1: pear sauce lemon blackberry
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=<$*MARK>
apple lemon blackberry
3: <pear> <orange> <strawberry>
apple strudel
1: <pear> strudel
fruitless
0: fruitless
/(*:pear)apple/g,replace=${*MARKING}
apple lemon blackberry
Failed: error -35 at offset 11 in replacement: invalid replacement string
/(*:pear)apple/g,replace=${*MARK-time
apple lemon blackberry
Failed: error -58 at offset 7 in replacement: expected closing curly bracket in replacement string
/(*:pear)apple/g,replace=${*mark}
apple lemon blackberry
Failed: error -35 at offset 8 in replacement: invalid replacement string
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=<$*MARKET>
apple lemon blackberry
Failed: error -35 at offset 9 in replacement: invalid replacement string
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=[22]${*MARK}
apple lemon blackberry
Failed: error -48: no more memory
apple lemon blackberry\=substitute_overflow_length
Failed: error -48: no more memory: 23 code units are needed
/(*:pear)apple|(*:orange)lemon|(*:strawberry)blackberry/g,replace=[23]${*MARK}
apple lemon blackberry
3: pear orange strawberry
/abc/
123abc123\=replace=[9]XYZ
Failed: error -48: no more memory
123abc123\=substitute_overflow_length,replace=[9]XYZ
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[6]XYZ
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[1]XYZ
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[0]XYZ
Failed: error -48: no more memory: 10 code units are needed
/a(b)c/
123abc123\=replace=[9]x$1z
Failed: error -48: no more memory
123abc123\=substitute_overflow_length,replace=[9]x$1z
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[6]x$1z
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[1]x$1z
Failed: error -48: no more memory: 10 code units are needed
123abc123\=substitute_overflow_length,replace=[0]x$1z
Failed: error -48: no more memory: 10 code units are needed
"((?=(?(?=(?(?=(?(?=()))))))))"
a
0:
1:
2:
"(?(?=)==)(((((((((?=)))))))))"
\= Expect no match
a
No match
/(a)(b)|(c)/
XcX\=ovector=2,get=1,get=2,get=3,get=4,getall
Matched, but too many substrings
0: c
1: <unset>
Get substring 1 failed (-55): requested value is not set
Get substring 2 failed (-54): requested value is not available
Get substring 3 failed (-54): requested value is not available
Get substring 4 failed (-49): unknown substring
0L c
1L
/x(?=ab\K)/allow_lookaround_bsk
xab\=get=0
Start of matched string is beyond its end - displaying from end to start.
0: ab
0G (0)
xab\=copy=0
Start of matched string is beyond its end - displaying from end to start.
0: ab
0C (0)
xab\=getall
Start of matched string is beyond its end - displaying from end to start.
0: ab
0L
/(?<A>a)|(?<A>b)/dupnames
a\=ovector=1,copy=A,get=A,get=2
Matched, but too many substrings
0: a
Copy substring 'A' failed (-54): requested value is not available
Get substring 2 failed (-54): requested value is not available
Get substring 'A' failed (-54): requested value is not available
a\=ovector=2,copy=A,get=A,get=2
0: a
1: a
C a (1) A (non-unique)
Get substring 2 failed (-54): requested value is not available
G a (1) A (non-unique)
b\=ovector=2,copy=A,get=A,get=2
Matched, but too many substrings
0: b
1: <unset>
Copy substring 'A' failed (-55): requested value is not set
Get substring 2 failed (-54): requested value is not available
Get substring 'A' failed (-55): requested value is not set
/a(b)c(d)/
abc\=ph,copy=0,copy=1,getall
Partial match: abc
0C abc (3)
Copy substring 1 failed (-2): partial match
get substring list failed (-2): partial match
/^abc/info
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
/^abc/info,no_dotstar_anchor
Capture group count = 0
Compile options: no_dotstar_anchor
Overall options: anchored no_dotstar_anchor
First code unit = 'a'
Subject length lower bound = 3
/.*\d/info,auto_callout
Capture group count = 0
Options: auto_callout
First code unit at start or follows newline
Subject length lower bound = 1
\= Expect no match
aaa
--->aaa
+0 ^ .*
+2 ^ ^ \d
+2 ^ ^ \d
+2 ^^ \d
+2 ^ \d
No match
/.*\d/info,no_dotstar_anchor,auto_callout
Capture group count = 0
Options: auto_callout no_dotstar_anchor
Subject length lower bound = 1
\= Expect no match
aaa
--->aaa
+0 ^ .*
+2 ^ ^ \d
+2 ^ ^ \d
+2 ^^ \d
+2 ^ \d
+0 ^ .*
+2 ^ ^ \d
+2 ^^ \d
+2 ^ \d
+0 ^ .*
+2 ^^ \d
+2 ^ \d
No match
/.*\d/dotall,info
Capture group count = 0
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 1
/.*\d/dotall,no_dotstar_anchor,info
Capture group count = 0
Options: dotall no_dotstar_anchor
Subject length lower bound = 1
/(*NO_DOTSTAR_ANCHOR)(?s).*\d/info
Capture group count = 0
Compile options: <none>
Overall options: no_dotstar_anchor
Subject length lower bound = 1
'^(?:(a)|b)(?(1)A|B)'
aA123\=ovector=1
Matched, but too many substrings
0: aA
aA123\=ovector=2
0: aA
1: a
'^(?:(?<AA>a)|b)(?(<AA>)A|B)'
aA123\=ovector=1
Matched, but too many substrings
0: aA
aA123\=ovector=2
0: aA
1: a
'^(?<AA>)(?:(?<AA>a)|b)(?(<AA>)A|B)'dupnames
aA123\=ovector=1
Matched, but too many substrings
0: aA
aA123\=ovector=2
Matched, but too many substrings
0: aA
1:
aA123\=ovector=3
0: aA
1:
2: a
'^(?:(?<AA>X)|)(?:(?<AA>a)|b)\k{AA}'dupnames
aa123\=ovector=1
Matched, but too many substrings
0: aa
aa123\=ovector=2
Matched, but too many substrings
0: aa
1: <unset>
aa123\=ovector=3
0: aa
1: <unset>
2: a
/(?<N111>(?J)(?<N111>1(111111)11|)1|1|)(?(<N111>)1)/
/(?<N>(?J)(?<N>))(?-J)\k<N>/
# Quantifiers are not allowed on condition assertions, but are otherwise
# OK in conditions.
/(?(?=0)?)+/
Failed: error 109 at offset 7: quantifier does not follow a repeatable item
/(?(?=0)(?=00)?00765)/
00765
0: 00765
/(?(?=0)(?=00)?00765|(?!3).56)/
00765
0: 00765
456
0: 456
\= Expect no match
356
No match
'^(a)*+(\w)'
g
0: g
1: <unset>
2: g
g\=ovector=1
Matched, but too many substrings
0: g
'^(?:a)*+(\w)'
g
0: g
1: g
g\=ovector=1
Matched, but too many substrings
0: g
# These two pattern showeds up compile-time bugs
"((?2){0,1999}())?"
/((?+1)(\1))/B
------------------------------------------------------------------
Bra
CBra 1
Recurse
CBra 2
\1
Ket
Ket
Ket
End
------------------------------------------------------------------
# Callouts with string arguments
/a(?C"/
Failed: error 181 at offset 4: missing terminating delimiter for callout with string argument
/a(?C"a/
Failed: error 181 at offset 4: missing terminating delimiter for callout with string argument
/a(?C"a"/
Failed: error 139 at offset 7: closing parenthesis for (?C expected
/a(?C"a"bcde(?C"b")xyz/
Failed: error 139 at offset 7: closing parenthesis for (?C expected
/a(?C"a)b""c")/B
------------------------------------------------------------------
Bra
a
CalloutStr "a)b"c" 5 13 0
Ket
End
------------------------------------------------------------------
/ab(?C" any text with spaces ")cde/B
------------------------------------------------------------------
Bra
ab
CalloutStr " any text with spaces " 6 30 1
cde
Ket
End
------------------------------------------------------------------
abcde
Callout (6): " any text with spaces "
--->abcde
^ ^ c
0: abcde
12abcde
Callout (6): " any text with spaces "
--->12abcde
^ ^ c
0: abcde
/^a(b)c(?C1)def/
abcdef
--->abcdef
1 ^ ^ d
0: abcdef
1: b
/^a(b)c(?C"AB")def/
abcdef
Callout (10): "AB"
--->abcdef
^ ^ d
0: abcdef
1: b
/^a(b)c(?C1)def/
abcdef\=callout_capture
Callout 1: last capture = 1
1: b
--->abcdef
^ ^ d
0: abcdef
1: b
/^a(b)c(?C{AB})def/B
------------------------------------------------------------------
Bra
^
a
CBra 1
b
Ket
c
CalloutStr {AB} 10 14 1
def
Ket
End
------------------------------------------------------------------
abcdef\=callout_capture
Callout (10): {AB} last capture = 1
1: b
--->abcdef
^ ^ d
0: abcdef
1: b
/(?C`a``b`)(?C'a''b')(?C"a""b")(?C^a^^b^)(?C%a%%b%)(?C#a##b#)(?C$a$$b$)(?C{a}}b})/B,callout_info
------------------------------------------------------------------
Bra
CalloutStr `a`b` 4 10 0
CalloutStr 'a'b' 14 20 0
CalloutStr "a"b" 24 30 0
CalloutStr ^a^b^ 34 40 0
CalloutStr %a%b% 44 50 0
CalloutStr #a#b# 54 60 0
CalloutStr $a$b$ 64 70 0
CalloutStr {a}b} 74 80 0
Ket
End
------------------------------------------------------------------
Callout `a`b` (
Callout 'a'b' (
Callout "a"b" (
Callout ^a^b^ (
Callout %a%b% (
Callout #a#b# (
Callout $a$b$ (
Callout {a}b}
/(?:a(?C`code`)){3}/B
------------------------------------------------------------------
Bra
Bra
a
CalloutStr `code` 8 14 4
Ket
Bra
a
CalloutStr `code` 8 14 4
Ket
Bra
a
CalloutStr `code` 8 14 4
Ket
Ket
End
------------------------------------------------------------------
/^(?(?C25)(?=abc)abcd|xyz)/B,callout_info
------------------------------------------------------------------
Bra
^
Cond
Callout 25 9 3
Assert
abc
Ket
abcd
Alt
xyz
Ket
Ket
End
------------------------------------------------------------------
Callout 25 (?=
abcdefg
--->abcdefg
25 ^ (?=
0: abcd
xyz123
--->xyz123
25 ^ (?=
0: xyz
/^(?(?C$abc$)(?=abc)abcd|xyz)/B
------------------------------------------------------------------
Bra
^
Cond
CalloutStr $abc$ 7 12 3
Assert
abc
Ket
abcd
Alt
xyz
Ket
Ket
End
------------------------------------------------------------------
abcdefg
Callout (7): $abc$
--->abcdefg
^ (?=
0: abcd
xyz123
Callout (7): $abc$
--->xyz123
^ (?=
0: xyz
/^ab(?C'first')cd(?C"second")ef/
abcdefg
Callout (7): 'first'
--->abcdefg
^ ^ c
Callout (20): "second"
--->abcdefg
^ ^ e
0: abcdef
/(?:a(?C`code`)){3}X/
aaaXY
Callout (8): `code`
--->aaaXY
^^ ){3}
Callout (8): `code`
--->aaaXY
^ ^ ){3}
Callout (8): `code`
--->aaaXY
^ ^ ){3}
0: aaaX
# Binary zero in callout string
# a ( ? C ' x z ' ) b
/ 61 28 3f 43 27 78 00 7a 27 29 62/hex,callout_info
Callout 'x\x00z' b
abcdefgh
Callout (5): 'x\x00z'
--->abcdefgh
^^ b
0: ab
/(?(?!)^)/
/(?(?!)a|b)/
bbb
0: b
\= Expect no match
aaa
No match
# JIT gives a different error message for the infinite recursion
"(*NO_JIT)((?2)+)((?1)){"
abcd{
Failed: error -52: nested recursion at the same subject position
# Perl fails to diagnose the absence of an assertion
"(?(?<E>.*!.*)?)"
Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
"X((?2)()*+){2}+"B
------------------------------------------------------------------
Bra
X
Once
CBra 1
Recurse
Braposzero
SCBraPos 2
KetRpos
Ket
CBra 1
Recurse
Braposzero
SCBraPos 2
KetRpos
Ket
Ket
Ket
End
------------------------------------------------------------------
"X((?2)()*+){2}"B
------------------------------------------------------------------
Bra
X
CBra 1
Recurse
Braposzero
SCBraPos 2
KetRpos
Ket
CBra 1
Recurse
Braposzero
SCBraPos 2
KetRpos
Ket
Ket
End
------------------------------------------------------------------
/(?<=\bABQ(3(?-7)))/
Failed: error 115 at offset 15: reference to non-existent subpattern
/(?<=\bABQ(3(?+7)))/
Failed: error 115 at offset 15: reference to non-existent subpattern
";(?<=()((?3))((?2)))"
Failed: error 125 at offset 1: lookbehind assertion is not fixed length
# Perl loops on this (PCRE2 used to!)
/(?<=\Ka)/g,aftertext,allow_lookaround_bsk
aaaaa
0: a
0+ aaaa
0: a
0+ aaa
0: a
0+ aa
0: a
0+ a
0: a
0+
/(?<=\Ka)/altglobal,aftertext,allow_lookaround_bsk
aaaaa
0: a
0+ aaaa
0: a
0+ aaa
0: a
0+ aa
0: a
0+ a
0: a
0+
/((?2){73}(?2))((?1))/info
Capture group count = 2
May match empty string
Subject length lower bound = 0
/abc/
\= Expect no match
\[9x!xxx(]{9999}
No match
/(abc)*/
\[abc]{5}
0: abcabcabcabcabc
1: abc
/^/gm
\n\n\n
0:
0:
0:
/^/gm,alt_circumflex
\n\n\n
0:
0:
0:
0:
/((((((((x))))))))\81/
Failed: error 115 at offset 19: reference to non-existent subpattern
xx1
/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))\80/
xx
Matched, but too many substrings
0: xx
1: x
2: x
3: x
4: x
5: x
6: x
7: x
8: x
9: x
10: x
11: x
12: x
13: x
14: x
/\80/
Failed: error 115 at offset 2: reference to non-existent subpattern
/A\8B\9C/
Failed: error 115 at offset 2: reference to non-existent subpattern
A8B9C
/(?x:((?'a')) # comment (with parentheses) and | vertical
(?-x:#not a comment (?'b')) # this is a comment ()
(?'c')) # not a comment (?'d')/info
Capture group count = 5
Named capture groups:
a 2
b 3
c 4
d 5
First code unit = '#'
Last code unit = ' '
Subject length lower bound = 32
/(?|(?'a')(2)(?'b')|(?'a')(?'a')(3))/I,dupnames
Capture group count = 3
Named capture groups:
a 1
a 2
b 3
Options: dupnames
Starting code units: 2 3
Subject length lower bound = 1
A23B
0: 2
1:
2: 2
3:
B32A
0: 3
1:
2:
3: 3
# These are some patterns that used to cause buffer overflows or other errors
# while compiling.
/.((?2)(?R)|\1|$)()/B
------------------------------------------------------------------
Bra
Any
CBra 1
Recurse
Recurse
Alt
\1
Alt
$
Ket
CBra 2
Ket
Ket
End
------------------------------------------------------------------
/.((?3)(?R)()(?2)|\1|$)()/B
------------------------------------------------------------------
Bra
Any
CBra 1
Recurse
Recurse
CBra 2
Ket
Recurse
Alt
\1
Alt
$
Ket
CBra 3
Ket
Ket
End
------------------------------------------------------------------
/(\9*+(?2);\3++()2|)++{/
Failed: error 115 at offset 2: reference to non-existent subpattern
/\V\x85\9*+((?2)\3++()2)*:2/
Failed: error 115 at offset 7: reference to non-existent subpattern
/(((?(R)){0,2}) (?'x'((?'R')((?'R')))))/dupnames
/(((?(X)){0,2}) (?'x'((?'X')((?'X')))))/dupnames
/(((?(R)){0,2}) (?'x'((?'X')((?'R')))))/
"(?J)(?'d'(?'d'\g{d}))"
"(?=!((?2)(?))({8(?<=(?1){29}8bbbb\x16\xd\xc6^($(\xa9H4){4}h}?1)B))\x15')"
Failed: error 125 at offset 16: lookbehind assertion is not fixed length
/A(?'')Z/
Failed: error 162 at offset 4: subpattern name expected
"(?J:(?|(?'R')(\k'R')|((?'R'))))"
/(?<=|(\,\$(?73591620449005828816)\xa8.{7}){6}\x09)/
Failed: error 161 at offset 17: subpattern number is too big
/^(?:(?(1)x|)+)+$()/B
------------------------------------------------------------------
Bra
^
SBra
SCond
1 Cond ref
x
Alt
KetRmax
KetRmax
$
CBra 1
Ket
Ket
End
------------------------------------------------------------------
/[[:>:]](?<)/
Failed: error 162 at offset 10: subpattern name expected
/((?x)(*:0))#(?'/
Failed: error 162 at offset 15: subpattern name expected
/(?C$[$)(?<]/
Failed: error 162 at offset 10: subpattern name expected
/(?C$)$)(?<]/
Failed: error 162 at offset 10: subpattern name expected
/(?(R))*+/B
------------------------------------------------------------------
Bra
Braposzero
SBraPos
SCond
Cond recurse any
Ket
KetRpos
Ket
End
------------------------------------------------------------------
abcd
0:
/((?x)(?#))#(?'/
Failed: error 162 at offset 14: subpattern name expected
/((?x)(?#))#(?'abc')/I
Capture group count = 2
Named capture groups:
abc 2
First code unit = '#'
Subject length lower bound = 1
/[[:\\](?<[::]/
Failed: error 162 at offset 9: subpattern name expected
/[[:\\](?'abc')[a:]/I
Capture group count = 1
Named capture groups:
abc 1
Starting code units: : [ \
Subject length lower bound = 2
"[[[.\xe8Nq\xffq\xff\xe0\x2|||::Nq\xffq\xff\xe0\x6\x2|||::[[[:[::::::[[[[[::::::::[:[[[:[:::[[[[[[[[[[[[:::::::::::::::::[[.\xe8Nq\xffq\xff\xe0\x2|||::Nq\xffq\xff\xe0\x6\x2|||::[[[:[::::::[[[[[::::::::[:[[[:[:::[[[[[[[[[[[[[[:::E[[[:[:[[:[:::[[:::E[[[:[:[[:'[:::::E[[[:[::::::[[[:[[[[[[[::E[[[:[::::::[[[:[[[[[[[[:[[::[::::[[:::::::[[:[[[[[[[:[[::[:[[:[~"
Failed: error 106 at offset 353: missing terminating ] for character class
/()(?(R)0)*+/B
------------------------------------------------------------------
Bra
CBra 1
Ket
Braposzero
SBraPos
SCond
Cond recurse any
0
Ket
KetRpos
Ket
End
------------------------------------------------------------------
/(?R-:(?</
Failed: error 158 at offset 3: (?R (recursive pattern call) must be followed by a closing parenthesis
/(?R-:(?<)/
Failed: error 158 at offset 3: (?R (recursive pattern call) must be followed by a closing parenthesis
/(?(?C{\Q})(?!(?'/
Failed: error 162 at offset 16: subpattern name expected
/(?(?C{\Q})(?!(?'abc')))/I
Capture group count = 1
Named capture groups:
abc 1
May match empty string
Subject length lower bound = 0
/(?1){3918}(((((0(\k'R'))))(?J)(?'R'(?'R'\3){99})))/I
Capture group count = 8
Max back reference = 8
Named capture groups:
R 7
R 8
Duplicate name status changes
Last code unit = '0'
Subject length lower bound = 65535
/(?|(aaa)|(b))\g{1}/I
Capture group count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 1
/(?|(aaa)|(b))(?1)/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 4
/(?|(aaa)|(b))/I
Capture group count = 1
Starting code units: a b
Subject length lower bound = 1
/(?|(?'a'aaa)|(?'a'b))\k'a'/I
Capture group count = 1
Max back reference = 1
Named capture groups:
a 1
Starting code units: a b
Subject length lower bound = 1
/(?|(?'a'aaa)|(?'a'b))(?'a'cccc)\k'a'/I,dupnames
Capture group count = 2
Max back reference = 2
Named capture groups:
a 1
a 2
Options: dupnames
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 5
/ab{3cd/
ab{3cd
0: ab{3cd
/ab{3,cd/
ab{3,cd
0: ab{3,cd
/ab{3,4a}cd/
ab{3,4a}cd
0: ab{3,4a}cd
/{4,5a}bc/
{4,5a}bc
0: {4,5a}bc
/\x0{ab}/
\0{ab}
0: \x00{ab}
/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-02}Z/
ababababbbabZXXXX
0: ababababbbabZ
1: ab
2: b
/.*?a(*PRUNE)b/
aab
0: ab
/.*?a(*PRUNE)b/s
aab
0: ab
/^a(*PRUNE)b/s
\= Expect no match
aab
No match
/.*?a(*SKIP)b/
aab
0: ab
/(?(8000000000/
Failed: error 161 at offset 8: subpattern number is too big
/((?(R8000000000)))/
Failed: error 161 at offset 9: subpattern number is too big
/0(?0)|(1)(*THEN)(*SKIP:0)(*FAIL)/
\= Expect no match
01
No match
/(?(1)()\983040\2)/
Failed: error 161 at offset 14: subpattern number is too big
/(*LIMIT_MATCH=)abc/
Failed: error 160 at offset 14: (*VERB) not recognized or malformed
/(*CRLF)(*LIMIT_MATCH=)abc/
Failed: error 160 at offset 21: (*VERB) not recognized or malformed
/(?:ab)?(?:ab)(?:ab)/
abab
0: abab
ababab
0: ababab
\= Expect no match
aba
No match
/((*MARK:A))++a(*SKIP:B)b/
\= Expect no match
aacb
No match
/(*MARK:a\zb)z/alt_verbnames
Failed: error 140 at offset 10: invalid escape sequence in (*VERB) name
/(*:ab\t(d\)c)xxx/
Failed: error 122 at offset 12: unmatched closing parenthesis
/(*:ab\t(d\)c)xxx/alt_verbnames,mark
cxxxz
0: xxx
MK: ab\x09(d)c
/(*:A\Qxx)x\EB)x/alt_verbnames,mark
x
0: x
MK: Axx)xB
/(*:A\ExxxB)x/alt_verbnames,mark
x
0: x
MK: AxxxB
/(*: A \ and #comment
\ B)x/x,alt_verbnames,mark
x
0: x
MK: A and B
/(*: A \ and #comment
\ B)x/alt_verbnames,mark
x
0: x
MK: A and #comment\x0a B
/(*: A \ and #comment
\ B)x/x,mark
x
0: x
MK: A \ and #comment\x0a \ B
/(*: A \ and #comment
\ B)x/mark
x
0: x
MK: A \ and #comment\x0a \ B
/(*:A
B)x/alt_verbnames,mark
x
0: x
MK: A\x0aB
/(*:abc\Qpqr)/alt_verbnames
Failed: error 160 at offset 12: (*VERB) not recognized or malformed
/abc/use_offset_limit
1234abcde\=offset_limit=100
0: abc
1234abcde\=offset_limit=9
0: abc
1234abcde\=offset_limit=4
0: abc
1234abcde\=offset_limit=4,offset=4
0: abc
\= Expect no match
1234abcde\=offset_limit=4,offset=5
No match
1234abcde\=offset_limit=3
No match
/(?<=abc)/use_offset_limit
1234abc\=offset_limit=7
0:
\= Expect no match
1234abc\=offset_limit=6
No match
/A/g,replace=-,use_offset_limit
XAXAXAXAXA\=offset_limit=4
2: X-X-XAXAXA
/abc/
\= Expect error
1234abcde\=offset_limit=4
Failed: error -56: offset limit set without PCRE2_USE_OFFSET_LIMIT
/^\w/m,use_offset_limit
\n..\naa\=offset_limit=3
No match
\n..\naa\=offset_limit=4
0: a
/abcd/null_context
abcd\=null_context
0: abcd
\= Expect error - not allowed together
abcd\=null_context,find_limits
** Not allowed together: find_limits null_context
abcd\=allusedtext,startchar
** Not allowed together: allusedtext startchar
/abcd/replace=w\rx\x82y\o{333}z(\Q12\$34$$\x34\E5$$),substitute_extended
abcd
1: w\x0dx\x82y\xdbz(12\$34$$\x345$)
/abcd/replace=w\rx\x82y\o{333}z(\Q12\$34$$\x34\E5$$),substitute_extended,substitute_literal
>>abcd<<
1: >>w\rx\x82y\o{333}z(\Q12\$34$$\x34\E5$$)<<
/abcd/g,replace=\$1$2\,substitute_literal
XabcdYabcdZ
2: X\$1$2\Y\$1$2\Z
/a(bc)(DE)/replace=a\u$1\U$1\E$1\l$2\L$2\Eab\Uab\LYZ\EDone,substitute_extended
abcDE
1: aBcBCbcdEdeabAByzDone
/abcd/replace=xy\kz,substitute_extended
abcd
Failed: error -57 at offset 4 in replacement: bad escape sequence in replacement string
/a(?:(b)|(c))/substitute_extended,replace=X${1:+1:-1}X${2:+2:-2}
ab
1: X1X-2
ac
1: X-1X2
ab\=replace=${1:+$1\:$1:$2}
1: b:b
ac\=replace=${1:+$1\:$1:$2}
1: c
>>ac<<\=replace=${1:+$1\:$1:$2},substitute_literal
1: >>${1:+$1\:$1:$2}<<
/a(?:(b)|(c))/substitute_extended,replace=X${1:-1:-1}X${2:-2:-2}
ab
1: XbX2:-2
ac
1: X1:-1Xc
/(a)/substitute_extended,replace=>${1:+\Q$1:{}$$\E+\U$1}<
a
1: >$1:{}$$+A<
/X(b)Y/substitute_extended
XbY\=replace=x${1:+$1\U$1}y
1: xbBY
XbY\=replace=\Ux${1:+$1$1}y
1: XBBY
/a/substitute_extended,replace=${*MARK:+a:b}
a
Failed: error -58 at offset 7 in replacement: expected closing curly bracket in replacement string
/(abcd)/replace=${1:+xy\kz},substitute_extended
abcd
Failed: error -57 at offset 8 in replacement: bad escape sequence in replacement string
/(abcd)/
abcd\=replace=${1:+xy\kz},substitute_extended
Failed: error -57 at offset 8 in replacement: bad escape sequence in replacement string
/abcd/substitute_extended,replace=>$1<
abcd
Failed: error -49 at offset 3 in replacement: unknown substring
/abcd/substitute_extended,replace=>xxx${xyz}<<<
abcd
Failed: error -49 at offset 10 in replacement: unknown substring
/(?J)(?:(?<A>a)|(?<A>b))/replace=<$A>
[a]
1: [<a>]
[b]
1: [<b>]
\= Expect error
(a)\=ovector=1
Failed: error -54 at offset 3 in replacement: requested value is not available
/(a)|(b)/replace=<$1>
\= Expect error
b
Failed: error -55 at offset 3 in replacement: requested value is not set
/(aa)(BB)/substitute_extended,replace=\U$1\L$2\E$1..\U$1\l$2$1
aaBB
1: AAbbaa..AAbBaa
/abcd/replace=wxyz,substitute_matched
abcd
1: wxyz
pqrs
0: pqrs
/abcd/g
>abcd1234abcd5678<\=replace=wxyz,substitute_matched
2: >wxyz1234wxyz5678<
/^(o(\1{72}{\"{\\{00000059079}\d*){74}}){19}/I
Capture group count = 2
Max back reference = 1
Compile options: <none>
Overall options: anchored
First code unit = 'o'
Last code unit = '}'
Subject length lower bound = 65535
/((p(?'K/
Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator?)
/((p(?'K/no_auto_capture
Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator?)
/abc/replace=A$3123456789Z
abc
Failed: error -49 at offset 3 in replacement: unknown substring
/(?<!a{65535}a{5})x/I
Failed: error 187 at offset 0: lookbehind assertion is too long
/(?<!a{65535})x/I
Capture group count = 0
Max lookbehind = 65535
First code unit = 'x'
Subject length lower bound = 1
/(?=a\K)/replace=z,allow_lookaround_bsk
BaCaD
Failed: error -60: match with end before start or start moved backwards is not supported
/(?<=\K.)/g,replace=-,allow_lookaround_bsk
ab
Failed: error -60: match with end before start or start moved backwards is not supported
/(?'abcdefghijklmnopqrstuvwxyzABCDEFG'toolong)/
Failed: error 148 at offset 36: subpattern name is too long (maximum 32 code units)
/(?'abcdefghijklmnopqrstuvwxyzABCDEF'justright)/
# These two use zero-termination
/abcd/max_pattern_length=3
Failed: error 188 at offset 0: pattern string is longer than the limit set by the application
/abc/max_pattern_length=3
# These two, being hex, pass the length
/abcdefab/hex,max_pattern_length=3
Failed: error 188 at offset 0: pattern string is longer than the limit set by the application
/abcdef/hex,max_pattern_length=3
# These patterns used to take a long time to compile
"(.*)
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))"xI
Capture group count = 12
May match empty string
Options: extended
First code unit at start or follows newline
Subject length lower bound = 0
"(?<=a()
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
a)"xI
Capture group count = 12
Max lookbehind = 2
May match empty string
Options: extended
Subject length lower bound = 0
"(?|()|())(.*)
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))"xI
Capture group count = 13
May match empty string
Options: extended
Subject length lower bound = 0
"(?|()|())(?<=a()
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
((?-2)(?-2))((?-2)(?-2))((?-2)(?-2))
a)"xI
Failed: error 135 at offset 9: lookbehind is too complicated
# Test the use of malloc for caching group information when there are more
# groups than fit into the on-stack workspace.
/\[()]{1024}/I,expand
Expanded: ()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()
Capture group count = 1024
May match empty string
Subject length lower bound = 0
# Test minlength capped at 65535
/(A{65000})\1{65000}/I
Capture group count = 1
Max back reference = 1
First code unit = 'A'
Last code unit = 'A'
Subject length lower bound = 65535
# Test group scans when numbers are not unique
/(?|()+|(a)+)/BI
------------------------------------------------------------------
Bra
Bra
SCBra 1
KetRmax
Alt
CBra 1
a
KetRmax
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
May match empty string
Subject length lower bound = 0
/(?|(a)+|()+)/BI
------------------------------------------------------------------
Bra
Bra
CBra 1
a
KetRmax
Alt
SCBra 1
KetRmax
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
May match empty string
Subject length lower bound = 0
/(?|()|(a))/BI
------------------------------------------------------------------
Bra
Bra
CBra 1
Ket
Alt
CBra 1
a
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
May match empty string
Subject length lower bound = 0
/(?|(a)|())/BI
------------------------------------------------------------------
Bra
Bra
CBra 1
a
Ket
Alt
CBra 1
Ket
Ket
Ket
End
------------------------------------------------------------------
Capture group count = 1
May match empty string
Subject length lower bound = 0
# Test CRLF handling in empty string substitutions
/^$/gm,newline=anycrlf,replace=-
X\r\n\r\nY
1: X\x0d\x0a-\x0d\x0aY
/^$/gm,newline=crlf,replace=-
X\r\n\r\nY
1: X\x0d\x0a-\x0d\x0aY
/^$/gm,newline=any,replace=-
X\r\n\r\nY
1: X\x0d\x0a-\x0d\x0aY
"(*ANYCRLF)(?m)^(.*[^0-9\r\n].*|)$"g,replace=NaN
15\r\nfoo\r\n20\r\nbar\r\nbaz\r\n\r\n20
4: 15\x0d\x0aNaN\x0d\x0a20\x0d\x0aNaN\x0d\x0aNaN\x0d\x0aNaN\x0d\x0a20
/a[[:punct:]b]/bincode
------------------------------------------------------------------
Bra
a
[!-/:-@[-`b{-~]
Ket
End
------------------------------------------------------------------
/a[b[:punct:]]/bincode
------------------------------------------------------------------
Bra
a
[!-/:-@[-`b{-~]
Ket
End
------------------------------------------------------------------
/L(?#(|++<!(2)?/B
------------------------------------------------------------------
Bra
L?+
Ket
End
------------------------------------------------------------------
/L(?#(|++<!(2)?/B,no_auto_possess
------------------------------------------------------------------
Bra
L?
Ket
End
------------------------------------------------------------------
/L(?#(|++<!(2)?/B,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 14
L?+
Callout 255 14 0
Ket
End
------------------------------------------------------------------
/L(?#(|++<!(2)?/B,no_auto_possess,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 14
L?
Callout 255 14 0
Ket
End
------------------------------------------------------------------
/(A*)\E+/B,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
SCBra 1
Callout 255 1 2
A*
Callout 255 3 4
KetRmax
Callout 255 7 0
Ket
End
------------------------------------------------------------------
/()\Q\E*]/B,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 1
Brazero
SCBra 1
Callout 255 1 6
KetRmax
Callout 255 7 1
]
Callout 255 8 0
Ket
End
------------------------------------------------------------------
a[bc]d
--->a[bc]d
+0 ^ (
+1 ^ )\Q\E*
+7 ^ ]
+8 ^^ End of pattern
0: ]
1:
/\x8a+f|;T?(*:;.'?`(\xeap ){![^()!y*''C*(?';]{1;(\x08)/B,alt_verbnames,dupnames,extended
------------------------------------------------------------------
Bra
\x{8a}++
f
Alt
;
T?
*MARK ;.'?`(\x{ea}p
{!
[\x00- "-&+-:<->@-BD-xz-\xff] (neg)
{1;
CBra 1
\x08
Ket
Ket
End
------------------------------------------------------------------
# Tests for NULL characters in comments and verb "names" and callouts
# /A#B\x00C\x0aZ/
/41 23 42 00 43 0a 5a/Bx,hex
------------------------------------------------------------------
Bra
AZ
Ket
End
------------------------------------------------------------------
# /A+#B\x00C\x0a+/
/41 2b 23 42 00 43 0a 2b/Bx,hex
------------------------------------------------------------------
Bra
A++
Ket
End
------------------------------------------------------------------
# /A(*:B\x00W#X\00Y\x0aC)Z/
/41 28 2a 3a 42 00 57 23 58 00 59 0a 43 29 5a/Bx,hex,alt_verbnames
------------------------------------------------------------------
Bra
A
*MARK B\x{0}WC
Z
Ket
End
------------------------------------------------------------------
# /A(*:B\x00W#X\00Y\x0aC)Z/
/41 28 2a 3a 42 00 57 23 58 00 59 0a 43 29 5a/Bx,hex
------------------------------------------------------------------
Bra
A
*MARK B\x{0}W#X\x{0}Y\x{a}C
Z
Ket
End
------------------------------------------------------------------
# /A(?C{X\x00Y})B/
/41 28 3f 43 7b 58 00 59 7d 29 42/B,hex
------------------------------------------------------------------
Bra
A
CalloutStr {X\x{0}Y} 5 10 1
B
Ket
End
------------------------------------------------------------------
# /A(?#X\x00Y)B/
/41 28 3f 23 7b 00 7d 29 42/B,hex
------------------------------------------------------------------
Bra
AB
Ket
End
------------------------------------------------------------------
# Tests for leading comment in extended patterns
/ (?-x):?/extended
/ (?-x):?/extended
/0b 28 3f 2d 78 29 3a/hex,extended
/#comment
(?-x):?/extended
/(8(*:6^\x09x\xa6l\)6!|\xd0:[^:|)\x09d\Z\d{85*m(?'(?<1!)*\W[*\xff]!!h\w]*\xbe;/alt_bsux,alt_verbnames,allow_empty_class,dollar_endonly,extended,multiline,never_utf,no_dotstar_anchor,no_start_optimize
Failed: error 162 at offset 49: subpattern name expected
/a|(b)c/replace=>$1<,substitute_unset_empty
cat
1: c><t
xbcom
1: x>b<om
/a|(b)c/
cat\=replace=>$1<
Failed: error -55 at offset 3 in replacement: requested value is not set
cat\=replace=>$1<,substitute_unset_empty
1: c><t
xbcom\=replace=>$1<,substitute_unset_empty
1: x>b<om
/a|(b)c/substitute_extended
cat\=replace=>${2:-xx}<
Failed: error -49 at offset 9 in replacement: unknown substring
cat\=replace=>${2:-xx}<,substitute_unknown_unset
1: c>xx<t
cat\=replace=>${X:-xx}<,substitute_unknown_unset
1: c>xx<t
/a|(?'X'b)c/replace=>$X<,substitute_unset_empty
cat
1: c><t
xbcom
1: x>b<om
/a|(?'X'b)c/replace=>$Y<,substitute_unset_empty
cat
Failed: error -49 at offset 3 in replacement: unknown substring
cat\=substitute_unknown_unset
1: c><t
cat\=substitute_unknown_unset,-substitute_unset_empty
Failed: error -55 at offset 3 in replacement: requested value is not set
/a|(b)c/replace=>$2<,substitute_unset_empty
cat
Failed: error -49 at offset 3 in replacement: unknown substring
cat\=substitute_unknown_unset
1: c><t
cat\=substitute_unknown_unset,-substitute_unset_empty
Failed: error -55 at offset 3 in replacement: requested value is not set
/()()()/use_offset_limit
\=ovector=11000000000
** Invalid value in 'ovector=11000000000'
\=callout_fail=11000000000
** Invalid value in 'callout_fail=11000000000'
\=callout_fail=1:11000000000
** Invalid value in 'callout_fail=1:11000000000'
\=callout_data=11000000000
** Invalid value in 'callout_data=11000000000'
\=callout_data=-11000000000
** Invalid value in 'callout_data=-11000000000'
\=offset_limit=1100000000000000000000
** Invalid value in 'offset_limit=1100000000000000000000'
\=copy=11000000000
** Invalid value in 'copy=11000000000'
/(*MARK:A\x00b)/mark
abc
0:
MK: A\x00b
/(*MARK:A\x00b)/mark,alt_verbnames
abc
0:
MK: A\x00b
/"(*MARK:A" 00 "b)"/mark,hex
abc
0:
MK: A\x00b
/"(*MARK:A" 00 "b)"/mark,hex,alt_verbnames
abc
0:
MK: A\x00b
/efg/hex
** Unexpected non-hex-digit 'g' at offset 2 in hex pattern: quote missing?
/eff/hex
** Odd number of digits in hex pattern
/effg/hex
** Unexpected non-hex-digit 'g' at offset 3 in hex pattern: quote missing?
/(?J)(?'a'))(?'a')/
Failed: error 122 at offset 10: unmatched closing parenthesis
/(?<=((?C)0))/
9010
--->9010
0 ^ 0
0 ^ 0
0:
1: 0
\= Expect no match
abc
--->abc
0 ^ 0
0 ^ 0
0 ^ 0
No match
/aaa/
\[abc]{10000000000000000000000000000}
** Repeat count too large
\[a]{3}
0: aaa
/\[AB]{6000000000000000000000}/expand
** Pattern repeat count too large
# Hex uses pattern length, not zero-terminated. This tests for overrunning
# the given length of a pattern.
/'(*U'/hex
Failed: error 160 at offset 3: (*VERB) not recognized or malformed
/'(*'/hex
Failed: error 109 at offset 1: quantifier does not follow a repeatable item
/'('/hex
Failed: error 114 at offset 1: missing closing parenthesis
//hex
# These tests are here because Perl never allows a back reference in a
# lookbehind. PCRE2 supports some limited cases.
/([ab])...(?<=\1)z/
a11az
0: a11az
1: a
b11bz
0: b11bz
1: b
\= Expect no match
b11az
No match
/(?|([ab]))...(?<=\1)z/
Failed: error 125 at offset 13: lookbehind assertion is not fixed length
/([ab])(\1)...(?<=\2)z/
aa11az
0: aa11az
1: a
2: a
/(a\2)(b\1)(?<=\2)/
Failed: error 125 at offset 10: lookbehind assertion is not fixed length
/(?<A>[ab])...(?<=\k'A')z/
a11az
0: a11az
1: a
b11bz
0: b11bz
1: b
\= Expect no match
b11az
No match
/(?<A>[ab])...(?<=\k'A')(?<A>)z/dupnames
Failed: error 125 at offset 13: lookbehind assertion is not fixed length
# Perl does not support \g+n
/((\g+1X)?([ab]))+/
aaXbbXa
0: aaXbbXa
1: bXa
2: bX
3: a
/ab(?C1)c/auto_callout
abc
--->abc
+0 ^ a
+1 ^^ b
1 ^ ^ c
+8 ^ ^ End of pattern
0: abc
/'ab(?C1)c'/hex,auto_callout
abc
--->abc
+0 ^ a
+1 ^^ b
1 ^ ^ c
+8 ^ ^ End of pattern
0: abc
# Perl accepts these, but gives a warning. We can't warn, so give an error.
/[a-[:digit:]]+/
Failed: error 150 at offset 4: invalid range in character class
a-a9-a
/[A-[:digit:]]+/
Failed: error 150 at offset 4: invalid range in character class
A-A9-A
/[a-\d]+/
Failed: error 150 at offset 5: invalid range in character class
a-a9-a
/(?<RA>abc)(?(R)xyz)/B
------------------------------------------------------------------
Bra
CBra 1
abc
Ket
Cond
Cond recurse any
xyz
Ket
Ket
End
------------------------------------------------------------------
/(?<R>abc)(?(R)xyz)/B
------------------------------------------------------------------
Bra
CBra 1
abc
Ket
Cond
1 Cond ref
xyz
Ket
Ket
End
------------------------------------------------------------------
/(?=.*[A-Z])/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
/()(?<=(?0))/
Failed: error 125 at offset 2: lookbehind assertion is not fixed length
/(?<!|!(?<!))/
/(?<!|!|!||||||(?<!)||(?<!)!|!||(?<!)!|!(?<!)!|!|!|!||||!!|<!)!|!||||!|/
/{2,2{2,2/use_length
/.>*?\g'0/use_length
Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/.>*?\g'0/
Failed: error 157 at offset 6: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/{<7B>̈́<EFBFBD>̈́<EFBFBD>{'{22{2{{2{'{22{{22{2{'{22{2{{2{{222{{2{'{22{2{22{2{'{22{2{{2{'{22{2{22{2{'{'{22{2{22{2{'{22{2{{2{'{22{2{22{2{'{222{2Ą̈́<C484>̈́<EFBFBD>{'{22{2{{2{'{22{{11{2{'{22{2{{2{{'{22{2{{2{'{22{{22{1{'{22{2{{2{{222{{2{'{22{2{22{2{'{/auto_callout
//
\=get=i00000000000000000000000000000000
** Group name in 'get' is too long
\=get=i2345678901234567890123456789012,get=i1245678901234567890123456789012
** Too many characters in named 'get' modifiers
"(?(?C))"
Failed: error 128 at offset 6: assertion expected after (?( or (?(?C)
/(?(?(?(?(?(?))))))/
Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
/(?<=(?1))((?s))/anchored
/(*:ab)*/
Failed: error 109 at offset 6: quantifier does not follow a repeatable item
%(*:(:(svvvvvvvvvv:]*[ Z!*;[]*[^[]*!^[+.+{{2,7}' _\\\\\\\\\\\\\)?.:.. *w////\\\Q\\\\\\\\\\\\\\\T\\\\\+/?/////'+\\\EEE?/////'+/*+/[^K]?]//(w)%never_backslash_c,alt_verbnames,auto_callout
/./newline=crlf
\=ph
No match
/(\x0e00\000000\xc)/replace=\P,substitute_extended
\x0e00\000000\xc
Failed: error -57 at offset 2 in replacement: bad escape sequence in replacement string
//replace=0
\=offset=7
Failed: error -33: bad offset value
/(?<=\G.)/g,replace=+
abc
3: a+b+c+
".+\QX\E+"B,no_auto_possess
------------------------------------------------------------------
Bra
Any+
X+
Ket
End
------------------------------------------------------------------
".+\QX\E+"B,auto_callout,no_auto_possess
------------------------------------------------------------------
Bra
Callout 255 0 4
Any+
Callout 255 4 4
X+
Callout 255 8 0
Ket
End
------------------------------------------------------------------
# This one is here because Perl gives an 'unmatched )' error which goes away
# if one of the \) sequences is removed - which is weird. PCRE finds it too
# complicated to find a minimum matching length.
"()X|((((((((()))))))((((())))))\2())((((((\2\2)))\2)(\22((((\2\2)2))\2)))(2\ZZZ)+:)Z^|91ZiZZnter(ZZ |91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z+:)Z|91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z((Z*(\2(Z\':))\0)i|||||||||||||||loZ\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0nte!rnal errpr\2\\21r(2\ZZZ)+:)Z!|91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0(2\ZZZ)+:)Z^|91ZiZZnter(ZZ |91Z(ZZ ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \)\0(2\ZZZ)+:)Z^)))int \)\0(2\ZZZ)+:)Z^|91ZiZZnter(ZZernZal ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)2))\2Z)))int \))\ZZ(\r2Z( or#(\Z2(Z\Z(\2\2)2))\2Z)Z(\22Z((\Z2(Z\Z(\2\2)))\2))))((((((\2\2))))))"I
Capture group count = 108
Max back reference = 22
Contains explicit CR or LF match
Subject length lower bound = 1
# This checks that new code for handling groups that may match an empty string
# works on a very large number of alternatives. This pattern used to provoke a
# complaint that it was too complicated.
/(?:\[A|B|C|D|E|F|G|H|I|J|]{200}Z)/expand
# This one used to compile rubbish instead of a compile error, and then
# behave unpredictably at match time.
/.+(?(?C'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'))?!XXXX.=X/
Failed: error 128 at offset 63: assertion expected after (?( or (?(?C)
.+(?(?C'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'))?!XXXX.=X
/[:[:alnum:]-[[a:lnum:]+/
Failed: error 150 at offset 11: invalid range in character class
/((?(?C'')\QX\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
Failed: error 128 at offset 11: assertion expected after (?( or (?(?C)
/((?(?C'')\Q\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
/abcd/auto_callout
abcd\=callout_error=255:2
--->abcd
+0 ^ a
+1 ^^ b
Failed: error -37: callout error code
/()(\g+65534)/
Failed: error 161 at offset 11: subpattern number is too big
/()(\g+65533)/
Failed: error 115 at offset 10: reference to non-existent subpattern
/<2F>\x00\x00\x00<17>(\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\2*\x00k\d+\x00‎\x00\x00\x00\x00\x00\2*\x00\x00\1*.){36}int^\x00\x00<08><>\x00<30>(\1{50779}?)J\w2/I
Capture group count = 2
Max back reference = 2
First code unit = \xc1
Last code unit = '2'
Subject length lower bound = 65535
/(a)(b)\2\1\1\1\1/I
Capture group count = 2
Max back reference = 2
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 7
/(?<a>a)(?<b>b)\g{b}\g{a}\g{a}\g{a}\g{a}(?<a>xx)(?<b>zz)/I,dupnames
Capture group count = 4
Max back reference = 4
Named capture groups:
a 1
a 3
b 2
b 4
Options: dupnames
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 11
//
\=ovector=7777777777
** Invalid value in 'ovector=7777777777'
# This is here because Perl matches, even though a COMMIT is encountered
# outside of the recursion.
/(?1)(A(*COMMIT)|B)D/
BAXBAD
No match
"(?1){2}(a)"B
------------------------------------------------------------------
Bra
Recurse
Recurse
CBra 1
a
Ket
Ket
End
------------------------------------------------------------------
"(?1){2,4}(a)"B
------------------------------------------------------------------
Bra
Recurse
Recurse
Brazero
Bra
Bra
Recurse
Ket
Brazero
Bra
Recurse
Ket
Ket
CBra 1
a
Ket
Ket
End
------------------------------------------------------------------
# This test differs from Perl for the first subject. Perl ends up with
# $1 set to 'B'; PCRE2 has it unset (which I think is right).
/^(?:
(?:A| (?:B|B(*ACCEPT)) (?<=(.)) D)
(Z)
)+$/x
AZB
0: AZB
1: <unset>
2: Z
AZBDZ
0: AZBDZ
1: B
2: Z
# The first of these, when run by Perl, gives the mark 'aa', which is wrong.
'(?>a(*:aa))b|ac' mark
ac
0: ac
'(?:a(*:aa))b|ac' mark
ac
0: ac
/(R?){65}/
(R?){65}
0:
1:
/\[(a)]{60}/expand
aaaa
No match
/(?<!\1((?U)1((?U))))(*F)/never_backslash_c,alt_bsux,anchored,extended
/\g{3/
Failed: error 157 at offset 2: \g is not followed by a braced, angle-bracketed, or quoted name/number or by a plain number
/(a(?C1)(b)(c)d)+/
abcdabcd\=callout_capture
Callout 1: last capture = 0
--->abcdabcd
^^ (
Callout 1: last capture = 1
1: abcd
2: b
3: c
--->abcdabcd
^ ^ (
0: abcdabcd
1: abcd
2: b
3: c
# Perl matches this one, but PCRE does not because (*ACCEPT) clears out any
# pending backtracks in the recursion.
/^ (?(DEFINE) (..(*ACCEPT)|...) ) (?1)$/x
\= Expect no match
abc
No match
# Perl gives no match for this one
/(a(*MARK:m)(*ACCEPT)){0}(?1)/mark
abc
0: a
MK: m
/abc/endanchored
xyzabc
0: abc
\= Expect no match
xyzabcdef
No match
\= Expect error
xyzabc\=ph
Failed: error -34: bad option value
/abc/
xyzabc\=endanchored
0: abc
\= Expect no match
xyzabcdef\=endanchored
No match
\= Expect error
xyzabc\=ps,endanchored
Failed: error -34: bad option value
/abc(*ACCEPT)d/endanchored
xyzabc
0: abc
\= Expect no match
xyzabcdef
No match
/abc|bcd/endanchored
xyzabcd
0: bcd
\= Expect no match
xyzabcdef
No match
/a(*ACCEPT)x|aa/endanchored
aaa
0: a
# Check auto-anchoring when there is a group that is never obeyed at
# the start of a branch.
/(?(DEFINE)(a))^bc/I
Capture group count = 1
Compile options: <none>
Overall options: anchored
First code unit = 'b'
Subject length lower bound = 2
/(a){0}.*bc/sI
Capture group count = 1
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'c'
Subject length lower bound = 2
# This should be anchored, as the condition is always false and there is
# no alternative branch.
/(?(VERSION>=999)yes)^bc/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
# This should not be anchored.
/(?(VERSION>=999)yes|no)^bc/I
Capture group count = 0
Last code unit = 'c'
Subject length lower bound = 4
/(*LIMIT_HEAP=0)xxx/I
Capture group count = 0
Heap limit = 0
First code unit = 'x'
Last code unit = 'x'
Subject length lower bound = 3
/\d{0,3}(*:abc)(?C1)xxx/callout_info
Callout 1 x
# ----------------------------------------------------------------------
# These are a whole pile of tests that touch lines of code that are not
# used by any other tests (at least when these were created).
/^a+?x/i,no_start_optimize,no_auto_possess
\= Expect no match
aaa
No match
/^[^a]{3,}?x/i,no_start_optimize,no_auto_possess
\= Expect no match
bbb
No match
cc
No match
/^X\S/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\W/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\H/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\h/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\V/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\v/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\h/no_start_optimize,no_auto_possess
\= Expect no match
XY
No match
/^X\V/no_start_optimize,no_auto_possess
\= Expect no match
X\n
No match
/^X\v/no_start_optimize,no_auto_possess
\= Expect no match
XX
No match
/^X.+?/s,no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\R+?/no_start_optimize,no_auto_possess
\= Expect no match
XX
No match
/^X\H+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\h+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
/^X\V+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
X\n
No match
/^X\D+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
X9
No match
/^X\S+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
X\n
No match
/^X\W+?/no_start_optimize,no_auto_possess
\= Expect no match
X
No match
XX
No match
/^X.+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\n
No match
/(*CRLF)^X.+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\r\=ps
Partial match: XY\x0d
/^X\R+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X\nX
No match
X\n\r\n
No match
X\n\rY
No match
X\n\nY
No match
X\n\x{0c}Y
No match
/(*BSR_ANYCRLF)^X\R+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X\nX
No match
X\n\r\n
No match
X\n\rY
No match
X\n\nY
No match
X\n\x{0c}Y
No match
/^X\H+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\t
No match
XYY
No match
/^X\h+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X\t\t
No match
X\tY
No match
/^X\V+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\n
No match
XYY
No match
/^X\v+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X\n\n
No match
X\nY
No match
/^X\D+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY9
No match
XYY
No match
/^X\d+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X99
No match
X9Y
No match
/^X\S+?Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\n
No match
XYY
No match
/^X\s+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X\n\n
No match
X\nY
No match
/^X\W+?Z/no_start_optimize,no_auto_possess
\= Expect no match
X.A
No match
X++
No match
/^X\w+?Z/no_start_optimize,no_auto_possess
\= Expect no match
Xa.
No match
Xaa
No match
/^X.{1,3}Z/s,no_start_optimize,no_auto_possess
\= Expect no match
Xa.bd
No match
/^X\h+Z/no_start_optimize,no_auto_possess
\= Expect no match
X\t\t
No match
X\tY
No match
/^X\V+Z/no_start_optimize,no_auto_possess
\= Expect no match
XY\n
No match
XYY
No match
/^(X(*THEN)Y|AB){0}(?1)/
ABX
0: AB
\= Expect no match
XAB
No match
/^(?!A(?C1)B)C/
ABC\=callout_error=1,no_jit
No match
/^(?!A(?C1)B)C/no_start_optimize
ABC\=callout_error=1
--->ABC
1 ^^ B
Failed: error -37: callout error code
/^(?(?!A(?C1)B)C)/
ABC\=callout_error=1
--->ABC
1 ^^ B
Failed: error -37: callout error code
# ----------------------------------------------------------------------
/[a b c]/BxxI
------------------------------------------------------------------
Bra
[a-c]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: extended_more
Starting code units: a b c
Subject length lower bound = 1
/[a b c]/BxxxI
------------------------------------------------------------------
Bra
[a-c]
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: extended extended_more
Starting code units: a b c
Subject length lower bound = 1
/[a b c]/B,extended_more
------------------------------------------------------------------
Bra
[a-c]
Ket
End
------------------------------------------------------------------
/[ a b c ]/B,extended_more
------------------------------------------------------------------
Bra
[a-c]
Ket
End
------------------------------------------------------------------
/[a b](?xx: [ 12 ] (?-xx:[ 34 ]) )y z/B
------------------------------------------------------------------
Bra
[ ab]
Bra
[12]
Bra
[ 34]
Ket
Ket
y z
Ket
End
------------------------------------------------------------------
# Unsetting /x also unsets /xx
/[a b](?xx: [ 12 ] (?-x:[ 34 ]) )y z/B
------------------------------------------------------------------
Bra
[ ab]
Bra
[12]
Bra
[ 34]
Ket
Ket
y z
Ket
End
------------------------------------------------------------------
/(a)(?-n:(b))(c)/nB
------------------------------------------------------------------
Bra
Bra
a
Ket
Bra
CBra 1
b
Ket
Ket
Bra
c
Ket
Ket
End
------------------------------------------------------------------
# ----------------------------------------------------------------------
# These test the dangerous PCRE2_EXTRA_BAD_ESCAPE_IS_LITERAL option.
/\j\x{z}\o{82}\L\uabcd\u\U\g{\g/B,\bad_escape_is_literal
** Unrecognized modifier '\' in '\bad_escape_is_literal'
/\N{\c/IB,bad_escape_is_literal
------------------------------------------------------------------
Bra
N{c
Ket
End
------------------------------------------------------------------
Capture group count = 0
Extra options: bad_escape_is_literal
First code unit = 'N'
Last code unit = 'c'
Subject length lower bound = 3
/[\j\x{z}\o\gAb\g]/B,bad_escape_is_literal
------------------------------------------------------------------
Bra
[Abgjoxz{}]
Ket
End
------------------------------------------------------------------
/[Q-\N]/B,bad_escape_is_literal
Failed: error 150 at offset 5: invalid range in character class
/[\s-_]/bad_escape_is_literal
Failed: error 150 at offset 3: invalid range in character class
/[_-\s]/bad_escape_is_literal
Failed: error 150 at offset 5: invalid range in character class
/[\B\R\X]/B
Failed: error 107 at offset 2: escape sequence is invalid in character class
/[\B\R\X]/B,bad_escape_is_literal
Failed: error 107 at offset 2: escape sequence is invalid in character class
/[A-\BP-\RV-\X]/B
Failed: error 107 at offset 4: escape sequence is invalid in character class
/[A-\BP-\RV-\X]/B,bad_escape_is_literal
Failed: error 107 at offset 4: escape sequence is invalid in character class
# ----------------------------------------------------------------------
/a\b(c/literal
a\\b(c
0: a\b(c
/a\b(c/literal,caseless
a\\b(c
0: a\b(c
a\\B(c
0: a\B(c
/a\b(c/literal,firstline
XYYa\\b(c
0: a\b(c
\= Expect no match
X\na\\b(c
No match
/a\b?c/literal,use_offset_limit
XXXXa\\b?c\=offset_limit=4
0: a\b?c
\= Expect no match
XXXXa\\b?c\=offset_limit=3
No match
/a\b(c/literal,anchored,endanchored
a\\b(c
0: a\b(c
\= Expect no match
Xa\\b(c
No match
a\\b(cX
No match
Xa\\b(cX
No match
//literal,extended
Failed: error 192 at offset 0: invalid option bits with PCRE2_LITERAL
/a\b(c/literal,auto_callout,no_start_optimize
XXXXa\\b(c
--->XXXXa\b(c
+0 ^ a
+0 ^ a
+0 ^ a
+0 ^ a
+0 ^ a
+1 ^^ \
+2 ^ ^ b
+3 ^ ^ (
+4 ^ ^ c
+5 ^ ^ End of pattern
0: a\b(c
/a\b(c/literal,auto_callout
XXXXa\\b(c
--->XXXXa\b(c
+0 ^ a
+1 ^^ \
+2 ^ ^ b
+3 ^ ^ (
+4 ^ ^ c
+5 ^ ^ End of pattern
0: a\b(c
/(*CR)abc/literal
(*CR)abc
0: (*CR)abc
/cat|dog/I,match_word
Capture group count = 0
Max lookbehind = 1
Extra options: match_word
Starting code units: c d
Subject length lower bound = 3
the cat sat
0: cat
\= Expect no match
caterpillar
No match
snowcat
No match
syndicate
No match
/(cat)|dog/I,match_line,literal
Capture group count = 0
Compile options: literal
Overall options: anchored literal
Extra options: match_line
First code unit = '('
Subject length lower bound = 9
(cat)|dog
0: (cat)|dog
\= Expect no match
the cat sat
No match
caterpillar
No match
snowcat
No match
syndicate
No match
/a whole line/match_line,multiline
Rhubarb \na whole line\n custard
0: a whole line
\= Expect no match
Not a whole line
No match
# Perl gets this wrong, failing to capture 'b' in group 1.
/^(b+|a){1,2}?bc/
bbc
0: bbc
1: b
# And again here, for the "babc" subject string.
/^(b*|ba){1,2}?bc/
babc
0: babc
1: ba
bbabc
0: bbabc
1: ba
bababc
0: bababc
1: ba
\= Expect no match
bababbc
No match
babababc
No match
/[[:digit:]-a]/
Failed: error 150 at offset 10: invalid range in character class
/[[:digit:]-[:print:]]/
Failed: error 150 at offset 10: invalid range in character class
/[\d-a]/
Failed: error 150 at offset 3: invalid range in character class
/[\H-z]/
Failed: error 150 at offset 3: invalid range in character class
/[\d-[:print:]]/
Failed: error 150 at offset 3: invalid range in character class
# Perl gets the second of these wrong, giving no match.
"(?<=(a))\1?b"I
Capture group count = 1
Max back reference = 1
Max lookbehind = 1
Last code unit = 'b'
Subject length lower bound = 1
ab
0: b
1: a
aaab
0: ab
1: a
"(?=(a))\1?b"I
Capture group count = 1
Max back reference = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
ab
0: ab
1: a
aaab
0: ab
1: a
# JIT does not support callout_extra
/(*NO_JIT)(a+)b/auto_callout,no_start_optimize,no_auto_possess
\= Expect no match
aac\=callout_extra
New match attempt
--->aac
+9 ^ (
+10 ^ a+
+12 ^ ^ )
+13 ^ ^ b
Backtrack
--->aac
+12 ^^ )
+13 ^^ b
Backtrack
No other matching paths
New match attempt
--->aac
+9 ^ (
+10 ^ a+
+12 ^^ )
+13 ^^ b
Backtrack
No other matching paths
New match attempt
--->aac
+9 ^ (
+10 ^ a+
Backtrack
No other matching paths
New match attempt
--->aac
+9 ^ (
+10 ^ a+
No match
/(*NO_JIT)a+(?C'XXX')b/no_start_optimize,no_auto_possess
\= Expect no match
aac\=callout_extra
New match attempt
Callout (15): 'XXX'
--->aac
^ ^ b
Backtrack
Callout (15): 'XXX'
--->aac
^^ b
Backtrack
No other matching paths
New match attempt
Callout (15): 'XXX'
--->aac
^^ b
No match
/\n/firstline
xyz\nabc
0: \x0a
/\nabc/firstline
xyz\nabc
0: \x0aabc
/\x{0a}abc/firstline,newline=crlf
\= Expect no match
xyz\r\nabc
No match
/[abc]/firstline
\= Expect no match
\na
No match
# These tests are matched in test 1 as they are Perl compatible. Here we are
# looking at what does and does not get auto-possessified.
/(?(DEFINE)(?<optional_a>a?))^(?&optional_a)a$/B
------------------------------------------------------------------
Bra
Cond
Cond false
CBra 1
a?
Ket
Ket
^
Recurse
a
$
Ket
End
------------------------------------------------------------------
/(?(DEFINE)(?<optional_a>a?)X)^(?&optional_a)a$/B
------------------------------------------------------------------
Bra
Cond
Cond false
CBra 1
a?
Ket
X
Ket
^
Recurse
a
$
Ket
End
------------------------------------------------------------------
/^(a?)b(?1)a/B
------------------------------------------------------------------
Bra
^
CBra 1
a?
Ket
b
Recurse
a
Ket
End
------------------------------------------------------------------
/^(a?)+b(?1)a/B
------------------------------------------------------------------
Bra
^
SCBra 1
a?
KetRmax
b
Recurse
a
Ket
End
------------------------------------------------------------------
/^(a?)++b(?1)a/B
------------------------------------------------------------------
Bra
^
SCBraPos 1
a?
KetRpos
b
Recurse
a
Ket
End
------------------------------------------------------------------
/^(a?)+b/B
------------------------------------------------------------------
Bra
^
SCBra 1
a?
KetRmax
b
Ket
End
------------------------------------------------------------------
/(?=a+)a(a+)++b/B
------------------------------------------------------------------
Bra
Assert
a++
Ket
a
CBraPos 1
a++
KetRpos
b
Ket
End
------------------------------------------------------------------
/(?<=(?=.){4,5}x)/B
------------------------------------------------------------------
Bra
Assert back
Reverse
Assert
Any
Ket
Assert
Any
Ket
Assert
Any
Ket
Assert
Any
Ket
Brazero
Assert
Any
Ket
x
Ket
Ket
End
------------------------------------------------------------------
# Perl behaves differently with these when optimization is turned off
/a(*PRUNE:X)bc|qq/mark,no_start_optimize
\= Expect no match
axy
No match, mark = X
/a(*THEN:X)bc|qq/mark,no_start_optimize
\= Expect no match
axy
No match, mark = X
/(?^x-i)AB/
Failed: error 194 at offset 4: invalid hyphen in option setting
/(?^-i)AB/
Failed: error 194 at offset 3: invalid hyphen in option setting
/(?x-i-i)/
Failed: error 194 at offset 5: invalid hyphen in option setting
/(?(?=^))b/I
Capture group count = 0
Last code unit = 'b'
Subject length lower bound = 1
abc
0: b
/(?(?=^)|)b/I
Capture group count = 0
First code unit = 'b'
Subject length lower bound = 1
abc
0: b
/(?(?=^)|^)b/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'b'
Subject length lower bound = 1
bbc
0: b
\= Expect no match
abc
No match
/(?(1)^|^())/I
Capture group count = 1
Max back reference = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(?(1)^())b/I
Capture group count = 1
Max back reference = 1
Last code unit = 'b'
Subject length lower bound = 1
/(?(1)^())+b/I,aftertext
Capture group count = 1
Max back reference = 1
Last code unit = 'b'
Subject length lower bound = 1
abc
0: b
0+ c
/(?(1)^()|^)+b/I,aftertext
Capture group count = 1
Max back reference = 1
Compile options: <none>
Overall options: anchored
First code unit = 'b'
Subject length lower bound = 1
bbc
0: b
0+ bc
\= Expect no match
abc
No match
/(?(1)^()|^)*b/I,aftertext
Capture group count = 1
Max back reference = 1
First code unit = 'b'
Subject length lower bound = 1
bbc
0: b
0+ bc
abc
0: b
0+ c
xbc
0: b
0+ c
/(?(1)^())+b/I,aftertext
Capture group count = 1
Max back reference = 1
Last code unit = 'b'
Subject length lower bound = 1
abc
0: b
0+ c
/(?(1)^a()|^a)+b/I,aftertext
Capture group count = 1
Max back reference = 1
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
abc
0: ab
0+ c
\= Expect no match
bbc
No match
/(?(1)^|^(a))+b/I,aftertext
Capture group count = 1
Max back reference = 1
Compile options: <none>
Overall options: anchored
Last code unit = 'b'
Subject length lower bound = 1
abc
0: ab
0+ c
1: a
\= Expect no match
bbc
No match
/(?(1)^a()|^a)*b/I,aftertext
Capture group count = 1
Max back reference = 1
Last code unit = 'b'
Subject length lower bound = 1
abc
0: ab
0+ c
bbc
0: b
0+ bc
xbc
0: b
0+ c
/a(b)c|xyz/g,allvector,replace=<$0>
abcdefabcpqr\=ovector=4
2: <abc>def<abc>pqr
0: 6 9
1: 7 8
2: <unchanged>
3: <unchanged>
abxyz\=ovector=4
1: ab<xyz>
0: 2 5
1: <unset>
2: <unchanged>
3: <unchanged>
abcdefxyz\=ovector=4
2: <abc>def<xyz>
0: 6 9
1: <unset>
2: <unchanged>
3: <unchanged>
/a(b)c|xyz/allvector
abcdef\=ovector=4
0: abc
1: b
2: <unchanged>
3: <unchanged>
abxyz\=ovector=4
0: xyz
1: <unset>
2: <unchanged>
3: <unchanged>
/a(b)c|xyz/g,replace=<$0>,substitute_callout
abcdefabcpqr
1(2) Old 0 3 "abc" New 0 5 "<abc>"
2(2) Old 6 9 "abc" New 8 13 "<abc>"
2: <abc>def<abc>pqr
abxyzpqrabcxyz
1(1) Old 2 5 "xyz" New 2 7 "<xyz>"
2(2) Old 8 11 "abc" New 10 15 "<abc>"
3(1) Old 11 14 "xyz" New 15 20 "<xyz>"
3: ab<xyz>pqr<abc><xyz>
12abc34xyz99abc55\=substitute_stop=2
1(2) Old 2 5 "abc" New 2 7 "<abc>"
2(1) Old 7 10 "xyz" New 9 14 "<xyz> STOPPED"
2: 12<abc>34xyz99abc55
12abc34xyz99abc55\=substitute_skip=1
1(2) Old 2 5 "abc" New 2 7 "<abc> SKIPPED"
2(1) Old 7 10 "xyz" New 7 12 "<xyz>"
3(2) Old 12 15 "abc" New 14 19 "<abc>"
3: 12abc34<xyz>99<abc>55
12abc34xyz99abc55\=substitute_skip=2
1(2) Old 2 5 "abc" New 2 7 "<abc>"
2(1) Old 7 10 "xyz" New 9 14 "<xyz> SKIPPED"
3(2) Old 12 15 "abc" New 14 19 "<abc>"
3: 12<abc>34xyz99<abc>55
/a(b)c|xyz/g,replace=<$0>
abcdefabcpqr
2: <abc>def<abc>pqr
abxyzpqrabcxyz
3: ab<xyz>pqr<abc><xyz>
12abc34xyz\=substitute_stop=2
1(2) Old 2 5 "abc" New 2 7 "<abc>"
2(1) Old 7 10 "xyz" New 9 14 "<xyz> STOPPED"
2: 12<abc>34xyz
12abc34xyz\=substitute_skip=1
1(2) Old 2 5 "abc" New 2 7 "<abc> SKIPPED"
2(1) Old 7 10 "xyz" New 7 12 "<xyz>"
2: 12abc34<xyz>
/a(b)c|xyz/replace=<$0>
abcdefabcpqr
1: <abc>defabcpqr
12abc34xyz\=substitute_skip=1
1(2) Old 2 5 "abc" New 2 7 "<abc> SKIPPED"
1: 12abc34xyz
12abc34xyz\=substitute_stop=1
1(2) Old 2 5 "abc" New 2 7 "<abc> STOPPED"
1: 12abc34xyz
/abc\rdef/
abc\ndef
No match
/abc\rdef\x{0d}xyz/escaped_cr_is_lf
abc\ndef\rxyz
0: abc\x0adef\x0dxyz
\= Expect no match
abc\ndef\nxyz
No match
/(?(*ACCEPT)xxx)/
Failed: error 128 at offset 2: assertion expected after (?( or (?(?C)
/(?(*atomic:xx)xxx)/
Failed: error 128 at offset 10: assertion expected after (?( or (?(?C)
/(?(*script_run:xxx)zzz)/
Failed: error 128 at offset 14: assertion expected after (?( or (?(?C)
/foobar/
the foobar thing\=copy_matched_subject
0: foobar
the foobar thing\=copy_matched_subject,zero_terminate
0: foobar
/foobar/g
the foobar thing foobar again\=copy_matched_subject
0: foobar
0: foobar
/(*:XX)^abc/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
/(*COMMIT:XX)^abc/I
Capture group count = 0
Compile options: <none>
Overall options: anchored
First code unit = 'a'
Subject length lower bound = 3
/(*ACCEPT:XX)^abc/I
Capture group count = 0
May match empty string
Subject length lower bound = 0
/abc/replace=xyz
abc\=null_context
1: xyz
/abc/replace=xyz,substitute_callout
abc
1(1) Old 0 3 "abc" New 0 3 "xyz"
1: xyz
\= Expect error message
abc\=null_context
** Replacement callouts are not supported with null_context.
/\[()]{65535}()/expand
Failed: error 197 at offset 131071: too many capturing groups (maximum 65535)
/\[()]{65535}(?<A>)/expand
Failed: error 197 at offset 131075: too many capturing groups (maximum 65535)
/a(?:(*ACCEPT))??bc/
abc
0: abc
axy
0: a
/a(*ACCEPT)??bc/
abc
0: abc
axy
0: a
/a(*ACCEPT:XX)??bc/mark
abc
0: abc
axy
0: a
MK: XX
/(*:\)?/
Failed: error 109 at offset 5: quantifier does not follow a repeatable item
/(*:\Q \E){5}/alt_verbnames
Failed: error 109 at offset 11: quantifier does not follow a repeatable item
/(?=abc)/I
Capture group count = 0
May match empty string
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 2
/(?|(X)|(XY))\1abc/I
Capture group count = 1
Max back reference = 1
First code unit = 'X'
Last code unit = 'c'
Subject length lower bound = 4
/(?|(a)|(bcde))(c)\2/I
Capture group count = 2
Max back reference = 2
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(?|(a)|(bcde))(c)\1/I
Capture group count = 2
Max back reference = 1
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 2
/(?|(?'A'a)|(?'A'bcde))(?'B'c)\k'B'(?'A')/I,dupnames
Capture group count = 3
Max back reference = 2
Named capture groups:
A 1
A 3
B 2
Options: dupnames
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(?|(?'A'a)|(?'A'bcde))(?'B'c)\k'A'(?'A')/I,dupnames
Capture group count = 3
Max back reference = 3
Named capture groups:
A 1
A 3
B 2
Options: dupnames
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 2
/((a|)+)+Z/I
Capture group count = 2
Starting code units: Z a
Last code unit = 'Z'
Subject length lower bound = 1
/((?=a))[abcd]/I
Capture group count = 1
First code unit = 'a'
Subject length lower bound = 1
/A(?:(*ACCEPT))?B/info
Capture group count = 0
First code unit = 'A'
Subject length lower bound = 1
/(A(*ACCEPT)??B)C/
ABC
0: ABC
1: AB
AXY
0: A
1: A
/(?<=(?<=a)b)c.*/I
Capture group count = 0
Max lookbehind = 1
First code unit = 'c'
Subject length lower bound = 1
abc\=ph
Partial match: c
\= Expect no match
xbc\=ph
No match
/(?<=ab)c.*/I
Capture group count = 0
Max lookbehind = 2
First code unit = 'c'
Subject length lower bound = 1
abc\=ph
Partial match: c
\= Expect no match
xbc\=ph
No match
/(?<=a(?<=a|a)c)/I
Capture group count = 0
Max lookbehind = 2
May match empty string
Subject length lower bound = 0
/(?<=a(?<=a|ba)c)/I
Capture group count = 0
Max lookbehind = 2
May match empty string
Subject length lower bound = 0
/(?<=(?<=a)b)(?<!abcd)/I
Capture group count = 0
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
/(?<=(?<=a)b)(?<!abcd)(?<=(?<=a)bcde)/I
Capture group count = 0
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
# Addition overflow
/( {32742} {42})(?<!\1{65481})/
Failed: error 187 at offset 15: lookbehind assertion is too long
# Multiplication overflow
/(X{65535})(?<=\1{32770})/
Failed: error 187 at offset 10: lookbehind assertion is too long
# ---- Non-atomic assertion tests ----
# Expect error: not allowed as a condition
/(?(*napla:xx)bc)/
Failed: error 198 at offset 9: atomic assertion expected after (?( or (?(?C)
/\A(*pla:.*\b(\w++))(?>.*?\b\1\b){3}/
word1 word3 word1 word2 word3 word2 word2 word1 word3 word4
No match
/\A(*napla:.*\b(\w++))(?>.*?\b\1\b){3}/
word1 word3 word1 word2 word3 word2 word2 word1 word3 word4
0: word1 word3 word1 word2 word3 word2 word2 word1 word3
1: word3
/\A(?*.*\b(\w++))(?>.*?\b\1\b){3}/
word1 word3 word1 word2 word3 word2 word2 word1 word3 word4
0: word1 word3 word1 word2 word3 word2 word2 word1 word3
1: word3
/(*plb:(.)..|(.)...)(\1|\2)/
abcdb\=offset=4
0: b
1: b
2: <unset>
3: b
abcda\=offset=4
No match
/(*naplb:(.)..|(.)...)(\1|\2)/
abcdb\=offset=4
0: b
1: b
2: <unset>
3: b
abcda\=offset=4
0: a
1: <unset>
2: a
3: a
/(?<*(.)..|(.)...)(\1|\2)/
abcdb\=offset=4
0: b
1: b
2: <unset>
3: b
abcda\=offset=4
0: a
1: <unset>
2: a
3: a
/(*non_atomic_positive_lookahead:ab)/B
------------------------------------------------------------------
Bra
Non-atomic assert
ab
Ket
Ket
End
------------------------------------------------------------------
/(*non_atomic_positive_lookbehind:ab)/B
------------------------------------------------------------------
Bra
Non-atomic assert back
Reverse
ab
Ket
Ket
End
------------------------------------------------------------------
/(*pla:ab+)/B
------------------------------------------------------------------
Bra
Assert
a
b++
Ket
Ket
End
------------------------------------------------------------------
/(*napla:ab+)/B
------------------------------------------------------------------
Bra
Non-atomic assert
a
b+
Ket
Ket
End
------------------------------------------------------------------
/(*napla:)+/
/(*naplb:)+/
/(*napla:^x|^y)/I
Capture group count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Starting code units: x y
Subject length lower bound = 1
/(*napla:abc|abd)/I
Capture group count = 0
May match empty string
First code unit = 'a'
Subject length lower bound = 1
/(*napla:a|(.)(*ACCEPT)zz)\1../
abcd
0: abc
1: a
/(*napla:a(*ACCEPT)zz|(.))\1../
abcd
0: bcd
1: b
/(*napla:a|(*COMMIT)(.))\1\1/
aabc
0: aa
1: a
\= Expect no match
abbc
No match
/(*napla:a|(.))\1\1/
aabc
0: aa
1: a
abbc
0: bb
1: b
# ----
# Expect error (recursion => not fixed length)
/(\2)((?=(?<=\1)))/
Failed: error 125 at offset 8: lookbehind assertion is not fixed length
/c*+(?<=[bc])/
abc\=ph
Partial match: c
ab\=ph
Partial match:
abc\=ps
0: c
ab\=ps
0:
/c++(?<=[bc])/
abc\=ph
Partial match: c
ab\=ph
Partial match:
/(?<=(?=.(?<=x)))/
abx
0:
ab\=ph
Partial match:
bxyz
0:
xyz
0:
/\z/
abc\=ph
Partial match:
abc\=ps
0:
/\Z/
abc\=ph
Partial match:
abc\=ps
0:
abc\n\=ph
Partial match: \x0a
abc\n\=ps
0:
/(?![ab]).*/
ab\=ph
Partial match:
/c*+/
ab\=ph,offset=2
Partial match:
/\A\s*(a|(?:[^`]{28500}){4})/I
Capture group count = 1
Max lookbehind = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
a
0: a
1: a
/\A\s*((?:[^`]{28500}){4})/I
Capture group count = 1
Max lookbehind = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 65535
/\A\s*((?:[^`]{28500}){4}|a)/I
Capture group count = 1
Max lookbehind = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
a
0: a
1: a
/(?<A>a)(?(<A>)b)((?<=b).*)/B
------------------------------------------------------------------
Bra
CBra 1
a
Ket
Cond
1 Cond ref
b
Ket
CBra 2
Assert back
Reverse
b
Ket
Any*+
Ket
Ket
End
------------------------------------------------------------------
/(?(1)b)((?<=b).*)/B
------------------------------------------------------------------
Bra
Cond
1 Cond ref
b
Ket
CBra 1
Assert back
Reverse
b
Ket
Any*+
Ket
Ket
End
------------------------------------------------------------------
/(?(R1)b)((?<=b).*)/B
------------------------------------------------------------------
Bra
Cond
Cond recurse 1
b
Ket
CBra 1
Assert back
Reverse
b
Ket
Any*+
Ket
Ket
End
------------------------------------------------------------------
/(?(DEFINE)b)((?<=b).*)/B
------------------------------------------------------------------
Bra
Cond
Cond false
b
Ket
CBra 1
Assert back
Reverse
b
Ket
Any*+
Ket
Ket
End
------------------------------------------------------------------
/(?(VERSION=10.3)b)((?<=b).*)/B
------------------------------------------------------------------
Bra
Cond
Cond false
b
Ket
CBra 1
Assert back
Reverse
b
Ket
Any*+
Ket
Ket
End
------------------------------------------------------------------
/[aA]b[cC]/IB
------------------------------------------------------------------
Bra
/i a
b
/i c
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/[cc]abcd/I
Capture group count = 0
First code unit = 'c'
Last code unit = 'd'
Subject length lower bound = 5
/[Cc]abcd/I
Capture group count = 0
First code unit = 'C' (caseless)
Last code unit = 'd'
Subject length lower bound = 5
/[c]abcd/I
Capture group count = 0
First code unit = 'c'
Last code unit = 'd'
Subject length lower bound = 5
/(?:c|C)abcd/I
Capture group count = 0
First code unit = 'C' (caseless)
Last code unit = 'd'
Subject length lower bound = 5
/(a)?a/I
Capture group count = 1
Starting code units: a
Last code unit = 'a'
Subject length lower bound = 1
manm
0: a
/^(?|(\*)(*napla:\S*_(\2?+.+))|(\w)(?=\S*_(\2?+\1)))+_\2$/
*abc_12345abc
0: *abc_12345abc
1: c
2: 12345abc
/^(?|(\*)(*napla:\S*_(\3?+.+))|(\w)(?=\S*_((\2?+\1))))+_\2$/
*abc_12345abc
0: *abc_12345abc
1: c
2: 12345abc
3: 12345abc
/^((\1+)(?C)|\d)+133X$/
111133X\=callout_capture
Callout 0: last capture = 2
1: 1
2: 111
--->111133X
^ ^ |
Callout 0: last capture = 2
1: 3
2: 3
--->111133X
^ ^ |
Callout 0: last capture = 2
1: 1
2: 11
--->111133X
^ ^ |
Callout 0: last capture = 2
1: 3
2: 3
--->111133X
^ ^ |
0: 111133X
1: 11
2: 11
/abc/replace=xyz,substitute_replacement_only
123abc456
1: xyz
/a(?<ONE>b)c(?<TWO>d)e/g,replace=X$ONE+${TWO}Z,substitute_replacement_only
"abcde-abcde-"
2: Xb+dZXb+dZ
/a(b)c|xyz/g,replace=<$0>,substitute_callout,substitute_replacement_only
abcdefabcpqr
1(2) Old 0 3 "abc" New 0 5 "<abc>"
2(2) Old 6 9 "abc" New 5 10 "<abc>"
2: <abc><abc>
abxyzpqrabcxyz
1(1) Old 2 5 "xyz" New 0 5 "<xyz>"
2(2) Old 8 11 "abc" New 5 10 "<abc>"
3(1) Old 11 14 "xyz" New 10 15 "<xyz>"
3: <xyz><abc><xyz>
12abc34xyz99abc55\=substitute_stop=2
1(2) Old 2 5 "abc" New 0 5 "<abc>"
2(1) Old 7 10 "xyz" New 5 10 "<xyz> STOPPED"
2: <abc>
12abc34xyz99abc55\=substitute_skip=1
1(2) Old 2 5 "abc" New 0 5 "<abc> SKIPPED"
2(1) Old 7 10 "xyz" New 0 5 "<xyz>"
3(2) Old 12 15 "abc" New 5 10 "<abc>"
3: <xyz><abc>
12abc34xyz99abc55\=substitute_skip=2
1(2) Old 2 5 "abc" New 0 5 "<abc>"
2(1) Old 7 10 "xyz" New 5 10 "<xyz> SKIPPED"
3(2) Old 12 15 "abc" New 5 10 "<abc>"
3: <abc><abc>
/a(..)d/replace=>$1<,substitute_matched
xyzabcdxyzabcdxyz
1: xyz>bc<xyzabcdxyz
xyzabcdxyzabcdxyz\=ovector=2
1: xyz>bc<xyzabcdxyz
\= Expect error
xyzabcdxyzabcdxyz\=ovector=1
Failed: error -54 at offset 3 in replacement: requested value is not available
/a(..)d/g,replace=>$1<,substitute_matched
xyzabcdxyzabcdxyz
2: xyz>bc<xyz>bc<xyz
xyzabcdxyzabcdxyz\=ovector=2
2: xyz>bc<xyz>bc<xyz
\= Expect error
xyzabcdxyzabcdxyz\=ovector=1
Failed: error -54 at offset 3 in replacement: requested value is not available
xyzabcdxyzabcdxyz\=ovector=1,substitute_unset_empty
Failed: error -54 at offset 3 in replacement: requested value is not available
/55|a(..)d/g,replace=>$1<,substitute_matched
xyz55abcdxyzabcdxyz\=ovector=2,substitute_unset_empty
3: xyz><>bc<xyz>bc<xyz
\= Expect error
xyz55abcdxyzabcdxyz\=ovector=2
Failed: error -55 at offset 3 in replacement: requested value is not set
/55|a(..)d/replace=>$1<,substitute_matched
xyz55abcdxyzabcdxyz\=ovector=2,substitute_unset_empty
1: xyz><abcdxyzabcdxyz
/55|a(..)d/replace=>$1<
xyz55abcdxyzabcdxyz\=ovector=2,substitute_unset_empty
1: xyz><abcdxyzabcdxyz
/55|a(..)d/g,replace=>$1<
xyz55abcdxyzabcdxyz\=ovector=2,substitute_unset_empty
3: xyz><>bc<xyz>bc<xyz
/abc/replace=,caseless
XabcY
0: abc
XABCY
0: ABC
/abc/replace=[4],caseless
XabcY
1: XY
XABCY
1: XY
/abc/replace=*,caseless
XabcY
1: X*Y
XABCY
1: X*Y
XabcY\=replace=
0: abc
# Expect non-fixed-length error
"(?<=X(?(DEFINE)(.*))(?1))."
Failed: error 125 at offset 0: lookbehind assertion is not fixed length
/\sxxx\s/tables=1
\= Expect no match
AB\x{85}xxx\x{a0}XYZ
No match
/\sxxx\s/tables=2
AB\x{85}xxx\x{a0}XYZ
0: \x85xxx\xa0
/^\w+/tables=2
École
0: \xc3
/^\w+/tables=3
** 'Tables = 3' is invalid: binary tables have not been loaded
École
#loadtables ./testbtables
/^\w+/tables=3
École
0: \xc3
/"(*MARK:>" 00 "<).."/hex,mark,no_start_optimize
AB
0: AB
MK: >\x00<
A\=ph
Partial match, mark=>\x00<: A
\= Expect no match
A
No match, mark = >\x00<
/"(*MARK:>" 00 "<).(?C1)."/hex,mark,no_start_optimize
AB
--->AB
1 ^^ .
Latest Mark: >\x00<
0: AB
MK: >\x00<
/(?(VERSION=0.0/
Failed: error 179 at offset 14: syntax error or number too big in (?(VERSION condition
# Perl has made \K in lookarounds an error. PCRE2 now rejects as well, unless
# explicitly authorized.
/(?=a\Kb)ab/
Failed: error 199 at offset 10: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK)
/(?=a\Kb)ab/allow_lookaround_bsk
ab
0: b
/(?!a\Kb)ac/
Failed: error 199 at offset 10: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK)
/(?!a\Kb)ac/allow_lookaround_bsk
ac
0: ac
/^abc(?<=b\Kc)d/
Failed: error 199 at offset 14: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK)
/^abc(?<=b\Kc)d/allow_lookaround_bsk
abcd
0: cd
/^abc(?<!b\Kq)d/
Failed: error 199 at offset 14: \K is not allowed in lookarounds (but see PCRE2_EXTRA_ALLOW_LOOKAROUND_BSK)
/^abc(?<!b\Kq)d/,allow_lookaround_bsk
abcd
0: abcd
# ---------
# Tests for zero-length NULL to be treated as an empty string.
//
\=null_subject
0:
\= Expect error
abc\=null_subject
Failed: error -51: NULL argument passed with non-zero length
//replace=[20]
abc\=null_replacement
1: abc
\=null_subject
1:
\=null_replacement
1:
/X*/g,replace=xy
\= Expect error
>X<\=null_replacement
Failed: error -51: NULL argument passed with non-zero length
/X+/replace=[20]
>XX<\=null_replacement
1: ><
# ---------
/[Aa]{2}/BI
------------------------------------------------------------------
Bra
/i A{2}
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'A' (caseless)
Last code unit = 'A' (caseless)
Subject length lower bound = 2
aabcd
0: aa
/A{2}/iBI
------------------------------------------------------------------
Bra
/i A{2}
Ket
End
------------------------------------------------------------------
Capture group count = 0
Options: caseless
First code unit = 'A' (caseless)
Last code unit = 'A' (caseless)
Subject length lower bound = 2
aabcd
0: aa
/[Aa]{2,3}/BI
------------------------------------------------------------------
Bra
/i A{2}
/i A?+
Ket
End
------------------------------------------------------------------
Capture group count = 0
First code unit = 'A' (caseless)
Last code unit = 'A' (caseless)
Subject length lower bound = 2
aabcd
0: aa
# End of testinput2
Error -70: PCRE2_ERROR_BADDATA (unknown error number)
Error -62: bad serialized data
Error -2: partial match
Error -1: no match
Error 0: PCRE2_ERROR_BADDATA (unknown error number)
Error 100: no error
Error 101: \ at end of pattern
Error 191: PCRE2_EXTRA_ALLOW_SURROGATE_ESCAPES is not allowed in UTF-16 mode
Error 200: PCRE2_ERROR_BADDATA (unknown error number)
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