pcre2/testdata/testoutput2

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274 KiB
Plaintext

# 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
# 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
Capturing subpattern count = 1
May match empty string
Subject length lower bound = 0
/abc/I
Capturing subpattern 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
*** Failers
No match
defabc\=anchored
No match
ABC
No match
/^abc/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
abc
0: abc
abc\=anchored
0: abc
*** Failers
No match
defabc
No match
defabc\=anchored
No match
/a+bc/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/a*bc/I
Capturing subpattern count = 0
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 2
/a{3}bc/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 5
/(abc|a+z)/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 2
/^abc$/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
abc
0: abc
*** Failers
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: invalid escape sequence in character class
/[\R]/B
Failed: error 107 at offset 2: invalid escape sequence in character class
/[\X]/B
Failed: error 107 at offset 2: invalid escape sequence in character class
/[z-a]/
Failed: error 108 at offset 3: range out of order in character class
/^*/
Failed: error 109 at offset 1: nothing to repeat
/(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
Capturing subpattern count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 1
/.*?b/I
Capturing subpattern count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 1
/cat|dog|elephant/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
Starting code units: a b c d
Subject length lower bound = 1
/(a|[^\dZ])/I
Capturing subpattern 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
Capturing subpattern 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 6: reference to non-existent subpattern
/{4,5}abc/
Failed: error 109 at offset 4: nothing to repeat
/(a)(b)(c)\2/I
Capturing subpattern 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
Matched, but too many substrings
0: abcb
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
Capturing subpattern count = 3
Max back reference = 2
First code unit = 'a'
Subject length lower bound = 3
abc
0: abc
1: a
abc\=ovector=0
Matched, but too many substrings
0: abc
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
Matched, but too many substrings
0: aba
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$/I,dollar_endonly
Capturing subpattern count = 0
Options: dollar_endonly
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
abc
0: abc
*** Failers
No match
abc\n
No match
abc\ndef
No match
/(a)(b)(c)(d)(e)\6/
Failed: error 115 at offset 17: reference to non-existent subpattern
/the quick brown fox/I
Capturing subpattern count = 0
First code unit = 't'
Last code unit = 'x'
Subject length lower bound = 19
the quick brown fox
0: the quick brown fox
this is a line with the quick brown fox
0: the quick brown fox
/the quick brown fox/I,anchored
Capturing subpattern count = 0
Options: anchored
Subject length lower bound = 19
the quick brown fox
0: the quick brown fox
*** Failers
No match
this is a line with the quick brown fox
No match
/ab(?z)cd/
Failed: error 111 at offset 4: unrecognized character after (? or (?-
/^abc|def/I
Capturing subpattern count = 0
Subject length lower bound = 3
abcdef
0: abc
abcdef\=notbol
0: def
/.*((abc)$|(def))/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>ghi<klm>
/<.*?>/I
Capturing subpattern count = 0
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/<.*>/I,ungreedy
Capturing subpattern count = 0
Options: ungreedy
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/(?U)<.*>/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: ungreedy
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 2
abc<def>ghi<klm>nop
0: <def>
/<.*?>/I,ungreedy
Capturing subpattern 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
Capturing subpattern count = 0
Options: ungreedy
First code unit = '='
Last code unit = '='
Subject length lower bound = 3
abc========def
0: ===
/(?U)={3,}?/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: ungreedy
First code unit = '='
Last code unit = '='
Subject length lower bound = 3
abc========def
0: ========
/(?<!bar|cattle)foo/I
Capturing subpattern count = 0
Max lookbehind = 6
First code unit = 'f'
Last code unit = 'o'
Subject length lower bound = 3
foo
0: foo
catfoo
0: foo
*** Failers
No match
the barfoo
No match
and cattlefoo
No match
/(?<=a+)b/
Failed: error 125 at offset 6: lookbehind assertion is not fixed length
/(?<=aaa|b{0,3})b/
Failed: error 125 at offset 14: lookbehind assertion is not fixed length
/(?<!(foo)a\1)bar/
Failed: error 125 at offset 12: lookbehind assertion is not fixed length
/(?i)abc/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: caseless
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/(a|(?m)a)/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?i)^1234/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored caseless
Subject length lower bound = 4
/(^b|(?i)^d)/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/(?s).*/I
Capturing subpattern count = 0
May match empty string
Compile options: <none>
Overall options: anchored dotall
Subject length lower bound = 0
/[abcd]/I
Capturing subpattern count = 0
Starting code units: a b c d
Subject length lower bound = 1
/(?i)[abcd]/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: caseless
Starting code units: A B C D a b c d
Subject length lower bound = 1
/(?m)[xy]|(b|c)/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: multiline
Starting code units: b c x y
Subject length lower bound = 1
/(^a|^b)/Im
Capturing subpattern count = 1
Options: multiline
First code unit at start or follows newline
Subject length lower bound = 1
/(?i)(^a|^b)/Im
Capturing subpattern count = 1
Compile options: multiline
Overall options: caseless multiline
First code unit at start or follows newline
Subject length lower bound = 1
/(a)(?(1)a|b|c)/
Failed: error 127 at offset 13: conditional group contains more than two branches
/(?(?=a)a|b|c)/
Failed: error 127 at offset 12: conditional group contains more than two branches
/(?(1a)/
Failed: error 126 at offset 4: malformed number or name after (?(
/(?(1a))/
Failed: error 126 at offset 4: malformed number or name after (?(
/(?(?i))/
Failed: error 128 at offset 3: assertion expected after (?(
/(?(abc))/
Failed: error 115 at offset 7: reference to non-existent subpattern
/(?(?<ab))/
Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
/((?s)blah)\s+\1/I
Capturing subpattern count = 1
Max back reference = 1
First code unit = 'b'
Last code unit = 'h'
Subject length lower bound = 9
/((?i)blah)\s+\1/I
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 1
First code unit = 'b' (caseless)
Subject length lower bound = 1
/(a*b|(?i:c*(?-i)d))/I
Capturing subpattern count = 1
Starting code units: C a b c d
Subject length lower bound = 1
/a$/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
a
0: a
a\n
0: a
*** Failers
No match
a\=noteol
No match
a\n\=noteol
No match
/a$/Im
Capturing subpattern 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
*** Failers
No match
a\=noteol
No match
/\Aabc/Im
Capturing subpattern count = 0
Max lookbehind = 1
Compile options: multiline
Overall options: anchored multiline
Subject length lower bound = 3
/^abc/Im
Capturing subpattern 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
Capturing subpattern count = 5
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
aaaaabbbbbcccccdef
0: aaaaabbbbbcccccdef
1: aaaaabbbbbcccccdef
2: aaaaa
3: b
4: bbbbccccc
5: def
/(?<=foo)[ab]/I
Capturing subpattern count = 0
Max lookbehind = 3
Starting code units: a b
Subject length lower bound = 1
/(?<!foo)(alpha|omega)/I
Capturing subpattern count = 1
Max lookbehind = 3
Starting code units: a o
Last code unit = 'a'
Subject length lower bound = 5
/(?!alphabet)[ab]/I
Capturing subpattern count = 0
Starting code units: a b
Subject length lower bound = 1
/(?<=foo\n)^bar/Im
Capturing subpattern 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
***Failers
No match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/^(?<=foo\n)bar/Im
Capturing subpattern 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
***Failers
No match
rhubarb
No match
barbell
No match
abc\nbarton
No match
/(?>^abc)/Im
Capturing subpattern 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
*** Failers
No match
defabc
No match
/(?<=ab(c+)d)ef/
Failed: error 125 at offset 11: lookbehind assertion is not fixed length
/(?<=ab(?<=c+)d)ef/
Failed: error 125 at offset 12: lookbehind assertion is not fixed length
/(?<=ab(c|de)f)g/
Failed: error 125 at offset 13: lookbehind assertion is not fixed length
/The next three are in testinput2 because they have variable length branches/
/(?<=bullock|donkey)-cart/I
Capturing subpattern 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
*** Failers
No match
cart
No match
horse-and-cart
No match
/(?<=ab(?i)x|y|z)/I
Capturing subpattern count = 0
Max lookbehind = 3
May match empty string
Subject length lower bound = 0
/(?>.*)(?<=(abcd)|(xyz))/I
Capturing subpattern 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
Capturing subpattern 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
*** Failers
No match
ZZ
No match
abXYZZ
No match
zzz
No match
bzz
No match
/(?<!(foo)a)bar/I
Capturing subpattern count = 1
Max lookbehind = 4
First code unit = 'b'
Last code unit = 'r'
Subject length lower bound = 3
bar
0: bar
foobbar
0: bar
*** Failers
No match
fooabar
No match
/This one is here because Perl behaves differently; see also the following/I
Capturing subpattern count = 0
First code unit = 'T'
Last code unit = 'g'
Subject length lower bound = 73
/^(a\1?){4}$/I
Capturing subpattern count = 1
Max back reference = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 4
aaaa
No match
aaaaaa
No match
/Perl does not fail these two for the final subjects. Neither did PCRE until/
/release 8.01. The problem is in backtracking into a subpattern that contains/
No match
/a recursive reference to itself. PCRE has now made these into atomic patterns./
No match
/^(xa|=?\1a){2}$/
xa=xaa
0: xa=xaa
1: =xaa
** Failers
No match
xa=xaaa
No match
/^(xa|=?\1a)+$/
xa=xaa
0: xa=xaa
1: =xaa
** Failers
No match
xa=xaaa
No match
/These are syntax tests from Perl 5.005/I
Capturing subpattern count = 0
First code unit = 'T'
Last code unit = '5'
Subject length lower bound = 38
/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: nothing to repeat
/(*)b/
Failed: error 109 at offset 1: nothing to repeat
/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: nothing to repeat
/)(/
Failed: error 122 at offset 0: unmatched closing parenthesis
/\1/
Failed: error 115 at offset 2: reference to non-existent subpattern
/\2/
Failed: error 115 at offset 2: reference to non-existent subpattern
/(a)|\2/
Failed: error 115 at offset 6: 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: nothing to repeat
/(*)b/Ii
Failed: error 109 at offset 1: nothing to repeat
/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: nothing to repeat
/)(/Ii
Failed: error 122 at offset 0: unmatched closing parenthesis
/:(?:/
Failed: error 114 at offset 4: missing closing parenthesis
/(?<%)b/
Failed: error 124 at offset 3: unrecognized character after (?<
/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 126 at offset 4: malformed number or name after (?(
/[a[:xyz:/
Failed: error 106 at offset 8: missing terminating ] for character class
/(?<=x+)y/
Failed: error 125 at offset 6: 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
Capturing subpattern 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 (-47): unknown or unset substring
/(.{20})/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 3
Compile options: <none>
Overall options: anchored
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 (-47): unknown or unset substring
3G f (1)
get substring 4 failed (-47): unknown or unset 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 (-47): unknown or unset 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
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
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
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored dotall
Subject length lower bound = 1
/(?s:.*X|^B)/IB
------------------------------------------------------------------
Bra
Bra
AllAny*
X
Alt
^
B
Ket
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/\Biss\B/I,aftertext
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
*** Failers
No match
Mississippi\=anchored
No match
/(?<=[Ms])iss/Ig,aftertext
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
ississippi
0: iss
0+ issippi
/.*iss/Ig,aftertext
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
Mississippi
0: Mis
0+ sissippi
/^ab\n/Ig,aftertext
Capturing subpattern count = 0
Contains explicit CR or LF match
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
ab\nab\ncd
0: ab\x0a
0+ ab\x0acd
/^ab\n/Igm,aftertext
Capturing subpattern 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
/abc/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/abc|bac/I
Capturing subpattern count = 0
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(abc|bac)/I
Capturing subpattern count = 1
Starting code units: a b
Last code unit = 'c'
Subject length lower bound = 3
/(abc|(c|dc))/I
Capturing subpattern count = 2
Starting code units: a c d
Last code unit = 'c'
Subject length lower bound = 1
/(abc|(d|de)c)/I
Capturing subpattern count = 2
Starting code units: a d
Last code unit = 'c'
Subject length lower bound = 2
/a*/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
/a+/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/(baa|a+)/I
Capturing subpattern count = 1
Starting code units: a b
Last code unit = 'a'
Subject length lower bound = 1
/a{0,3}/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
/baa{3,}/I
Capturing subpattern count = 0
First code unit = 'b'
Last code unit = 'a'
Subject length lower bound = 5
/"([^\\"]+|\\.)*"/I
Capturing subpattern count = 1
First code unit = '"'
Last code unit = '"'
Subject length lower bound = 2
/(abc|ab[cd])/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 3
/(a|.)/I
Capturing subpattern count = 1
Subject length lower bound = 1
/a|ba|\w/I
Capturing subpattern 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
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'r'
Subject length lower bound = 3
/...(?<=abc)/I
Capturing subpattern count = 0
Max lookbehind = 3
Subject length lower bound = 3
/abc(?!pqr)/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/ab./I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/ab[xyz]/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/abc*/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/ab.c*/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/a.c*/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 2
/.c*/I
Capturing subpattern count = 0
Subject length lower bound = 1
/ac*/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/(a.c*|b.c*)/I
Capturing subpattern count = 1
Starting code units: a b
Subject length lower bound = 2
/a.c*|aba/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 2
/.+a/I
Capturing subpattern count = 0
Last code unit = 'a'
Subject length lower bound = 2
/(?=abcda)a.*/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 1
/(?=a)a.*/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/a(b)*/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/a\d*/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/ab\d*/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/a(\d)*/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/abcde{0,0}/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
/ab\d+/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 3
/a(?(1)b)(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 2
/a(?(1)bag|big)(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'g'
Subject length lower bound = 5
/a(?(1)bag|big)*(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 2
/a(?(1)bag|big)+(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'g'
Subject length lower bound = 5
/a(?(1)b..|b..)(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 5
/ab\d{0}e/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'e'
Subject length lower bound = 3
/a?b?/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
a
0: a
b
0: b
ab
0: ab
\
0:
*** Failers
0:
\=notempty
No match
/|-/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
abcd
0:
-abc
0:
ab-c\=notempty
0: -
*** Failers
0:
abc\=notempty
No match
/^.?abcd/I
Capturing subpattern 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
Capturing subpattern 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)
*** Failers
No match
abcd
No match
abcd)
No match
(abcd
No match
/\( ( (?>[^()]+) | (?R) )* \) /Igx
Capturing subpattern 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
Capturing subpattern 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))
*** Failers
No match
()
No match
/\( (?: (?>[^()]+) | (?R) )? \) /Ix
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^alnum:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-/:-@[-`{-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:alpha:]]/IB
------------------------------------------------------------------
Bra
^
[A-Za-z]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^alpha:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-@[-`{-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/[_[:alpha:]]/I
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^ascii:]]/IB
------------------------------------------------------------------
Bra
^
[\x80-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x09 ]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x08\x0a-\x1f!-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/[\n\x0b\x0c\x0d[:blank:]]/I
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:digit:]]/IB
------------------------------------------------------------------
Bra
^
[0-9]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:graph:]]/IB
------------------------------------------------------------------
Bra
^
[!-~]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:lower:]]/IB
------------------------------------------------------------------
Bra
^
[a-z]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:print:]]/IB
------------------------------------------------------------------
Bra
^
[ -~]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:punct:]]/IB
------------------------------------------------------------------
Bra
^
[!-/:-@[-`{-~]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:space:]]/IB
------------------------------------------------------------------
Bra
^
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:upper:]]/IB
------------------------------------------------------------------
Bra
^
[A-Z]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:xdigit:]]/IB
------------------------------------------------------------------
Bra
^
[0-9A-Fa-f]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:word:]]/IB
------------------------------------------------------------------
Bra
^
[0-9A-Z_a-z]
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^cntrl:]]/IB
------------------------------------------------------------------
Bra
^
[ -~\x80-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[12[:^digit:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-/12:-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/^[[:^blank:]]/IB
------------------------------------------------------------------
Bra
^
[\x00-\x08\x0a-\x1f!-\xff] (neg)
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
/[01[:alpha:]%]/IB
------------------------------------------------------------------
Bra
[%01A-Za-z]
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
*** Failers
0: ai
1: a
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 135 at offset 6: invalid condition (?(0)
# 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
Capturing subpattern count = 271
Max back reference = 270
Starting code units: 0 1 2 3 4 5 6 7 8 9
Subject length lower bound = 272
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
Capturing subpattern 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
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
aba
0: aba
1: a
2: b
/^(aa(bb)?)+$/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa|aa(bb))+$/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(aa(bb)??)+$/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
/^(?:aa(bb)?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
/^(aa(b(b))?)+$/I
Capturing subpattern count = 3
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: aa
2: bb
3: b
/^(?:aa(b(b))?)+$/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
2: b
/^(?:aa(b(?:b))?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: bb
/^(?:aa(bb(?:b))?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(b(?:bb))?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bbb
/^(?:aa(?:b(b))?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbaa
0: aabbaa
1: b
/^(?:aa(?:b(bb))?)+$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: bb
/^(aa(b(bb))?)+$/I
Capturing subpattern count = 3
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbbaa
0: aabbbaa
1: aa
2: bbb
3: bb
/^(aa(bb(bb))?)+$/I
Capturing subpattern count = 3
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
aabbbbaa
0: aabbbbaa
1: aa
2: bbbb
3: bb
# ----------------
/#/IBx
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
May match empty string
Options: extended
Subject length lower bound = 0
/a#/IBx
------------------------------------------------------------------
Bra
a
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Options: extended
First code unit = 'a'
Subject length lower bound = 1
/[\s]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b' (caseless)
Subject length lower bound = 2
ab
0: ab
aB
0: aB
*** Failers
No match
AB
No match
/(a(?i)b)/IB
------------------------------------------------------------------
Bra
CBra 1
a
/i b
Ket
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
*** Failers
No match
AB
No match
/ (?i)abc/IBx
------------------------------------------------------------------
Bra
/i abc
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: extended
Overall options: caseless 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: extended
Overall options: caseless extended
First code unit = 'a' (caseless)
Last code unit = 'c' (caseless)
Subject length lower bound = 3
/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
------------------------------------------------------------------
Bra
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = '1'
Last code unit = '0'
Subject length lower bound = 300
/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
------------------------------------------------------------------
Bra
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = '1'
Last code unit = '0'
Subject length lower bound = 300
/\Q\E/IB
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
\
0:
/\Q\Ex/IB
------------------------------------------------------------------
Bra
x
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = 'x'
Subject length lower bound = 1
/ \Q\E/IB
------------------------------------------------------------------
Bra
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = ' '
Subject length lower bound = 1
/a\Q\E/IB
------------------------------------------------------------------
Bra
a
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/x*+\w/IB
------------------------------------------------------------------
Bra
x*+
\w
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
*** Failers
0: F
xxxxx
No match
/x?+/IB
------------------------------------------------------------------
Bra
x?+
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
/x++/IB
------------------------------------------------------------------
Bra
x++
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 1
May match empty string
Subject length lower bound = 0
/^(\w++|\s++)*$/I
Capturing subpattern 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
*** Failers
No match
this is not a line with only words and spaces!
No match
/(\d++)(\w)/I
Capturing subpattern 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
*** Failers
No match
12345+
No match
/a++b/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
/(a++b)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
1: aaab
/(a++)b/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
aaab
0: aaab
1: aaa
/([^()]++|\([^()]*\))+/I
Capturing subpattern 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
Capturing subpattern 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
*** Failers
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
------------------------------------------------------------------
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/a+?+/I
Failed: error 109 at offset 3: nothing to repeat
/a{2,3}?+b/I
Failed: error 109 at offset 7: nothing to repeat
/(?U)a+?+/I
Failed: error 109 at offset 7: nothing to repeat
/a{2,3}?+b/I,ungreedy
Failed: error 109 at offset 7: nothing to repeat
/x(?U)a++b/IB
------------------------------------------------------------------
Bra
x
a++
b
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: ungreedy
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
------------------------------------------------------------------
Capturing subpattern count = 5
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
/^x(?U)a+b/IB
------------------------------------------------------------------
Bra
^
x
a++
b
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'b'
Subject length lower bound = 3
/^x(?U)(a+)b/IB
------------------------------------------------------------------
Bra
^
x
CBra 1
a+?
Ket
b
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
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
/\l/I
Failed: error 137 at offset 1: PCRE does not support \L, \l, \N{name}, \U, or \u
/\L/I
Failed: error 137 at offset 1: PCRE does not support \L, \l, \N{name}, \U, or \u
/\N{name}/I
Failed: error 137 at offset 1: PCRE does not support \L, \l, \N{name}, \U, or \u
/\u/I
Failed: error 137 at offset 1: PCRE does not support \L, \l, \N{name}, \U, or \u
/\U/I
Failed: error 137 at offset 1: PCRE does not support \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
------------------------------------------------------------------
Capturing subpattern count = 0
Starting code units: \x09 \x0a \x0b \x0c \x0d \x20
Subject length lower bound = 1
/[[:space:]]/IB
------------------------------------------------------------------
Bra
[\x09-\x0d ]
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
Capturing subpattern 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: <>
*** Failers
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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Max lookbehind = 1
First code unit = '$'
Last code unit = 'X'
Subject length lower bound = 404
/(.*)\d+\1/I
Capturing subpattern count = 1
Max back reference = 1
Subject length lower bound = 1
/(.*)\d+/I
Capturing subpattern count = 1
First code unit at start or follows newline
Subject length lower bound = 1
/(.*)\d+\1/Is
Capturing subpattern count = 1
Max back reference = 1
Options: dotall
Subject length lower bound = 1
/(.*)\d+/Is
Capturing subpattern count = 1
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 1
/(.*(xyz))\d+\2/I
Capturing subpattern 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
Capturing subpattern count = 2
Max back reference = 1
Subject length lower bound = 1
abc123bc
0: bc123bc
1: bc
2: bc
/a[b]/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(?=a).*/I
Capturing subpattern count = 0
May match empty string
First code unit = 'a'
Subject length lower bound = 0
/(?=abc).xyz/Ii
Capturing subpattern count = 0
Options: caseless
First code unit = 'a' (caseless)
Last code unit = 'z' (caseless)
Subject length lower bound = 4
/(?=abc)(?i).xyz/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'z' (caseless)
Subject length lower bound = 4
/(?=a)(?=b)/I
Capturing subpattern count = 0
May match empty string
First code unit = 'a'
Subject length lower bound = 0
/(?=.)a/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/((?=abcda)a)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 1
/((?=abcda)ab)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/()a/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?:(?=.)|(?<!x))a/I
Capturing subpattern count = 0
Max lookbehind = 1
First code unit = 'a'
Subject length lower bound = 1
/(?(1)ab|ac)(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 3
/(?(1)abz|acz)(.)/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 4
/(?(1)abz)(.)/I
Capturing subpattern count = 1
Subject length lower bound = 1
/(?(1)abz)(1)23/I
Capturing subpattern count = 1
Last code unit = '3'
Subject length lower bound = 3
/(a)+/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/(a){2,3}/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'a'
Subject length lower bound = 2
/(a)*/I
Capturing subpattern count = 1
May match empty string
Subject length lower bound = 0
/[a]/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/[ab]/I
Capturing subpattern count = 0
Starting code units: a b
Subject length lower bound = 1
/[ab]/I
Capturing subpattern count = 0
Starting code units: a b
Subject length lower bound = 1
/[^a]/I
Capturing subpattern count = 0
Subject length lower bound = 1
/\d456/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/^a/Im
Capturing subpattern 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
*** Failers
No match
xyabc
No match
/c|abc/I
Capturing subpattern count = 0
Starting code units: a c
Last code unit = 'c'
Subject length lower bound = 1
/(?i)[ab]/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: caseless
Starting code units: A B a b
Subject length lower bound = 1
/[ab](?i)cd/I
Capturing subpattern count = 0
Starting code units: a b
Last code unit = 'd' (caseless)
Subject length lower bound = 3
/abc(?C)def/I
Capturing subpattern 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
*** Failers
No match
abcxyz
No match
abcxyzf
--->abcxyzf
0 ^ ^ d
No match
/abc(?C)de(?C1)f/I
Capturing subpattern 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
Capturing subpattern 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
*** Failers
No match
abcdef
No match
/(?C1)\dabc(?C2)def/I
Capturing subpattern 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
*** Failers
No match
abcdef
No match
/(?C255)ab/I
Capturing subpattern 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 139 at offset 3: closing parenthesis for (?C expected
/(?C12vr)x/I
Failed: error 139 at offset 5: closing parenthesis for (?C expected
/abc(?C)def/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
*** Failers
No match
\x83\x0\x61bcdef
--->\x83\x00abcdef
0 ^ ^ d
0: abcdef
/(abc)(?C)de(?C1)f/I
Capturing subpattern 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
0: <unset>
1: abc
--->123abcdef
^ ^ d
Callout 1: last capture = 1
0: <unset>
1: abc
--->123abcdef
^ ^ f
0: abcdef
1: abc
123abcdefC-\=callout_none
0: abcdef
1: abc
*** Failers
No match
123abcdef\=callout_fail=1
--->123abcdef
0 ^ ^ d
1 ^ ^ f
No match
/(?C0)(abc(?C1))*/I
Capturing subpattern count = 1
May match empty string
Subject length lower bound = 0
abcabcabc
--->abcabcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
1 ^ ^ )
0: abcabcabc
1: abc
abcabc\=callout_fail=1:3
--->abcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
0: abcabc
1: abc
*** Failers
--->*** Failers
0 ^ (abc(?C1))*
0:
abcabcabc\=callout_fail=1:3
--->abcabcabc
0 ^ (abc(?C1))*
1 ^ ^ )
1 ^ ^ )
1 ^ ^ )
0: abcabc
1: abc
/(\d{3}(?C))*/I
Capturing subpattern count = 1
May match empty string
Subject length lower bound = 0
123\=callout_capture
Callout 0: last capture = 0
0: <unset>
--->123
^ ^ )
0: 123
1: 123
123456\=callout_capture
Callout 0: last capture = 0
0: <unset>
--->123456
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 123
--->123456
^ ^ )
0: 123456
1: 456
123456789\=callout_capture
Callout 0: last capture = 0
0: <unset>
--->123456789
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 123
--->123456789
^ ^ )
Callout 0: last capture = 1
0: <unset>
1: 456
--->123456789
^ ^ )
0: 123456789
1: 789
/((xyz)(?C)p|(?C1)xyzabc)/I
Capturing subpattern count = 2
First code unit = 'x'
Subject length lower bound = 4
xyzabc\=callout_capture
Callout 0: last capture = 2
0: <unset>
1: <unset>
2: xyz
--->xyzabc
^ ^ p
Callout 1: last capture = 0
0: <unset>
--->xyzabc
^ x
0: xyzabc
1: xyzabc
/(X)((xyz)(?C)p|(?C1)xyzabc)/I
Capturing subpattern count = 3
First code unit = 'X'
Last code unit = 'x'
Subject length lower bound = 5
Xxyzabc\=callout_capture
Callout 0: last capture = 3
0: <unset>
1: X
2: <unset>
3: xyz
--->Xxyzabc
^ ^ p
Callout 1: last capture = 1
0: <unset>
1: X
--->Xxyzabc
^^ x
0: Xxyzabc
1: X
2: xyzabc
/(?=(abc))(?C)abcdef/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'f'
Subject length lower bound = 6
abcdef\=callout_capture
Callout 0: last capture = 1
0: <unset>
1: abc
--->abcdef
^ a
0: abcdef
1: abc
/(?!(abc)(?C1)d)(?C2)abcxyz/I
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'z'
Subject length lower bound = 6
abcxyz\=callout_capture
Callout 1: last capture = 1
0: <unset>
1: abc
--->abcxyz
^ ^ d
Callout 2: last capture = 0
0: <unset>
--->abcxyz
^ a
0: abcxyz
/(?<=(abc)(?C))xyz/I
Capturing subpattern 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
0: <unset>
1: abc
--->abcxyz
^ )
0: xyz
1: abc
/a(b+)(c*)(?C1)/I
Capturing subpattern count = 2
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
abbbbbccc\=callout_data=1
--->abbbbbccc
1 ^ ^
Callout data = 1
No match
/a(b+?)(c*?)(?C1)/I
Capturing subpattern count = 2
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
abbbbbccc\=callout_data=1
--->abbbbbccc
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
1 ^ ^
Callout data = 1
No match
/(?C)abc/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/(?C)^abc/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
/(?C)a|b/I
Capturing subpattern count = 0
Starting code units: a b
Subject length lower bound = 1
/(?R)/I
Failed: error 140 at offset 3: recursion could loop indefinitely
/(a|(?R))/I
Failed: error 140 at offset 6: recursion could loop indefinitely
/(ab|(bc|(de|(?R))))/I
Failed: error 140 at offset 15: recursion could loop indefinitely
/x(ab|(bc|(de|(?R))))/I
Capturing subpattern 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
*** Failers
No match
xyab
No match
/(ab|(bc|(de|(?1))))/I
Failed: error 140 at offset 15: recursion could loop indefinitely
/x(ab|(bc|(de|(?1)x)x)x)/I
Failed: error 140 at offset 16: recursion could loop indefinitely
/^([^()]|\((?1)*\))*$/I
Capturing subpattern 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
*** Failers)
No match
a(b(c)d
No match
/^>abc>([^()]|\((?1)*\))*<xyz<$/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
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
------------------------------------------------------------------
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/(a(?1)+b)/IB
------------------------------------------------------------------
Bra
CBra 1
a
Once
Recurse
KetRmax
b
Ket
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = 'b'
Subject length lower bound = 2
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
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
*** Failers
No match
((2+2)*-3)-7)
No match
/^(x(y|(?1){2})z)/I
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
xyz
0: xyz
1: xyz
2: y
xxyzxyzz
0: xxyzxyzz
1: xxyzxyzz
2: xyzxyz
*** Failers
No match
xxyzz
No match
xxyzxyzxyzz
No match
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/Ix
Capturing subpattern 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: <>
*** Failers
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
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 9
abcdefabc
0: abcdefabc
1: abc
/^(a|b|c)=(?1)+/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
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
Capturing subpattern count = 2
Compile options: <none>
Overall options: anchored
Subject length lower bound = 3
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
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern count = 3
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
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
Capturing subpattern count = 4
Max back reference = 4
Named capturing subpatterns:
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
*** Failers
No match
The quick brown fox
No match
/((?(R)a|b))\1(?1)?/I
Capturing subpattern count = 1
Max back reference = 1
Subject length lower bound = 2
bb
0: bb
1: b
bbaa
0: bba
1: b
/(.*)a/Is
Capturing subpattern count = 1
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'a'
Subject length lower bound = 1
/(.*)a\1/Is
Capturing subpattern count = 1
Max back reference = 1
Options: dotall
Last code unit = 'a'
Subject length lower bound = 1
/(.*)a(b)\2/Is
Capturing subpattern 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
Capturing subpattern count = 3
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|(.*)b)z\1/Is
Capturing subpattern count = 3
Max back reference = 1
Options: dotall
Last code unit = 'z'
Subject length lower bound = 3
/((.*)a|(.*)b)z\2/Is
Capturing subpattern count = 3
Max back reference = 2
Options: dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|(.*)b)z\3/Is
Capturing subpattern count = 3
Max back reference = 3
Options: dotall
Last code unit = 'z'
Subject length lower bound = 2
/((.*)a|^(.*)b)z\3/Is
Capturing subpattern count = 3
Max back reference = 3
Compile options: dotall
Overall options: anchored dotall
Last code unit = 'z'
Subject length lower bound = 2
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/Is
Capturing subpattern count = 31
May match empty string
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 0
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/Is
Capturing subpattern count = 31
Max back reference = 31
May match empty string
Options: dotall
Subject length lower bound = 0
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/Is
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 1
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern count = 1
Named capturing subpatterns:
named 1
Options: no_auto_capture
First code unit = 'a'
Last code unit = 'c'
Subject length lower bound = 3
/(aaa(?C1)bbb|ab)/I
Capturing subpattern 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
aaabbb\=callout_data=-1
--->aaabbb
1 ^ ^ b
Callout data = -1
No match
/ab(?P<one>cd)ef(?P<two>gh)/I
Capturing subpattern count = 2
Named capturing subpatterns:
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
abcdefgh\=copy=one,copy=two
0: abcdefgh
1: cd
2: gh
C cd (2) one
C gh (2) two
abcdefgh\=copy=three
0: abcdefgh
1: cd
2: gh
copy substring 'three' failed (-47): unknown or unset substring
/(?P<Tes>)(?P<Test>)/IB
------------------------------------------------------------------
Bra
CBra 1
Ket
CBra 2
Ket
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern count = 2
Named capturing subpatterns:
Tes 2
Test 1
May match empty string
Subject length lower bound = 0
/(?P<Z>zz)(?P<A>aa)/I
Capturing subpattern count = 2
Named capturing subpatterns:
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
zzaa\=copy=A
0: zzaa
1: zz
2: aa
C aa (2) A
/(?P<x>eks)(?P<x>eccs)/I
Failed: error 143 at offset 15: 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 30: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
"\[((?P<elem>\d+)(,(?P>elem))*)\]"I
Capturing subpattern count = 3
Named capturing subpatterns:
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
*** Failers
No match
[]
No match
"\[((?P<elem>\d+)(,(?P>elem))*)?\]"I
Capturing subpattern count = 3
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 2
May match empty string
Subject length lower bound = 0
/[ab]{1}+/IB
------------------------------------------------------------------
Bra
[ab]{1,1}+
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Starting code units: a b
Subject length lower bound = 1
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Capturing subpattern 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
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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 ^ ^
0: abcde
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
------------------------------------------------------------------
Capturing subpattern 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 ^ ^
0: ab
aaaab
--->aaaab
+0 ^ a*
+2 ^ ^ b
+3 ^ ^
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 ^^
0: b
/a*b/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 2
a*+
Callout 255 2 1
b
Callout 255 3 0
Ket
End
------------------------------------------------------------------
Capturing subpattern 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 ^ ^
0: ab
aaaab
--->aaaab
+0 ^ a*
+2 ^ ^ b
+3 ^ ^
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 ^^
0: b
/a+b/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 2
a++
Callout 255 2 1
b
Callout 255 3 0
Ket
End
------------------------------------------------------------------
Capturing subpattern 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 ^ ^
0: ab
aaaab
--->aaaab
+0 ^ a+
+2 ^ ^ b
+3 ^ ^
0: aaaab
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 9
CBra 1
Callout 255 1 1
a
Callout 255 2 1
b
Callout 255 3 1
c
Callout 255 4 0
Alt
Callout 255 5 1
d
Callout 255 6 1
e
Callout 255 7 1
f
Callout 255 8 0
Ket
Callout 255 9 1
x
Callout 255 10 0
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a d
Last code unit = 'x'
Subject length lower bound = 4
abcx
--->abcx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+10 ^ ^
0: abcx
1: abc
defx
--->defx
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+10 ^ ^
0: defx
1: def
** Failers
No match
abcdefzx
--->abcdefzx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
No match
/(abc|def)x/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 9
CBra 1
Callout 255 1 1
a
Callout 255 2 1
b
Callout 255 3 1
c
Callout 255 4 0
Alt
Callout 255 5 1
d
Callout 255 6 1
e
Callout 255 7 1
f
Callout 255 8 0
Ket
Callout 255 9 1
x
Callout 255 10 0
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a d
Last code unit = 'x'
Subject length lower bound = 4
abcx
--->abcx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+10 ^ ^
0: abcx
1: abc
defx
--->defx
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
+10 ^ ^
0: defx
1: def
** Failers
No match
abcdefzx
--->abcdefzx
+0 ^ (abc|def)
+1 ^ a
+2 ^^ b
+3 ^ ^ c
+4 ^ ^ |
+9 ^ ^ x
+5 ^ d
+0 ^ (abc|def)
+1 ^ a
+5 ^ d
+6 ^^ e
+7 ^ ^ f
+8 ^ ^ )
+9 ^ ^ x
No match
/(ab|cd){3,4}/I,auto_callout
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a c
Subject length lower bound = 6
ababab
--->ababab
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+12 ^ ^
0: ababab
1: ab
abcdabcd
--->abcdabcd
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+2 ^ ^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+12 ^ ^
0: abcdabcd
1: cd
abcdcdcdcdcd
--->abcdcdcdcdcd
+0 ^ (ab|cd){3,4}
+1 ^ a
+2 ^^ b
+3 ^ ^ |
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+1 ^ ^ a
+4 ^ ^ c
+5 ^ ^ d
+6 ^ ^ )
+12 ^ ^
0: abcdcdcd
1: cd
/([ab]{,4}c|xy)/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 14
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 0
Alt
Callout 255 11 1
x
Callout 255 12 1
y
Callout 255 13 0
Ket
Callout 255 14 0
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a b x
Subject length lower bound = 2
Note: that { does NOT introduce a quantifier
--->Note: that { does NOT introduce a quantifier
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
No match
/([ab]{,4}c|xy)/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 14
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 0
Alt
Callout 255 11 1
x
Callout 255 12 1
y
Callout 255 13 0
Ket
Callout 255 14 0
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a b x
Subject length lower bound = 2
Note: that { does NOT introduce a quantifier
--->Note: that { does NOT introduce a quantifier
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
+0 ^ ([ab]{,4}c|xy)
+1 ^ [ab]
+5 ^^ {
+11 ^ x
No match
/([ab]{1,4}c|xy){4,5}?123/IB,auto_callout
------------------------------------------------------------------
Bra
Callout 255 0 21
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 0
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 0
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 0
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 0
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 0
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 0
Ket
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 0
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 0
Ket
Braminzero
CBra 1
Callout 255 1 9
[ab]{1,4}+
Callout 255 10 1
c
Callout 255 11 0
Alt
Callout 255 12 1
x
Callout 255 13 1
y
Callout 255 14 0
Ket
Callout 255 21 1
1
Callout 255 22 1
2
Callout 255 23 1
3
Callout 255 24 0
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
Options: auto_callout
Starting code units: a b x
Last code unit = '3'
Subject length lower bound = 11
aacaacaacaacaac123
--->aacaacaacaacaac123
+0 ^ ([ab]{1,4}c|xy){4,5}?
+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 ^ ^
0: aacaacaacaacaac123
1: aac
/\b.*/I
Capturing subpattern count = 0
Max lookbehind = 1
May match empty string
Subject length lower bound = 0
ab cd\=offset=1
0: cd
/\b.*/Is
Capturing subpattern count = 0
Max lookbehind = 1
May match empty string
Options: dotall
Subject length lower bound = 0
ab cd\=offset=1
0: cd
/(?!.bcd).*/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
Xbcd12345
0: bcd12345
/abcde/I
Capturing subpattern 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
** Failers\=ps
No match
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
Capturing subpattern count = 3
Compile options: <none>
Overall options: anchored
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
** Failers\=ps
No match
\=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
Capturing subpattern count = 0
Starting code units: 0 A
Last code unit = 'C'
Subject length lower bound = 3
/\d{3,}ABC/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
Starting code units: a b c
Last code unit = 'E'
Subject length lower bound = 3
/[abc]?123/I
Capturing subpattern 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
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
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
*** Failers
No match
1X
No match
123456\=ps
No match
"<(\w+)/?>(.)*</(\1)>"Igms
Capturing subpattern count = 3
Max back reference = 1
Options: multiline dotall
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
Capturing subpattern 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
Capturing subpattern 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
** Failers
No match
line one\nthis is a line\nbreak in the second line
No match
/line\nbreak/Im,firstline
Capturing subpattern count = 0
Contains explicit CR or LF match
Options: multiline firstline
First code unit = 'l'
Last code unit = 'k'
Subject length lower bound = 10
this is a line\nbreak
0: line\x0abreak
** Failers
No match
line one\nthis is a line\nbreak in the second line
No match
/(?i)(?-i)AbCd/I
Capturing subpattern count = 0
First code unit = 'A'
Last code unit = 'd'
Subject length lower bound = 4
AbCd
0: AbCd
** Failers
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
Capturing subpattern 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
Capturing subpattern count = 12
Max back reference = 11
Named capturing subpatterns:
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
Capturing subpattern 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
Capturing subpattern count = 101
Named capturing subpatterns:
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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/[^()]*(?:\((?R)\))*[^()]*/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0: (this(and)that)
/(?:\((?R)\))*[^()]*/I
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
(this(and)that
0:
(this(and)that)
0:
((this))
0: ((this))
/(?:\((?R)\))|[^()]*/I
Capturing subpattern 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
Capturing subpattern count = 0
First code unit = \xff
Subject length lower bound = 1
/^((?P<A>a1)|(?P<A>a2)b)/I
Failed: error 143 at offset 17: two named subpatterns have the same name (PCRE2_DUPNAMES not set)
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Compile options: dupnames
Overall options: anchored dupnames
Subject length lower bound = 2
a1b\=copy=A
0: a1
1: a1
2: a1
C a1 (2) A
a2b\=copy=A
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A
** Failers
No match
a1b\=copy=Z,copy=A
0: a1
1: a1
2: a1
copy substring 'Z' failed (-47): unknown or unset substring
C a1 (2) A
/(?|(?<a>)(?<b>)(?<a>)|(?<a>)(?<b>)(?<a>))/I,dupnames
Capturing subpattern count = 3
Named capturing subpatterns:
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
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Compile options: dupnames
Overall options: anchored dupnames
Subject length lower bound = 2
ab\=copy=A
0: ab
1: a
2: b
C a (1) A
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: dupnames
Subject length lower bound = 2
ab\=copy=A
0: ab
1: a
2: b
C a (1) A
cd\=copy=A
0: cd
copy substring 'A' failed (-47): unknown or unset substring
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
A 2
A 3
A 4
Options: dupnames
Subject length lower bound = 2
cdefgh\=copy=A
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
C ef (2) A
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Compile options: dupnames
Overall options: anchored dupnames
Subject length lower bound = 2
a1b\=get=A
0: a1
1: a1
2: a1
G a1 (2) A
a2b\=get=A
0: a2b
1: a2b
2: <unset>
3: a2
G a2 (2) A
** Failers
No match
a1b\=get=Z,get=A
0: a1
1: a1
2: a1
get substring 'Z' failed (-47): unknown or unset substring
G a1 (2) A
/^(?P<A>a)(?P<A>b)/I,dupnames
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Compile options: dupnames
Overall options: anchored dupnames
Subject length lower bound = 2
ab\=get=A
0: ab
1: a
2: b
G a (1) A
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
Capturing subpattern count = 2
Named capturing subpatterns:
A 1
A 2
Options: dupnames
Subject length lower bound = 2
ab\=get=A
0: ab
1: a
2: b
G a (1) A
cd\=get=A
0: cd
get substring 'A' failed (-47): unknown or unset substring
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
A 2
A 3
A 4
Options: dupnames
Subject length lower bound = 2
cdefgh\=get=A
0: cdefgh
1: <unset>
2: <unset>
3: ef
4: gh
G ef (2) A
/(?J)^((?P<A>a1)|(?P<A>a2)b)/I
Capturing subpattern count = 3
Named capturing subpatterns:
A 2
A 3
Compile options: <none>
Overall options: anchored dupnames
Duplicate name status changes
Subject length lower bound = 2
a1b\=copy=A
0: a1
1: a1
2: a1
C a1 (2) A
a2b\=copy=A
0: a2b
1: a2b
2: <unset>
3: a2
C a2 (2) A
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<A>d)/I
Failed: error 143 at offset 37: 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 pcre_get_named_substring() produces
a random value. /Ix
Capturing subpattern count = 1
Options: extended
First code unit = 'I'
Last code unit = 'e'
Subject length lower bound = 141
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<C>d)/I
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
B 2
B 3
C 4
Compile options: <none>
Overall options: anchored
Duplicate name status changes
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
C b (1) B
C d (1) C
/^(?P<A>a)?(?(A)a|b)/I
Capturing subpattern count = 1
Named capturing subpatterns:
A 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 1
aabc
0: aa
1: a
bc
0: b
** Failers
No match
abc
No match
/(?:(?(ZZ)a|b)(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
ZZ 1
Last code unit = 'X'
Subject length lower bound = 2
bXaX
0: bXaX
1: X
/(?:(?(2y)a|b)(X))+/I
Failed: error 126 at offset 7: malformed number or name after (?(
/(?:(?(ZA)a|b)(?P<ZZ>X))+/I
Failed: error 115 at offset 9: reference to non-existent subpattern
/(?:(?(ZZ)a|b)(?(ZZ)a|b)(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
ZZ 1
Last code unit = 'X'
Subject length lower bound = 3
bbXaaX
0: bbXaaX
1: X
/(?:(?(ZZ)a|\(b\))\\(?P<ZZ>X))+/I
Capturing subpattern count = 1
Named capturing subpatterns:
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
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
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
Capturing subpattern count = 10
Max back reference = 10
Named capturing subpatterns:
A 10
Subject length lower bound = 2
bXXaYYaY
0: bXXaYYaY
1:
2:
3:
4:
5:
6:
7:
8:
9:
10: Y
/\s*,\s*/I
Capturing subpattern 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
Capturing subpattern 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
** Failers
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
Capturing subpattern 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
** Failers
No match
xyz\nabclf
No match
xyz\rabclf
No match
/^abc/Im,newline=cr
Capturing subpattern 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
** Failers
No match
xyz\nabc
No match
xyz\r\nabc
No match
/^abc/Im,newline=bad
** Invalid value in 'newline=bad'
/.*/I,newline=lf
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 1
Named capturing subpatterns:
B 1
Starting code units: 0 1 2 3 4 5 6 7 8 9
Last code unit = '.'
Subject length lower bound = 7
/()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
(.(.))/Ix
Capturing subpattern 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
Capturing subpattern count = 1
Starting code units: C a b c d
Subject length lower bound = 1
/()[ab]xyz/I
Capturing subpattern count = 1
Starting code units: a b
Last code unit = 'z'
Subject length lower bound = 4
/(|)[ab]xyz/I
Capturing subpattern count = 1
Starting code units: a b
Last code unit = 'z'
Subject length lower bound = 4
/(|c)[ab]xyz/I
Capturing subpattern count = 1
Starting code units: a b c
Last code unit = 'z'
Subject length lower bound = 4
/(|c?)[ab]xyz/I
Capturing subpattern count = 1
Starting code units: a b c
Last code unit = 'z'
Subject length lower bound = 4
/(d?|c?)[ab]xyz/I
Capturing subpattern count = 1
Starting code units: a b c d
Last code unit = 'z'
Subject length lower bound = 4
/(d?|c)[ab]xyz/I
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'b'
Subject length lower bound = 2
/^a*+b\d/IB
------------------------------------------------------------------
Bra
^
a*+
b
\d
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'b'
Subject length lower bound = 2
/^a*?b\d/IB
------------------------------------------------------------------
Bra
^
a*+
b
\d
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'b'
Subject length lower bound = 2
/^a+A\d/IB
------------------------------------------------------------------
Bra
^
a++
A
\d
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Last code unit = 'A'
Subject length lower bound = 3
aaaA5
0: aaaA5
** Failers
No match
aaaa5
No match
/^a*A\d/IBi
------------------------------------------------------------------
Bra
^
/i a*
/i A
\d
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
Compile options: caseless
Overall options: anchored caseless
Last code unit = 'A' (caseless)
Subject length lower bound = 2
aaaA5
0: aaaA5
aaaa5
0: aaaa5
/(a*|b*)[cd]/I
Capturing subpattern count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a+|b*)[cd]/I
Capturing subpattern count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a*|b+)[cd]/I
Capturing subpattern count = 1
Starting code units: a b c d
Subject length lower bound = 1
/(a+|b+)[cd]/I
Capturing subpattern count = 1
Starting code units: a b
Subject length lower bound = 2
/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
(((
a
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
)))
/Ix
Capturing subpattern 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
Capturing subpattern count = 2
Named capturing subpatterns:
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
C y (1) xyz
/(?<abc>x)(?'xyz'y)/I
Capturing subpattern count = 2
Named capturing subpatterns:
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
C y (1) xyz
/(?<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
** Failers
No match
aXaX
No match
aXbX
No match
/^(?P>abc)(?<abcd>xxx)/
Failed: error 115 at offset 8: 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
** Failers
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
** Failers
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
Capturing subpattern count = 4
Max back reference = 4
Named capturing subpatterns:
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
*** Failers
No match
The quick brown fox
No match
/(?=(\w+))\1:/I
Capturing subpattern 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
Capturing subpattern count = 1
Max back reference = 1
Named capturing subpatterns:
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
** Failers
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
** Failers
No match
bddd
No match
/(?(<bc))/
Failed: error 126 at offset 6: malformed number or name after (?(
/(?(''))/
Failed: error 128 at offset 4: assertion expected after (?(
/(?('R')stuff)/
Failed: error 115 at offset 7: 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 29: reference to non-existent subpattern
/^(?(DEFINE) abc | xyz ) /x
Failed: error 154 at offset 22: DEFINE group contains more than one branch
/(?(DEFINE) abc) xyz/Ix
Capturing subpattern count = 0
Options: extended
First code unit = 'x'
Last code unit = 'z'
Subject length lower bound = 3
/(a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=ovector=0
No match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4\=ovector=0
Matched, but too many substrings
0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
/^a.b/newline=lf
a\rb
0: a\x0db
** Failers
No match
a\nb
No match
/^a.b/newline=cr
a\nb
0: a\x0ab
** Failers
No match
a\rb
No match
/^a.b/newline=anycrlf
a\x85b
0: a\x85b
** Failers
No match
a\rb
No match
/^a.b/newline=any
** Failers
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
** Failers
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
** Failers
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
** Failers
No match
a\n\n\n\rb
No match
a\r
No match
/(?&abc)X(?<abc>P)/I
Capturing subpattern count = 1
Named capturing subpatterns:
abc 1
Last code unit = 'P'
Subject length lower bound = 3
abcPXP123
0: PXP
1: P
/(?1)X(?<abc>P)/I
Capturing subpattern count = 1
Named capturing subpatterns:
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
DEFabcABCXYZ
No match
/(abc)(?:(?i)(?1))/
defabcabcxyz
0: abcabc
1: abc
DEFabcABCXYZ
No match
/^(a)\g-2/
Failed: error 115 at offset 7: reference to non-existent subpattern
/^(a)\g/
Failed: error 158 at offset 5: a numbered reference must not be zero
/^(a)\g{0}/
Failed: error 158 at offset 8: a numbered reference must not be zero
/^(a)\g{3/
Failed: error 157 at offset 8: \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 9: reference to non-existent subpattern
/^a.b/newline=lf
a\rb
0: a\x0db
*** Failers
No match
a\nb
No match
/.+foo/
afoo
0: afoo
** Failers
No match
\r\nfoo
No match
\nfoo
No match
/.+foo/newline=crlf
afoo
0: afoo
\nfoo
0: \x0afoo
** Failers
No match
\r\nfoo
No match
/.+foo/newline=any
afoo
0: afoo
** Failers
No match
\nfoo
No match
\r\nfoo
No match
/.+foo/s
afoo
0: afoo
\r\nfoo
0: \x0d\x0afoo
\nfoo
0: \x0afoo
/^$/gm,newline=any
abc\r\rxyz
0:
abc\n\rxyz
0:
** Failers
No match
abc\r\nxyz
No match
/(?m)^$/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
** Failers
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
** Failers
No match
xyabc
No match
/x(?-0)y/
Failed: error 158 at offset 5: a numbered reference must not be zero
/x(?-1)y/
Failed: error 115 at offset 5: reference to non-existent subpattern
/x(?+0)y/
Failed: error 158 at offset 5: a numbered reference must not be zero
/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
** Failers
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
** Failers
No match
XabcXabc
No match
/(?(-1)a)/B
Failed: error 115 at offset 6: 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 7: 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
** Failers
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
------------------------------------------------------------------
** Failers
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
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
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
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
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
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
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
/(?i:A{1,}\6666666666)/
Failed: error 161 at offset 19: number is too big
/\g6666666666/
Failed: error 161 at offset 11: 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
\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
** Failers
No match
a\rb
No match
/(*CR)a.b/newline=lf
a\nb
0: a\x0ab
** Failers
No match
a\rb
No match
/(*LF)a.b/newline=CRLF
a\rb
0: a\x0db
** Failers
No match
a\nb
No match
/(*CRLF)a.b/
a\rb
0: a\x0db
a\nb
0: a\x0ab
** Failers
No match
a\r\nb
No match
/(*ANYCRLF)a.b/newline=CR
** Failers
No match
a\rb
No match
a\nb
No match
a\r\nb
No match
/(*ANY)a.b/newline=cr
** Failers
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:
/a\Rb/I,bsr=anycrlf
Capturing subpattern 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
** Failers
No match
a\x85b
No match
a\x0bb
No match
/a\Rb/I,bsr=unicode
Capturing subpattern 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
Capturing subpattern 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
** Failers
No match
a\x85b
No match
a\x0bb
No match
/a\R?b/I,bsr=unicode
Capturing subpattern 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
Capturing subpattern 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
** Failers
No match
a\x85\x85b
No match
a\x0b\x0bb
No match
/a\R{2,4}b/I,bsr=unicode
Capturing subpattern 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
** Failers
No match
a\r\r\r\r\rb
No match
/(*BSR_ANYCRLF)a\Rb/I
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern 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 12: reference to non-existent subpattern
/(?<a>)(?&aaaaaaaaaaaaaaaaaaaaaaa)/
Failed: error 115 at offset 32: reference to non-existent subpattern
/(?+-a)/
Failed: error 163 at offset 3: digit expected after (?+
/(?-+a)/
Failed: error 111 at offset 3: unrecognized character after (? or (?-
/(?(-1))/
Failed: error 115 at offset 6: reference to non-existent subpattern
/(?(+10))/
Failed: error 115 at offset 7: reference to non-existent subpattern
/(?(10))/
Failed: error 115 at offset 6: 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 5: \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
/(?!\w)(?R)/
Failed: error 140 at offset 9: recursion could loop indefinitely
/(?=\w)(?R)/
Failed: error 140 at offset 9: recursion could loop indefinitely
/(?<!\w)(?R)/
Failed: error 140 at offset 10: recursion could loop indefinitely
/(?<=\w)(?R)/
Failed: error 140 at offset 10: recursion could loop indefinitely
/[[: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 15: \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
** Failers
No match
xxz
No match
/(\3)(\1)(a)/
cat
No match
/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
cat
0: a
1:
2:
3: a
/TA]/
The ACTA] comes
0: TA]
/TA]/alt_bsux,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
** Failers
No match
abcXabc
No match
/(?1)[^]a()b](abc)/
abcXabc
0: abcXabc
1: abc
** Failers
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 4: reference to non-existent subpattern
abc<abc
/(?&N)[]a(?<N>)](abc)/
Failed: error 115 at offset 4: 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/alt_bsux,allow_empty_class,match_unset_backref,dupnames
** Failers
No match
ab
No match
/a[]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
** Failers
No match
ab
No match
/a[]*+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
** Failers
No match
ab
No match
/a[^]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aXb
0: aXb
a\nb
0: a\x0ab
** Failers
No match
ab
No match
/a[^]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aXb
0: aXb
a\nX\nXb
0: a\x0aX\x0aXb
** Failers
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: nothing to repeat
/(abc|pqr|123){0}[xyz]/I
Capturing subpattern count = 1
Starting code units: x y z
Subject length lower bound = 1
/(?(?=.*b)b|^)/I,auto_callout
Capturing subpattern count = 0
May match empty string
Options: auto_callout
Subject length lower bound = 0
adc
--->adc
+0 ^ (?(?=.*b)b|^)
+2 ^ (?=.*b)
+5 ^ .*
+7 ^ ^ b
+7 ^ ^ b
+7 ^^ b
+7 ^ b
+11 ^ ^
+12 ^ )
+13 ^
0:
abc
--->abc
+0 ^ (?(?=.*b)b|^)
+2 ^ (?=.*b)
+5 ^ .*
+7 ^ ^ b
+7 ^ ^ b
+7 ^^ b
+8 ^ ^ )
+9 ^ b
+0 ^ (?(?=.*b)b|^)
+2 ^ (?=.*b)
+5 ^ .*
+7 ^ ^ b
+7 ^^ b
+7 ^ b
+8 ^^ )
+9 ^ b
+10 ^^ |
+13 ^^
0: b
/(?(?=b).*b|^d)/I
Capturing subpattern count = 0
Subject length lower bound = 1
/(?(?=.*b).*b|^d)/I
Capturing subpattern count = 0
First code unit at start or follows newline
Subject length lower bound = 1
/xyz/auto_callout
xyz
--->xyz
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^
0: xyz
abcxyz
--->abcxyz
+0 ^ x
+1 ^^ y
+2 ^ ^ z
+3 ^ ^
0: xyz
** Failers
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 ^ ^
0: xyz
** Failers
--->** Failers
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
+0 ^ x
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 ^ ^
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 ^ ^
0: xyz
/^"((?(?=[a])[^"])|b)*"$/auto_callout
"ab"
--->"ab"
+0 ^ ^
+1 ^ "
+2 ^^ ((?(?=[a])[^"])|b)*
+3 ^^ (?(?=[a])[^"])
+5 ^^ (?=[a])
+8 ^^ [a]
+11 ^ ^ )
+12 ^^ [^"]
+16 ^ ^ )
+17 ^ ^ |
+3 ^ ^ (?(?=[a])[^"])
+5 ^ ^ (?=[a])
+8 ^ ^ [a]
+17 ^ ^ |
+21 ^ ^ "
+18 ^ ^ b
+19 ^ ^ )
+3 ^ ^ (?(?=[a])[^"])
+5 ^ ^ (?=[a])
+8 ^ ^ [a]
+17 ^ ^ |
+21 ^ ^ "
+22 ^ ^ $
+23 ^ ^
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/
++++123999\=ps
Partial match: 123999
++++123999Y\=ps
0: 999Y
++++Z1234\=ps
0: Z
/Z(*F)/
Z\=ps
No match
ZA\=ps
No match
/Z(?!)/
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/
xyzabc123pqr
0: 123
xyzabc12\=ps
Partial match: abc12
xyzabc12\=ph
Partial match: abc12
/(?<=abc)123/
xyzabc123pqr
0: 123
xyzabc12\=ps
Partial match: abc12
<<<
xyzabc12\=ph
Partial match: abc12
<<<
/\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
abcdef
0:
0+ def
abcdef\=notempty_atstart
0:
0+ def
xyzabcdef\=notempty_atstart
0:
0+ def
** Failers
No match
abcdef\=notempty
No match
xyzabcdef\=notempty
No match
/^(?:(?=abc)|abc\K)/aftertext
abcdef
0:
0+ abcdef
abcdef\=notempty_atstart
0:
0+ def
** Failers
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
** Failers
0:
0+ ** Failers
xyz\=notempty
No match
/^a?b?/aftertext
xyz
0:
0+ xyz
xyzabc
0:
0+ xyzabc
** Failers
0:
0+ ** Failers
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
** Failers
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)/
Failed: error 125 at offset 10: lookbehind assertion is not fixed length
/(a)(?<=b+(?1))/
Failed: error 125 at offset 13: lookbehind assertion is not fixed length
/(a+)(?<=b(?1))/
Failed: error 125 at offset 14: lookbehind assertion is not fixed length
/(a(?<=b(?1)))/
Failed: error 125 at offset 13: 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 26: lookbehind assertion is not fixed length
/(a|bc)\1/I
Capturing subpattern count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bc)\1{2,3}/I
Capturing subpattern count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 3
/(a|bc)(?1)/I
Capturing subpattern count = 1
Starting code units: a b
Subject length lower bound = 2
/(a|b\1)(a|b\1)/I
Capturing subpattern count = 2
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|b\1){2}/I
Capturing subpattern count = 1
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bbbb\1)(a|bbbb\1)/I
Capturing subpattern count = 2
Max back reference = 1
Starting code units: a b
Subject length lower bound = 2
/(a|bbbb\1){2}/I
Capturing subpattern 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
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
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
Capturing subpattern count = 11
Options: caseless dotall
First code unit = '<'
Last code unit = '>'
Subject length lower bound = 47
"(?>.*/)foo"I
Capturing subpattern 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
Capturing subpattern count = 0
Options: extended
Last code unit = '-'
Subject length lower bound = 8
/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/Ii
Capturing subpattern 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
Capturing subpattern 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
Capturing subpattern count = 3
Max back reference = 1
Options: caseless extended dotall
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
Capturing subpattern count = 1
Compile options: caseless extended
Overall options: anchored caseless extended
Last code unit = ':'
Subject length lower bound = 2
/(?|(?<a>A)|(?<a>B))/I
Capturing subpattern count = 1
Named capturing subpatterns:
a 1
Starting code units: A B
Subject length lower bound = 1
AB\=copy=a
0: A
1: A
C A (1) a
BA\=copy=a
0: B
1: B
C B (1) a
/(?|(?<a>A)|(?<b>B))/
Failed: error 165 at offset 15: 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
Capturing subpattern count = 6
Named capturing subpatterns:
apostrophe 2
apostrophe 5
quote 1
quote 4
realquote 3
realquote 6
Options: extended dupnames
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: "
** Failers
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
------------------------------------------------------------------
Capturing subpattern count = 4
Named capturing subpatterns:
D 4
D 1
Compile options: extended dupnames
Overall options: anchored extended dupnames
Subject length lower bound = 2
abcdX
0: abcdX
1: a
2: b
3: c
4: d
eX
0: eX
1: e
** Failers
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
------------------------------------------------------------------
Capturing subpattern count = 4
Named capturing subpatterns:
A 1
A 4
Options: extended dupnames
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
abcdd
0: abcdd
1: a
2: b
3: c
4: dd
** Failers
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
# This is not in the Perl-compatible test because Perl seems currently to be
# broken and not behaving as specified in that it *does* bumpalong after
# hitting (*COMMIT).
/(?1)(A(*COMMIT)|B)D/
ABD
0: ABD
1: B
XABD
0: ABD
1: B
BAD
0: BAD
1: A
ABXABD
0: ABD
1: B
** Failers
No match
ABX
No match
BAXBAD
No match
/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
cat
0: a
1:
2:
3: a
/(\3)(\1)(a)/I,alt_bsux,allow_empty_class,match_unset_backref,dupnames
Capturing subpattern count = 3
Max back reference = 3
Options: dupnames alt_bsux allow_empty_class match_unset_backref
Last code unit = 'a'
Subject length lower bound = 1
cat
0: a
1:
2:
3: a
/(\3)(\1)(a)/I
Capturing subpattern count = 3
Max back reference = 3
Last code unit = 'a'
Subject length lower bound = 3
cat
No match
/i(?(DEFINE)(?<s>a))/I
Capturing subpattern count = 1
Named capturing subpatterns:
s 1
First code unit = 'i'
Subject length lower bound = 1
i
0: i
/()i(?(1)a)/I
Capturing subpattern count = 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
** Failers
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
^
Once
CBra 1
ab
CBra 2
c
\1
Ket
d
Alt
x
Ket
Ket
Once
CBra 1
ab
CBra 2
c
\1
Ket
d
Alt
x
Ket
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
Once
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
0: ab
1: ab
/(?P<L1>(?P<L2>0|)|(?P>L2)(?P>L1))/
Failed: error 140 at offset 31: recursion could loop indefinitely
/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
/abc(*FAIL:123)xyz/
Failed: error 159 at offset 13: an argument is not allowed for (*ACCEPT), (*FAIL), or (*COMMIT)
# 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.
/A(*COMMIT)B/aftertext,mark
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
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
** Failers
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
** Failers
No match
DEFGABC
No match
/^(ab (c+(*THEN)cd) | xyz)/x
abcccd
No match
/^(ab (c+(*PRUNE)cd) | xyz)/x
abcccd
No match
/^(ab (c+(*FAIL)cd) | xyz)/x
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
*** Failers
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
*** Failers
No match
A\nB
No match
/A\NB/newline=crlf
A\nB
0: A\x0aB
A\rB
0: A\x0dB
** Failers
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
------------------------------------------------------------------
X\x0d\x0a
No match
/(?<=abc)def/
abc\=ph
Partial match: abc
<<<
/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
No match
abc\=ps
Partial match: abc
abc\=ph
Partial match: abc
/.+/
abc\=offset=0
0: abc
abc\=offset=1
0: bc
abc\=offset=2
0: c
abc\=offset=3
No match
abc\=offset=4
Failed: error -33: bad offset value
abc\=offset=-4
** Invalid value in 'offset=-4'
/^\cģ/
Failed: error 168 at offset 3: \c must be followed by a printable ASCII character
/(?P<abn>(?P=abn)xxx)/B
------------------------------------------------------------------
Bra
Once
CBra 1
\1
xxx
Ket
Ket
Ket
End
------------------------------------------------------------------
/(a\1z)/B
------------------------------------------------------------------
Bra
Once
CBra 1
a
\1
z
Ket
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 15: 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
** Failers
No match
aaaa
No match
/^(?:a)*+(\w)/
aaaaX
0: aaaaX
1: X
** Failers
No match
aaaa
No match
/(a)++1234/IB
------------------------------------------------------------------
Bra
CBraPos 1
a
KetRpos
1234
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 1
First code unit = 'a'
Last code unit = '4'
Subject length lower bound = 5
/([abc])++1234/I
Capturing subpattern count = 1
Starting code units: a b c
Last code unit = '4'
Subject length lower bound = 5
/(?<=(abc)+)X/
Failed: error 125 at offset 10: lookbehind assertion is not fixed length
/(^ab)/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
/(^ab)++/I
Capturing subpattern count = 1
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
/(^ab|^)+/I
Capturing subpattern count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(^ab|^)++/I
Capturing subpattern count = 1
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(?:^ab)/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
/(?:^ab)++/I
Capturing subpattern count = 0
Compile options: <none>
Overall options: anchored
Subject length lower bound = 2
/(?:^ab|^)+/I
Capturing subpattern count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(?:^ab|^)++/I
Capturing subpattern count = 0
May match empty string
Compile options: <none>
Overall options: anchored
Subject length lower bound = 0
/(.*ab)/I
Capturing subpattern count = 1
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(.*ab)++/I
Capturing subpattern count = 1
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(.*ab|.*)+/I
Capturing subpattern count = 1
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(.*ab|.*)++/I
Capturing subpattern count = 1
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?:.*ab)/I
Capturing subpattern count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(?:.*ab)++/I
Capturing subpattern count = 0
First code unit at start or follows newline
Last code unit = 'b'
Subject length lower bound = 2
/(?:.*ab|.*)+/I
Capturing subpattern count = 0
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?:.*ab|.*)++/I
Capturing subpattern count = 0
May match empty string
First code unit at start or follows newline
Subject length lower bound = 0
/(?=a)[bcd]/I
Capturing subpattern count = 0
First code unit = 'a'
Subject length lower bound = 1
/((?=a))[bcd]/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/((?=a))+[bcd]/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/((?=a))++[bcd]/I
Capturing subpattern count = 1
First code unit = 'a'
Subject length lower bound = 1
/(?=a+)[bcd]/Ii
Capturing subpattern count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a+?)[bcd]/Ii
Capturing subpattern count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a++)[bcd]/Ii
Capturing subpattern count = 0
Options: caseless
First code unit = 'a' (caseless)
Subject length lower bound = 1
/(?=a{3})[bcd]/Ii
Capturing subpattern count = 0
Options: caseless
First code unit = 'a' (caseless)
Last code unit = 'a' (caseless)
Subject length lower bound = 1
/(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
** Failers
No match
b
No match
/(?1)(?:((*ACCEPT))){0}c/
c
0: c
c\=notempty
0: c
/^.*?(?(?=a)a|b(*THEN)c)/
ba
No match
/^.*?(?(?=a)a|bc)/
ba
0: ba
/^.*?(?(?=a)a(*THEN)b|c)/
ac
No match
/^.*?(?(?=a)a(*THEN)b)c/
ac
No match
/^.*?(a(*THEN)b)c/
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
D
No match, mark = A
/(*:A)A+(*SKIP:A)(B|Z)/mark
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:
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
Capturing subpattern count = 2
Subject length lower bound = 1
/(a(?2)|b)(b(?1)|a)(?:(?1)|(?2))/I
Capturing subpattern count = 2
Starting code units: a b
Subject length lower bound = 3
/(a(?2)|b)(b(?1)|a)(?1)(?2)/I
Capturing subpattern count = 2
Starting code units: a b
Subject length lower bound = 4
/(abc)(?1)/I
Capturing subpattern 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
Matched, but too many substrings
0: fooX
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
abc
Ket
End
------------------------------------------------------------------
/(?=abc)+abc/B
------------------------------------------------------------------
Bra
Assert
abc
Ket
abc
Ket
End
------------------------------------------------------------------
/(?=abc)++abc/B
------------------------------------------------------------------
Bra
Assert
abc
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
AssertB
Reverse
CBra 1
abc
Ket
Ket
xyz
Ket
End
------------------------------------------------------------------
/[:a[:abc]b:]/B
------------------------------------------------------------------
Bra
[:[a-c]
b:]
Ket
End
------------------------------------------------------------------
/(a+|(?R)b)/
Failed: error 140 at offset 7: recursion could loop indefinitely
/^(a(*:A)(d|e(*:B))z|aeq)/auto_callout
adz
--->adz
+0 ^ ^
+1 ^ (a(*:A)(d|e(*:B))z|aeq)
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (d|e(*:B))
Latest Mark: A
+9 ^^ d
+10 ^ ^ |
+18 ^ ^ z
+19 ^ ^ |
+24 ^ ^
0: adz
1: adz
2: d
aez
--->aez
+0 ^ ^
+1 ^ (a(*:A)(d|e(*:B))z|aeq)
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (d|e(*:B))
Latest Mark: A
+9 ^^ d
+11 ^^ e
+12 ^ ^ (*:B)
+17 ^ ^ )
Latest Mark: B
+18 ^ ^ z
+19 ^ ^ |
+24 ^ ^
0: aez
1: aez
2: e
aeqwerty
--->aeqwerty
+0 ^ ^
+1 ^ (a(*:A)(d|e(*:B))z|aeq)
+2 ^ a
+3 ^^ (*:A)
+8 ^^ (d|e(*:B))
Latest Mark: A
+9 ^^ d
+11 ^^ e
+12 ^ ^ (*:B)
+17 ^ ^ )
Latest Mark: B
+18 ^ ^ z
+20 ^ a
+21 ^^ e
+22 ^ ^ q
+23 ^ ^ )
+24 ^ ^
0: aeq
1: aeq
/.(*F)/
abc\=ph
No match
/\btype\b\W*?\btext\b\W*?\bjavascript\b/I
Capturing subpattern 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
Capturing subpattern count = 0
Max lookbehind = 1
Starting code units: < o t u
Subject length lower bound = 8
/a(*SKIP)c|b(*ACCEPT)|/I,aftertext
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
a
0:
0+
/a(*SKIP)c|b(*ACCEPT)cd(*ACCEPT)|x/I
Capturing subpattern count = 0
Starting code units: a b x
Subject length lower bound = 0
ax
0: x
'a*(*ACCEPT)b'aftertext
\=notempty_atstart
No match
abc\=notempty_atstart
0: a
0+ bc
bbb\=notempty_atstart
0:
0+ bb
/(*ACCEPT)a/I,aftertext
Capturing subpattern count = 0
Subject length lower bound = 0
bax
0:
0+ bax
/z(*ACCEPT)a/I,aftertext
Capturing subpattern count = 0
First code unit = 'z'
Subject length lower bound = 0
baxzbx
0: z
0+ bx
/^(?>a+)(?>(z+))\w/B
------------------------------------------------------------------
Bra
^
Once_NC
a++
Ket
Once
CBra 1
z++
Ket
Ket
\w
Ket
End
------------------------------------------------------------------
aaaazzzzb
0: aaaazzzzb
1: zzzz
** Failers
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))/
baa
No match
/(?P<abn>(?P=abn)xxx)/B
------------------------------------------------------------------
Bra
Once
CBra 1
\1
xxx
Ket
Ket
Ket
End
------------------------------------------------------------------
/(a\1z)/B
------------------------------------------------------------------
Bra
Once
CBra 1
a
\1
z
Ket
Ket
Ket
End
------------------------------------------------------------------
/^a\x41z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
0: aAz
*** Failers
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
*** Failers
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
*** Failers
No match
aAz
No match
/^a\U0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aU0041z
0: aU0041z
*** Failers
No match
aAz
No match
/(?(?=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 3: \N is not supported in a class
aNc
/a[B-\Nc]/
Failed: error 150 at offset 5: invalid range in character class
/a[B\Nc]/
Failed: error 171 at offset 4: \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
** Failers
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
** Failers
No match, mark = n
abc
No match, mark = m
/(q|b)(*:m)f|a(*:n)w/mark
aw
0: aw
MK: n
** Failers
No match, mark = n
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
Capturing subpattern count = 0
Max lookbehind = 2
Last code unit = 'a'
Subject length lower bound = 1
/(?:.*?a)(?<=ba)/I
Capturing subpattern 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
Capturing subpattern count = 0
Last code unit = 'b'
Subject length lower bound = 2
/.*?a(*PRUNE)b/Is
Capturing subpattern count = 0
Options: dotall
Last code unit = 'b'
Subject length lower bound = 2
/^a(*PRUNE)b/Is
Capturing subpattern count = 0
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 2
/.*?a(*SKIP)b/I
Capturing subpattern count = 0
Last code unit = 'b'
Subject length lower bound = 2
/(?>.*?a)b/Is
Capturing subpattern count = 0
Options: dotall
Last code unit = 'b'
Subject length lower bound = 2
/(?>.*?a)b/I
Capturing subpattern count = 0
Last code unit = 'b'
Subject length lower bound = 2
/(?>^a)b/Is
Capturing subpattern count = 0
Compile options: dotall
Overall options: anchored dotall
Subject length lower bound = 2
/(?>.*?)(?<=(abcd)|(wxyz))/I
Capturing subpattern count = 2
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
/(?>.*)(?<=(abcd)|(wxyz))/I
Capturing subpattern count = 2
Max lookbehind = 4
May match empty string
Subject length lower bound = 0
"(?>.*)foo"I
Capturing subpattern count = 0
Last code unit = 'o'
Subject length lower bound = 3
"(?>.*?)foo"I
Capturing subpattern count = 0
Last code unit = 'o'
Subject length lower bound = 3
/(?>^abc)/Im
Capturing subpattern count = 0
Options: multiline
First code unit at start or follows newline
Last code unit = 'c'
Subject length lower bound = 3
/(?>.*abc)/Im
Capturing subpattern count = 0
Options: multiline
Last code unit = 'c'
Subject length lower bound = 3
/(?:.*abc)/Im
Capturing subpattern 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
0: <unset>
1: a
--->aab
^ ^ b
Callout 1: last capture = 1
0: <unset>
1: a
--->aab
^^ b
Callout 2: last capture = 0
0: <unset>
--->aab
^ ^ b
0: aab
/(?:(a)++(?C1)bb|aa(?C2)b)/
aab\=callout_capture
Callout 1: last capture = 1
0: <unset>
1: a
--->aab
^ ^ b
Callout 2: last capture = 0
0: <unset>
--->aab
^ ^ b
0: aab
/(?:(?>(a))(?C1)bb|aa(?C2)b)/
aab\=callout_capture
Callout 1: last capture = 1
0: <unset>
1: a
--->aab
^^ b
Callout 2: last capture = 0
0: <unset>
--->aab
^ ^ b
0: aab
/(?:(?1)(?C1)x|ab(?C2))((a)){0}/
aab\=callout_capture
Callout 1: last capture = 0
0: <unset>
--->aab
^^ x
Callout 1: last capture = 0
0: <unset>
--->aab
^^ x
Callout 2: last capture = 0
0: <unset>
--->aab
^ ^ )
0: ab
/(?1)(?C1)((a)(?C2)){0}/
aab\=callout_capture
Callout 2: last capture = 2
0: <unset>
1: <unset>
2: a
--->aab
^^ )
Callout 1: last capture = 0
0: <unset>
--->aab
^^ ((a)(?C2)){0}
0: a
/(?:(a)+(?C1)bb|aa(?C2)b)++/
aab\=callout_capture
Callout 1: last capture = 1
0: <unset>
1: a
--->aab
^ ^ b
Callout 1: last capture = 1
0: <unset>
1: a
--->aab
^^ b
Callout 2: last capture = 0
0: <unset>
--->aab
^ ^ b
0: aab
aab\=callout_capture,ovector=1
Callout 1: last capture = 1
0: <unset>
--->aab
^ ^ b
Callout 1: last capture = 1
0: <unset>
--->aab
^^ b
Callout 2: last capture = 0
0: <unset>
--->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: 123a
<<<
xxxx123a\=ps
Partial match, mark=xx: 123a
<<<
/123\Kabc/
xxxx123a\=ph
Partial match: 123a
xxxx123a\=ps
Partial match: 123a
/^(?(?=a)aa|bb)/auto_callout
bb
--->bb
+0 ^ ^
+1 ^ (?(?=a)aa|bb)
+3 ^ (?=a)
+6 ^ a
+11 ^ b
+12 ^^ b
+13 ^ ^ )
+14 ^ ^
0: bb
/(?C1)^(?C2)(?(?C99)(?=(?C3)a(?C4))(?C5)a(?C6)a(?C7)|(?C8)b(?C9)b(?C10))(?C11)/
bb
--->bb
1 ^ ^
2 ^ (?(?C99)(?=(?C3)a(?C4))(?C5)a(?C6)a(?C7)|(?C8)b(?C9)b(?C10))
99 ^ (?=(?C3)a(?C4))
3 ^ a
8 ^ b
9 ^^ b
10 ^ ^ )
11 ^ ^
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)../
ac
No match
ad
0: ad
/^(?=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
No match
/(?=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
Capturing subpattern count = 1
Named capturing subpatterns:
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
------------------------------------------------------------------
Capturing subpattern count = 3
Max back reference = 2
Named capturing subpatterns:
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.
/\D+\D \D+\d \D+\S \D+\s \D+\W \D+\w \D+. \D+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\w++
\R
\w+
\H
\w++
\h
\w+
\V
\w++
\v
\w++
\Z
\w++
\z
\w++
$
Ket
End
------------------------------------------------------------------
/\C+\D \C+\d \C+\S \C+\s \C+\W \C+\w \C+. \C+\C \C+\R \C+\H \C+\h \C+\V \C+\v \C+\Z \C+\z \C+$/Bx
------------------------------------------------------------------
Bra
AllAny+
\D
AllAny+
\d
AllAny+
\S
AllAny+
\s
AllAny+
\W
AllAny+
\w
AllAny+
Any
AllAny+
AllAny
AllAny+
\R
AllAny+
\H
AllAny+
\h
AllAny+
\V
AllAny+
\v
AllAny+
\Z
AllAny++
\z
AllAny+
$
Ket
End
------------------------------------------------------------------
/\R+\D \R+\d \R+\S \R+\s \R+\W \R+\w \R+. \R+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C \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+
AllAny
\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+\C 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+
AllAny
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+\C \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+
AllAny
\x0a+
\R
\x0a+
\H
\x0a++
\h
\x0a++
\V
\x0a+
\v
\x0a+
\Z
\x0a++
\z
\x0a+
$
Ket
End
------------------------------------------------------------------
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\C .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bx
------------------------------------------------------------------
Bra
Any+
\D
Any+
\d
Any+
\S
Any+
\s
Any+
\W
Any+
\w
Any+
Any
Any+
AllAny
Any++
\R
Any+
\H
Any+
\h
Any+
\V
Any+
\v
Any+
\Z
Any++
\z
Any+
$
Ket
End
------------------------------------------------------------------
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\C .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bsx
------------------------------------------------------------------
Bra
AllAny+
\D
AllAny+
\d
AllAny+
\S
AllAny+
\s
AllAny+
\W
AllAny+
\w
AllAny+
AllAny
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+$ \C+$ \R+$ \H+$ \h+$ \V+$ \v+$ a+$ \n+$ .+$ .+$/Bmx
------------------------------------------------------------------
Bra
\D+
/m $
\d++
/m $
\S++
/m $
\s+
/m $
\W+
/m $
\w++
/m $
AllAny+
/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_NC
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_NC
gg
Alt
hh
KetRmax
#
[a-f]*+
Brazero
Once_NC
gg
Alt
hh
Ket
#
[a-f]*
Brazero
Once_NC
gg
Alt
hh
KetRmax
a#
[a-f]*+
Brazero
Once_NC
gg
Alt
hh
KetRmax
h
Ket
End
------------------------------------------------------------------
/[a-c]*d/IB
------------------------------------------------------------------
Bra
[a-c]*+
d
Ket
End
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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
------------------------------------------------------------------
Capturing subpattern 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 3: 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 167 at offset 5: non-hex character in \x{} (closing brace missing?)
/[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 3: invalid range in character class
/[A-[:digit:]]+/
Failed: error 150 at offset 3: invalid range in character class
/[a-[.xxx.]]+/
Failed: error 150 at offset 3: invalid range in character class
/[a-[=xxx=]]+/
Failed: error 150 at offset 3: 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 4: invalid range in character class
/(?<0abc>xx)/
Failed: error 144 at offset 3: group name must start with a non-digit
/(?&1abc)xx(?<1abc>y)/
Failed: error 144 at offset 3: group 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: group name must start with a non-digit
/(?P<0abc>xx)/
Failed: error 144 at offset 4: group name must start with a non-digit
/\k<5ghj>/
Failed: error 144 at offset 3: group name must start with a non-digit
/\k'5ghj'/
Failed: error 144 at offset 3: group name must start with a non-digit
/\k{2fgh}/
Failed: error 144 at offset 3: group name must start with a non-digit
/(?P=8yuki)/
Failed: error 144 at offset 4: group name must start with a non-digit
/\g{4df}/
Failed: error 144 at offset 3: group name must start with a non-digit
/(?&1abc)xx(?<1abc>y)/
Failed: error 144 at offset 3: group name must start with a non-digit
/(?P>1abc)xx(?<1abc>y)/
Failed: error 144 at offset 4: group name must start with a non-digit
/\g'3gh'/
Failed: error 157 at offset 7: \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 7: \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: group name must start with a non-digit
/(?('4gh')abc)/
Failed: error 144 at offset 4: group name must start with a non-digit
/(?(4gh)abc)/
Failed: error 126 at offset 4: malformed number or name after (?(
/(?(R&6yh)abc)/
Failed: error 144 at offset 5: group name must start with a non-digit
/(((a\2)|(a*)\g<-1>))*a?/B
------------------------------------------------------------------
Bra
Brazero
SCBra 1
Once
CBra 2
CBra 3
a
\2
Ket
Alt
CBra 4
a*
Ket
Recurse
Ket
Ket
KetRmax
a?+
Ket
End
------------------------------------------------------------------
# Test the ugly "start or end of word" compatibility syntax.
/[[:<:]]red[[:>:]]/B
------------------------------------------------------------------
Bra
\b
Assert
\w
Ket
red
\b
AssertB
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
** Failers
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
abcd
Start of matched string is beyond its end - displaying from end to start.
0: ab
0+ abcd
/abcd/newline=lf,firstline
xx\nxabcd
No match
# Test stack guard external calls.
/(((a)))/stackguard=1
Failed: error 133 at offset 2: parentheses are too deeply nested (stack check)
/(((a)))/stackguard=2
Failed: error 133 at offset 3: parentheses are too deeply nested (stack check)
/(((a)))/stackguard=3
/(((((a)))))/
# End stack guard tests
/^\w+(?>\s*)(?<=\w)/B
------------------------------------------------------------------
Bra
^
\w+
Once_NC
\s*+
Ket
AssertB
Reverse
\w
Ket
Ket
End
------------------------------------------------------------------
/\othing/
Failed: error 155 at offset 1: missing opening brace after \o
/\o{}/
Failed: error 178 at offset 1: digits missing in \x{} or \o{}
/\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{}
/\x{whatever}/
Failed: error 167 at offset 3: non-hex character in \x{} (closing brace missing?)
/A\8B/
Failed: error 115 at offset 4: reference to non-existent subpattern
/A\9B/
Failed: error 115 at offset 4: 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
*** Failers
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
Capturing subpattern count = 0
Subject length lower bound = 2
yesno
0: yes
/(?(VERSION=8)yes){3}/BI,aftertext
------------------------------------------------------------------
Bra
Cond
Cond false
yes
Ket
Ket
End
------------------------------------------------------------------
Capturing subpattern count = 0
May match empty string
Subject length lower bound = 0
yesno
0:
0+ yesno
/(?(VERSION=8)yes|no){3}/I
Capturing subpattern count = 0
Subject length lower bound = 6
yesnononoyes
0: nonono
** Failers
No match
yesno
No match
/(?:(?<VERSION>abc)|xyz)(?(VERSION)yes|no)/I
Capturing subpattern count = 1
Named capturing subpatterns:
VERSION 1
Starting code units: a x
Subject length lower bound = 5
abcyes
0: abcyes
1: abc
xyzno
0: xyzno
** Failers
No match
abcno
No match
xyzyes
No match
/(?(VERSION<10)yes|no)/
Failed: error 179 at offset 10: syntax error in (?(VERSION condition
/(?(VERSION>10)yes|no)/
Failed: error 179 at offset 11: syntax error in (?(VERSION condition
/(?(VERSION>=10.0.0)yes|no)/
Failed: error 179 at offset 16: syntax error in (?(VERSION condition
/abcd/I
Capturing subpattern count = 0
First code unit = 'a'
Last code unit = 'd'
Subject length lower bound = 4
/abcd/I,no_start_optimize
Capturing subpattern count = 0
Options: no_start_optimize
Subject length lower bound = 0
/(|ab)*?d/I
Capturing subpattern 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
Capturing subpattern count = 1
Options: no_start_optimize
Last code unit = 'd'
Subject length lower bound = 0
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
# End of testinput2