blob: 071cca133d433819a166e222786f519610ed6cff [file] [log] [blame]
# This set of tests is not Perl-compatible. It checks on special features
# of PCRE2's API, error diagnostics, and the compiled code of some patterns.
# It also checks the non-Perl syntax that PCRE2 supports (Python, .NET,
# Oniguruma). There are also some tests where PCRE2 and Perl differ,
# either because PCRE2 can't be compatible, or there is a possible Perl
# bug.
# NOTE: This is a non-UTF set of tests. When UTF support is needed, use
# test 5.
#forbid_utf
#newline_default lf any anycrlf
# Test binary zeroes in the pattern
# /a\0B/ where 0 is a binary zero
/61 5c 00 62/B,hex
a\x{0}b
# /a0b/ where 0 is a binary zero
/61 00 62/B,hex
a\x{0}b
# /(?#B0C)DE/ where 0 is a binary zero
/28 3f 23 42 00 43 29 44 45/B,hex
DE
/(a)b|/I
/abc/I
abc
defabc
abc\=anchored
\= Expect no match
defabc\=anchored
ABC
/^abc/I
abc
abc\=anchored
\= Expect no match
defabc
defabc\=anchored
/a+bc/I
/a*bc/I
/a{3}bc/I
/(abc|a+z)/I
/^abc$/I
abc
\= Expect no match
def\nabc
/ab\idef/
/(?X)ab\idef/
/x{5,4}/
/z{65536}/
/[abcd/
/[\B]/B
/[\R]/B
/[\X]/B
/[z-a]/
/^*/
/(abc/
/(?# abc/
/(?z)abc/
/.*b/I
/.*?b/I
/cat|dog|elephant/I
this sentence eventually mentions a cat
this sentences rambles on and on for a while and then reaches elephant
/cat|dog|elephant/I
this sentence eventually mentions a cat
this sentences rambles on and on for a while and then reaches elephant
/cat|dog|elephant/Ii
this sentence eventually mentions a CAT cat
this sentences rambles on and on for a while to elephant ElePhant
/a|[bcd]/I
/(a|[^\dZ])/I
/(a|b)*[\s]/I
/(ab\2)/
/{4,5}abc/
/(a)(b)(c)\2/I
abcb
abcb\=ovector=0
abcb\=ovector=1
abcb\=ovector=2
abcb\=ovector=3
abcb\=ovector=4
/(a)bc|(a)(b)\2/I
abc
abc\=ovector=0
abc\=ovector=1
abc\=ovector=2
aba
aba\=ovector=0
aba\=ovector=1
aba\=ovector=2
aba\=ovector=3
aba\=ovector=4
/abc$/I,dollar_endonly
abc
\= Expect no match
abc\n
abc\ndef
/(a)(b)(c)(d)(e)\6/
/the quick brown fox/I
the quick brown fox
this is a line with the quick brown fox
/the quick brown fox/I,anchored
the quick brown fox
\= Expect no match
this is a line with the quick brown fox
/ab(?z)cd/
/^abc|def/I
abcdef
abcdef\=notbol
/.*((abc)$|(def))/I
defabc
defabc\=noteol
/)/
/a[]b/
/[^aeiou ]{3,}/I
co-processors, and for
/<.*>/I
abc<def>ghi<klm>nop
/<.*?>/I
abc<def>ghi<klm>nop
/<.*>/I,ungreedy
abc<def>ghi<klm>nop
/(?U)<.*>/I
abc<def>ghi<klm>nop
/<.*?>/I,ungreedy
abc<def>ghi<klm>nop
/={3,}/I,ungreedy
abc========def
/(?U)={3,}?/I
abc========def
/(?<!bar|cattle)foo/I
foo
catfoo
\= Expect no match
the barfoo
and cattlefoo
/(?<=a+)b/
/(?<=aaa|b{0,3})b/
/(?<!(foo)a\1)bar/
/(?i)abc/I
/(a|(?m)a)/I
/(?i)^1234/I
/(^b|(?i)^d)/I
/(?s).*/I
/[abcd]/I
/(?i)[abcd]/I
/(?m)[xy]|(b|c)/I
/(^a|^b)/Im
/(?i)(^a|^b)/Im
/(a)(?(1)a|b|c)/
/(?(?=a)a|b|c)/
/(?(1a)/
/(?(1a))/
/(?(?i))/
/(?(abc))/
/(?(?<ab))/
/((?s)blah)\s+\1/I
/((?i)blah)\s+\1/I
/((?i)b)/IB
/(a*b|(?i:c*(?-i)d))/I
/a$/I
a
a\n
\= Expect no match
a\=noteol
a\n\=noteol
/a$/Im
a
a\n
a\n\=noteol
\= Expect no match
a\=noteol
/\Aabc/Im
/^abc/Im
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I
aaaaabbbbbcccccdef
/(?<=foo)[ab]/I
/(?<!foo)(alpha|omega)/I
/(?!alphabet)[ab]/I
/(?<=foo\n)^bar/Im
foo\nbarbar
\= Expect no match
rhubarb
barbell
abc\nbarton
/^(?<=foo\n)bar/Im
foo\nbarbar
\= Expect no match
rhubarb
barbell
abc\nbarton
/(?>^abc)/Im
abc
def\nabc
\= Expect no match
defabc
/(?<=ab(c+)d)ef/
/(?<=ab(?<=c+)d)ef/
/(?<=ab(c|de)f)g/
/The next three are in testinput2 because they have variable length branches/
/(?<=bullock|donkey)-cart/I
the bullock-cart
a donkey-cart race
\= Expect no match
cart
horse-and-cart
/(?<=ab(?i)x|y|z)/I
/(?>.*)(?<=(abcd)|(xyz))/I
alphabetabcd
endingxyz
/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I
abxyZZ
abXyZZ
ZZZ
zZZ
bZZ
BZZ
\= Expect no match
ZZ
abXYZZ
zzz
bzz
/(?<!(foo)a)bar/I
bar
foobbar
\= Expect no match
fooabar
# This one is here because Perl behaves differently; see also the following.
/^(a\1?){4}$/I
\= Expect no match
aaaa
aaaaaa
# 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
# a recursive reference to itself. PCRE has now made these into atomic patterns.
/^(xa|=?\1a){2}$/
xa=xaa
\= Expect no match
xa=xaaa
/^(xa|=?\1a)+$/
xa=xaa
\= Expect no match
xa=xaaa
# These are syntax tests from Perl 5.005
/a[b-a]/
/a[]b/
/a[/
/*a/
/(*)b/
/abc)/
/(abc/
/a**/
/)(/
/\1/
/\2/
/(a)|\2/
/a[b-a]/Ii
/a[]b/Ii
/a[/Ii
/*a/Ii
/(*)b/Ii
/abc)/Ii
/(abc/Ii
/a**/Ii
/)(/Ii
/:(?:/
/(?<%)b/
/a(?{)b/
/a(?{{})b/
/a(?{}})b/
/a(?{"{"})b/
/a(?{"{"}})b/
/(?(1?)a|b)/
/[a[:xyz:/
/(?<=x+)y/
/a{37,17}/
/abc/\
/abc/\i
/(a)bc(d)/I
abcd
abcd\=copy=2
abcd\=copy=5
/(.{20})/I
abcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyz\=copy=1
abcdefghijklmnopqrstuvwxyz\=get=1
/(.{15})/I
abcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyz\=copy=1,get=1
/(.{16})/I
abcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyz\=copy=1,get=1,getall
/^(a|(bc))de(f)/I
adef\=get=1,get=2,get=3,get=4,getall
bcdef\=get=1,get=2,get=3,get=4,getall
adefghijk\=copy=0
/^abc\00def/I
abc\00def\=copy=0,getall
/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
/.*X/IB
/.*X/IBs
/(.*X|^B)/IB
/(.*X|^B)/IBs
/(?s)(.*X|^B)/IB
/(?s:.*X|^B)/IB
/\Biss\B/I,aftertext
Mississippi
/iss/I,aftertext,altglobal
Mississippi
/\Biss\B/I,aftertext,altglobal
Mississippi
/\Biss\B/Ig,aftertext
Mississippi
\= Expect no match
Mississippi\=anchored
/(?<=[Ms])iss/Ig,aftertext
Mississippi
/(?<=[Ms])iss/I,aftertext,altglobal
Mississippi
/^iss/Ig,aftertext
ississippi
/.*iss/Ig,aftertext
abciss\nxyzisspqr
/.i./Ig,aftertext
Mississippi
Mississippi\=anchored
Missouri river
Missouri river\=anchored
/^.is/Ig,aftertext
Mississippi
/^ab\n/Ig,aftertext
ab\nab\ncd
/^ab\n/Igm,aftertext
ab\nab\ncd
/^/gm,newline=any
a\rb\nc\r\nxyz\=aftertext
/abc/I
/abc|bac/I
/(abc|bac)/I
/(abc|(c|dc))/I
/(abc|(d|de)c)/I
/a*/I
/a+/I
/(baa|a+)/I
/a{0,3}/I
/baa{3,}/I
/"([^\\"]+|\\.)*"/I
/(abc|ab[cd])/I
/(a|.)/I
/a|ba|\w/I
/abc(?=pqr)/I
/...(?<=abc)/I
/abc(?!pqr)/I
/ab./I
/ab[xyz]/I
/abc*/I
/ab.c*/I
/a.c*/I
/.c*/I
/ac*/I
/(a.c*|b.c*)/I
/a.c*|aba/I
/.+a/I
/(?=abcda)a.*/I
/(?=a)a.*/I
/a(b)*/I
/a\d*/I
/ab\d*/I
/a(\d)*/I
/abcde{0,0}/I
/ab\d+/I
/a(?(1)b)(.)/I
/a(?(1)bag|big)(.)/I
/a(?(1)bag|big)*(.)/I
/a(?(1)bag|big)+(.)/I
/a(?(1)b..|b..)(.)/I
/ab\d{0}e/I
/a?b?/I
a
b
ab
\
\= Expect no match
\=notempty
/|-/I
abcd
-abc
ab-c\=notempty
\= Expect no match
abc\=notempty
/^.?abcd/I
/\( # ( at start
(?: # Non-capturing bracket
(?>[^()]+) # Either a sequence of non-brackets (no backtracking)
| # Or
(?R) # Recurse - i.e. nested bracketed string
)* # Zero or more contents
\) # Closing )
/Ix
(abcd)
(abcd)xyz
xyz(abcd)
(ab(xy)cd)pqr
(ab(xycd)pqr
() abc ()
12(abcde(fsh)xyz(foo(bar))lmno)89
\= Expect no match
abcd
abcd)
(abcd
/\( ( (?>[^()]+) | (?R) )* \) /Igx
(ab(xy)cd)pqr
1(abcd)(x(y)z)pqr
/\( (?: (?>[^()]+) | (?R) ) \) /Ix
(abcd)
(ab(xy)cd)
(a(b(c)d)e)
((ab))
\= Expect no match
()
/\( (?: (?>[^()]+) | (?R) )? \) /Ix
()
12(abcde(fsh)xyz(foo(bar))lmno)89
/\( ( (?>[^()]+) | (?R) )* \) /Ix
(ab(xy)cd)
/\( ( ( (?>[^()]+) | (?R) )* ) \) /Ix
(ab(xy)cd)
/\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /Ix
(ab(xy)cd)
(123ab(xy)cd)
/\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /Ix
(ab(xy)cd)
(123ab(xy)cd)
/\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /Ix
(ab(xy)cd)
/\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /Ix
(abcd(xyz<p>qrs)123)
/\( ( ( (?>[^()]+) | ((?R)) )* ) \) /Ix
(ab(cd)ef)
(ab(cd(ef)gh)ij)
/^[[:alnum:]]/IB
/^[[:^alnum:]]/IB
/^[[:alpha:]]/IB
/^[[:^alpha:]]/IB
/[_[:alpha:]]/I
/^[[:ascii:]]/IB
/^[[:^ascii:]]/IB
/^[[:blank:]]/IB
/^[[:^blank:]]/IB
/[\n\x0b\x0c\x0d[:blank:]]/I
/^[[:cntrl:]]/IB
/^[[:digit:]]/IB
/^[[:graph:]]/IB
/^[[:lower:]]/IB
/^[[:print:]]/IB
/^[[:punct:]]/IB
/^[[:space:]]/IB
/^[[:upper:]]/IB
/^[[:xdigit:]]/IB
/^[[:word:]]/IB
/^[[:^cntrl:]]/IB
/^[12[:^digit:]]/IB
/^[[:^blank:]]/IB
/[01[:alpha:]%]/IB
/[[.ch.]]/I
/[[=ch=]]/I
/[[:rhubarb:]]/I
/[[:upper:]]/Ii
A
a
/[[:lower:]]/Ii
A
a
/((?-i)[[:lower:]])[[:lower:]]/Ii
ab
aB
\= Expect no match
Ab
AB
/[\200-\110]/I
/^(?(0)f|b)oo/I
# 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|$))(\w+)\s+(\270)/I
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC\=ovector=300
# This one's here because Perl does this differently and PCRE2 can't at present
/(main(O)?)+/I
mainmain
mainOmain
# These are all cases where Perl does it differently (nested captures)
/^(a(b)?)+$/I
aba
/^(aa(bb)?)+$/I
aabbaa
/^(aa|aa(bb))+$/I
aabbaa
/^(aa(bb)??)+$/I
aabbaa
/^(?:aa(bb)?)+$/I
aabbaa
/^(aa(b(b))?)+$/I
aabbaa
/^(?:aa(b(b))?)+$/I
aabbaa
/^(?:aa(b(?:b))?)+$/I
aabbaa
/^(?:aa(bb(?:b))?)+$/I
aabbbaa
/^(?:aa(b(?:bb))?)+$/I
aabbbaa
/^(?:aa(?:b(b))?)+$/I
aabbaa
/^(?:aa(?:b(bb))?)+$/I
aabbbaa
/^(aa(b(bb))?)+$/I
aabbbaa
/^(aa(bb(bb))?)+$/I
aabbbbaa
# ----------------
/#/IBx
/a#/IBx
/[\s]/IB
/[\S]/IB
/a(?i)b/IB
ab
aB
\= Expect no match
AB
/(a(?i)b)/IB
ab
aB
\= Expect no match
AB
/ (?i)abc/IBx
/#this is a comment
(?i)abc/IBx
/123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
/\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/IB
/\Q\E/IB
\
/\Q\Ex/IB
/ \Q\E/IB
/a\Q\E/IB
abc
bca
bac
/a\Q\Eb/IB
abc
/\Q\Eabc/IB
/x*+\w/IB
\= Expect no match
xxxxx
/x?+/IB
/x++/IB
/x{1,3}+/B,no_auto_possess
/x{1,3}+/Bi,no_auto_possess
/[^x]{1,3}+/B,no_auto_possess
/[^x]{1,3}+/Bi,no_auto_possess
/(x)*+/IB
/^(\w++|\s++)*$/I
now is the time for all good men to come to the aid of the party
\= Expect no match
this is not a line with only words and spaces!
/(\d++)(\w)/I
12345a
\= Expect no match
12345+
/a++b/I
aaab
/(a++b)/I
aaab
/(a++)b/I
aaab
/([^()]++|\([^()]*\))+/I
((abc(ade)ufh()()x
/\(([^()]++|\([^()]+\))+\)/I
(abc)
(abc(def)xyz)
\= Expect no match
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/(abc){1,3}+/IB
/a+?+/I
/a{2,3}?+b/I
/(?U)a+?+/I
/a{2,3}?+b/I,ungreedy
/x(?U)a++b/IB
xaaaab
/(?U)xa++b/IB
xaaaab
/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/IB
/^x(?U)a+b/IB
/^x(?U)(a+)b/IB
/[.x.]/I
/[=x=]/I
/[:x:]/I
/\l/I
/\L/I
/\N{name}/I
/\u/I
/\U/I
/a{1,3}b/ungreedy
ab
/[/I
/[a-/I
/[[:space:]/I
/[\s]/IB
/[[:space:]]/IB
/[[:space:]abcde]/IB
/< (?: (?(R) \d++ | [^<>]*+) | (?R)) * >/Ix
<>
<abcd>
<abc <123> hij>
<abc <def> hij>
<abc<>def>
<abc<>
\= Expect no match
<abc
/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
/\$\<\.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
/(.*)\d+\1/I
/(.*)\d+/I
/(.*)\d+\1/Is
/(.*)\d+/Is
/(.*(xyz))\d+\2/I
/((.*))\d+\1/I
abc123bc
/a[b]/I
/(?=a).*/I
/(?=abc).xyz/Ii
/(?=abc)(?i).xyz/I
/(?=a)(?=b)/I
/(?=.)a/I
/((?=abcda)a)/I
/((?=abcda)ab)/I
/()a/I
/(?:(?=.)|(?<!x))a/I
/(?(1)ab|ac)(.)/I
/(?(1)abz|acz)(.)/I
/(?(1)abz)(.)/I
/(?(1)abz)(1)23/I
/(a)+/I
/(a){2,3}/I
/(a)*/I
/[a]/I
/[ab]/I
/[ab]/I
/[^a]/I
/\d456/I
/\d456/I
/a^b/I
/^a/Im
abcde
xy\nabc
\= Expect no match
xyabc
/c|abc/I
/(?i)[ab]/I
/[ab](?i)cd/I
/abc(?C)def/I
abcdef
1234abcdef
\= Expect no match
abcxyz
abcxyzf
/abc(?C)de(?C1)f/I
123abcdef
/(?C1)\dabc(?C2)def/I
1234abcdef
\= Expect no match
abcdef
/(?C1)\dabc(?C2)def/I
1234abcdef
\= Expect no match
abcdef
/(?C255)ab/I
/(?C256)ab/I
/(?Cab)xx/I
/(?C12vr)x/I
/abc(?C)def/I
\x83\x0\x61bcdef
/(abc)(?C)de(?C1)f/I
123abcdef
123abcdef\=callout_capture
123abcdefC-\=callout_none
\= Expect no match
123abcdef\=callout_fail=1
/(?C0)(abc(?C1))*/I
abcabcabc
abcabc\=callout_fail=1:3
abcabcabc\=callout_fail=1:3
/(\d{3}(?C))*/I
123\=callout_capture
123456\=callout_capture
123456789\=callout_capture
/((xyz)(?C)p|(?C1)xyzabc)/I
xyzabc\=callout_capture
/(X)((xyz)(?C)p|(?C1)xyzabc)/I
Xxyzabc\=callout_capture
/(?=(abc))(?C)abcdef/I
abcdef\=callout_capture
/(?!(abc)(?C1)d)(?C2)abcxyz/I
abcxyz\=callout_capture
/(?<=(abc)(?C))xyz/I
abcxyz\=callout_capture
/a(b+)(c*)(?C1)/I
\= Expect no match
abbbbbccc\=callout_data=1
/a(b+?)(c*?)(?C1)/I
\= Expect no match
abbbbbccc\=callout_data=1
/(?C)abc/I
/(?C)^abc/I
/(?C)a|b/I
/x(ab|(bc|(de|(?R))))/I
xab
xbc
xde
xxab
xxxab
\= Expect no match
xyab
/^([^()]|\((?1)*\))*$/I
abc
a(b)c
a(b(c))d
\= Expect no match)
a(b(c)d
/^>abc>([^()]|\((?1)*\))*<xyz<$/I
>abc>123<xyz<
>abc>1(2)3<xyz<
>abc>(1(2)3)<xyz<
/(a(?1)b)/IB
/(a(?1)+b)/IB
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/I
12
(((2+2)*-3)-7)
-12
\= Expect no match
((2+2)*-3)-7)
/^(x(y|(?1){2})z)/I
xyz
xxyzxyzz
\= Expect no match
xxyzz
xxyzxyzxyzz
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/Ix
<>
<abcd>
<abc <123> hij>
<abc <def> hij>
<abc<>def>
<abc<>
\= Expect no match
<abc
/(?1)/I
/((?2)(abc)/I
/^(abc)def(?1)/I
abcdefabc
/^(a|b|c)=(?1)+/I
a=a
a=b
a=bc
/^(a|b|c)=((?1))+/I
a=a
a=b
a=bc
/a(?P<name1>b|c)d(?P<longername2>e)/IB
abde
acde
/(?:a(?P<c>c(?P<d>d)))(?P<a>a)/IB
/(?P<a>a)...(?P=a)bbb(?P>a)d/IB
/^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/Ii
1221
Satan, oscillate my metallic sonatas!
A man, a plan, a canal: Panama!
Able was I ere I saw Elba.
\= Expect no match
The quick brown fox
/((?(R)a|b))\1(?1)?/I
bb
bbaa
/(.*)a/Is
/(.*)a\1/Is
/(.*)a(b)\2/Is
/((.*)a|(.*)b)z/Is
/((.*)a|(.*)b)z\1/Is
/((.*)a|(.*)b)z\2/Is
/((.*)a|(.*)b)z\3/Is
/((.*)a|^(.*)b)z\3/Is
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/Is
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/Is
/(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/Is
/(a)(bc)/IB,no_auto_capture
abc
/(?P<one>a)(bc)/IB,no_auto_capture
abc
/(a)(?P<named>bc)/IB,no_auto_capture
/(aaa(?C1)bbb|ab)/I
aaabbb
aaabbb\=callout_data=0
aaabbb\=callout_data=1
\= Expect no match
aaabbb\=callout_data=-1
/ab(?P<one>cd)ef(?P<two>gh)/I
abcdefgh
abcdefgh\=copy=1,get=two
abcdefgh\=copy=one,copy=two
abcdefgh\=copy=three
/(?P<Tes>)(?P<Test>)/IB
/(?P<Test>)(?P<Tes>)/IB
/(?P<Z>zz)(?P<A>aa)/I
zzaa\=copy=Z
zzaa\=copy=A
/(?P<x>eks)(?P<x>eccs)/I
/(?P<abc>abc(?P<def>def)(?P<abc>xyz))/I
"\[((?P<elem>\d+)(,(?P>elem))*)\]"I
[10,20,30,5,5,4,4,2,43,23,4234]
\= Expect no match
[]
"\[((?P<elem>\d+)(,(?P>elem))*)?\]"I
[10,20,30,5,5,4,4,2,43,23,4234]
[]
/(a(b(?2)c))?/IB
/(a(b(?2)c))*/IB
/(a(b(?2)c)){0,2}/IB
/[ab]{1}+/B
/()(?1){1}/B
/()(?1)/B
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Baby Bjorn Active Carrier - With free SHIPPING!!
/((w\/|-|with)*(free|immediate)*.*?shipping\s*[!.-]*)/Ii
Baby Bjorn Active Carrier - With free SHIPPING!!
/a*.*b/IB
/(a|b)*.?c/IB
/abc(?C255)de(?C)f/IB
/abcde/IB,auto_callout
abcde
\= Expect no match
abcdfe
/a*b/IB,auto_callout
ab
aaaab
aaaacb
/a*b/IB,auto_callout
ab
aaaab
aaaacb
/a+b/IB,auto_callout
ab
aaaab
\= Expect no match
aaaacb
/(abc|def)x/IB,auto_callout
abcx
defx
\= Expect no match
abcdefzx
/(abc|def)x/IB,auto_callout
abcx
defx
\= Expect no match
abcdefzx
/(ab|cd){3,4}/I,auto_callout
ababab
abcdabcd
abcdcdcdcdcd
/([ab]{,4}c|xy)/IB,auto_callout
\= Expect no match
Note: that { does NOT introduce a quantifier
/([ab]{,4}c|xy)/IB,auto_callout
\= Expect no match
Note: that { does NOT introduce a quantifier
/([ab]{1,4}c|xy){4,5}?123/IB,auto_callout
aacaacaacaacaac123
/\b.*/I
ab cd\=offset=1
/\b.*/Is
ab cd\=startoffset=1
/(?!.bcd).*/I
Xbcd12345
/abcde/I
ab\=ps
abc\=ps
abcd\=ps
abcde\=ps
the quick brown abc\=ps
\= Expect no match\=ps
the quick brown abxyz fox\=ps
"^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/(20)?\d\d$"I
13/05/04\=ps
13/5/2004\=ps
02/05/09\=ps
1\=ps
1/2\=ps
1/2/0\=ps
1/2/04\=ps
0\=ps
02/\=ps
02/0\=ps
02/1\=ps
\= Expect no match\=ps
\=ps
123\=ps
33/4/04\=ps
3/13/04\=ps
0/1/2003\=ps
0/\=ps
02/0/\=ps
02/13\=ps
/0{0,2}ABC/I
/\d{3,}ABC/I
/\d*ABC/I
/[abc]+DE/I
/[abc]?123/I
123\=ps
a\=ps
b\=ps
c\=ps
c12\=ps
c123\=ps
/^(?:\d){3,5}X/I
1\=ps
123\=ps
123X
1234\=ps
1234X
12345\=ps
12345X
\= Expect no match
1X
123456\=ps
"<(\w+)/?>(.)*</(\1)>"Igms
<!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
/line\nbreak/I
this is a line\nbreak
line one\nthis is a line\nbreak in the second line
/line\nbreak/I,firstline
this is a line\nbreak
\= Expect no match
line one\nthis is a line\nbreak in the second line
/line\nbreak/Im,firstline
this is a line\nbreak
\= Expect no match
line one\nthis is a line\nbreak in the second line
/(?i)(?-i)AbCd/I
AbCd
\= Expect no match
abcd
/a{11111111111111111111}/I
/(){64294967295}/I
/(){2,4294967295}/I
"(?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
abcdefghijklAkB
"(?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
abcdefghijklAkB
"(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)A\11B"I
abcdefghijklAkB
"(?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
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
"(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
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/[^()]*(?:\((?R)\)[^()]*)*/I
(this(and)that
(this(and)that)
(this(and)that)stuff
/[^()]*(?:\((?>(?R))\)[^()]*)*/I
(this(and)that
(this(and)that)
/[^()]*(?:\((?R)\))*[^()]*/I
(this(and)that
(this(and)that)
/(?:\((?R)\))*[^()]*/I
(this(and)that
(this(and)that)
((this))
/(?:\((?R)\))|[^()]*/I
(this(and)that
(this(and)that)
(this)
((this))
/\x{0000ff}/I
/^((?P<A>a1)|(?P<A>a2)b)/I
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
a1b\=copy=A
a2b\=copy=A
a1b\=copy=Z,copy=A
/(?|(?<a>)(?<b>)(?<a>)|(?<a>)(?<b>)(?<a>))/I,dupnames
/^(?P<A>a)(?P<A>b)/I,dupnames
ab\=copy=A
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
ab\=copy=A
cd\=copy=A
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
cdefgh\=copy=A
/^((?P<A>a1)|(?P<A>a2)b)/I,dupnames
a1b\=get=A
a2b\=get=A
a1b\=get=Z,get=A
/^(?P<A>a)(?P<A>b)/I,dupnames
ab\=get=A
/^(?P<A>a)(?P<A>b)|cd/I,dupnames
ab\=get=A
cd\=get=A
/^(?P<A>a)(?P<A>b)|cd(?P<A>ef)(?P<A>gh)/I,dupnames
cdefgh\=get=A
/(?J)^((?P<A>a1)|(?P<A>a2)b)/I
a1b\=copy=A
a2b\=copy=A
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<A>d)/I
# In this next test, J is not set at the outer level; consequently it isn't set
# in the pattern's options; consequently pcre2_substring_get_byname() produces
# a random value.
/^(?P<A>a) (?J:(?P<B>b)(?P<B>c)) (?P<C>d)/I
a bc d\=copy=A,copy=B,copy=C
/^(?P<A>a)?(?(A)a|b)/I
aabc
bc
\= Expect no match
abc
/(?:(?(ZZ)a|b)(?P<ZZ>X))+/I
bXaX
/(?:(?(2y)a|b)(X))+/I
/(?:(?(ZA)a|b)(?P<ZZ>X))+/I
/(?:(?(ZZ)a|b)(?(ZZ)a|b)(?P<ZZ>X))+/I
bbXaaX
/(?:(?(ZZ)a|\(b\))\\(?P<ZZ>X))+/I
(b)\\Xa\\X
/(?P<ABC/I
/(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
bXXaYYaY
bXYaXXaX
/()()()()()()()()()(?:(?(A)(?P=A)a|b)(?P<A>X|Y))+/I
bXXaYYaY
/\s*,\s*/I
\x0b,\x0b
\x0c,\x0d
/^abc/Im,newline=lf
xyz\nabc
xyz\r\nabc
\= Expect no match
xyz\rabc
xyzabc\r
xyzabc\rpqr
xyzabc\r\n
xyzabc\r\npqr
/^abc/Im,newline=crlf
xyz\r\nabclf>
\= Expect no match
xyz\nabclf
xyz\rabclf
/^abc/Im,newline=cr
xyz\rabc
\= Expect no match
xyz\nabc
xyz\r\nabc
/^abc/Im,newline=bad
/.*/I,newline=lf
abc\ndef
abc\rdef
abc\r\ndef
/.*/I,newline=cr
abc\ndef
abc\rdef
abc\r\ndef
/.*/I,newline=crlf
abc\ndef
abc\rdef
abc\r\ndef
/\w+(.)(.)?def/Is
abc\ndef
abc\rdef
abc\r\ndef
/(?P<B>25[0-5]|2[0-4]\d|[01]?\d?\d)(?:\.(?P>B)){3}/I
/()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
()()()()()()()()()()()()()()()()()()()()
(.(.))/Ix
XY\=ovector=133
/(a*b|(?i:c*(?-i)d))/I
/()[ab]xyz/I
/(|)[ab]xyz/I
/(|c)[ab]xyz/I
/(|c?)[ab]xyz/I
/(d?|c?)[ab]xyz/I
/(d?|c)[ab]xyz/I
/^a*b\d/IB
/^a*+b\d/IB
/^a*?b\d/IB
/^a+A\d/IB
aaaA5
\= Expect no match
aaaa5
/^a*A\d/IBi
aaaA5
aaaa5
/(a*|b*)[cd]/I
/(a+|b*)[cd]/I
/(a*|b+)[cd]/I
/(a+|b+)[cd]/I
/((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((
(((
a
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
)))
/Ix
large nest
/a*\d/B
/a*\D/B
/0*\d/B
/0*\D/B
/a*\s/B
/a*\S/B
/ *\s/B
/ *\S/B
/a*\w/B
/a*\W/B
/=*\w/B
/=*\W/B
/\d*a/B
/\d*2/B
/\d*\d/B
/\d*\D/B
/\d*\s/B
/\d*\S/B
/\d*\w/B
/\d*\W/B
/\D*a/B
/\D*2/B
/\D*\d/B
/\D*\D/B
/\D*\s/B
/\D*\S/B
/\D*\w/B
/\D*\W/B
/\s*a/B
/\s*2/B
/\s*\d/B
/\s*\D/B
/\s*\s/B
/\s*\S/B
/\s*\w/B
/\s*\W/B
/\S*a/B
/\S*2/B
/\S*\d/B
/\S*\D/B
/\S*\s/B
/\S*\S/B
/\S*\w/B
/\S*\W/B
/\w*a/B
/\w*2/B
/\w*\d/B
/\w*\D/B
/\w*\s/B
/\w*\S/B
/\w*\w/B
/\w*\W/B
/\W*a/B
/\W*2/B
/\W*\d/B
/\W*\D/B
/\W*\s/B
/\W*\S/B
/\W*\w/B
/\W*\W/B
/[^a]+a/B
/[^a]+a/Bi
/[^a]+A/Bi
/[^a]+b/B
/[^a]+\d/B
/a*[^a]/B
/(?P<abc>x)(?P<xyz>y)/I
xy\=copy=abc,copy=xyz
/(?<abc>x)(?'xyz'y)/I
xy\=copy=abc,copy=xyz
/(?<abc'x)(?'xyz'y)/I
/(?<abc>x)(?'xyz>y)/I
/(?P'abc'x)(?P<xyz>y)/I
/^(?:(?(ZZ)a|b)(?<ZZ>X))+/
bXaX
bXbX
\= Expect no match
aXaX
aXbX
/^(?P>abc)(?<abcd>xxx)/
/^(?P>abc)(?<abc>x|y)/
xx
xy
yy
yx
/^(?P>abc)(?P<abc>x|y)/
xx
xy
yy
yx
/^((?(abc)a|b)(?<abc>x|y))+/
bxay
bxby
\= Expect no match
axby
/^(((?P=abc)|X)(?<abc>x|y))+/
XxXxxx
XxXyyx
XxXyxx
\= Expect no match
x
/^(?1)(abc)/
abcabc
/^(?:(?:\1|X)(a|b))+/
Xaaa
Xaba
/^[\E\Qa\E-\Qz\E]+/B
/^[a\Q]bc\E]/B
/^[a-\Q\E]/B
/^(?P>abc)[()](?<abc>)/B
/^((?(abc)y)[()](?P<abc>x))+/B
(xy)x
/^(?P>abc)\Q()\E(?<abc>)/B
/^(?P>abc)[a\Q(]\E(](?<abc>)/B
/^(?P>abc) # this is (a comment)
(?<abc>)/Bx
/^\W*(?:(?<one>(?<two>.)\W*(?&one)\W*\k<two>|)|(?<three>(?<four>.)\W*(?&three)\W*\k'four'|\W*.\W*))\W*$/Ii
1221
Satan, oscillate my metallic sonatas!
A man, a plan, a canal: Panama!
Able was I ere I saw Elba.
\= Expect no match
The quick brown fox
/(?=(\w+))\1:/I
abcd:
/(?=(?'abc'\w+))\k<abc>:/I
abcd:
/(?'abc'a|b)(?<abc>d|e)\k<abc>{2}/dupnames
adaa
\= Expect no match
addd
adbb
/(?'abc'a|b)(?<abc>d|e)(?&abc){2}/dupnames
bdaa
bdab
\= Expect no match
bddd
/(?(<bc))/
/(?(''))/
/(?('R')stuff)/
/((abc (?(R) (?(R1)1) (?(R2)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
/(?<A> (?'B' abc (?(R) (?(R&A)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
abcabc1Xabc2XabcXabcabc
/(?<A> (?'B' abc (?(R) (?(R&C)1) (?(R&B)2) X | (?1) (?2) (?R) ))) /x
/^(?(DEFINE) abc | xyz ) /x
/(?(DEFINE) abc) xyz/Ix
/(a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4\=ovector=0
\= Expect no match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=ovector=0
/^a.b/newline=lf
a\rb
\= Expect no match
a\nb
/^a.b/newline=cr
a\nb
\= Expect no match
a\rb
/^a.b/newline=anycrlf
a\x85b
\= Expect no match
a\rb
/^a.b/newline=any
\= Expect no match
a\nb
a\rb
a\x85b
/^abc./gmx,newline=any
abc1 \x0aabc2 \x0babc3xx \x0cabc4 \x0dabc5xx \x0d\x0aabc6 \x85abc7 JUNK
/abc.$/gmx,newline=any
abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc7 abc9
/^a\Rb/bsr=unicode
a\nb
a\rb
a\r\nb
a\x0bb
a\x0cb
a\x85b
\= Expect no match
a\n\rb
/^a\R*b/bsr=unicode
ab
a\nb
a\rb
a\r\nb
a\x0bb
a\x0cb
a\x85b
a\n\rb
a\n\r\x85\x0cb
/^a\R+b/bsr=unicode
a\nb
a\rb
a\r\nb
a\x0bb
a\x0cb
a\x85b
a\n\rb
a\n\r\x85\x0cb
\= Expect no match
ab
/^a\R{1,3}b/bsr=unicode
a\nb
a\n\rb
a\n\r\x85b
a\r\n\r\nb
a\r\n\r\n\r\nb
a\n\r\n\rb
a\n\n\r\nb
\= Expect no match
a\n\n\n\rb
a\r
/(?&abc)X(?<abc>P)/I
abcPXP123
/(?1)X(?<abc>P)/I
abcPXP123
/(?:a(?&abc)b)*(?<abc>x)/
123axbaxbaxbx456
123axbaxbaxb456
/(?:a(?&abc)b){1,5}(?<abc>x)/
123axbaxbaxbx456
/(?:a(?&abc)b){2,5}(?<abc>x)/
123axbaxbaxbx456
/(?:a(?&abc)b){2,}(?<abc>x)/
123axbaxbaxbx456
/(abc)(?i:(?1))/
defabcabcxyz
\= Expect no match
DEFabcABCXYZ
/(abc)(?:(?i)(?1))/
defabcabcxyz
\= Expect no match
DEFabcABCXYZ
/^(a)\g-2/
/^(a)\g/
/^(a)\g{0}/
/^(a)\g{3/
/^(a)\g{aa}/
/^a.b/newline=lf
a\rb
\= Expect no match
a\nb
/.+foo/
afoo
\= Expect no match
\r\nfoo
\nfoo
/.+foo/newline=crlf
afoo
\nfoo
\= Expect no match
\r\nfoo
/.+foo/newline=any
afoo
\= Expect no match
\nfoo
\r\nfoo
/.+foo/s
afoo
\r\nfoo
\nfoo
/^$/gm,newline=any
abc\r\rxyz
abc\n\rxyz
\= Expect no match
abc\r\nxyz
/(?m)^$/g,newline=any,aftertext
abc\r\n\r\n
/(?m)^$|^\r\n/g,newline=any,aftertext
abc\r\n\r\n
/(?m)$/g,newline=any,aftertext
abc\r\n\r\n
/abc.$/gmx,newline=anycrlf
abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc9
/^X/m
XABC
\= Expect no match
XABC\=notbol
/(ab|c)(?-1)/B
abc
/xy(?+1)(abc)/B
xyabcabc
\= Expect no match
xyabc
/x(?-0)y/
/x(?-1)y/
/x(?+0)y/
/x(?+1)y/
/^(abc)?(?(-1)X|Y)/B
abcX
Y
\= Expect no match
abcY
/^((?(+1)X|Y)(abc))+/B
YabcXabc
YabcXabcXabc
\= Expect no match
XabcXabc
/(?(-1)a)/B
/((?(-1)a))/B
/((?(-2)a))/B
/^(?(+1)X|Y)(.)/B
Y!
/(?<A>tom|bon)-\k{A}/
tom-tom
bon-bon
\= Expect no match
tom-bon
/\g{A/
/(?|(abc)|(xyz))/B
>abc<
>xyz<
/(x)(?|(abc)|(xyz))(x)/B
xabcx
xxyzx
/(x)(?|(abc)(pqr)|(xyz))(x)/B
xabcpqrx
xxyzx
/\H++X/B
\= Expect no match
XXXX
/\H+\hY/B
XXXX Y
/\H+ Y/B
/\h+A/B
/\v*B/B
/\V+\x0a/B
/A+\h/B
/ *\H/B
/A*\v/B
/\x0b*\V/B
/\d+\h/B
/\d*\v/B
/S+\h\S+\v/B
/\w{3,}\h\w+\v/B
/\h+\d\h+\w\h+\S\h+\H/B
/\v+\d\v+\w\v+\S\v+\V/B
/\H+\h\H+\d/B
/\V+\v\V+\w/B
/\( (?: [^()]* | (?R) )* \)/x
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/[\E]AAA/
/[\Q\E]AAA/
/[^\E]AAA/
/[^\Q\E]AAA/
/[\E^]AAA/
/[\Q\E^]AAA/
/A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
/^a+(*FAIL)/auto_callout
\= Expect no match
aaaaaa
/a+b?c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
/a+b?(*PRUNE)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
/a+b?(*COMMIT)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
/a+b?(*SKIP)c+(*FAIL)/auto_callout
\= Expect no match
aaabcccaaabccc
/a+b?(*THEN)c+(*FAIL)/auto_callout
\= Expect no match
aaabccc
/a(*MARK)b/
/(?i:A{1,}\6666666666)/
/\g6666666666/
/[\g6666666666]/B
/(?1)\c[/
/.+A/newline=crlf
\= Expect no match
\r\nA
/\nA/newline=crlf
\r\nA
/[\r\n]A/newline=crlf
\r\nA
/(\r|\n)A/newline=crlf
\r\nA
/a(*CR)b/
/(*CR)a.b/
a\nb
\= Expect no match
a\rb
/(*CR)a.b/newline=lf
a\nb
\= Expect no match
a\rb
/(*LF)a.b/newline=CRLF
a\rb
\= Expect no match
a\nb
/(*CRLF)a.b/
a\rb
a\nb
\= Expect no match
a\r\nb
/(*ANYCRLF)a.b/newline=CR
\= Expect no match
a\rb
a\nb
a\r\nb
/(*ANY)a.b/newline=cr
\= Expect no match
a\rb
a\nb
a\r\nb
a\x85b
/(*ANY).*/g
abc\r\ndef
/(*ANYCRLF).*/g
abc\r\ndef
/(*CRLF).*/g
abc\r\ndef
/a\Rb/I,bsr=anycrlf
a\rb
a\nb
a\r\nb
\= Expect no match
a\x85b
a\x0bb
/a\Rb/I,bsr=unicode
a\rb
a\nb
a\r\nb
a\x85b
a\x0bb
/a\R?b/I,bsr=anycrlf
a\rb
a\nb
a\r\nb
\= Expect no match
a\x85b
a\x0bb
/a\R?b/I,bsr=unicode
a\rb
a\nb
a\r\nb
a\x85b
a\x0bb
/a\R{2,4}b/I,bsr=anycrlf
a\r\n\nb
a\n\r\rb
a\r\n\r\n\r\n\r\nb
\= Expect no match
a\x85\x85b
a\x0b\x0bb
/a\R{2,4}b/I,bsr=unicode
a\r\rb
a\n\n\nb
a\r\n\n\r\rb
a\x85\x85b
a\x0b\x0bb
\= Expect no match
a\r\r\r\r\rb
/(*BSR_ANYCRLF)a\Rb/I
a\nb
a\rb
/(*BSR_UNICODE)a\Rb/I
a\x85b
/(*BSR_ANYCRLF)(*CRLF)a\Rb/I
a\nb
a\rb
/(*CRLF)(*BSR_UNICODE)a\Rb/I
a\x85b
/(*CRLF)(*BSR_ANYCRLF)(*CR)ab/I
/(?<a>)(?&)/
/(?<abc>)(?&a)/
/(?<a>)(?&aaaaaaaaaaaaaaaaaaaaaaa)/
/(?+-a)/
/(?-+a)/
/(?(-1))/
/(?(+10))/
/(?(10))/
/(?(+2))()()/
/(?(2))()()/
/\k''/
/\k<>/
/\k{}/
/\k/
/\kabc/
/(?P=)/
/(?P>)/
/[[:foo:]]/
/[[:1234:]]/
/[[:f\oo:]]/
/[[: :]]/
/[[:...:]]/
/[[:l\ower:]]/
/[[:abc\:]]/
/[abc[:x\]pqr:]]/
/[[:a\dz:]]/
/(^(a|b\g<-1'c))/
/^(?+1)(?<a>x|y){0}z/
xzxx
yzyy
\= Expect no match
xxz
/(\3)(\1)(a)/
\= Expect no match
cat
/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
cat
/TA]/
The ACTA] comes
/TA]/alt_bsux,allow_empty_class,match_unset_backref,dupnames
The ACTA] comes
/(?2)[]a()b](abc)/
abcbabc
/(?2)[^]a()b](abc)/
abcbabc
/(?1)[]a()b](abc)/
abcbabc
\= Expect no match
abcXabc
/(?1)[^]a()b](abc)/
abcXabc
\= Expect no match
abcbabc
/(?2)[]a()b](abc)(xyz)/
xyzbabcxyz
/(?&N)[]a(?<N>)](?<M>abc)/
abc<abc
/(?&N)[]a(?<N>)](abc)/
abc<abc
/a[]b/
/a[^]b/
/a[]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
/a[]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
/a[]*+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
ab
/a[^]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aXb
a\nb
\= Expect no match
ab
/a[^]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aXb
a\nX\nXb
\= Expect no match
ab
/a(?!)b/B
/(?!)?a/B
ab
/a(*FAIL)+b/
/(abc|pqr|123){0}[xyz]/I
/(?(?=.*b)b|^)/I,auto_callout
adc
abc
/(?(?=b).*b|^d)/I
/(?(?=.*b).*b|^d)/I
/xyz/auto_callout
xyz
abcxyz
\= Expect no match
abc
abcxypqr
/xyz/auto_callout,no_start_optimize
abcxyz
\= Expect no match
abc
abcxypqr
/(*NO_START_OPT)xyz/auto_callout
abcxyz
/(*NO_AUTO_POSSESS)a+b/B
/xyz/auto_callout,no_start_optimize
abcxyz
/^"((?(?=[a])[^"])|b)*"$/auto_callout
"ab"
/^"((?(?=[a])[^"])|b)*"$/
"ab"
/^X(?5)(a)(?|(b)|(q))(c)(d)Y/
XYabcdY
/^X(?&N)(a)(?|(b)|(q))(c)(d)(?<N>Y)/
XYabcdY
/Xa{2,4}b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/Xa{2,4}?b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/Xa{2,4}+b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X\d{2,4}b/
X\=ps
X3\=ps
X33\=ps
X333\=ps
X3333\=ps
/X\d{2,4}?b/
X\=ps
X3\=ps
X33\=ps
X333\=ps
X3333\=ps
/X\d{2,4}+b/
X\=ps
X3\=ps
X33\=ps
X333\=ps
X3333\=ps
/X\D{2,4}b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X\D{2,4}?b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X\D{2,4}+b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X[abc]{2,4}b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X[abc]{2,4}?b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X[abc]{2,4}+b/
X\=ps
Xa\=ps
Xaa\=ps
Xaaa\=ps
Xaaaa\=ps
/X[^a]{2,4}b/
X\=ps
Xz\=ps
Xzz\=ps
Xzzz\=ps
Xzzzz\=ps
/X[^a]{2,4}?b/
X\=ps
Xz\=ps
Xzz\=ps
Xzzz\=ps
Xzzzz\=ps
/X[^a]{2,4}+b/
X\=ps
Xz\=ps
Xzz\=ps
Xzzz\=ps
Xzzzz\=ps
/(Y)X\1{2,4}b/
YX\=ps
YXY\=ps
YXYY\=ps
YXYYY\=ps
YXYYYY\=ps
/(Y)X\1{2,4}?b/
YX\=ps
YXY\=ps
YXYY\=ps
YXYYY\=ps
YXYYYY\=ps
/(Y)X\1{2,4}+b/
YX\=ps
YXY\=ps
YXYY\=ps
YXYYY\=ps
YXYYYY\=ps
/\++\KZ|\d+X|9+Y/startchar
++++123999\=ps
++++123999Y\=ps
++++Z1234\=ps
/Z(*F)/
\= Expect no match
Z\=ps
ZA\=ps
/Z(?!)/
\= Expect no match
Z\=ps
ZA\=ps
/dog(sbody)?/
dogs\=ps
dogs\=ph
/dog(sbody)??/
dogs\=ps
dogs\=ph
/dog|dogsbody/
dogs\=ps
dogs\=ph
/dogsbody|dog/
dogs\=ps
dogs\=ph
/\bthe cat\b/
the cat\=ps
the cat\=ph
/abc/
abc\=ps
abc\=ph
/abc\K123/startchar
xyzabc123pqr
xyzabc12\=ps
xyzabc12\=ph
/(?<=abc)123/
xyzabc123pqr
xyzabc12\=ps
xyzabc12\=ph
/\babc\b/
+++abc+++
+++ab\=ps
+++ab\=ph
/(?&word)(?&element)(?(DEFINE)(?<element><[^m][^>]>[^<])(?<word>\w*+))/B
/(?&word)(?&element)(?(DEFINE)(?<element><[^\d][^>]>[^<])(?<word>\w*+))/B
/(ab)(x(y)z(cd(*ACCEPT)))pq/B
/abc\K/aftertext,startchar
abcdef
abcdef\=notempty_atstart
xyzabcdef\=notempty_atstart
\= Expect no match
abcdef\=notempty
xyzabcdef\=notempty
/^(?:(?=abc)|abc\K)/aftertext,startchar
abcdef
abcdef\=notempty_atstart
\= Expect no match
abcdef\=notempty
/a?b?/aftertext
xyz
xyzabc
xyzabc\=notempty
xyzabc\=notempty_atstart
xyz\=notempty_atstart
\= Expect no match
xyz\=notempty
/^a?b?/aftertext
xyz
xyzabc
\= Expect no match
xyzabc\=notempty
xyzabc\=notempty_atstart
xyz\=notempty_atstart
xyz\=notempty
/^(?<name>a|b\g<name>c)/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/^(?<name>a|b\g'name'c)/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/^(a|b\g<1>c)/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/^(a|b\g'1'c)/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/^(a|b\g'-1'c)/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/(^(a|b\g<-1>c))/
aaaa
bacxxx
bbaccxxx
bbbacccxx
/(?-i:\g<name>)(?i:(?<name>a))/
XaaX
XAAX
/(?i:\g<name>)(?-i:(?<name>a))/
XaaX
\= Expect no match
XAAX
/(?-i:\g<+1>)(?i:(a))/
XaaX
XAAX
/(?=(?<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
accccbbb
/^X(?7)(a)(?|(b)|(q)(r)(s))(c)(d)(Y)/
XYabcdY
/(?<=b(?1)|zzz)(a)/
xbaax
xzzzax
/(a)(?<=b\1)/
/(a)(?<=b+(?1))/
/(a+)(?<=b(?1))/
/(a(?<=b(?1)))/
/(?<=b(?1))xyz/
/(?<=b(?1))xyz(b+)pqrstuvew/
/(a|bc)\1/I
/(a|bc)\1{2,3}/I
/(a|bc)(?1)/I
/(a|b\1)(a|b\1)/I
/(a|b\1){2}/I
/(a|bbbb\1)(a|bbbb\1)/I
/(a|bbbb\1){2}/I
/^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
/<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
"(?>.*/)foo"I
/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /Ix
/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/Ii
/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/I
/<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
/^(?!:) # 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
/(?|(?<a>A)|(?<a>B))/I
AB\=copy=a
BA\=copy=a
/(?|(?<a>A)|(?<b>B))/
/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |
b(?<quote> (?<apostrophe>')|(?<realquote>")) )
(?('quote')[a-z]+|[0-9]+)/Ix,dupnames
a"aaaaa
b"aaaaa
\= Expect no match
b"11111
a"11111
/^(?|(a)(b)(c)(?<D>d)|(?<D>e)) (?('D')X|Y)/IBx,dupnames
abcdX
eX
\= Expect no match
abcdY
ey
/(?<A>a) (b)(c) (?<A>d (?(R&A)$ | (?4)) )/IBx,dupnames
abcdd
\= Expect no match
abcdde
/abcd*/
xxxxabcd\=ps
xxxxabcd\=ph
/abcd*/i
xxxxabcd\=ps
xxxxabcd\=ph
XXXXABCD\=ps
XXXXABCD\=ph
/abc\d*/
xxxxabc1\=ps
xxxxabc1\=ph
/(a)bc\1*/
xxxxabca\=ps
xxxxabca\=ph
/abc[de]*/
xxxxabcde\=ps
xxxxabcde\=ph
# 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
XABD
BAD
ABXABD
\= Expect no match
ABX
BAXBAD
/(\3)(\1)(a)/alt_bsux,allow_empty_class,match_unset_backref,dupnames
cat
/(\3)(\1)(a)/I,alt_bsux,allow_empty_class,match_unset_backref,dupnames
cat
/(\3)(\1)(a)/I
\= Expect no match
cat
/i(?(DEFINE)(?<s>a))/I
i
/()i(?(1)a)/I
ia
/(?i)a(?-i)b|c/B
XabX
XAbX
CcC
\= Expect no match
XABX
/(?i)a(?s)b|c/B
/(?i)a(?s-i)b|c/B
/^(ab(c\1)d|x){2}$/B
xabcxd
/^(?&t)*+(?(DEFINE)(?<t>.))$/B
/^(?&t)*(?(DEFINE)(?<t>.))$/B
# This one is here because Perl gives the match as "b" rather than "ab". I
# believe this to be a Perl bug.
/(?>a\Kb)z|(ab)/
ab\=startchar
/(?P<L1>(?P<L2>0|)|(?P>L2)(?P>L1))/
abcd
0abc
/abc(*MARK:)pqr/
/abc(*:)pqr/
/abc(*FAIL:123)xyz/
# This should, and does, fail. In Perl, it does not, which I think is a
# bug because replacing the B in the pattern by (B|D) does make it fail.
/A(*COMMIT)B/aftertext,mark
\= Expect no match
ACABX
# These should be different, but in Perl they are not, which I think
# is a bug in Perl.
/A(*THEN)B|A(*THEN)C/mark
AC
/A(*PRUNE)B|A(*PRUNE)C/mark
\= Expect no match
AC
# Mark names can be duplicated. Perl doesn't give a mark for this one,
# though PCRE2 does.
/^A(*:A)B|^X(*:A)Y/mark
\= Expect no match
XAQQ
# COMMIT at the start of a pattern should be the same as an anchor. Perl
# optimizations defeat this. So does the PCRE2 optimization unless we disable
# it.
/(*COMMIT)ABC/
ABCDEFG
/(*COMMIT)ABC/no_start_optimize
\= Expect no match
DEFGABC
/^(ab (c+(*THEN)cd) | xyz)/x
\= Expect no match
abcccd
/^(ab (c+(*PRUNE)cd) | xyz)/x
\= Expect no match
abcccd
/^(ab (c+(*FAIL)cd) | xyz)/x
\= Expect no match
abcccd
# Perl gets some of these wrong
/(?>.(*ACCEPT))*?5/
abcde
/(.(*ACCEPT))*?5/
abcde
/(.(*ACCEPT))5/
abcde
/(.(*ACCEPT))*5/
abcde
/A\NB./B
ACBD
\= Expect no match
A\nB
ACB\n
/A\NB./Bs
ACBD
ACB\n
\= Expect no match
A\nB
/A\NB/newline=crlf
A\nB
A\rB
\= Expect no match
A\r\nB
/\R+b/B
/\R+\n/B
/\R+\d/B
/\d*\R/B
/\s*\R/B
\x20\x0a
\x20\x0d
\x20\x0d\x0a
/\S*\R/B
a\x0a
/X\h*\R/B
X\x20\x0a
/X\H*\R/B
X\x0d\x0a
/X\H+\R/B
X\x0d\x0a
/X\H++\R/B
\= Expect no match
X\x0d\x0a
/(?<=abc)def/
abc\=ph
/abc$/
abc
abc\=ps
abc\=ph
/abc$/m
abc
abc\n
abc\=ph
abc\n\=ph
abc\=ps
abc\n\=ps
/abc\z/
abc
abc\=ps
abc\=ph
/abc\Z/
abc
abc\=ps
abc\=ph
/abc\b/
abc
abc\=ps
abc\=ph
/abc\B/
abc\=ps
abc\=ph
\= Expect no match
abc
/.+/
\= Bad offsets
abc\=offset=4
abc\=offset=-4
\= Valid data
abc\=offset=0
abc\=offset=1
abc\=offset=2
\= Expect no match
abc\=offset=3
/^\cģ/
/(?P<abn>(?P=abn)xxx)/B
/(a\1z)/B
/(?P<abn>(?P=abn)(?<badstufxxx)/B
/(?P<abn>(?P=axn)xxx)/B
/(?P<abn>(?P=axn)xxx)(?<axn>yy)/B
# These tests are here because Perl gets the first one wrong.
/(\R*)(.)/s
\r\n
\r\r\n\n\r
\r\r\n\n\r\n
/(\R)*(.)/s
\r\n
\r\r\n\n\r
\r\r\n\n\r\n
/((?>\r\n|\n|\x0b|\f|\r|\x85)*)(.)/s
\r\n
\r\r\n\n\r
\r\r\n\n\r\n
# -------------
/^abc$/B
/^abc$/Bm
/^(a)*+(\w)/
aaaaX
\= Expect no match
aaaa
/^(?:a)*+(\w)/
aaaaX
\= Expect no match
aaaa
/(a)++1234/IB
/([abc])++1234/I
/(?<=(abc)+)X/
/(^ab)/I
/(^ab)++/I
/(^ab|^)+/I
/(^ab|^)++/I
/(?:^ab)/I
/(?:^ab)++/I
/(?:^ab|^)+/I
/(?:^ab|^)++/I
/(.*ab)/I
/(.*ab)++/I
/(.*ab|.*)+/I
/(.*ab|.*)++/I
/(?:.*ab)/I
/(?:.*ab)++/I
/(?:.*ab|.*)+/I
/(?:.*ab|.*)++/I
/(?=a)[bcd]/I
/((?=a))[bcd]/I
/((?=a))+[bcd]/I
/((?=a))++[bcd]/I
/(?=a+)[bcd]/Ii
/(?=a+?)[bcd]/Ii
/(?=a++)[bcd]/Ii
/(?=a{3})[bcd]/Ii
/(abc)\1+/
# Perl doesn't get these right IMO (the 3rd is PCRE2-specific)
/(?1)(?:(b(*ACCEPT))){0}/
b
/(?1)(?:(b(*ACCEPT))){0}c/
bc
\= Expect no match
b
/(?1)(?:((*ACCEPT))){0}c/
c
c\=notempty
/^.*?(?(?=a)a|b(*THEN)c)/
\= Expect no match
ba
/^.*?(?(?=a)a|bc)/
ba
/^.*?(?(?=a)a(*THEN)b|c)/
\= Expect no match
ac
/^.*?(?(?=a)a(*THEN)b)c/
\= Expect no match
ac
/^.*?(a(*THEN)b)c/
\= Expect no match
aabc
/^.*? (?1) c (?(DEFINE)(a(*THEN)b))/x
aabc
/^.*?(a(*THEN)b|z)c/
aabc
/^.*?(z|a(*THEN)b)c/
aabc
# 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
\= Expect no match
D
/(*:A)A+(*SKIP:A)(B|Z)/mark
\= Expect no match
AAAC
# ----------------------------
"(?=a*(*ACCEPT)b)c"
c
c\=notempty
/(?1)c(?(DEFINE)((*ACCEPT)b))/
c
c\=notempty
/(?>(*ACCEPT)b)c/
c
\= Expect no match
c\=notempty
/(?:(?>(a)))+a%/allaftertext
%aa%
/(a)b|ac/allaftertext
ac\=ovector=1
/(a)(b)x|abc/allaftertext
abc\=ovector=2
/(a)bc|(a)(b)\2/
abc\=ovector=1
abc\=ovector=2
aba\=ovector=1
aba\=ovector=2
aba\=ovector=3
aba\=ovector=4
/(?(DEFINE)(a(?2)|b)(b(?1)|a))(?:(?1)|(?2))/I
/(a(?2)|b)(b(?1)|a)(?:(?1)|(?2))/I
/(a(?2)|b)(b(?1)|a)(?1)(?2)/I
/(abc)(?1)/I
/(?:(foo)|(bar)|(baz))X/allcaptures
bazfooX
foobazbarX
barfooX
bazX
foobarbazX
bazfooX\=ovector=0
bazfooX\=ovector=1
bazfooX\=ovector=2
bazfooX\=ovector=3
/(?=abc){3}abc/B
/(?=abc)+abc/B
/(?=abc)++abc/B
/(?=abc){0}xyz/B
/(?=(a))?./B
/(?=(a))??./B
/^(?=(a)){0}b(?1)/B
/(?(DEFINE)(a))?b(?1)/B
/^(?=(?1))?[az]([abc])d/B
/^(?!a){0}\w+/B
/(?<=(abc))?xyz/B
/[:a[:abc]b:]/B
/^(a(*:A)(d|e(*:B))z|aeq)/auto_callout
adz
aez
aeqwerty
/.(*F)/
\= Expect no match
abc\=ph
/\btype\b\W*?\btext\b\W*?\bjavascript\b/I
/\btype\b\W*?\btext\b\W*?\bjavascript\b|\burl\b\W*?\bshell:|<input\b.*?\btype\b\W*?\bimage\b|\bonkeyup\b\W*?\=/I
/a(*SKIP)c|b(*ACCEPT)|/I,aftertext
a
/a(*SKIP)c|b(*ACCEPT)cd(*ACCEPT)|x/I
ax
'a*(*ACCEPT)b'aftertext
abc\=notempty_atstart
bbb\=notempty_atstart
\= Expect no match
\=notempty_atstart
/(*ACCEPT)a/I,aftertext
bax
/z(*ACCEPT)a/I,aftertext
baxzbx
/^(?>a+)(?>(z+))\w/B
aaaazzzzb
\= Expect no match
aazz
/(.)(\1|a(?2))/
bab
/\1|(.)(?R)\1/
cbbbc
/(.)((?(1)c|a)|a(?2))/
\= Expect no match
baa
/(?P<abn>(?P=abn)xxx)/B
/(a\1z)/B
/^a\x41z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
\= Expect no match
ax41z
/^a[m\x41]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
/^a\x1z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
ax1z
/^a\u0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
\= Expect no match
au0041z
/^a[m\u0041]z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aAz
/^a\u041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
au041z
\= Expect no match
aAz
/^a\U0041z/alt_bsux,allow_empty_class,match_unset_backref,dupnames
aU0041z
\= Expect no match
aAz
/(?(?=c)c|d)++Y/B
/(?(?=c)c|d)*+Y/B
/a[\NB]c/
aNc
/a[B-\Nc]/
/a[B\Nc]/
/(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
XXYZ
\= Expect no match
XAQQ
XAQQXZZ
AXQQQ
AXXQQQ
# 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
\= Expect no match
abc
/(q|b)(*:m)f|a(*:n)w/mark
aw
\= Expect no match
abc
# After a partial match, the behaviour is as for a failure.
/^a(*:X)bcde/mark
abc\=ps
# These are here because Perl doesn't return a mark, except for the first.
/(?=(*:x))(q|)/aftertext,mark
abc
/(?=(*:x))((*:y)q|)/aftertext,mark
abc
/(?=(*:x))(?:(*:y)q|)/aftertext,mark
abc
/(?=(*:x))(?>(*:y)q|)/aftertext,mark
abc
/(?=a(*:x))(?!a(*:y)c)/aftertext,mark
ab
/(?=a(*:x))(?=a(*:y)c|)/aftertext,mark
ab
/(..)\1/
ab\=ps
aba\=ps
abab\=ps
/(..)\1/i
ab\=ps
abA\=ps
aBAb\=ps
/(..)\1{2,}/
ab\=ps
aba\=ps
abab\=ps
ababa\=ps
ababab\=ps
ababab\=ph
abababa\=ps
abababa\=ph
/(..)\1{2,}/i
ab\=ps
aBa\=ps
aBAb\=ps
AbaBA\=ps
abABAb\=ps
aBAbaB\=ph
abABabA\=ps
abaBABa\=ph
/(..)\1{2,}?x/i
ab\=ps
abA\=ps
aBAb\=ps
abaBA\=ps
abAbaB\=ps
abaBabA\=ps
abAbABaBx\=ps
/^(..)\1/
aba\=ps
/^(..)\1{2,3}x/
aba\=ps
ababa\=ps
ababa\=ph
abababx
ababababx
/^(..)\1{2,3}?x/
aba\=ps
ababa\=ps
ababa\=ph
abababx
ababababx
/^(..)(\1{2,3})ab/
abababab
/^\R/
\r\=ps
\r\=ph
/^\R{2,3}x/
\r\=ps
\r\=ph
\r\r\=ps
\r\r\=ph
\r\r\r\=ps
\r\r\r\=ph
\r\rx
\r\r\rx
/^\R{2,3}?x/
\r\=ps
\r\=ph
\r\r\=ps
\r\r\=ph
\r\r\r\=ps
\r\r\r\=ph
\r\rx
\r\r\rx
/^\R?x/
\r\=ps
\r\=ph
x
\rx
/^\R+x/
\r\=ps
\r\=ph
\r\n\=ps
\r\n\=ph
\rx
/^a$/newline=crlf
a\r\=ps
a\r\=ph
/^a$/m,newline=crlf
a\r\=ps
a\r\=ph
/^(a$|a\r)/newline=crlf
a\r\=ps
a\r\=ph
/^(a$|a\r)/m,newline=crlf
a\r\=ps
a\r\=ph
/./newline=crlf
\r\=ps
\r\=ph
/.{2,3}/newline=crlf
\r\=ps
\r\=ph
\r\r\=ps
\r\r\=ph
\r\r\r\=ps
\r\r\r\=ph
/.{2,3}?/newline=crlf
\r\=ps
\r\=ph
\r\r\=ps
\r\r\=ph
\r\r\r\=ps
\r\r\r\=ph
"AB(C(D))(E(F))?(?(?=\2)(?=\4))"
ABCDGHI\=ovector=01
# 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
/(?:.*?a)(?<=ba)/I
/.*?a(*PRUNE)b/I
/.*?a(*PRUNE)b/Is
/^a(*PRUNE)b/Is
/.*?a(*SKIP)b/I
/(?>.*?a)b/Is
/(?>.*?a)b/I
/(?>^a)b/Is
/(?>.*?)(?<=(abcd)|(wxyz))/I
/(?>.*)(?<=(abcd)|(wxyz))/I
"(?>.*)foo"I
"(?>.*?)foo"I
/(?>^abc)/Im
/(?>.*abc)/Im
/(?:.*abc)/Im
/(?:(a)+(?C1)bb|aa(?C2)b)/
aab\=callout_capture
/(?:(a)++(?C1)bb|aa(?C2)b)/
aab\=callout_capture
/(?:(?>(a))(?C1)bb|aa(?C2)b)/
aab\=callout_capture
/(?:(?1)(?C1)x|ab(?C2))((a)){0}/
aab\=callout_capture
/(?1)(?C1)((a)(?C2)){0}/
aab\=callout_capture
/(?:(a)+(?C1)bb|aa(?C2)b)++/
aab\=callout_capture
aab\=callout_capture,ovector=1
/(ab)x|ab/
ab\=ovector=0
ab\=ovector=1
/(?<=123)(*MARK:xx)abc/mark
xxxx123a\=ph
xxxx123a\=ps
/123\Kabc/startchar
xxxx123a\=ph
xxxx123a\=ps
/^(?(?=a)aa|bb)/auto_callout
bb
/(?C1)^(?C2)(?(?C99)(?=(?C3)a(?C4))(?C5)a(?C6)a(?C7)|(?C8)b(?C9)b(?C10))(?C11)/
bb
# Perl seems to have a bug with this one.
/aaaaa(*COMMIT)(*PRUNE)b|a+c/
aaaaaac
# Here are some that Perl treats differently because of the way it handles
# backtracking verbs.
/(?!a(*COMMIT)b)ac|ad/
ac
ad
/^(?!a(*THEN)b|ac)../
ad
\= Expect no match
ac
/^(?=a(*THEN)b|ac)/
ac
/\A.*?(?:a|b(*THEN)c)/
ba
/\A.*?(?:a|b(*THEN)c)++/
ba
/\A.*?(?:a|b(*THEN)c|d)/
ba
/(?:(a(*MARK:X)a+(*SKIP:X)b)){0}(?:(?1)|aac)/
aac
/\A.*?(a|b(*THEN)c)/
ba
/^(A(*THEN)B|A(*THEN)D)/
AD
/(?!b(*THEN)a)bn|bnn/
bnn
/(?(?=b(*SKIP)a)bn|bnn)/
\= Expect no match
bnn
/(?=b(*THEN)a|)bn|bnn/
bnn
# This test causes a segfault with Perl 5.18.0
/^(?=(a)){0}b(?1)/
backgammon
/(?|(?<n>f)|(?<n>b))/I,dupnames
/(?<a>abc)(?<a>z)\k<a>()/IB,dupnames
/a*[bcd]/B
/[bcd]*a/B
# A complete set of tests for auto-possessification of character types, but
# omitting \C because it might be disabled (it has its own tests).
/\D+\D \D+\d \D+\S \D+\s \D+\W \D+\w \D+. \D+\R \D+\H \D+\h \D+\V \D+\v \D+\Z \D+\z \D+$/Bx
/\d+\D \d+\d \d+\S \d+\s \d+\W \d+\w \d+. \d+\R \d+\H \d+\h \d+\V \d+\v \d+\Z \d+\z \d+$/Bx
/\S+\D \S+\d \S+\S \S+\s \S+\W \S+\w \S+. \S+\R \S+\H \S+\h \S+\V \S+\v \S+\Z \S+\z \S+$/Bx
/\s+\D \s+\d \s+\S \s+\s \s+\W \s+\w \s+. \s+\R \s+\H \s+\h \s+\V \s+\v \s+\Z \s+\z \s+$/Bx
/\W+\D \W+\d \W+\S \W+\s \W+\W \W+\w \W+. \W+\R \W+\H \W+\h \W+\V \W+\v \W+\Z \W+\z \W+$/Bx
/\w+\D \w+\d \w+\S \w+\s \w+\W \w+\w \w+. \w+\R \w+\H \w+\h \w+\V \w+\v \w+\Z \w+\z \w+$/Bx
/\R+\D \R+\d \R+\S \R+\s \R+\W \R+\w \R+. \R+\R \R+\H \R+\h \R+\V \R+\v \R+\Z \R+\z \R+$/Bx
/\H+\D \H+\d \H+\S \H+\s \H+\W \H+\w \H+. \H+\R \H+\H \H+\h \H+\V \H+\v \H+\Z \H+\z \H+$/Bx
/\h+\D \h+\d \h+\S \h+\s \h+\W \h+\w \h+. \h+\R \h+\H \h+\h \h+\V \h+\v \h+\Z \h+\z \h+$/Bx
/\V+\D \V+\d \V+\S \V+\s \V+\W \V+\w \V+. \V+\R \V+\H \V+\h \V+\V \V+\v \V+\Z \V+\z \V+$/Bx
/\v+\D \v+\d \v+\S \v+\s \v+\W \v+\w \v+. \v+\R \v+\H \v+\h \v+\V \v+\v \v+\Z \v+\z \v+$/Bx
/ a+\D a+\d a+\S a+\s a+\W a+\w a+. a+\R a+\H a+\h a+\V a+\v a+\Z a+\z a+$/Bx
/\n+\D \n+\d \n+\S \n+\s \n+\W \n+\w \n+. \n+\R \n+\H \n+\h \n+\V \n+\v \n+\Z \n+\z \n+$/Bx
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bx
/ .+\D .+\d .+\S .+\s .+\W .+\w .+. .+\R .+\H .+\h .+\V .+\v .+\Z .+\z .+$/Bsx
/ \D+$ \d+$ \S+$ \s+$ \W+$ \w+$ \R+$ \H+$ \h+$ \V+$ \v+$ a+$ \n+$ .+$ .+$/Bmx
/(?=a+)a(a+)++a/B
/a+(bb|cc)a+(?:bb|cc)a+(?>bb|cc)a+(?:bb|cc)+a+(aa)a+(?:bb|aa)/B
/a+(bb|cc)?#a+(?:bb|cc)??#a+(?:bb|cc)?+#a+(?:bb|cc)*#a+(bb|cc)?a#a+(?:aa)?/B
/a+(?:bb)?a#a+(?:|||)#a+(?:|b)a#a+(?:|||)?a/B
/[ab]*/B
aaaa
/[ab]*?/B
aaaa
/[ab]?/B
aaaa
/[ab]??/B
aaaa
/[ab]+/B
aaaa
/[ab]+?/B
aaaa
/[ab]{2,3}/B
aaaa
/[ab]{2,3}?/B
aaaa
/[ab]{2,}/B
aaaa
/[ab]{2,}?/B
aaaa
/\d+\s{0,5}=\s*\S?=\w{0,4}\W*/B
/[a-d]{5,12}[e-z0-9]*#[^a-z]+[b-y]*a[2-7]?[^0-9a-z]+/B
/[a-z]*\s#[ \t]?\S#[a-c]*\S#[C-G]+?\d#[4-8]*\D#[4-9,]*\D#[!$]{0,5}\w#[M-Xf-l]+\W#[a-c,]?\W/B
/a+(aa|bb)*c#a*(bb|cc)*a#a?(bb|cc)*d#[a-f]*(g|hh)*f/B
/[a-f]*(g|hh|i)*i#[a-x]{4,}(y{0,6})*y#[a-k]+(ll|mm)+n/B
/[a-f]*(?>gg|hh)+#[a-f]*(?>gg|hh)?#[a-f]*(?>gg|hh)*a#[a-f]*(?>gg|hh)*h/B
/[a-c]*d/IB
/[a-c]+d/IB
/[a-c]?d/IB
/[a-c]{4,6}d/IB
/[a-c]{0,6}d/IB
# End of special auto-possessive tests
/^A\o{1239}B/
A\123B
/^A\oB/
/^A\x{zz}B/
/^A\x{12Z/
/^A\x{/
/[ab]++/B,no_auto_possess
/[^ab]*+/B,no_auto_possess
/a{4}+/B,no_auto_possess
/a{4}+/Bi,no_auto_possess
/[a-[:digit:]]+/
/[A-[:digit:]]+/
/[a-[.xxx.]]+/
/[a-[=xxx=]]+/
/[a-[!xxx!]]+/
/[A-[!xxx!]]+/
A]]]
/[a-\d]+/
/(?<0abc>xx)/
/(?&1abc)xx(?<1abc>y)/
/(?<ab-cd>xx)/
/(?'0abc'xx)/
/(?P<0abc>xx)/
/\k<5ghj>/
/\k'5ghj'/
/\k{2fgh}/
/(?P=8yuki)/
/\g{4df}/
/(?&1abc)xx(?<1abc>y)/
/(?P>1abc)xx(?<1abc>y)/
/\g'3gh'/
/\g<5fg>/
/(?(<4gh>)abc)/
/(?('4gh')abc)/
/(?(4gh)abc)/
/(?(R&6yh)abc)/
/(((a\2)|(a*)\g<-1>))*a?/B
# Test the ugly "start or end of word" compatibility syntax.
/[[:<:]]red[[:>:]]/B
little red riding hood
a /red/ thing
red is a colour
put it all on red
\= Expect no match
no reduction
Alfred Winifred
/[a[:<:]] should give error/
/(?=ab\K)/aftertext
abcd\=startchar
/abcd/newline=lf,firstline
\= Expect no match
xx\nxabcd
# Test stack guard external calls.
/(((a)))/stackguard=1
/(((a)))/stackguard=2
/(((a)))/stackguard=3
/(((((a)))))/
# End stack guard tests
/^\w+(?>\s*)(?<=\w)/B
/\othing/
/\o{}/
/\o{whatever}/
/\xthing/
/\x{}/
/\x{whatever}/
/A\8B/
/A\9B/
# This one is here because Perl fails to match "12" for this pattern when the $
# is present.
/^(?(?=abc)\w{3}:|\d\d)$/
abc:
12
\= Expect no match
123
xyz
# Perl gets this one wrong, giving "a" as the after text for ca and failing to
# match for cd.
/(?(?=ab)ab)/aftertext
abxxx
ca
cd
# This should test both paths for processing OP_RECURSE.
/(?(R)a+|(?R)b)/
aaaabcde
aaaabcde\=ovector=100
/a*?b*?/
ab
/(*NOTEMPTY)a*?b*?/
ab
ba
cb