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# This set of tests is for features that are compatible with all versions of
# Perl >= 5.10, in non-UTF mode. It should run clean for the 8-bit, 16-bit, and
# 32-bit PCRE libraries, and also using the perltest.pl script.
#forbid_utf
#perltest
/the quick brown fox/
the quick brown fox
The quick brown FOX
What do you know about the quick brown fox?
What do you know about THE QUICK BROWN FOX?
/The quick brown fox/i
the quick brown fox
The quick brown FOX
What do you know about the quick brown fox?
What do you know about THE QUICK BROWN FOX?
/abcd\t\n\r\f\a\e\071\x3b\$\\\?caxyz/
abcd\t\n\r\f\a\e9;\$\\?caxyz
/a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz/
abxyzpqrrrabbxyyyypqAzz
abxyzpqrrrabbxyyyypqAzz
aabxyzpqrrrabbxyyyypqAzz
aaabxyzpqrrrabbxyyyypqAzz
aaaabxyzpqrrrabbxyyyypqAzz
abcxyzpqrrrabbxyyyypqAzz
aabcxyzpqrrrabbxyyyypqAzz
aaabcxyzpqrrrabbxyyyypAzz
aaabcxyzpqrrrabbxyyyypqAzz
aaabcxyzpqrrrabbxyyyypqqAzz
aaabcxyzpqrrrabbxyyyypqqqAzz
aaabcxyzpqrrrabbxyyyypqqqqAzz
aaabcxyzpqrrrabbxyyyypqqqqqAzz
aaabcxyzpqrrrabbxyyyypqqqqqqAzz
aaaabcxyzpqrrrabbxyyyypqAzz
abxyzzpqrrrabbxyyyypqAzz
aabxyzzzpqrrrabbxyyyypqAzz
aaabxyzzzzpqrrrabbxyyyypqAzz
aaaabxyzzzzpqrrrabbxyyyypqAzz
abcxyzzpqrrrabbxyyyypqAzz
aabcxyzzzpqrrrabbxyyyypqAzz
aaabcxyzzzzpqrrrabbxyyyypqAzz
aaaabcxyzzzzpqrrrabbxyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
aaabcxyzpqrrrabbxyyyypABzz
aaabcxyzpqrrrabbxyyyypABBzz
>>>aaabxyzpqrrrabbxyyyypqAzz
>aaaabxyzpqrrrabbxyyyypqAzz
>>>>abcxyzpqrrrabbxyyyypqAzz
*** Failers
abxyzpqrrabbxyyyypqAzz
abxyzpqrrrrabbxyyyypqAzz
abxyzpqrrrabxyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyypqAzz
aaabcxyzpqrrrabbxyyyypqqqqqqqAzz
/^(abc){1,2}zz/
abczz
abcabczz
*** Failers
zz
abcabcabczz
>>abczz
/^(b+?|a){1,2}?c/
bc
bbc
bbbc
bac
bbac
aac
abbbbbbbbbbbc
bbbbbbbbbbbac
*** Failers
aaac
abbbbbbbbbbbac
/^(b+|a){1,2}c/
bc
bbc
bbbc
bac
bbac
aac
abbbbbbbbbbbc
bbbbbbbbbbbac
*** Failers
aaac
abbbbbbbbbbbac
/^(b+|a){1,2}?bc/
bbc
/^(b*|ba){1,2}?bc/
babc
bbabc
bababc
*** Failers
bababbc
babababc
/^(ba|b*){1,2}?bc/
babc
bbabc
bababc
*** Failers
bababbc
babababc
/^\ca\cA\c[;\c:/
\x01\x01\e;z
/^[ab\]cde]/
athing
bthing
]thing
cthing
dthing
ething
*** Failers
fthing
[thing
\\thing
/^[]cde]/
]thing
cthing
dthing
ething
*** Failers
athing
fthing
/^[^ab\]cde]/
fthing
[thing
\\thing
*** Failers
athing
bthing
]thing
cthing
dthing
ething
/^[^]cde]/
athing
fthing
*** Failers
]thing
cthing
dthing
ething
/^\<5C>/
<20>
/^<5E>/
<20>
/^[0-9]+$/
0
1
2
3
4
5
6
7
8
9
10
100
*** Failers
abc
/^.*nter/
enter
inter
uponter
/^xxx[0-9]+$/
xxx0
xxx1234
*** Failers
xxx
/^.+[0-9][0-9][0-9]$/
x123
xx123
123456
*** Failers
123
x1234
/^.+?[0-9][0-9][0-9]$/
x123
xx123
123456
*** Failers
123
x1234
/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
abc!pqr=apquxz.ixr.zzz.ac.uk
*** Failers
!pqr=apquxz.ixr.zzz.ac.uk
abc!=apquxz.ixr.zzz.ac.uk
abc!pqr=apquxz:ixr.zzz.ac.uk
abc!pqr=apquxz.ixr.zzz.ac.ukk
/:/
Well, we need a colon: somewhere
*** Fail if we don't
/([\da-f:]+)$/i
0abc
abc
fed
E
::
5f03:12C0::932e
fed def
Any old stuff
*** Failers
0zzz
gzzz
fed\x20
Any old rubbish
/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
.1.2.3
A.12.123.0
*** Failers
.1.2.3333
1.2.3
1234.2.3
/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
1 IN SOA non-sp1 non-sp2(
1 IN SOA non-sp1 non-sp2 (
*** Failers
1IN SOA non-sp1 non-sp2(
/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
a.
Z.
2.
ab-c.pq-r.
sxk.zzz.ac.uk.
x-.y-.
*** Failers
-abc.peq.
/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
*.a
*.b0-a
*.c3-b.c
*.c-a.b-c
*** Failers
*.0
*.a-
*.a-b.c-
*.c-a.0-c
/^(?=ab(de))(abd)(e)/
abde
/^(?!(ab)de|x)(abd)(f)/
abdf
/^(?=(ab(cd)))(ab)/
abcd
/^[\da-f](\.[\da-f])*$/i
a.b.c.d
A.B.C.D
a.b.c.1.2.3.C
/^\".*\"\s*(;.*)?$/
\"1234\"
\"abcd\" ;
\"\" ; rhubarb
*** Failers
\"1234\" : things
/^$/
\
*** Failers
/ ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/x
ab c
*** Failers
abc
ab cde
/(?x) ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/
ab c
*** Failers
abc
ab cde
/^ a\ b[c ]d $/x
a bcd
a b d
*** Failers
abcd
ab d
/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
abcdefhijklm
/^(?:a(b(c)))(?:d(e(f)))(?:h(i(j)))(?:k(l(m)))$/
abcdefhijklm
/^[\w][\W][\s][\S][\d][\D][\b][\n][\c]][\022]/
a+ Z0+\x08\n\x1d\x12
/^[.^$|()*+?{,}]+/
.^\$(*+)|{?,?}
/^a*\w/
z
az
aaaz
a
aa
aaaa
a+
aa+
/^a*?\w/
z
az
aaaz
a
aa
aaaa
a+
aa+
/^a+\w/
az
aaaz
aa
aaaa
aa+
/^a+?\w/
az
aaaz
aa
aaaa
aa+
/^\d{8}\w{2,}/
1234567890
12345678ab
12345678__
*** Failers
1234567
/^[aeiou\d]{4,5}$/
uoie
1234
12345
aaaaa
*** Failers
123456
/^[aeiou\d]{4,5}?/
uoie
1234
12345
aaaaa
123456
/\A(abc|def)=(\1){2,3}\Z/
abc=abcabc
def=defdefdef
*** Failers
abc=defdef
/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
abcdefghijkcda2
abcdefghijkkkkcda2
/(cat(a(ract|tonic)|erpillar)) \1()2(3)/
cataract cataract23
catatonic catatonic23
caterpillar caterpillar23
/^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]/
From abcd Mon Sep 01 12:33:02 1997
/^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
From abcd Mon Sep 01 12:33:02 1997
From abcd Mon Sep 1 12:33:02 1997
*** Failers
From abcd Sep 01 12:33:02 1997
/^12.34/s
12\n34
12\r34
/\w+(?=\t)/
the quick brown\t fox
/foo(?!bar)(.*)/
foobar is foolish see?
/(?:(?!foo)...|^.{0,2})bar(.*)/
foobar crowbar etc
barrel
2barrel
A barrel
/^(\D*)(?=\d)(?!123)/
abc456
*** Failers
abc123
/^1234(?# test newlines
inside)/
1234
/^1234 #comment in extended re
/x
1234
/#rhubarb
abcd/x
abcd
/^abcd#rhubarb/x
abcd
/^(a)\1{2,3}(.)/
aaab
aaaab
aaaaab
aaaaaab
/(?!^)abc/
the abc
*** Failers
abc
/(?=^)abc/
abc
*** Failers
the abc
/^[ab]{1,3}(ab*|b)/
aabbbbb
/^[ab]{1,3}?(ab*|b)/
aabbbbb
/^[ab]{1,3}?(ab*?|b)/
aabbbbb
/^[ab]{1,3}(ab*?|b)/
aabbbbb
/ (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* # optional leading comment
(?: (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
) # initial word
(?: (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
) )* # further okay, if led by a period
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* @ (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # initial subdomain
(?: #
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. # if led by a period...
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # ...further okay
)*
# address
| # or
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
) # one word, optionally followed by....
(?:
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] | # atom and space parts, or...
\(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) | # comments, or...
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
# quoted strings
)*
< (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* # leading <
(?: @ (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # initial subdomain
(?: #
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. # if led by a period...
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # ...further okay
)*
(?: (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* , (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* @ (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # initial subdomain
(?: #
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. # if led by a period...
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # ...further okay
)*
)* # further okay, if led by comma
: # closing colon
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* )? # optional route
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
) # initial word
(?: (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?: # opening quote...
[^\\\x80-\xff\n\015"] # Anything except backslash and quote
| # or
\\ [^\x80-\xff] # Escaped something (something != CR)
)* " # closing quote
) )* # further okay, if led by a period
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* @ (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # initial subdomain
(?: #
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* \. # if led by a period...
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
| \[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
) # ...further okay
)*
# address spec
(?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* > # trailing >
# name and address
) (?: [\040\t] | \(
(?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] | \( (?: [^\\\x80-\xff\n\015()] | \\ [^\x80-\xff] )* \) )*
\) )* # optional trailing comment
/x
Alan Other <user\@dom.ain>
<user\@dom.ain>
user\@dom.ain
\"A. Other\" <user.1234\@dom.ain> (a comment)
A. Other <user.1234\@dom.ain> (a comment)
\"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
A missing angle <user\@some.where
*** Failers
The quick brown fox
/[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional leading comment
(?:
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
| # or
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
# Quoted string
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
| # or
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
# Quoted string
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# additional words
)*
@
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
)*
# address
| # or
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
| # or
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
# Quoted string
)
# leading word
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] * # "normal" atoms and or spaces
(?:
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
|
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
) # "special" comment or quoted string
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] * # more "normal"
)*
<
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# <
(?:
@
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
)*
(?: ,
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
@
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
)*
)* # additional domains
:
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
)? # optional route
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
| # or
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
# Quoted string
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
| # or
" # "
[^\\\x80-\xff\n\015"] * # normal
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015"] * )* # ( special normal* )*
" # "
# Quoted string
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# additional words
)*
@
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+ # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[ # [
(?: [^\\\x80-\xff\n\015\[\]] | \\ [^\x80-\xff] )* # stuff
\] # ]
)
[\040\t]* # Nab whitespace.
(?:
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: # (
(?: \\ [^\x80-\xff] |
\( # (
[^\\\x80-\xff\n\015()] * # normal*
(?: \\ [^\x80-\xff] [^\\\x80-\xff\n\015()] * )* # (special normal*)*
\) # )
) # special
[^\\\x80-\xff\n\015()] * # normal*
)* # )*
\) # )
[\040\t]* )* # If comment found, allow more spaces.
# optional trailing comments
)*
# address spec
> # >
# name and address
)
/x
Alan Other <user\@dom.ain>
<user\@dom.ain>
user\@dom.ain
\"A. Other\" <user.1234\@dom.ain> (a comment)
A. Other <user.1234\@dom.ain> (a comment)
\"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
A missing angle <user\@some.where
*** Failers
The quick brown fox
/abc\0def\00pqr\000xyz\0000AB/
abc\0def\00pqr\000xyz\0000AB
abc456 abc\0def\00pqr\000xyz\0000ABCDE
/abc\x0def\x00pqr\x000xyz\x0000AB/
abc\x0def\x00pqr\x000xyz\x0000AB
abc456 abc\x0def\x00pqr\x000xyz\x0000ABCDE
/^[\000-\037]/
\0A
\01B
\037C
/\0*/
\0\0\0\0
/A\x0{2,3}Z/
The A\x0\x0Z
An A\0\x0\0Z
*** Failers
A\0Z
A\0\x0\0\x0Z
/^(cow|)\1(bell)/
cowcowbell
bell
*** Failers
cowbell
/^\s/
\040abc
\x0cabc
\nabc
\rabc
\tabc
*** Failers
abc
/^a b
c/x
abc
/^(a|)\1*b/
ab
aaaab
b
*** Failers
acb
/^(a|)\1+b/
aab
aaaab
b
*** Failers
ab
/^(a|)\1?b/
ab
aab
b
*** Failers
acb
/^(a|)\1{2}b/
aaab
b
*** Failers
ab
aab
aaaab
/^(a|)\1{2,3}b/
aaab
aaaab
b
*** Failers
ab
aab
aaaaab
/ab{1,3}bc/
abbbbc
abbbc
abbc
*** Failers
abc
abbbbbc
/([^.]*)\.([^:]*):[T ]+(.*)/
track1.title:TBlah blah blah
/([^.]*)\.([^:]*):[T ]+(.*)/i
track1.title:TBlah blah blah
/([^.]*)\.([^:]*):[t ]+(.*)/i
track1.title:TBlah blah blah
/^[W-c]+$/
WXY_^abc
*** Failers
wxy
/^[W-c]+$/i
WXY_^abc
wxy_^ABC
/^[\x3f-\x5F]+$/i
WXY_^abc
wxy_^ABC
/^abc$/m
abc
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/^abc$/
abc
*** Failers
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/\Aabc\Z/m
abc
abc\n
*** Failers
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/\A(.)*\Z/s
abc\ndef
/\A(.)*\Z/m
*** Failers
abc\ndef
/(?:b)|(?::+)/
b::c
c::b
/[-az]+/
az-
*** Failers
b
/[az-]+/
za-
*** Failers
b
/[a\-z]+/
a-z
*** Failers
b
/[a-z]+/
abcdxyz
/[\d-]+/
12-34
*** Failers
aaa
/[\d-z]+/
12-34z
*** Failers
aaa
/\x5c/
\\
/\x20Z/
the Zoo
*** Failers
Zulu
/(abc)\1/i
abcabc
ABCabc
abcABC
/ab{3cd/
ab{3cd
/ab{3,cd/
ab{3,cd
/ab{3,4a}cd/
ab{3,4a}cd
/{4,5a}bc/
{4,5a}bc
/abc$/
abc
abc\n
*** Failers
abc\ndef
/(abc)\123/
abc\x53
/(abc)\223/
abc\x93
/(abc)\323/
abc\xd3
/(abc)\100/
abc\x40
abc\100
/(abc)\1000/
abc\x400
abc\x40\x30
abc\1000
abc\100\x30
abc\100\060
abc\100\60
/^(A)(B)(C)(D)(E)(F)(G)(H)(I)\8\9$/
ABCDEFGHIHI
/^[A\8B\9C]+$/
A8B9C
*** Failers
A8B9C\x00
/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\12\123/
abcdefghijkllS
/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\12\123/
abcdefghijk\12S
/a{0}bc/
bc
/(a|(bc)){0,0}?xyz/
xyz
/abc[\10]de/
abc\010de
/abc[\1]de/
abc\1de
/(abc)[\1]de/
abc\1de
/(?s)a.b/
a\nb
/^([^a])([^\b])([^c]*)([^d]{3,4})/
baNOTccccd
baNOTcccd
baNOTccd
bacccd
*** Failers
anything
b\bc
baccd
/[^a]/
Abc
/[^a]/i
Abc
/[^a]+/
AAAaAbc
/[^a]+/i
AAAaAbc
/[^a]+/
bbb\nccc
/[^k]$/
abc
*** Failers
abk
/[^k]{2,3}$/
abc
kbc
kabc
*** Failers
abk
akb
akk
/^\d{8,}\@.+[^k]$/
12345678\@a.b.c.d
123456789\@x.y.z
*** Failers
12345678\@x.y.uk
1234567\@a.b.c.d
/(a)\1{8,}/
aaaaaaaaa
aaaaaaaaaa
*** Failers
aaaaaaa
/[^a]/
aaaabcd
aaAabcd
/[^a]/i
aaaabcd
aaAabcd
/[^az]/
aaaabcd
aaAabcd
/[^az]/i
aaaabcd
aaAabcd
/\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377/
\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377
/P[^*]TAIRE[^*]{1,6}?LL/
xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
/P[^*]TAIRE[^*]{1,}?LL/
xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
/(\.\d\d[1-9]?)\d+/
1.230003938
1.875000282
1.235
/(\.\d\d((?=0)|\d(?=\d)))/
1.230003938
1.875000282
*** Failers
1.235
/a(?)b/
ab
/\b(foo)\s+(\w+)/i
Food is on the foo table
/foo(.*)bar/
The food is under the bar in the barn.
/foo(.*?)bar/
The food is under the bar in the barn.
/(.*)(\d*)/
I have 2 numbers: 53147
/(.*)(\d+)/
I have 2 numbers: 53147
/(.*?)(\d*)/
I have 2 numbers: 53147
/(.*?)(\d+)/
I have 2 numbers: 53147
/(.*)(\d+)$/
I have 2 numbers: 53147
/(.*?)(\d+)$/
I have 2 numbers: 53147
/(.*)\b(\d+)$/
I have 2 numbers: 53147
/(.*\D)(\d+)$/
I have 2 numbers: 53147
/^\D*(?!123)/
ABC123
/^(\D*)(?=\d)(?!123)/
ABC445
*** Failers
ABC123
/^[W-]46]/
W46]789
-46]789
*** Failers
Wall
Zebra
42
[abcd]
]abcd[
/^[W-\]46]/
W46]789
Wall
Zebra
Xylophone
42
[abcd]
]abcd[
\\backslash
*** Failers
-46]789
well
/\d\d\/\d\d\/\d\d\d\d/
01/01/2000
/word (?:[a-zA-Z0-9]+ ){0,10}otherword/
word cat dog elephant mussel cow horse canary baboon snake shark otherword
word cat dog elephant mussel cow horse canary baboon snake shark
/word (?:[a-zA-Z0-9]+ ){0,300}otherword/
word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
/^(a){0,0}/
bcd
abc
aab
/^(a){0,1}/
bcd
abc
aab
/^(a){0,2}/
bcd
abc
aab
/^(a){0,3}/
bcd
abc
aab
aaa
/^(a){0,}/
bcd
abc
aab
aaa
aaaaaaaa
/^(a){1,1}/
bcd
abc
aab
/^(a){1,2}/
bcd
abc
aab
/^(a){1,3}/
bcd
abc
aab
aaa
/^(a){1,}/
bcd
abc
aab
aaa
aaaaaaaa
/.*\.gif/
borfle\nbib.gif\nno
/.{0,}\.gif/
borfle\nbib.gif\nno
/.*\.gif/m
borfle\nbib.gif\nno
/.*\.gif/s
borfle\nbib.gif\nno
/.*\.gif/ms
borfle\nbib.gif\nno
/.*$/
borfle\nbib.gif\nno
/.*$/m
borfle\nbib.gif\nno
/.*$/s
borfle\nbib.gif\nno
/.*$/ms
borfle\nbib.gif\nno
/.*$/
borfle\nbib.gif\nno\n
/.*$/m
borfle\nbib.gif\nno\n
/.*$/s
borfle\nbib.gif\nno\n
/.*$/ms
borfle\nbib.gif\nno\n
/(.*X|^B)/
abcde\n1234Xyz
BarFoo
*** Failers
abcde\nBar
/(.*X|^B)/m
abcde\n1234Xyz
BarFoo
abcde\nBar
/(.*X|^B)/s
abcde\n1234Xyz
BarFoo
*** Failers
abcde\nBar
/(.*X|^B)/ms
abcde\n1234Xyz
BarFoo
abcde\nBar
/(?s)(.*X|^B)/
abcde\n1234Xyz
BarFoo
*** Failers
abcde\nBar
/(?s:.*X|^B)/
abcde\n1234Xyz
BarFoo
*** Failers
abcde\nBar
/^.*B/
**** Failers
abc\nB
/(?s)^.*B/
abc\nB
/(?m)^.*B/
abc\nB
/(?ms)^.*B/
abc\nB
/(?ms)^B/
abc\nB
/(?s)B$/
B\n
/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]/
123456654321
/^\d\d\d\d\d\d\d\d\d\d\d\d/
123456654321
/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
123456654321
/^[abc]{12}/
abcabcabcabc
/^[a-c]{12}/
abcabcabcabc
/^(a|b|c){12}/
abcabcabcabc
/^[abcdefghijklmnopqrstuvwxy0123456789]/
n
*** Failers
z
/abcde{0,0}/
abcd
*** Failers
abce
/ab[cd]{0,0}e/
abe
*** Failers
abcde
/ab(c){0,0}d/
abd
*** Failers
abcd
/a(b*)/
a
ab
abbbb
*** Failers
bbbbb
/ab\d{0}e/
abe
*** Failers
ab1e
/"([^\\"]+|\\.)*"/
the \"quick\" brown fox
\"the \\\"quick\\\" brown fox\"
/.*?/g,aftertext
abc
/\b/g,aftertext
abc
/\b/g,aftertext
abc
//g
abc
/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
<TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>
/a[^a]b/
acb
a\nb
/a.b/
acb
*** Failers
a\nb
/a[^a]b/s
acb
a\nb
/a.b/s
acb
a\nb
/^(b+?|a){1,2}?c/
bac
bbac
bbbac
bbbbac
bbbbbac
/^(b+|a){1,2}?c/
bac
bbac
bbbac
bbbbac
bbbbbac
/(?!\A)x/m
x\nb\n
a\bx\n
/\x0{ab}/
\0{ab}
/(A|B)*?CD/
CD
/(A|B)*CD/
CD
/(AB)*?\1/
ABABAB
/(AB)*\1/
ABABAB
/(?<!bar)foo/
foo
catfood
arfootle
rfoosh
*** Failers
barfoo
towbarfoo
/\w{3}(?<!bar)foo/
catfood
*** Failers
foo
barfoo
towbarfoo
/(?<=(foo)a)bar/
fooabar
*** Failers
bar
foobbar
/\Aabc\z/m
abc
*** Failers
abc\n
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
"(?>.*/)foo"
/this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/
"(?>.*/)foo"
/this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
/(?>(\.\d\d[1-9]?))\d+/
1.230003938
1.875000282
*** Failers
1.235
/^((?>\w+)|(?>\s+))*$/
now is the time for all good men to come to the aid of the party
*** Failers
this is not a line with only words and spaces!
/(\d+)(\w)/
12345a
12345+
/((?>\d+))(\w)/
12345a
*** Failers
12345+
/(?>a+)b/
aaab
/((?>a+)b)/
aaab
/(?>(a+))b/
aaab
/(?>b)+/
aaabbbccc
/(?>a+|b+|c+)*c/
aaabbbbccccd
/((?>[^()]+)|\([^()]*\))+/
((abc(ade)ufh()()x
/\(((?>[^()]+)|\([^()]+\))+\)/
(abc)
(abc(def)xyz)
*** Failers
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/a(?-i)b/i
ab
Ab
*** Failers
aB
AB
/(a (?x)b c)d e/
a bcd e
*** Failers
a b cd e
abcd e
a bcde
/(a b(?x)c d (?-x)e f)/
a bcde f
*** Failers
abcdef
/(a(?i)b)c/
abc
aBc
*** Failers
abC
aBC
Abc
ABc
ABC
AbC
/a(?i:b)c/
abc
aBc
*** Failers
ABC
abC
aBC
/a(?i:b)*c/
aBc
aBBc
*** Failers
aBC
aBBC
/a(?=b(?i)c)\w\wd/
abcd
abCd
*** Failers
aBCd
abcD
/(?s-i:more.*than).*million/i
more than million
more than MILLION
more \n than Million
*** Failers
MORE THAN MILLION
more \n than \n million
/(?:(?s-i)more.*than).*million/i
more than million
more than MILLION
more \n than Million
*** Failers
MORE THAN MILLION
more \n than \n million
/(?>a(?i)b+)+c/
abc
aBbc
aBBc
*** Failers
Abc
abAb
abbC
/(?=a(?i)b)\w\wc/
abc
aBc
*** Failers
Ab
abC
aBC
/(?<=a(?i)b)(\w\w)c/
abxxc
aBxxc
*** Failers
Abxxc
ABxxc
abxxC
/(?:(a)|b)(?(1)A|B)/
aA
bB
*** Failers
aB
bA
/^(a)?(?(1)a|b)+$/
aa
b
bb
*** Failers
ab
# Perl gets this next one wrong if the pattern ends with $; in that case it
# fails to match "12".
/^(?(?=abc)\w{3}:|\d\d)/
abc:
12
123
*** Failers
xyz
/^(?(?!abc)\d\d|\w{3}:)$/
abc:
12
*** Failers
123
xyz
/(?(?<=foo)bar|cat)/
foobar
cat
fcat
focat
*** Failers
foocat
/(?(?<!foo)cat|bar)/
foobar
cat
fcat
focat
*** Failers
foocat
/( \( )? [^()]+ (?(1) \) |) /x
abcd
(abcd)
the quick (abcd) fox
(abcd
/( \( )? [^()]+ (?(1) \) ) /x
abcd
(abcd)
the quick (abcd) fox
(abcd
/^(?(2)a|(1)(2))+$/
12
12a
12aa
*** Failers
1234
/((?i)blah)\s+\1/
blah blah
BLAH BLAH
Blah Blah
blaH blaH
*** Failers
blah BLAH
Blah blah
blaH blah
/((?i)blah)\s+(?i:\1)/
blah blah
BLAH BLAH
Blah Blah
blaH blaH
blah BLAH
Blah blah
blaH blah
/(?>a*)*/
a
aa
aaaa
/(abc|)+/
abc
abcabc
abcabcabc
xyz
/([a]*)*/
a
aaaaa
/([ab]*)*/
a
b
ababab
aaaabcde
bbbb
/([^a]*)*/
b
bbbb
aaa
/([^ab]*)*/
cccc
abab
/([a]*?)*/
a
aaaa
/([ab]*?)*/
a
b
abab
baba
/([^a]*?)*/
b
bbbb
aaa
/([^ab]*?)*/
c
cccc
baba
/(?>a*)*/
a
aaabcde
/((?>a*))*/
aaaaa
aabbaa
/((?>a*?))*/
aaaaa
aabbaa
/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /x
12-sep-98
12-09-98
*** Failers
sep-12-98
/(?<=(foo))bar\1/
foobarfoo
foobarfootling
*** Failers
foobar
barfoo
/(?i:saturday|sunday)/
saturday
sunday
Saturday
Sunday
SATURDAY
SUNDAY
SunDay
/(a(?i)bc|BB)x/
abcx
aBCx
bbx
BBx
*** Failers
abcX
aBCX
bbX
BBX
/^([ab](?i)[cd]|[ef])/
ac
aC
bD
elephant
Europe
frog
France
*** Failers
Africa
/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
ab
aBd
xy
xY
zebra
Zambesi
*** Failers
aCD
XY
/(?<=foo\n)^bar/m
foo\nbar
*** Failers
bar
baz\nbar
/(?<=(?<!foo)bar)baz/
barbaz
barbarbaz
koobarbaz
*** Failers
baz
foobarbaz
/The cases of aaaa and aaaaaa are missed out below because Perl does things/
/differently. We know that odd, and maybe incorrect, things happen with/
/recursive references in Perl, as far as 5.11.3 - see some stuff in test #2./
/^(a\1?){4}$/
a
aa
aaa
aaaaa
aaaaaaa
aaaaaaaa
aaaaaaaaa
aaaaaaaaaa
aaaaaaaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaaa
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaa
/^(a\1?)(a\1?)(a\2?)(a\3?)$/
a
aa
aaa
aaaa
aaaaa
aaaaaa
aaaaaaa
aaaaaaaa
aaaaaaaaa
aaaaaaaaaa
aaaaaaaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaaa
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaa
/The following tests are taken from the Perl 5.005 test suite; some of them/
/are compatible with 5.004, but I'd rather not have to sort them out./
/abc/
abc
xabcy
ababc
*** Failers
xbc
axc
abx
/ab*c/
abc
/ab*bc/
abc
abbc
abbbbc
/.{1}/
abbbbc
/.{3,4}/
abbbbc
/ab{0,}bc/
abbbbc
/ab+bc/
abbc
*** Failers
abc
abq
/ab{1,}bc/
/ab+bc/
abbbbc
/ab{1,}bc/
abbbbc
/ab{1,3}bc/
abbbbc
/ab{3,4}bc/
abbbbc
/ab{4,5}bc/
*** Failers
abq
abbbbc
/ab?bc/
abbc
abc
/ab{0,1}bc/
abc
/ab?bc/
/ab?c/
abc
/ab{0,1}c/
abc
/^abc$/
abc
*** Failers
abbbbc
abcc
/^abc/
abcc
/^abc$/
/abc$/
aabc
*** Failers
aabc
aabcd
/^/
abc
/$/
abc
/a.c/
abc
axc
/a.*c/
axyzc
/a[bc]d/
abd
*** Failers
axyzd
abc
/a[b-d]e/
ace
/a[b-d]/
aac
/a[-b]/
a-
/a[b-]/
a-
/a]/
a]
/a[]]b/
a]b
/a[^bc]d/
aed
*** Failers
abd
abd
/a[^-b]c/
adc
/a[^]b]c/
adc
*** Failers
a-c
a]c
/\ba\b/
a-
-a
-a-
/\by\b/
*** Failers
xy
yz
xyz
/\Ba\B/
*** Failers
a-
-a
-a-
/\By\b/
xy
/\by\B/
yz
/\By\B/
xyz
/\w/
a
/\W/
-
*** Failers
-
a
/a\sb/
a b
/a\Sb/
a-b
*** Failers
a-b
a b
/\d/
1
/\D/
-
*** Failers
-
1
/[\w]/
a
/[\W]/
-
*** Failers
-
a
/a[\s]b/
a b
/a[\S]b/
a-b
*** Failers
a-b
a b
/[\d]/
1
/[\D]/
-
*** Failers
-
1
/ab|cd/
abc
abcd
/()ef/
def
/$b/
/a\(b/
a(b
/a\(*b/
ab
a((b
/a\\b/
a\\b
/((a))/
abc
/(a)b(c)/
abc
/a+b+c/
aabbabc
/a{1,}b{1,}c/
aabbabc
/a.+?c/
abcabc
/(a+|b)*/
ab
/(a+|b){0,}/
ab
/(a+|b)+/
ab
/(a+|b){1,}/
ab
/(a+|b)?/
ab
/(a+|b){0,1}/
ab
/[^ab]*/
cde
/abc/
*** Failers
b
/a*/
/([abc])*d/
abbbcd
/([abc])*bcd/
abcd
/a|b|c|d|e/
e
/(a|b|c|d|e)f/
ef
/abcd*efg/
abcdefg
/ab*/
xabyabbbz
xayabbbz
/(ab|cd)e/
abcde
/[abhgefdc]ij/
hij
/^(ab|cd)e/
/(abc|)ef/
abcdef
/(a|b)c*d/
abcd
/(ab|ab*)bc/
abc
/a([bc]*)c*/
abc
/a([bc]*)(c*d)/
abcd
/a([bc]+)(c*d)/
abcd
/a([bc]*)(c+d)/
abcd
/a[bcd]*dcdcde/
adcdcde
/a[bcd]+dcdcde/
*** Failers
abcde
adcdcde
/(ab|a)b*c/
abc
/((a)(b)c)(d)/
abcd
/[a-zA-Z_][a-zA-Z0-9_]*/
alpha
/^a(bc+|b[eh])g|.h$/
abh
/(bc+d$|ef*g.|h?i(j|k))/
effgz
ij
reffgz
*** Failers
effg
bcdd
/((((((((((a))))))))))/
a
/((((((((((a))))))))))\10/
aa
/(((((((((a)))))))))/
a
/multiple words of text/
*** Failers
aa
uh-uh
/multiple words/
multiple words, yeah
/(.*)c(.*)/
abcde
/\((.*), (.*)\)/
(a, b)
/[k]/
/abcd/
abcd
/a(bc)d/
abcd
/a[-]?c/
ac
/(abc)\1/
abcabc
/([a-c]*)\1/
abcabc
/(a)|\1/
a
*** Failers
ab
x
/(([a-c])b*?\2)*/
ababbbcbc
/(([a-c])b*?\2){3}/
ababbbcbc
/((\3|b)\2(a)x)+/
aaaxabaxbaaxbbax
/((\3|b)\2(a)){2,}/
bbaababbabaaaaabbaaaabba
/abc/i
ABC
XABCY
ABABC
*** Failers
aaxabxbaxbbx
XBC
AXC
ABX
/ab*c/i
ABC
/ab*bc/i
ABC
ABBC
/ab*?bc/i
ABBBBC
/ab{0,}?bc/i
ABBBBC
/ab+?bc/i
ABBC
/ab+bc/i
*** Failers
ABC
ABQ
/ab{1,}bc/i
/ab+bc/i
ABBBBC
/ab{1,}?bc/i
ABBBBC
/ab{1,3}?bc/i
ABBBBC
/ab{3,4}?bc/i
ABBBBC
/ab{4,5}?bc/i
*** Failers
ABQ
ABBBBC
/ab??bc/i
ABBC
ABC
/ab{0,1}?bc/i
ABC
/ab??bc/i
/ab??c/i
ABC
/ab{0,1}?c/i
ABC
/^abc$/i
ABC
*** Failers
ABBBBC
ABCC
/^abc/i
ABCC
/^abc$/i
/abc$/i
AABC
/^/i
ABC
/$/i
ABC
/a.c/i
ABC
AXC
/a.*?c/i
AXYZC
/a.*c/i
*** Failers
AABC
AXYZD
/a[bc]d/i
ABD
/a[b-d]e/i
ACE
*** Failers
ABC
ABD
/a[b-d]/i
AAC
/a[-b]/i
A-
/a[b-]/i
A-
/a]/i
A]
/a[]]b/i
A]B
/a[^bc]d/i
AED
/a[^-b]c/i
ADC
*** Failers
ABD
A-C
/a[^]b]c/i
ADC
/ab|cd/i
ABC
ABCD
/()ef/i
DEF
/$b/i
*** Failers
A]C
B
/a\(b/i
A(B
/a\(*b/i
AB
A((B
/a\\b/i
A\\b
a\\B
/((a))/i
ABC
/(a)b(c)/i
ABC
/a+b+c/i
AABBABC
/a{1,}b{1,}c/i
AABBABC
/a.+?c/i
ABCABC
/a.*?c/i
ABCABC
/a.{0,5}?c/i
ABCABC
/(a+|b)*/i
AB
/(a+|b){0,}/i
AB
/(a+|b)+/i
AB
/(a+|b){1,}/i
AB
/(a+|b)?/i
AB
/(a+|b){0,1}/i
AB
/(a+|b){0,1}?/i
AB
/[^ab]*/i
CDE
/abc/i
/a*/i
/([abc])*d/i
ABBBCD
/([abc])*bcd/i
ABCD
/a|b|c|d|e/i
E
/(a|b|c|d|e)f/i
EF
/abcd*efg/i
ABCDEFG
/ab*/i
XABYABBBZ
XAYABBBZ
/(ab|cd)e/i
ABCDE
/[abhgefdc]ij/i
HIJ
/^(ab|cd)e/i
ABCDE
/(abc|)ef/i
ABCDEF
/(a|b)c*d/i
ABCD
/(ab|ab*)bc/i
ABC
/a([bc]*)c*/i
ABC
/a([bc]*)(c*d)/i
ABCD
/a([bc]+)(c*d)/i
ABCD
/a([bc]*)(c+d)/i
ABCD
/a[bcd]*dcdcde/i
ADCDCDE
/a[bcd]+dcdcde/i
/(ab|a)b*c/i
ABC
/((a)(b)c)(d)/i
ABCD
/[a-zA-Z_][a-zA-Z0-9_]*/i
ALPHA
/^a(bc+|b[eh])g|.h$/i
ABH
/(bc+d$|ef*g.|h?i(j|k))/i
EFFGZ
IJ
REFFGZ
*** Failers
ADCDCDE
EFFG
BCDD
/((((((((((a))))))))))/i
A
/((((((((((a))))))))))\10/i
AA
/(((((((((a)))))))))/i
A
/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))/i
A
/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/i
C
/multiple words of text/i
*** Failers
AA
UH-UH
/multiple words/i
MULTIPLE WORDS, YEAH
/(.*)c(.*)/i
ABCDE
/\((.*), (.*)\)/i
(A, B)
/[k]/i
/abcd/i
ABCD
/a(bc)d/i
ABCD
/a[-]?c/i
AC
/(abc)\1/i
ABCABC
/([a-c]*)\1/i
ABCABC
/a(?!b)./
abad
/a(?=d)./
abad
/a(?=c|d)./
abad
/a(?:b|c|d)(.)/
ace
/a(?:b|c|d)*(.)/
ace
/a(?:b|c|d)+?(.)/
ace
acdbcdbe
/a(?:b|c|d)+(.)/
acdbcdbe
/a(?:b|c|d){2}(.)/
acdbcdbe
/a(?:b|c|d){4,5}(.)/
acdbcdbe
/a(?:b|c|d){4,5}?(.)/
acdbcdbe
/((foo)|(bar))*/
foobar
/a(?:b|c|d){6,7}(.)/
acdbcdbe
/a(?:b|c|d){6,7}?(.)/
acdbcdbe
/a(?:b|c|d){5,6}(.)/
acdbcdbe
/a(?:b|c|d){5,6}?(.)/
acdbcdbe
/a(?:b|c|d){5,7}(.)/
acdbcdbe
/a(?:b|c|d){5,7}?(.)/
acdbcdbe
/a(?:b|(c|e){1,2}?|d)+?(.)/
ace
/^(.+)?B/
AB
/^([^a-z])|(\^)$/
.
/^[<>]&/
<&OUT
/^(a\1?){4}$/
aaaaaaaaaa
*** Failers
AB
aaaaaaaaa
aaaaaaaaaaa
/^(a(?(1)\1)){4}$/
aaaaaaaaaa
*** Failers
aaaaaaaaa
aaaaaaaaaaa
/(?:(f)(o)(o)|(b)(a)(r))*/
foobar
/(?<=a)b/
ab
*** Failers
cb
b
/(?<!c)b/
ab
b
b
/(?:..)*a/
aba
/(?:..)*?a/
aba
/^(?:b|a(?=(.)))*\1/
abc
/^(){3,5}/
abc
/^(a+)*ax/
aax
/^((a|b)+)*ax/
aax
/^((a|bc)+)*ax/
aax
/(a|x)*ab/
cab
/(a)*ab/
cab
/(?:(?i)a)b/
ab
/((?i)a)b/
ab
/(?:(?i)a)b/
Ab
/((?i)a)b/
Ab
/(?:(?i)a)b/
*** Failers
cb
aB
/((?i)a)b/
/(?i:a)b/
ab
/((?i:a))b/
ab
/(?i:a)b/
Ab
/((?i:a))b/
Ab
/(?i:a)b/
*** Failers
aB
aB
/((?i:a))b/
/(?:(?-i)a)b/i
ab
/((?-i)a)b/i
ab
/(?:(?-i)a)b/i
aB
/((?-i)a)b/i
aB
/(?:(?-i)a)b/i
*** Failers
aB
Ab
/((?-i)a)b/i
/(?:(?-i)a)b/i
aB
/((?-i)a)b/i
aB
/(?:(?-i)a)b/i
*** Failers
Ab
AB
/((?-i)a)b/i
/(?-i:a)b/i
ab
/((?-i:a))b/i
ab
/(?-i:a)b/i
aB
/((?-i:a))b/i
aB
/(?-i:a)b/i
*** Failers
AB
Ab
/((?-i:a))b/i
/(?-i:a)b/i
aB
/((?-i:a))b/i
aB
/(?-i:a)b/i
*** Failers
Ab
AB
/((?-i:a))b/i
/((?-i:a.))b/i
*** Failers
AB
a\nB
/((?s-i:a.))b/i
a\nB
/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
cabbbb
/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
/(ab)\d\1/i
Ab4ab
ab4Ab
/foo\w*\d{4}baz/
foobar1234baz
/x(~~)*(?:(?:F)?)?/
x~~
/^a(?#xxx){3}c/
aaac
/^a (?#xxx) (?#yyy) {3}c/x
aaac
/(?<![cd])b/
*** Failers
B\nB
dbcb
/(?<![cd])[ab]/
dbaacb
/(?<!(c|d))b/
/(?<!(c|d))[ab]/
dbaacb
/(?<!cd)[ab]/
cdaccb
/^(?:a?b?)*$/
\
a
ab
aaa
*** Failers
dbcb
a--
aa--
/((?s)^a(.))((?m)^b$)/
a\nb\nc\n
/((?m)^b$)/
a\nb\nc\n
/(?m)^b/
a\nb\n
/(?m)^(b)/
a\nb\n
/((?m)^b)/
a\nb\n
/\n((?m)^b)/
a\nb\n
/((?s).)c(?!.)/
a\nb\nc\n
a\nb\nc\n
/((?s)b.)c(?!.)/
a\nb\nc\n
a\nb\nc\n
/^b/
/()^b/
*** Failers
a\nb\nc\n
a\nb\nc\n
/((?m)^b)/
a\nb\nc\n
/(x)?(?(1)a|b)/
*** Failers
a
a
/(x)?(?(1)b|a)/
a
/()?(?(1)b|a)/
a
/()(?(1)b|a)/
/()?(?(1)a|b)/
a
/^(\()?blah(?(1)(\)))$/
(blah)
blah
*** Failers
a
blah)
(blah
/^(\(+)?blah(?(1)(\)))$/
(blah)
blah
*** Failers
blah)
(blah
/(?(?!a)a|b)/
/(?(?!a)b|a)/
a
/(?(?=a)b|a)/
*** Failers
a
a
/(?(?=a)a|b)/
a
/(?=(a+?))(\1ab)/
aaab
/^(?=(a+?))\1ab/
/(\w+:)+/
one:
/$(?<=^(a))/
a
/(?=(a+?))(\1ab)/
aaab
/^(?=(a+?))\1ab/
*** Failers
aaab
aaab
/([\w:]+::)?(\w+)$/
abcd
xy:z:::abcd
/^[^bcd]*(c+)/
aexycd
/(a*)b+/
caab
/([\w:]+::)?(\w+)$/
abcd
xy:z:::abcd
*** Failers
abcd:
abcd:
/^[^bcd]*(c+)/
aexycd
/(>a+)ab/
/(?>a+)b/
aaab
/([[:]+)/
a:[b]:
/([[=]+)/
a=[b]=
/([[.]+)/
a.[b].
/((?>a+)b)/
aaab
/(?>(a+))b/
aaab
/((?>[^()]+)|\([^()]*\))+/
((abc(ade)ufh()()x
/a\Z/
*** Failers
aaab
a\nb\n
/b\Z/
a\nb\n
/b\z/
/b\Z/
a\nb
/b\z/
a\nb
*** Failers
/^(?>(?(1)\.|())[^\W_](?>[a-z0-9-]*[^\W_])?)+$/
a
abc
a-b
0-9
a.b
5.6.7
the.quick.brown.fox
a100.b200.300c
12-ab.1245
*** Failers
\
.a
-a
a-
a.
a_b
a.-
a..
ab..bc
the.quick.brown.fox-
the.quick.brown.fox.
the.quick.brown.fox_
the.quick.brown.fox+
/(?>.*)(?<=(abcd|wxyz))/
alphabetabcd
endingwxyz
*** Failers
a rather long string that doesn't end with one of them
/word (?>(?:(?!otherword)[a-zA-Z0-9]+ ){0,30})otherword/
word cat dog elephant mussel cow horse canary baboon snake shark otherword
word cat dog elephant mussel cow horse canary baboon snake shark
/word (?>[a-zA-Z0-9]+ ){0,30}otherword/
word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope
/(?<=\d{3}(?!999))foo/
999foo
123999foo
*** Failers
123abcfoo
/(?<=(?!...999)\d{3})foo/
999foo
123999foo
*** Failers
123abcfoo
/(?<=\d{3}(?!999)...)foo/
123abcfoo
123456foo
*** Failers
123999foo
/(?<=\d{3}...)(?<!999)foo/
123abcfoo
123456foo
*** Failers
123999foo
/<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
/isx
<a href=abcd xyz
<a href=\"abcd xyz pqr\" cats
<a href=\'abcd xyz pqr\' cats
/<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
/isx
<a href=abcd xyz
<a href=\"abcd xyz pqr\" cats
<a href = \'abcd xyz pqr\' cats
/<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
/isx
<a href=abcd xyz
<a href=\"abcd xyz pqr\" cats
<a href = \'abcd xyz pqr\' cats
/((Z)+|A)*/
ZABCDEFG
/(Z()|A)*/
ZABCDEFG
/(Z(())|A)*/
ZABCDEFG
/((?>Z)+|A)*/
ZABCDEFG
/((?>)+|A)*/
ZABCDEFG
/a*/g
abbab
/^[\d-a]/
abcde
-things
0digit
*** Failers
bcdef
/[[:space:]]+/
> \x09\x0a\x0c\x0d\x0b<
/[[:blank:]]+/
> \x09\x0a\x0c\x0d\x0b<
/[\s]+/
> \x09\x0a\x0c\x0d\x0b<
/\s+/
> \x09\x0a\x0c\x0d\x0b<
/a b/x
ab
/(?!\A)x/m
a\nxb\n
/(?!^)x/m
a\nxb\n
/abc\Qabc\Eabc/
abcabcabc
/abc\Q(*+|\Eabc/
abc(*+|abc
/ abc\Q abc\Eabc/x
abc abcabc
*** Failers
abcabcabc
/abc#comment
\Q#not comment
literal\E/x
abc#not comment\n literal
/abc#comment
\Q#not comment
literal/x
abc#not comment\n literal
/abc#comment
\Q#not comment
literal\E #more comment
/x
abc#not comment\n literal
/abc#comment
\Q#not comment
literal\E #more comment/x
abc#not comment\n literal
/\Qabc\$xyz\E/
abc\\\$xyz
/\Qabc\E\$\Qxyz\E/
abc\$xyz
/\Gabc/
abc
*** Failers
xyzabc
/\Gabc./g
abc1abc2xyzabc3
/abc./g
abc1abc2xyzabc3
/a(?x: b c )d/
XabcdY
*** Failers
Xa b c d Y
/((?x)x y z | a b c)/
XabcY
AxyzB
/(?i)AB(?-i)C/
XabCY
*** Failers
XabcY
/((?i)AB(?-i)C|D)E/
abCE
DE
*** Failers
abcE
abCe
dE
De
/(.*)\d+\1/
abc123abc
abc123bc
/(.*)\d+\1/s
abc123abc
abc123bc
/((.*))\d+\1/
abc123abc
abc123bc
# This tests for an IPv6 address in the form where it can have up to
# eight components, one and only one of which is empty. This must be
# an internal component.
/^(?!:) # 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
/ix
a123::a123
a123:b342::abcd
a123:b342::324e:abcd
a123:ddde:b342::324e:abcd
a123:ddde:b342::324e:dcba:abcd
a123:ddde:9999:b342::324e:dcba:abcd
*** Failers
1:2:3:4:5:6:7:8
a123:bce:ddde:9999:b342::324e:dcba:abcd
a123::9999:b342::324e:dcba:abcd
abcde:2:3:4:5:6:7:8
::1
abcd:fee0:123::
:1
1:
/[z\Qa-d]\E]/
z
a
-
d
]
*** Failers
b
/(a+)*b/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/(?i)reg(?:ul(?:[a<>]|ae)r|ex)/
REGular
regulaer
Regex
regul<75>r
/<2F><><EFBFBD><EFBFBD>[<5B>-<2D><>-<2D>]+/
<20><><EFBFBD><EFBFBD><EFBFBD>
<20><><EFBFBD><EFBFBD><EFBFBD>
<20><><EFBFBD><EFBFBD><EFBFBD>
<20><><EFBFBD><EFBFBD><EFBFBD>
/(?<=Z)X./
\x84XAZXB
/ab cd (?x) de fg/
ab cd defg
/ab cd(?x) de fg/
ab cddefg
** Failers
abcddefg
/(?<![^f]oo)(bar)/
foobarX
** Failers
boobarX
/(?<![^f])X/
offX
** Failers
onyX
/(?<=[^f])X/
onyX
** Failers
offX
/^/gm
a\nb\nc\n
\
/(?<=C\n)^/gm
A\nC\nC\n
/(?:(?(1)a|b)(X))+/
bXaX
/(?:(?(1)\1a|b)(X|Y))+/
bXXaYYaY
bXYaXXaX
/()()()()()()()()()(?:(?(10)\10a|b)(X|Y))+/
bXXaYYaY
/[[,abc,]+]/
abc]
a,b]
[a,b,c]
/(?-x: )/x
A\x20B
"(?x)(?-x: \s*#\s*)"
A # B
** Failers
#
"(?x-is)(?:(?-ixs) \s*#\s*) include"
A #include
** Failers
A#include
A #Include
/a*b*\w/
aaabbbb
aaaa
a
/a*b?\w/
aaabbbb
aaaa
a
/a*b{0,4}\w/
aaabbbb
aaaa
a
/a*b{0,}\w/
aaabbbb
aaaa
a
/a*\d*\w/
0a
a
/a*b *\w/x
a
/a*b#comment
*\w/x
a
/a* b *\w/x
a
/^\w+=.*(\\\n.*)*/
abc=xyz\\\npqr
/(?=(\w+))\1:/
abcd:
/^(?=(\w+))\1:/
abcd:
/^\Eabc/
abc
/^[\Eabc]/
a
** Failers
E
/^[a-\Ec]/
b
** Failers
-
E
/^[a\E\E-\Ec]/
b
** Failers
-
E
/^[\E\Qa\E-\Qz\E]+/
b
** Failers
-
/^[a\Q]bc\E]/
a
]
c
/^[a-\Q\E]/
a
-
/^(a()*)*/
aaaa
/^(?:a(?:(?:))*)*/
aaaa
/^(a()+)+/
aaaa
/^(?:a(?:(?:))+)+/
aaaa
/(a){0,3}(?(1)b|(c|))*D/
abbD
ccccD
D
/(a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
/(?>a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
/(?:a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
/\Z/g
abc\n
/^(?s)(?>.*)(?<!\n)/
abc
abc\n
/^(?![^\n]*\n\z)/
abc
abc\n
/\z(?<!\n)/
abc
abc\n
/(.*(.)?)*/
abcd
/( (A | (?(1)0|) )* )/x
abcd
/( ( (?(1)0|) )* )/x
abcd
/( (?(1)0|)* )/x
abcd
/[[:abcd:xyz]]/
a]
:]
/[abc[:x\]pqr]/
a
[
:
]
p
/.*[op][xyz]/
fooabcfoo
/(?(?=.*b)b|^)/
adc
abc
/(?(?=^.*b)b|^)/
adc
abc
/(?(?=.*b)b|^)*/
adc
abc
/(?(?=.*b)b|^)+/
adc
abc
/(?(?=b).*b|^d)/
abc
/(?(?=.*b).*b|^d)/
abc
/^%((?(?=[a])[^%])|b)*%$/
%ab%
/(?i)a(?-i)b|c/
XabX
XAbX
CcC
** Failers
XABX
/[\x00-\xff\s]+/
\x0a\x0b\x0c\x0d
/(abc)\1/i
abc
/(abc)\1/
abc
/[^a]*/i
12abc
12ABC
/[^a]*+/i
12abc
12ABC
/[^a]*?X/i
** Failers
12abc
12ABC
/[^a]+?X/i
** Failers
12abc
12ABC
/[^a]?X/i
12aXbcX
12AXBCX
BCX
/[^a]??X/i
12aXbcX
12AXBCX
BCX
/[^a]?+X/i
12aXbcX
12AXBCX
BCX
/[^a]{2,3}/i
abcdef
ABCDEF
/[^a]{2,3}?/i
abcdef
ABCDEF
/[^a]{2,3}+/i
abcdef
ABCDEF
/((a|)+)+Z/
Z
/(a)b|(a)c/
ac
/(?>(a))b|(a)c/
ac
/(?=(a))ab|(a)c/
ac
/((?>(a))b|(a)c)/
ac
/((?>(a))b|(a)c)++/
ac
/(?:(?>(a))b|(a)c)++/
ac
/(?=(?>(a))b|(a)c)(..)/
ac
/(?>(?>(a))b|(a)c)/
ac
/(?:(?>([ab])))+a=/aftertext
=ba=
/(?>([ab]))+a=/aftertext
=ba=
/((?>(a+)b)+(aabab))/
aaaabaaabaabab
/(?>a+|ab)+?c/
aabc
/(?>a+|ab)+c/
aabc
/(?:a+|ab)+c/
aabc
/(?(?=(a))a)/
a
/(?(?=(a))a)(b)/
ab
/^(?:a|ab)++c/
aaaabc
/^(?>a|ab)++c/
aaaabc
/^(?:a|ab)+c/
aaaabc
/(?=abc){3}abc/aftertext
abcabcabc
** Failers
xyz
/(?=abc)+abc/aftertext
abcabcabc
** Failers
xyz
/(?=abc)++abc/aftertext
abcabcabc
** Failers
xyz
/(?=abc){0}xyz/
xyz
/(?=abc){1}xyz/
** Failers
xyz
/(?=(a))?./
ab
bc
/(?=(a))??./
ab
bc
/^(?=(?1))?[az]([abc])d/
abd
zcdxx
/^(?!a){0}\w+/
aaaaa
/(?<=(abc))?xyz/
abcxyz
pqrxyz
/^[\g<a>]+/
ggg<<<aaa>>>
** Failers
\\ga
/^[\ga]+/
gggagagaxyz
/^[:a[:digit:]]+/
aaaa444:::Z
/^[:a[:digit:]:b]+/
aaaa444:::bbbZ
/[:a]xxx[b:]/
:xxx:
/(?<=a{2})b/i
xaabc
** Failers
xabc
/(?<!a{2})b/i
xabc
** Failers
xaabc
/(?<=a\h)c/
xa c
/(?<=[^a]{2})b/
axxbc
aAAbc
** Failers
xaabc
/(?<=[^a]{2})b/i
axxbc
** Failers
aAAbc
xaabc
/(?<=a\H)c/
abc
/(?<=a\V)c/
abc
/(?<=a\v)c/
a\nc
/(?(?=c)c|d)++Y/
XcccddYX
/(?(?=c)c|d)*+Y/
XcccddYX
/^(a{2,3}){2,}+a/
aaaaaaa
** Failers
aaaaaa
aaaaaaaaa
/^(a{2,3})++a/
** Failers
aaaaaa
/^(a{2,3})*+a/
** Failers
aaaaaa
/ab\Cde/
abXde
/(?<=ab\Cde)X/
abZdeX
/\H\h\V\v/
X X\x0a
X\x09X\x0b
** Failers
\xa0 X\x0a
/\H*\h+\V?\v{3,4}/
\x09\x20\xa0X\x0a\x0b\x0c\x0d\x0a
\x09\x20\xa0\x0a\x0b\x0c\x0d\x0a
\x09\x20\xa0\x0a\x0b\x0c
** Failers
\x09\x20\xa0\x0a\x0b
/\H{3,4}/
XY ABCDE
XY PQR ST
/.\h{3,4}./
XY AB PQRS
/\h*X\h?\H+Y\H?Z/
>XNNNYZ
> X NYQZ
** Failers
>XYZ
> X NY Z
/\v*X\v?Y\v+Z\V*\x0a\V+\x0b\V{2,3}\x0c/
>XY\x0aZ\x0aA\x0bNN\x0c
>\x0a\x0dX\x0aY\x0a\x0bZZZ\x0aAAA\x0bNNN\x0c
/(foo)\Kbar/
foobar
/(foo)(\Kbar|baz)/
foobar
foobaz
/(foo\Kbar)baz/
foobarbaz
/abc\K|def\K/g,aftertext
Xabcdefghi
/ab\Kc|de\Kf/g,aftertext
Xabcdefghi
/(?=C)/g,aftertext
ABCDECBA
/^abc\K/aftertext
abcdef
** Failers
defabcxyz
/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-02}Z/
ababababbbabZXXXX
/(?<A>tom|bon)-\g{A}/
tom-tom
bon-bon
/(^(a|b\g{-1}))/
bacxxx
/(?|(abc)|(xyz))\1/
abcabc
xyzxyz
** Failers
abcxyz
xyzabc
/(?|(abc)|(xyz))(?1)/
abcabc
xyzabc
** Failers
xyzxyz
/^X(?5)(a)(?|(b)|(q))(c)(d)(Y)/
XYabcdY
/^X(?7)(a)(?|(b|(r)(s))|(q))(c)(d)(Y)/
XYabcdY
/^X(?7)(a)(?|(b|(?|(r)|(t))(s))|(q))(c)(d)(Y)/
XYabcdY
/(?'abc'\w+):\k<abc>{2}/
a:aaxyz
ab:ababxyz
** Failers
a:axyz
ab:abxyz
/(?'abc'\w+):\g{abc}{2}/
a:aaxyz
ab:ababxyz
** Failers
a:axyz
ab:abxyz
/^(?<ab>a)? (?(<ab>)b|c) (?('ab')d|e)/x
abd
ce
/^(a.)\g-1Z/
aXaXZ
/^(a.)\g{-1}Z/
aXaXZ
/^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /x
abcd
/(?<NAME>(?&NAME_PAT))\s+(?<ADDR>(?&ADDRESS_PAT))
(?(DEFINE)
(?<NAME_PAT>[a-z]+)
(?<ADDRESS_PAT>\d+)
)/x
metcalfe 33
/(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
1.2.3.4
131.111.10.206
10.0.0.0
** Failers
10.6
455.3.4.5
/\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
1.2.3.4
131.111.10.206
10.0.0.0
** Failers
10.6
455.3.4.5
/^(\w++|\s++)*$/
now is the time for all good men to come to the aid of the party
*** Failers
this is not a line with only words and spaces!
/(\d++)(\w)/
12345a
*** Failers
12345+
/a++b/
aaab
/(a++b)/
aaab
/(a++)b/
aaab
/([^()]++|\([^()]*\))+/
((abc(ade)ufh()()x
/\(([^()]++|\([^()]+\))+\)/
(abc)
(abc(def)xyz)
*** Failers
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/^([^()]|\((?1)*\))*$/
abc
a(b)c
a(b(c))d
*** Failers)
a(b(c)d
/^>abc>([^()]|\((?1)*\))*<xyz<$/
>abc>123<xyz<
>abc>1(2)3<xyz<
>abc>(1(2)3)<xyz<
/^(?:((.)(?1)\2|)|((.)(?3)\4|.))$/i
1221
Satanoscillatemymetallicsonatas
AmanaplanacanalPanama
AblewasIereIsawElba
*** Failers
Thequickbrownfox
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
12
(((2+2)*-3)-7)
-12
*** Failers
((2+2)*-3)-7)
/^(x(y|(?1){2})z)/
xyz
xxyzxyzz
*** Failers
xxyzz
xxyzxyzxyzz
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/x
<>
<abcd>
<abc <123> hij>
<abc <def> hij>
<abc<>def>
<abc<>
*** Failers
<abc
/^a+(*FAIL)/
aaaaaa
/a+b?c+(*FAIL)/
aaabccc
/a+b?(*PRUNE)c+(*FAIL)/
aaabccc
/a+b?(*COMMIT)c+(*FAIL)/
aaabccc
/a+b?(*SKIP)c+(*FAIL)/
aaabcccaaabccc
/^(?:aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
aaaxxxxxx
aaa++++++
bbbxxxxx
bbb+++++
cccxxxx
ccc++++
dddddddd
/^(aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
aaaxxxxxx
aaa++++++
bbbxxxxx
bbb+++++
cccxxxx
ccc++++
dddddddd
/a+b?(*THEN)c+(*FAIL)/
aaabccc
/(A (A|B(*ACCEPT)|C) D)(E)/x
AB
ABX
AADE
ACDE
** Failers
AD
/^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
1221
Satan, oscillate my metallic sonatas!
A man, a plan, a canal: Panama!
Able was I ere I saw Elba.
*** Failers
The quick brown fox
/^((.)(?1)\2|.)$/
a
aba
aabaa
abcdcba
pqaabaaqp
ablewasiereisawelba
rhubarb
the quick brown fox
/(a)(?<=b(?1))/
baz
** Failers
caz
/(?<=b(?1))(a)/
zbaaz
** Failers
aaa
/(?<X>a)(?<=b(?&X))/
baz
/^(?|(abc)|(def))\1/
abcabc
defdef
** Failers
abcdef
defabc
/^(?|(abc)|(def))(?1)/
abcabc
defabc
** Failers
defdef
abcdef
/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |b(?<quote> (?<apostrophe>')|(?<realquote>")) ) (?('quote')[a-z]+|[0-9]+)/x,dupnames
a\"aaaaa
b\"aaaaa
** Failers
b\"11111
/(?:(?1)|B)(A(*F)|C)/
ABCD
CCD
** Failers
CAD
/^(?:(?1)|B)(A(*F)|C)/
CCD
BCD
** Failers
ABCD
CAD
BAD
/(?:(?1)|B)(A(*ACCEPT)XX|C)D/
AAD
ACD
BAD
BCD
BAX
** Failers
ACX
ABC
/(?(DEFINE)(A))B(?1)C/
BAC
/(?(DEFINE)((A)\2))B(?1)C/
BAAC
/(?<pn> \( ( [^()]++ | (?&pn) )* \) )/x
(ab(cd)ef)
/^(?=a(*SKIP)b|ac)/
** Failers
ac
/^(?=a(*PRUNE)b)/
ab
** Failers
ac
/^(?=a(*ACCEPT)b)/
ac
/(?>a\Kb)/
ab
/((?>a\Kb))/
ab
/(a\Kb)/
ab
/^a\Kcz|ac/
ac
/(?>a\Kbz|ab)/
ab
/^(?&t)(?(DEFINE)(?<t>a\Kb))$/
ab
/^([^()]|\((?1)*\))*$/
a(b)c
a(b(c)d)e
/(?P<L1>(?P<L2>0)(?P>L1)|(?P>L2))/
0
00
0000
/(?P<L1>(?P<L2>0)|(?P>L2)(?P>L1))/
0
00
0000
# This one does fail, as expected, in Perl. It needs the complex item at the
# end of the pattern. A single letter instead of (B|D) makes it not fail, which
# I think is a Perl bug.
/A(*COMMIT)(B|D)/
ACABX
# Check the use of names for failure
/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
** Failers
AC
CB
/(*MARK:A)(*SKIP:B)(C|X)/mark
C
D
/^(A(*THEN:A)B|C(*THEN:B)D)/mark
** Failers
CB
/^(?:A(*THEN:A)B|C(*THEN:B)D)/mark
CB
/^(?>A(*THEN:A)B|C(*THEN:B)D)/mark
CB
# This should succeed, as the skip causes bump to offset 1 (the mark). Note
# that we have to have something complicated such as (B|Z) at the end because,
# for Perl, a simple character somehow causes an unwanted optimization to mess
# with the handling of backtracking verbs.
/A(*MARK:A)A+(*SKIP:A)(B|Z) | AC/x,mark
AAAC
# Test skipping over a non-matching mark.
/A(*MARK:A)A+(*MARK:B)(*SKIP:A)(B|Z) | AC/x,mark
AAAC
# Check shorthand for MARK.
/A(*:A)A+(*SKIP:A)(B|Z) | AC/x,mark
AAAC
/(*:A)A+(*SKIP:A)(B|Z)/mark
AAAC
# This should succeed, as a non-existent skip name disables the skip.
/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC/x,mark
AAAC
/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC(*:B)/x,mark
AAAC
# COMMIT at the start of a pattern should act like an anchor. Again, however,
# we need the complication for Perl.
/(*COMMIT)(A|P)(B|P)(C|P)/
ABCDEFG
** Failers
DEFGABC
# COMMIT inside an atomic group can't stop backtracking over the group.
/(\w+)(?>b(*COMMIT))\w{2}/
abbb
/(\w+)b(*COMMIT)\w{2}/
abbb
# Check opening parens in comment when seeking forward reference.
/(?&t)(?#()(?(DEFINE)(?<t>a))/
bac
# COMMIT should override THEN.
/(?>(*COMMIT)(?>yes|no)(*THEN)(*F))?/
yes
/(?>(*COMMIT)(yes|no)(*THEN)(*F))?/
yes
/b?(*SKIP)c/
bc
abc
/(*SKIP)bc/
a
/(*SKIP)b/
a
/(?P<abn>(?P=abn)xxx|)+/
xxx
/(?i:([^b]))(?1)/
aa
aA
** Failers
ab
aB
Ba
ba
/^(?&t)*+(?(DEFINE)(?<t>a))\w$/
aaaaaaX
** Failers
aaaaaa
/^(?&t)*(?(DEFINE)(?<t>a))\w$/
aaaaaaX
aaaaaa
/^(a)*+(\w)/
aaaaX
YZ
** Failers
aaaa
/^(?:a)*+(\w)/
aaaaX
YZ
** Failers
aaaa
/^(a)++(\w)/
aaaaX
** Failers
aaaa
YZ
/^(?:a)++(\w)/
aaaaX
** Failers
aaaa
YZ
/^(a)?+(\w)/
aaaaX
YZ
/^(?:a)?+(\w)/
aaaaX
YZ
/^(a){2,}+(\w)/
aaaaX
** Failers
aaa
YZ
/^(?:a){2,}+(\w)/
aaaaX
** Failers
aaa
YZ
/(a|)*(?1)b/
b
ab
aab
/(a)++(?1)b/
** Failers
ab
aab
/(a)*+(?1)b/
** Failers
ab
aab
/(?1)(?:(b)){0}/
b
/(foo ( \( ((?:(?> [^()]+ )|(?2))*) \) ) )/x
foo(bar(baz)+baz(bop))
/(A (A|B(*ACCEPT)|C) D)(E)/x
AB
/\A.*?(a|bc)/
ba
/\A.*?(?:a|bc)++/
ba
/\A.*?(a|bc)++/
ba
/\A.*?(?:a|bc|d)/
ba
/(?:(b))++/
beetle
/(?(?=(a(*ACCEPT)z))a)/
a
/^(a)(?1)+ab/
aaaab
/^(a)(?1)++ab/
aaaab
/^(?=a(*:M))aZ/mark
aZbc
/^(?!(*:M)b)aZ/mark
aZbc
/(?(DEFINE)(a))?b(?1)/
backgammon
/^\N+/
abc\ndef
/^\N{1,}/
abc\ndef
/(?(R)a+|(?R)b)/
aaaabcde
/(?(R)a+|((?R))b)/
aaaabcde
/((?(R)a+|(?1)b))/
aaaabcde
/((?(R1)a+|(?1)b))/
aaaabcde
/a(*:any
name)/mark
abc
/(?>(?&t)c|(?&t))(?(DEFINE)(?<t>a|b(*PRUNE)c))/
a
ba
bba
# Checking revised (*THEN) handling.
# Capture
/^.*? (a(*THEN)b) c/x
aabc
/^.*? (a(*THEN)b|(*F)) c/x
aabc
/^.*? ( (a(*THEN)b) | (*F) ) c/x
aabc
/^.*? ( (a(*THEN)b) ) c/x
aabc
# Non-capture
/^.*? (?:a(*THEN)b) c/x
aabc
/^.*? (?:a(*THEN)b|(*F)) c/x
aabc
/^.*? (?: (?:a(*THEN)b) | (*F) ) c/x
aabc
/^.*? (?: (?:a(*THEN)b) ) c/x
aabc
# Atomic
/^.*? (?>a(*THEN)b) c/x
aabc
/^.*? (?>a(*THEN)b|(*F)) c/x
aabc
/^.*? (?> (?>a(*THEN)b) | (*F) ) c/x
aabc
/^.*? (?> (?>a(*THEN)b) ) c/x
aabc
# Possessive capture
/^.*? (a(*THEN)b)++ c/x
aabc
/^.*? (a(*THEN)b|(*F))++ c/x
aabc
/^.*? ( (a(*THEN)b)++ | (*F) )++ c/x
aabc
/^.*? ( (a(*THEN)b)++ )++ c/x
aabc
# Possessive non-capture
/^.*? (?:a(*THEN)b)++ c/x
aabc
/^.*? (?:a(*THEN)b|(*F))++ c/x
aabc
/^.*? (?: (?:a(*THEN)b)++ | (*F) )++ c/x
aabc
/^.*? (?: (?:a(*THEN)b)++ )++ c/x
aabc
# Condition assertion
/^(?(?=a(*THEN)b)ab|ac)/
ac
# Condition
/^.*?(?(?=a)a|b(*THEN)c)/
ba
/^.*?(?:(?(?=a)a|b(*THEN)c)|d)/
ba
/^.*?(?(?=a)a(*THEN)b|c)/
ac
# Assertion
/^.*(?=a(*THEN)b)/
aabc
# --------------------------
/(?>a(*:m))/imsx,mark
a
/(?>(a)(*:m))/imsx,mark
a
/(?<=a(*ACCEPT)b)c/
xacd
/(?<=(a(*ACCEPT)b))c/
xacd
/(?<=(a(*COMMIT)b))c/
xabcd
** Failers
xacd
/(?<!a(*FAIL)b)c/
xcd
acd
/(?<=a(*:N)b)c/mark
xabcd
/(?<=a(*PRUNE)b)c/
xabcd
/(?<=a(*SKIP)b)c/
xabcd
/(?<=a(*THEN)b)c/
xabcd
/(a)(?2){2}(.)/
abcd
/(*MARK:A)(*PRUNE:B)(C|X)/mark
C
D
/(*MARK:A)(*PRUNE:B)(C|X)/mark
C
D
/(*MARK:A)(*THEN:B)(C|X)/mark
C
D
/(*MARK:A)(*THEN:B)(C|X)/mark,no_start_optimize
C
D
/(*MARK:A)(*THEN:B)(C|X)/mark
C
D
# This should fail, as the skip causes a bump to offset 3 (the skip).
/A(*MARK:A)A+(*SKIP)(B|Z) | AC/x,mark
AAAC
# Same
/A(*MARK:A)A+(*MARK:B)(*SKIP:B)(B|Z) | AC/x,mark
AAAC
/A(*:A)A+(*SKIP)(B|Z) | AC/x,mark
AAAC
# This should fail, as a null name is the same as no name.
/A(*MARK:A)A+(*SKIP:)(B|Z) | AC/x,mark
AAAC
# A check on what happens after hitting a mark and them bumping along to
# something that does not even start. Perl reports tags after the failures
# here, though it does not when the individual letters are made into something
# more complicated.
/A(*:A)B|XX(*:B)Y/mark
AABC
XXYZ
** Failers
XAQQ
XAQQXZZ
AXQQQ
AXXQQQ
/^(A(*THEN:A)B|C(*THEN:B)D)/mark
AB
CD
** Failers
AC
CB
/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
AB
CD
** Failers
AC
CB
# An empty name does not pass back an empty string. It is the same as if no
# name were given.
/^(A(*PRUNE:)B|C(*PRUNE:B)D)/mark
AB
CD
# PRUNE goes to next bumpalong; COMMIT does not.
/A(*PRUNE:A)B/mark
ACAB
# Mark names can be duplicated.
/A(*:A)B|X(*:A)Y/mark
AABC
XXYZ
/b(*:m)f|a(*:n)w/mark
aw
** Failers
abc
/b(*:m)f|aw/mark
abaw
** Failers
abc
abax
/A(*MARK:A)A+(*SKIP:B)(B|Z) | AAC/x,mark
AAAC
/a(*PRUNE:X)bc|qq/mark,no_start_optimize
** Failers
axy
/a(*THEN:X)bc|qq/mark,no_start_optimize
** Failers
axy
/(?=a(*MARK:A)b)..x/mark
abxy
** Failers
abpq
/(?=a(*MARK:A)b)..(*:Y)x/mark
abxy
** Failers
abpq
/(?=a(*PRUNE:A)b)..x/mark
abxy
** Failers
abpq
/(?=a(*PRUNE:A)b)..(*:Y)x/mark
abxy
** Failers
abpq
/(?=a(*THEN:A)b)..x/mark
abxy
** Failers
abpq
/(?=a(*THEN:A)b)..(*:Y)x/mark
abxy
** Failers
abpq
/(another)?(\1?)test/
hello world test
/(another)?(\1+)test/
hello world test
/(a(*COMMIT)b){0}a(?1)|aac/
aac
/((?:a?)*)*c/
aac
/((?>a?)*)*c/
aac
/(?>.*?a)(?<=ba)/
aba
/(?:.*?a)(?<=ba)/
aba
/.*?a(*PRUNE)b/
aab
/.*?a(*PRUNE)b/s
aab
/^a(*PRUNE)b/s
aab
/.*?a(*SKIP)b/
aab
/(?>.*?a)b/s
aab
/(?>.*?a)b/
aab
/(?>^a)b/s
aab
/(?>.*?)(?<=(abcd)|(wxyz))/
alphabetabcd
endingwxyz
/(?>.*)(?<=(abcd)|(wxyz))/
alphabetabcd
endingwxyz
"(?>.*)foo"
abcdfooxyz
"(?>.*?)foo"
abcdfooxyz
/(?:(a(*PRUNE)b)){0}(?:(?1)|ac)/
ac
/(?:(a(*SKIP)b)){0}(?:(?1)|ac)/
ac
/(?<=(*SKIP)ac)a/
aa
/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC/x,mark
AAAC
/a(*SKIP:m)x|ac(*:n)(*SKIP:n)d|ac/mark
acacd
/A(*SKIP:m)x|A(*SKIP:n)x|AB/mark
AB
/((*SKIP:r)d){0}a(*SKIP:m)x|ac(*:n)|ac/mark
acacd
# Tests that try to figure out how Perl works. My hypothesis is that the first
# verb that is backtracked onto is the one that acts. This seems to be the case
# almost all the time, but there is one exception that is perhaps a bug.
# This matches "aaaac"; each PRUNE advances one character until the subject no
# longer starts with 5 'a's.
/aaaaa(*PRUNE)b|a+c/
aaaaaac
# Putting SKIP in front of PRUNE makes no difference, as it is never
# backtracked onto, whether or not it has a label.
/aaaaa(*SKIP)(*PRUNE)b|a+c/
aaaaaac
/aaaaa(*SKIP:N)(*PRUNE)b|a+c/
aaaaaac
/aaaa(*:N)a(*SKIP:N)(*PRUNE)b|a+c/
aaaaaac
# Putting THEN in front makes no difference.
/aaaaa(*THEN)(*PRUNE)b|a+c/
aaaaaac
# However, putting COMMIT in front of the prune changes it to "no match". I
# think this is inconsistent and possibly a bug. For the moment, running this
# test is moved out of the Perl-compatible file.
/aaaaa(*COMMIT)(*PRUNE)b|a+c/
# OK, lets play the same game again using SKIP instead of PRUNE.
# This matches "ac" because SKIP forces the next match to start on the
# sixth "a".
/aaaaa(*SKIP)b|a+c/
aaaaaac
# Putting PRUNE in front makes no difference.
/aaaaa(*PRUNE)(*SKIP)b|a+c/
aaaaaac
# Putting THEN in front makes no difference.
/aaaaa(*THEN)(*SKIP)b|a+c/
aaaaaac
# In this case, neither does COMMIT. This still matches "ac".
/aaaaa(*COMMIT)(*SKIP)b|a+c/
aaaaaac
# This gives "no match", as expected.
/aaaaa(*COMMIT)b|a+c/
aaaaaac
# ---- Tests using THEN ----
# This matches "aaaaaac", as expected.
/aaaaa(*THEN)b|a+c/
aaaaaac
# Putting SKIP in front makes no difference.
/aaaaa(*SKIP)(*THEN)b|a+c/
aaaaaac
# Putting PRUNE in front makes no difference.
/aaaaa(*PRUNE)(*THEN)b|a+c/
aaaaaac
# Putting COMMIT in front makes no difference.
/aaaaa(*COMMIT)(*THEN)b|a+c/
aaaaaac
# End of "priority" tests
/aaaaa(*:m)(*PRUNE:m)(*SKIP:m)m|a+/
aaaaaa
/aaaaa(*:m)(*MARK:m)(*PRUNE)(*SKIP:m)m|a+/
aaaaaa
/aaaaa(*:n)(*PRUNE:m)(*SKIP:m)m|a+/
aaaaaa
/aaaaa(*:n)(*MARK:m)(*PRUNE)(*SKIP:m)m|a+/
aaaaaa
/a(*MARK:A)aa(*PRUNE:A)a(*SKIP:A)b|a+c/
aaaac
/a(*MARK:A)aa(*MARK:A)a(*SKIP:A)b|a+c/
aaaac
/aaa(*PRUNE:A)a(*SKIP:A)b|a+c/
aaaac
/aaa(*MARK:A)a(*SKIP:A)b|a+c/
aaaac
/a(*:m)a(*COMMIT)(*SKIP:m)b|a+c/mark
aaaaaac
/.?(a|b(*THEN)c)/
ba
/(a(*COMMIT)b)c|abd/
abc
abd
/(?=a(*COMMIT)b)abc|abd/
abc
abd
/(?>a(*COMMIT)b)c|abd/
abc
abd
/a(?=b(*COMMIT)c)[^d]|abd/
abd
abc
/a(?=bc).|abd/
abd
abc
/a(?>b(*COMMIT)c)d|abd/
abceabd
/a(?>bc)d|abd/
abceabd
/(?>a(*COMMIT)b)c|abd/
abd
/(?>a(*COMMIT)c)d|abd/
abd
/((?=a(*COMMIT)b)ab|ac){0}(?:(?1)|a(c))/
ac
# These tests were formerly in test 2, but changes in PCRE and Perl have
# made them compatible.
/^(a)?(?(1)a|b)+$/
*** Failers
a
/(?=a\Kb)ab/
ab
/(?!a\Kb)ac/
ac
/^abc(?<=b\Kc)d/
abcd
/^abc(?<!b\Kq)d/
abcd
/A(*PRUNE:A)A+(*SKIP:A)(B|Z) | AC/x,mark
AAAC
/^((abc|abcx)(*THEN)y|abcd)/
abcd
*** Failers
abcxy
/^((yes|no)(*THEN)(*F))?/
yes
/(A (.*) C? (*THEN) | A D) (*FAIL)/x
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) z/x
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) \s* (*FAIL)/x
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) \s* z/x
AbcdCBefgBhiBqz
/(A (.*) (?:C|) (*THEN) | A D) (*FAIL)/x
AbcdCBefgBhiBqz
/(A (.*) (?:C|) (*THEN) | A D) z/x
AbcdCBefgBhiBqz
/(A (.*) C{0,6} (*THEN) | A D) (*FAIL)/x
AbcdCBefgBhiBqz
/(A (.*) C{0,6} (*THEN) | A D) z/x
AbcdCBefgBhiBqz
/(A (.*) (CE){0,6} (*THEN) | A D) (*FAIL)/x
AbcdCEBefgBhiBqz
/(A (.*) (CE){0,6} (*THEN) | A D) z/x
AbcdCEBefgBhiBqz
/(A (.*) (CE*){0,6} (*THEN) | A D) (*FAIL)/x
AbcdCBefgBhiBqz
/(A (.*) (CE*){0,6} (*THEN) | A D) z/x
AbcdCBefgBhiBqz
/(?=a(*COMMIT)b|ac)ac|ac/
ac
/(?=a(*COMMIT)b|(ac)) ac | (a)c/x
ac
# ----
/(?(?!b(*THEN)a)bn|bnn)/
bnn
/(?!b(*SKIP)a)bn|bnn/
bnn
/(?(?!b(*SKIP)a)bn|bnn)/
bnn
/(?!b(*PRUNE)a)bn|bnn/
bnn
/(?(?!b(*PRUNE)a)bn|bnn)/
bnn
/(?!b(*COMMIT)a)bn|bnn/
bnn
/(?(?!b(*COMMIT)a)bn|bnn)/
bnn
/(?=b(*SKIP)a)bn|bnn/
bnn
/(?=b(*THEN)a)bn|bnn/
bnn
/^(?!a(*SKIP)b)/
ac
/^(?!a(*SKIP)b)../
acd
/(?!a(*SKIP)b)../
acd
/^(?(?!a(*SKIP)b))/
ac
/^(?!a(*PRUNE)b)../
acd
/(?!a(*PRUNE)b)../
acd
/(?!a(*COMMIT)b)ac|cd/
ac
/\A.*?(?:a|bc)/
ba
/^(A(*THEN)B|C(*THEN)D)/
CD
/(*:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
abc
/(*PRUNE:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
abc
/(*SKIP:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
abc
/(*THEN:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
abc
/^\d*\w{4}/
1234
123
/^[^b]*\w{4}/
aaaa
aaa
/^[^b]*\w{4}/i
aaaa
aaa
/^a*\w{4}/
aaaa
aaa
/^a*\w{4}/i
aaaa
aaa
/(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
foofoo
barbar
/(?<n>A)(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
AfooA
AbarA
** Failers
Afoofoo
Abarbar
/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
1 IN SOA non-sp1 non-sp2(
/^ (?:(?<A>A)|(?'B'B)(?<A>A)) (?('A')x) (?(<B>)y)$/x,dupnames
Ax
BAxy
/^A\xZ/
A\0Z
/^A\o{123}B/
A\123B
/ ^ a + + b $ /x
aaaab
/ ^ a + #comment
+ b $ /x
aaaab
/ ^ a + #comment
#comment
+ b $ /x
aaaab
/ ^ (?> a + ) b $ /x
aaaab
/ ^ ( a + ) + + \w $ /x
aaaab
/(?:a\Kb)*+/aftertext
ababc
/(?>a\Kb)*/aftertext
ababc
/(?:a\Kb)*/aftertext
ababc
/(a\Kb)*+/aftertext
ababc
/(a\Kb)*/aftertext
ababc
/(?:x|(?:(xx|yy)+|x|x|x|x|x)|a|a|a)bc/
acb
'\A(?:[^\"]++|\"(?:[^\"]*+|\"\")*+\")++'
NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
'\A(?:[^\"]++|\"(?:[^\"]++|\"\")*+\")++'
NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
'\A(?:[^\"]++|\"(?:[^\"]++|\"\")++\")++'
NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
'\A([^\"1]++|[\"2]([^\"3]*+|[\"4][\"5])*+[\"6])++'
NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
/^\w+(?>\s*)(?<=\w)/
test test
/(?P<same>a)(?P<same>b)/g,dupnames
abbaba
/(?P<same>a)(?P<same>b)(?P=same)/g,dupnames
abbaba
/(?P=same)?(?P<same>a)(?P<same>b)/g,dupnames
abbaba
/(?:(?P=same)?(?:(?P<same>a)|(?P<same>b))(?P=same))+/g,dupnames
bbbaaabaabb
/(?:(?P=same)?(?:(?P=same)(?P<same>a)(?P=same)|(?P=same)?(?P<same>b)(?P=same)){2}(?P=same)(?P<same>c)(?P=same)){2}(?P<same>z)?/g,dupnames
bbbaaaccccaaabbbcc
/(?P<Name>a)?(?P<Name2>b)?(?(<Name>)c|d)*l/
acl
bdl
adl
bcl
/\sabc/
\x{0b}abc
/[\Qa]\E]+/
aa]]
/[\Q]a\E]+/
aa]]
/A((((((((a))))))))\8B/
AaaB
/A(((((((((a)))))))))\9B/
AaaB
/A[\8\9]B/
A8B
A9B
# End of testinput1
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