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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
#newline_default lf any anycrlf
#perltest
/the quick brown fox/
the quick brown fox
What do you know about the quick brown fox?
\= Expect no match
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
\= Expect no match
abxyzpqrrabbxyyyypqAzz
abxyzpqrrrrabbxyyyypqAzz
abxyzpqrrrabxyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
aaaabcxyzzzzpqrrrabbbxyyypqAzz
aaabcxyzpqrrrabbxyyyypqqqqqqqAzz
/^(abc){1,2}zz/
abczz
abcabczz
\= Expect no match
zz
abcabcabczz
>>abczz
/^(b+?|a){1,2}?c/
bc
bbc
bbbc
bac
bbac
aac
abbbbbbbbbbbc
bbbbbbbbbbbac
\= Expect no match
aaac
abbbbbbbbbbbac
/^(b+|a){1,2}c/
bc
bbc
bbbc
bac
bbac
aac
abbbbbbbbbbbc
bbbbbbbbbbbac
\= Expect no match
aaac
abbbbbbbbbbbac
/^(ba|b*){1,2}?bc/
babc
bbabc
bababc
\= Expect no match
bababbc
babababc
/^\ca\cA\c[;\c:/
\x01\x01\e;z
/^[ab\]cde]/
athing
bthing
]thing
cthing
dthing
ething
\= Expect no match
fthing
[thing
\\thing
/^[]cde]/
]thing
cthing
dthing
ething
\= Expect no match
athing
fthing
/^[^ab\]cde]/
fthing
[thing
\\thing
\= Expect no match
athing
bthing
]thing
cthing
dthing
ething
/^[^]cde]/
athing
fthing
\= Expect no match
]thing
cthing
dthing
ething
/^\<5C>/
<20>
/^<5E>/
<20>
/^[0-9]+$/
0
1
2
3
4
5
6
7
8
9
10
100
\= Expect no match
abc
/^.*nter/
enter
inter
uponter
/^xxx[0-9]+$/
xxx0
xxx1234
\= Expect no match
xxx
/^.+[0-9][0-9][0-9]$/
x123
x1234
xx123
123456
\= Expect no match
123
/^.+?[0-9][0-9][0-9]$/
x123
x1234
xx123
123456
\= Expect no match
123
/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
abc!pqr=apquxz.ixr.zzz.ac.uk
\= Expect no match
!pqr=apquxz.ixr.zzz.ac.uk
abc!=apquxz.ixr.zzz.ac.uk
abc!pqr=apquxz:ixr.zzz.ac.uk
abc!pqr=apquxz.ixr.zzz.ac.ukk
/:/
Well, we need a colon: somewhere
\= Expect no match
Fail without a colon
/([\da-f:]+)$/i
0abc
abc
fed
E
::
5f03:12C0::932e
fed def
Any old stuff
\= Expect no match
0zzz
gzzz
fed\x20
Any old rubbish
/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
.1.2.3
A.12.123.0
\= Expect no match
.1.2.3333
1.2.3
1234.2.3
/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
1 IN SOA non-sp1 non-sp2(
1 IN SOA non-sp1 non-sp2 (
\= Expect no match
1IN SOA non-sp1 non-sp2(
/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
a.
Z.
2.
ab-c.pq-r.
sxk.zzz.ac.uk.
x-.y-.
\= Expect no match
-abc.peq.
/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
*.a
*.b0-a
*.c3-b.c
*.c-a.b-c
\= Expect no match
*.0
*.a-
*.a-b.c-
*.c-a.0-c
/^(?=ab(de))(abd)(e)/
abde
/^(?!(ab)de|x)(abd)(f)/
abdf
/^(?=(ab(cd)))(ab)/
abcd
/^[\da-f](\.[\da-f])*$/i
a.b.c.d
A.B.C.D
a.b.c.1.2.3.C
/^\".*\"\s*(;.*)?$/
\"1234\"
\"abcd\" ;
\"\" ; rhubarb
\= Expect no match
\"1234\" : things
/^$/
\
\= Expect no match
A non-empty line
/ ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/x
ab c
\= Expect no match
abc
ab cde
/(?x) ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/
ab c
\= Expect no match
abc
ab cde
/^ a\ b[c ]d $/x
a bcd
a b d
\= Expect no match
abcd
ab d
/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
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__
\= Expect no match
1234567
/^[aeiou\d]{4,5}$/
uoie
1234
12345
aaaaa
\= Expect no match
123456
/^[aeiou\d]{4,5}?/
uoie
1234
12345
aaaaa
123456
/\A(abc|def)=(\1){2,3}\Z/
abc=abcabc
def=defdefdef
\= Expect no match
abc=defdef
/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
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
\= Expect no match
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
\= Expect no match
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
\= Expect no match
abc
/(?=^)abc/
abc
\= Expect no match
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
\= Expect no match
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
\= Expect no match
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
\= Expect no match
A\0Z
A\0\x0\0\x0Z
/^(cow|)\1(bell)/
cowcowbell
bell
\= Expect no match
cowbell
/^\s/
\040abc
\x0cabc
\nabc
\rabc
\tabc
\= Expect no match
abc
/^a b
c/x
abc
/^(a|)\1*b/
ab
aaaab
b
\= Expect no match
acb
/^(a|)\1+b/
aab
aaaab
b
\= Expect no match
ab
/^(a|)\1?b/
ab
aab
b
\= Expect no match
acb
/^(a|)\1{2}b/
aaab
b
\= Expect no match
ab
aab
aaaab
/^(a|)\1{2,3}b/
aaab
aaaab
b
\= Expect no match
ab
aab
aaaaab
/ab{1,3}bc/
abbbbc
abbbc
abbc
\= Expect no match
abc
abbbbbc
/([^.]*)\.([^:]*):[T ]+(.*)/
track1.title:TBlah blah blah
/([^.]*)\.([^:]*):[T ]+(.*)/i
track1.title:TBlah blah blah
/([^.]*)\.([^:]*):[t ]+(.*)/i
track1.title:TBlah blah blah
/^[W-c]+$/
WXY_^abc
\= Expect no match
wxy
/^[W-c]+$/i
WXY_^abc
wxy_^ABC
/^[\x3f-\x5F]+$/i
WXY_^abc
wxy_^ABC
/^abc$/m
abc
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/^abc$/
abc
\= Expect no match
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/\Aabc\Z/m
abc
abc\n
\= Expect no match
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
/\A(.)*\Z/s
abc\ndef
/\A(.)*\Z/m
\= Expect no match
abc\ndef
/(?:b)|(?::+)/
b::c
c::b
/[-az]+/
az-
\= Expect no match
b
/[az-]+/
za-
\= Expect no match
b
/[a\-z]+/
a-z
\= Expect no match
b
/[a-z]+/
abcdxyz
/[\d-]+/
12-34
\= Expect no match
aaa
/\x5c/
\\
/\x20Z/
the Zoo
\= Expect no match
Zulu
/(abc)\1/i
abcabc
ABCabc
abcABC
/abc$/
abc
abc\n
\= Expect no match
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
\= Expect no match
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
\= Expect no match
anything
b\bc
baccd
/[^a]/
Abc
/[^a]/i
Abc
/[^a]+/
AAAaAbc
/[^a]+/i
AAAaAbc
/[^a]+/
bbb\nccc
/[^k]$/
abc
\= Expect no match
abk
/[^k]{2,3}$/
abc
kbc
kabc
\= Expect no match
abk
akb
akk
/^\d{8,}\@.+[^k]$/
12345678\@a.b.c.d
123456789\@x.y.z
\= Expect no match
12345678\@x.y.uk
1234567\@a.b.c.d
/(a)\1{8,}/
aaaaaaaaa
aaaaaaaaaa
\= Expect no match
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
\= Expect no match
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
\= Expect no match
ABC123
/^[W-]46]/
W46]789
-46]789
\= Expect no match
Wall
Zebra
42
[abcd]
]abcd[
/^[W-\]46]/
W46]789
Wall
Zebra
Xylophone
42
[abcd]
]abcd[
\\backslash
\= Expect no match
-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
\= Expect no match
word cat dog elephant mussel cow horse canary baboon snake shark
/word (?:[a-zA-Z0-9]+ ){0,300}otherword/
\= Expect no match
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}/
abc
aab
\= Expect no match
bcd
/^(a){1,2}/
abc
aab
\= Expect no match
bcd
/^(a){1,3}/
abc
aab
aaa
\= Expect no match
bcd
/^(a){1,}/
abc
aab
aaa
aaaaaaaa
\= Expect no match
bcd
/.*\.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
\= Expect no match
abcde\nBar
/(.*X|^B)/m
abcde\n1234Xyz
BarFoo
abcde\nBar
/(.*X|^B)/s
abcde\n1234Xyz
BarFoo
\= Expect no match
abcde\nBar
/(.*X|^B)/ms
abcde\n1234Xyz
BarFoo
abcde\nBar
/(?s)(.*X|^B)/
abcde\n1234Xyz
BarFoo
\= Expect no match
abcde\nBar
/(?s:.*X|^B)/
abcde\n1234Xyz
BarFoo
\= Expect no match
abcde\nBar
/^.*B/
\= Expect no match
abc\nB
/(?s)^.*B/
abc\nB
/(?m)^.*B/
abc\nB
/(?ms)^.*B/
abc\nB
/(?ms)^B/
abc\nB
/(?s)B$/
B\n
/^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]/
123456654321
/^\d\d\d\d\d\d\d\d\d\d\d\d/
123456654321
/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
123456654321
/^[abc]{12}/
abcabcabcabc
/^[a-c]{12}/
abcabcabcabc
/^(a|b|c){12}/
abcabcabcabc
/^[abcdefghijklmnopqrstuvwxy0123456789]/
n
\= Expect no match
z
/abcde{0,0}/
abcd
\= Expect no match
abce
/ab[cd]{0,0}e/
abe
\= Expect no match
abcde
/ab(c){0,0}d/
abd
\= Expect no match
abcd
/a(b*)/
a
ab
abbbb
\= Expect no match
bbbbb
/ab\d{0}e/
abe
\= Expect no match
ab1e
/"([^\\"]+|\\.)*"/
the \"quick\" brown fox
\"the \\\"quick\\\" brown fox\"
/.*?/g,aftertext
abc
/\b/g,aftertext
abc
/\b/g,aftertext
abc
//g
abc
/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
<TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>
/a[^a]b/
acb
a\nb
/a.b/
acb
\= Expect no match
a\nb
/a[^a]b/s
acb
a\nb
/a.b/s
acb
a\nb
/^(b+?|a){1,2}?c/
bac
bbac
bbbac
bbbbac
bbbbbac
/^(b+|a){1,2}?c/
bac
bbac
bbbac
bbbbac
bbbbbac
/(?!\A)x/m
a\bx\n
a\nx\n
\= Expect no match
x\nb\n
/(A|B)*?CD/
CD
/(A|B)*CD/
CD
/(AB)*?\1/
ABABAB
/(AB)*\1/
ABABAB
/(?<!bar)foo/
foo
catfood
arfootle
rfoosh
\= Expect no match
barfoo
towbarfoo
/\w{3}(?<!bar)foo/
catfood
\= Expect no match
foo
barfoo
towbarfoo
/(?<=(foo)a)bar/
fooabar
\= Expect no match
bar
foobbar
/\Aabc\z/m
abc
\= Expect no match
abc\n
qqq\nabc
abc\nzzz
qqq\nabc\nzzz
"(?>.*/)foo"
/this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
\= Expect no match
/this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/
/(?>(\.\d\d[1-9]?))\d+/
1.230003938
1.875000282
\= Expect no match
1.235
/^((?>\w+)|(?>\s+))*$/
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)/
12345a
12345+
/((?>\d+))(\w)/
12345a
\= Expect no match
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)
\= Expect no match
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/a(?-i)b/i
ab
Ab
\= Expect no match
aB
AB
/(a (?x)b c)d e/
a bcd e
\= Expect no match
a b cd e
abcd e
a bcde
/(a b(?x)c d (?-x)e f)/
a bcde f
\= Expect no match
abcdef
/(a(?i)b)c/
abc
aBc
\= Expect no match
abC
aBC
Abc
ABc
ABC
AbC
/a(?i:b)c/
abc
aBc
\= Expect no match
ABC
abC
aBC
/a(?i:b)*c/
aBc
aBBc
\= Expect no match
aBC
aBBC
/a(?=b(?i)c)\w\wd/
abcd
abCd
\= Expect no match
aBCd
abcD
/(?s-i:more.*than).*million/i
more than million
more than MILLION
more \n than Million
\= Expect no match
MORE THAN MILLION
more \n than \n million
/(?:(?s-i)more.*than).*million/i
more than million
more than MILLION
more \n than Million
\= Expect no match
MORE THAN MILLION
more \n than \n million
/(?>a(?i)b+)+c/
abc
aBbc
aBBc
\= Expect no match
Abc
abAb
abbC
/(?=a(?i)b)\w\wc/
abc
aBc
\= Expect no match
Ab
abC
aBC
/(?<=a(?i)b)(\w\w)c/
abxxc
aBxxc
\= Expect no match
Abxxc
ABxxc
abxxC
/(?:(a)|b)(?(1)A|B)/
aA
bB
\= Expect no match
aB
bA
/^(a)?(?(1)a|b)+$/
aa
b
bb
\= Expect no match
ab
# Perl gets this next one wrong if the pattern ends with $; in that case it
# fails to match "12".
/^(?(?=abc)\w{3}:|\d\d)/
abc:
12
123
\= Expect no match
xyz
/^(?(?!abc)\d\d|\w{3}:)$/
abc:
12
\= Expect no match
123
xyz
/(?(?<=foo)bar|cat)/
foobar
cat
fcat
focat
\= Expect no match
foocat
/(?(?<!foo)cat|bar)/
foobar
cat
fcat
focat
\= Expect no match
foocat
/( \( )? [^()]+ (?(1) \) |) /x
abcd
(abcd)
the quick (abcd) fox
(abcd
/( \( )? [^()]+ (?(1) \) ) /x
abcd
(abcd)
the quick (abcd) fox
(abcd
/^(?(2)a|(1)(2))+$/
12
12a
12aa
\= Expect no match
1234
/((?i)blah)\s+\1/
blah blah
BLAH BLAH
Blah Blah
blaH blaH
\= Expect no match
blah BLAH
Blah blah
blaH blah
/((?i)blah)\s+(?i:\1)/
blah blah
BLAH BLAH
Blah Blah
blaH blaH
blah BLAH
Blah blah
blaH blah
/(?>a*)*/
a
aa
aaaa
/(abc|)+/
abc
abcabc
abcabcabc
xyz
/([a]*)*/
a
aaaaa
/([ab]*)*/
a
b
ababab
aaaabcde
bbbb
/([^a]*)*/
b
bbbb
aaa
/([^ab]*)*/
cccc
abab
/([a]*?)*/
a
aaaa
/([ab]*?)*/
a
b
abab
baba
/([^a]*?)*/
b
bbbb
aaa
/([^ab]*?)*/
c
cccc
baba
/(?>a*)*/
a
aaabcde
/((?>a*))*/
aaaaa
aabbaa
/((?>a*?))*/
aaaaa
aabbaa
/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /x
12-sep-98
12-09-98
\= Expect no match
sep-12-98
/(?<=(foo))bar\1/
foobarfoo
foobarfootling
\= Expect no match
foobar
barfoo
/(?i:saturday|sunday)/
saturday
sunday
Saturday
Sunday
SATURDAY
SUNDAY
SunDay
/(a(?i)bc|BB)x/
abcx
aBCx
bbx
BBx
\= Expect no match
abcX
aBCX
bbX
BBX
/^([ab](?i)[cd]|[ef])/
ac
aC
bD
elephant
Europe
frog
France
\= Expect no match
Africa
/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
ab
aBd
xy
xY
zebra
Zambesi
\= Expect no match
aCD
XY
/(?<=foo\n)^bar/m
foo\nbar
\= Expect no match
bar
baz\nbar
/(?<=(?<!foo)bar)baz/
barbaz
barbarbaz
koobarbaz
\= Expect no match
baz
foobarbaz
# The cases of aaaa and aaaaaa are missed out below because Perl does things
# differently. We know that odd, and maybe incorrect, things happen with
# recursive references in Perl, as far as 5.11.3 - see some stuff in test #2.
/^(a\1?){4}$/
aaaaa
aaaaaaa
aaaaaaaaaa
\= Expect no match
a
aa
aaa
aaaaaaaa
aaaaaaaaa
aaaaaaaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaaa
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaa
/^(a\1?)(a\1?)(a\2?)(a\3?)$/
aaaa
aaaaa
aaaaaa
aaaaaaa
aaaaaaaaaa
\= Expect no match
a
aa
aaa
aaaaaaaa
aaaaaaaaa
aaaaaaaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaaa
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaa
# The following tests are taken from the Perl 5.005 test suite; some of them
# are compatible with 5.004, but I'd rather not have to sort them out.
/abc/
abc
xabcy
ababc
\= Expect no match
xbc
axc
abx
/ab*c/
abc
/ab*bc/
abc
abbc
abbbbc
/.{1}/
abbbbc
/.{3,4}/
abbbbc
/ab{0,}bc/
abbbbc
/ab+bc/
abbc
\= Expect no match
abc
abq
/ab{1,}bc/
/ab+bc/
abbbbc
/ab{1,}bc/
abbbbc
/ab{1,3}bc/
abbbbc
/ab{3,4}bc/
abbbbc
/ab{4,5}bc/
\= Expect no match
abq
abbbbc
/ab?bc/
abbc
abc
/ab{0,1}bc/
abc
/ab?bc/
/ab?c/
abc
/ab{0,1}c/
abc
/^abc$/
abc
\= Expect no match
abbbbc
abcc
/^abc/
abcc
/^abc$/
/abc$/
aabc
\= Expect no match
aabcd
/^/
abc
/$/
abc
/a.c/
abc
axc
/a.*c/
axyzc
/a[bc]d/
abd
\= Expect no match
axyzd
abc
/a[b-d]e/
ace
/a[b-d]/
aac
/a[-b]/
a-
/a[b-]/
a-
/a]/
a]
/a[]]b/
a]b
/a[^bc]d/
aed
\= Expect no match
abd
abd
/a[^-b]c/
adc
/a[^]b]c/
adc
a-c
\= Expect no match
a]c
/\ba\b/
a-
-a
-a-
/\by\b/
\= Expect no match
xy
yz
xyz
/\Ba\B/
\= Expect no match
a-
-a
-a-
/\By\b/
xy
/\by\B/
yz
/\By\B/
xyz
/\w/
a
/\W/
-
\= Expect no match
a
/a\sb/
a b
/a\Sb/
a-b
\= Expect no match
a b
/\d/
1
/\D/
-
\= Expect no match
1
/[\w]/
a
/[\W]/
-
\= Expect no match
a
/a[\s]b/
a b
/a[\S]b/
a-b
\= Expect no match
a b
/[\d]/
1
/[\D]/
-
\= Expect no match
1
/ab|cd/
abc
abcd
/()ef/
def
/$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/
\= Expect no match
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/
\= Expect no match
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
\= Expect no match
effg
bcdd
/((((((((((a))))))))))/
a
/((((((((((a))))))))))\10/
aa
/(((((((((a)))))))))/
a
/multiple words of text/
\= Expect no match
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
ab
\= Expect no match
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
\= Expect no match
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
\= Expect no match
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
\= Expect no match
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$/i
ABC
\= Expect no match
ABBBBC
ABCC
/^abc/i
ABCC
/^abc$/i
/abc$/i
AABC
/^/i
ABC
/$/i
ABC
/a.c/i
ABC
AXC
/a.*?c/i
AXYZC
/a.*c/i
AABC
\= Expect no match
AXYZD
/a[bc]d/i
ABD
/a[b-d]e/i
ACE
\= Expect no match
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
\= Expect no match
ABD
A-C
/a[^]b]c/i
ADC
/ab|cd/i
ABC
ABCD
/()ef/i
DEF
/$b/i
\= Expect no match
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])*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
\= Expect no match
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
\= Expect no match
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
\= Expect no match
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
\= Expect no match
AB
aaaaaaaaa
aaaaaaaaaaa
/^(a(?(1)\1)){4}$/
aaaaaaaaaa
\= Expect no match
aaaaaaaaa
aaaaaaaaaaa
/(?:(f)(o)(o)|(b)(a)(r))*/
foobar
/(?<=a)b/
ab
\= Expect no match
cb
b
/(?<!c)b/
ab
b
b
/(?:..)*a/
aba
/(?:..)*?a/
aba
/^(?:b|a(?=(.)))*\1/
abc
/^(){3,5}/
abc
/^(a+)*ax/
aax
/^((a|b)+)*ax/
aax
/^((a|bc)+)*ax/
aax
/(a|x)*ab/
cab
/(a)*ab/
cab
/(?:(?i)a)b/
ab
/((?i)a)b/
ab
/(?:(?i)a)b/
Ab
/((?i)a)b/
Ab
/(?:(?i)a)b/
\= Expect no match
cb
aB
/((?i)a)b/
/(?i:a)b/
ab
/((?i:a))b/
ab
/(?i:a)b/
Ab
/((?i:a))b/
Ab
/(?i:a)b/
\= Expect no match
aB
aB
/((?i:a))b/
/(?:(?-i)a)b/i
ab
/((?-i)a)b/i
ab
/(?:(?-i)a)b/i
aB
/((?-i)a)b/i
aB
/(?:(?-i)a)b/i
aB
\= Expect no match
Ab
AB
/(?-i:a)b/i
ab
/((?-i:a))b/i
ab
/(?-i:a)b/i
aB
/((?-i:a))b/i
aB
/(?-i:a)b/i
\= Expect no match
AB
Ab
/((?-i:a))b/i
/(?-i:a)b/i
aB
/((?-i:a))b/i
aB
/(?-i:a)b/i
\= Expect no match
Ab
AB
/((?-i:a))b/i
/((?-i:a.))b/i
\= Expect no match
AB
a\nB
/((?s-i:a.))b/i
a\nB
/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
cabbbb
/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
/(ab)\d\1/i
Ab4ab
ab4Ab
/foo\w*\d{4}baz/
foobar1234baz
/x(~~)*(?:(?:F)?)?/
x~~
/^a(?#xxx){3}c/
aaac
/^a (?#xxx) (?#yyy) {3}c/x
aaac
/(?<![cd])b/
\= Expect no match
B\nB
dbcb
/(?<![cd])[ab]/
dbaacb
/(?<!(c|d))b/
/(?<!(c|d))[ab]/
dbaacb
/(?<!cd)[ab]/
cdaccb
/^(?:a?b?)*$/
\
a
ab
aaa
\= Expect no match
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/
\= Expect no match
a\nb\nc\n
a\nb\nc\n
/((?m)^b)/
a\nb\nc\n
/(x)?(?(1)a|b)/
\= Expect no match
a
a
/(x)?(?(1)b|a)/
a
/()?(?(1)b|a)/
a
/()(?(1)b|a)/
/()?(?(1)a|b)/
a
/^(\()?blah(?(1)(\)))$/
(blah)
blah
\= Expect no match
a
blah)
(blah
/^(\(+)?blah(?(1)(\)))$/
(blah)
blah
\= Expect no match
blah)
(blah
/(?(?!a)a|b)/
/(?(?!a)b|a)/
a
/(?(?=a)b|a)/
\= Expect no match
a
a
/(?(?=a)a|b)/
a
/(?=(a+?))(\1ab)/
aaab
/^(?=(a+?))\1ab/
/(\w+:)+/
one:
/$(?<=^(a))/
a
/(?=(a+?))(\1ab)/
aaab
/^(?=(a+?))\1ab/
\= Expect no match
aaab
aaab
/([\w:]+::)?(\w+)$/
abcd
xy:z:::abcd
/^[^bcd]*(c+)/
aexycd
/(a*)b+/
caab
/([\w:]+::)?(\w+)$/
abcd
xy:z:::abcd
\= Expect no match
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/
\= Expect no match
aaab
a\nb\n
/b\Z/
a\nb\n
/b\z/
/b\Z/
a\nb
/b\z/
a\nb
/^(?>(?(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
\= Expect no match
\
.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
\= Expect no match
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
\= Expect no match
word cat dog elephant mussel cow horse canary baboon snake shark
/word (?>[a-zA-Z0-9]+ ){0,30}otherword/
\= Expect no match
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
\= Expect no match
123abcfoo
/(?<=(?!...999)\d{3})foo/
999foo
123999foo
\= Expect no match
123abcfoo
/(?<=\d{3}(?!999)...)foo/
123abcfoo
123456foo
\= Expect no match
123999foo
/(?<=\d{3}...)(?<!999)foo/
123abcfoo
123456foo
\= Expect no match
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
/[[: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
\= Expect no match
a\nxb\n
/abc\Qabc\Eabc/
abcabcabc
/abc\Q(*+|\Eabc/
abc(*+|abc
/ abc\Q abc\Eabc/x
abc abcabc
\= Expect no match
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
\= Expect no match
xyzabc
/\Gabc./g
abc1abc2xyzabc3
/abc./g
abc1abc2xyzabc3
/a(?x: b c )d/
XabcdY
\= Expect no match
Xa b c d Y
/((?x)x y z | a b c)/
XabcY
AxyzB
/(?i)AB(?-i)C/
XabCY
\= Expect no match
XabcY
/((?i)AB(?-i)C|D)E/
abCE
DE
\= Expect no match
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
\= Expect no match
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
]
\= Expect no match
b
/(a+)*b/
\= Expect no match
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
\= Expect no match
abcddefg
/(?<![^f]oo)(bar)/
foobarX
\= Expect no match
boobarX
/(?<![^f])X/
offX
\= Expect no match
onyX
/(?<=[^f])X/
onyX
\= Expect no match
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
\= Expect no match
#
"(?x-is)(?:(?-ixs) \s*#\s*) include"
A #include
\= Expect no match
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
\= Expect no match
E
/^[a-\Ec]/
b
\= Expect no match
-
E
/^[a\E\E-\Ec]/
b
\= Expect no match
-
E
/^[\E\Qa\E-\Qz\E]+/
b
\= Expect no match
-
/^[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/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/(?>a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/(?:a|)*\d/
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/\Z/g
abc\n
/^(?s)(?>.*)(?<!\n)/
abc
\= Expect no match
abc\n
/^(?![^\n]*\n\z)/
abc
\= Expect no match
abc\n
/\z(?<!\n)/
abc
\= Expect no match
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]/
\= Expect no match
fooabcfoo
/(?(?=.*b)b|^)/
adc
abc
/(?(?=^.*b)b|^)/
adc
\= Expect no match
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
\= Expect no match
XABX
/[\x00-\xff\s]+/
\x0a\x0b\x0c\x0d
/(abc)\1/i
\= Expect no match
abc
/(abc)\1/
\= Expect no match
abc
/[^a]*/i
12abc
12ABC
/[^a]*+/i
12abc
12ABC
/[^a]*?X/i
\= Expect no match
12abc
12ABC
/[^a]+?X/i
\= Expect no match
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/
\= Expect no match
aabc
/(?>a+|ab)+c/
\= Expect no match
aabc
/(?:a+|ab)+c/
aabc
/(?(?=(a))a)/
a
/(?(?=(a))a)(b)/
ab
/^(?:a|ab)++c/
\= Expect no match
aaaabc
/^(?>a|ab)++c/
\= Expect no match
aaaabc
/^(?:a|ab)+c/
aaaabc
/(?=abc){3}abc/aftertext
abcabcabc
\= Expect no match
xyz
/(?=abc)+abc/aftertext
abcabcabc
\= Expect no match
xyz
/(?=abc)++abc/aftertext
abcabcabc
\= Expect no match
xyz
/(?=abc){0}xyz/
xyz
/(?=abc){1}xyz/
\= Expect no match
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>>>
\= Expect no match
\\ga
/^[\ga]+/
gggagagaxyz
/^[:a[:digit:]]+/
aaaa444:::Z
/^[:a[:digit:]:b]+/
aaaa444:::bbbZ
/[:a]xxx[b:]/
:xxx:
/(?<=a{2})b/i
xaabc
\= Expect no match
xabc
/(?<!a{2})b/i
xabc
\= Expect no match
xaabc
/(?<=a\h)c/
xa c
/(?<=[^a]{2})b/
axxbc
aAAbc
\= Expect no match
xaabc
/(?<=[^a]{2})b/i
axxbc
\= Expect no match
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
\= Expect no match
aaaaaa
aaaaaaaaa
/^(a{2,3})++a/
\= Expect no match
aaaaaa
/^(a{2,3})*+a/
\= Expect no match
aaaaaa
/\H\h\V\v/
X X\x0a
X\x09X\x0b
\= Expect no match
\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
\= Expect no match
\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
\= Expect no match
>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
\= Expect no match
defabcxyz
/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-2}Z/
ababababbbabZXXXX
/(?<A>tom|bon)-\g{A}/
tom-tom
bon-bon
/(^(a|b\g{-1}))/
\= Expect no match
bacxxx
/(?|(abc)|(xyz))\1/
abcabc
xyzxyz
\= Expect no match
abcxyz
xyzabc
/(?|(abc)|(xyz))(?1)/
abcabc
xyzabc
\= Expect no match
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
\= Expect no match
a:axyz
ab:abxyz
/(?'abc'\w+):\g{abc}{2}/
a:aaxyz
ab:ababxyz
\= Expect no match
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
\= Expect no match
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
\= Expect no match
10.6
455.3.4.5
/^(\w++|\s++)*$/
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)/
12345a
\= Expect no match
12345+
/a++b/
aaab
/(a++b)/
aaab
/(a++)b/
aaab
/([^()]++|\([^()]*\))+/
((abc(ade)ufh()()x
/\(([^()]++|\([^()]+\))+\)/
(abc)
(abc(def)xyz)
\= Expect no match
((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
/^([^()]|\((?1)*\))*$/
abc
a(b)c
a(b(c))d
\= Expect no match)
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
\= Expect no match
Thequickbrownfox
/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
12
(((2+2)*-3)-7)
-12
\= Expect no match
((2+2)*-3)-7)
/^(x(y|(?1){2})z)/
xyz
xxyzxyzz
\= Expect no match
xxyzz
xxyzxyzxyzz
/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/x
<>
<abcd>
<abc <123> hij>
<abc <def> hij>
<abc<>def>
<abc<>
\= Expect no match
<abc
/^a+(*FAIL)/
\= Expect no match
aaaaaa
/a+b?c+(*FAIL)/
\= Expect no match
aaabccc
/a+b?(*PRUNE)c+(*FAIL)/
\= Expect no match
aaabccc
/a+b?(*COMMIT)c+(*FAIL)/
\= Expect no match
aaabccc
/a+b?(*SKIP)c+(*FAIL)/
\= Expect no match
aaabcccaaabccc
/^(?:aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
aaaxxxxxx
aaa++++++
bbbxxxxx
bbb+++++
cccxxxx
ccc++++
dddddddd
/^(aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
aaaxxxxxx
aaa++++++
bbbxxxxx
bbb+++++
cccxxxx
ccc++++
dddddddd
/a+b?(*THEN)c+(*FAIL)/
\= Expect no match
aaabccc
/(A (A|B(*ACCEPT)|C) D)(E)/x
AB
ABX
AADE
ACDE
\= Expect no match
AD
/^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
1221
Satan, oscillate my metallic sonatas!
A man, a plan, a canal: Panama!
Able was I ere I saw Elba.
\= Expect no match
The quick brown fox
/^((.)(?1)\2|.)$/
a
aba
aabaa
abcdcba
pqaabaaqp
ablewasiereisawelba
\= Expect no match
rhubarb
the quick brown fox
/(a)(?<=b(?1))/
baz
\= Expect no match
caz
/(?<=b(?1))(a)/
zbaaz
\= Expect no match
aaa
/(?<X>a)(?<=b(?&X))/
baz
/^(?|(abc)|(def))\1/
abcabc
defdef
\= Expect no match
abcdef
defabc
/^(?|(abc)|(def))(?1)/
abcabc
defabc
\= Expect no match
defdef
abcdef
/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |b(?<quote> (?<apostrophe>')|(?<realquote>")) ) (?('quote')[a-z]+|[0-9]+)/x,dupnames
a\"aaaaa
b\"aaaaa
\= Expect no match
b\"11111
/(?:(?1)|B)(A(*F)|C)/
ABCD
CCD
\= Expect no match
CAD
/^(?:(?1)|B)(A(*F)|C)/
CCD
BCD
\= Expect no match
ABCD
CAD
BAD
/(?:(?1)|B)(A(*ACCEPT)XX|C)D/
AAD
ACD
BAD
BCD
BAX
\= Expect no match
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)/
\= Expect no match
ac
/^(?=a(*PRUNE)b)/
ab
\= Expect no match
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)/
\= Expect no match
ACABX
# Check the use of names for failure
/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
\= Expect no match
AC
CB
/(*MARK:A)(*SKIP:B)(C|X)/mark
C
\= Expect no match
D
/^(A(*THEN:A)B|C(*THEN:B)D)/mark
\= Expect no match
CB
/^(?:A(*THEN:A)B|C(*THEN:B)D)/mark
\= Expect no match
CB
/^(?>A(*THEN:A)B|C(*THEN:B)D)/mark
\= Expect no match
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
\= Expect no match
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
\= Expect no match
DEFGABC
# COMMIT inside an atomic group can't stop backtracking over the group.
/(\w+)(?>b(*COMMIT))\w{2}/
abbb
/(\w+)b(*COMMIT)\w{2}/
\= Expect no match
abbb
# Check opening parens in comment when seeking forward reference.
/(?&t)(?#()(?(DEFINE)(?<t>a))/
bac
# COMMIT should override THEN.
/(?>(*COMMIT)(?>yes|no)(*THEN)(*F))?/
\= Expect no match
yes
/(?>(*COMMIT)(yes|no)(*THEN)(*F))?/
\= Expect no match
yes
/b?(*SKIP)c/
bc
abc
/(*SKIP)bc/
\= Expect no match
a
/(*SKIP)b/
\= Expect no match
a
/(?P<abn>(?P=abn)xxx|)+/
xxx
/(?i:([^b]))(?1)/
aa
aA
\= Expect no match
ab
aB
Ba
ba
/^(?&t)*+(?(DEFINE)(?<t>a))\w$/
aaaaaaX
\= Expect no match
aaaaaa
/^(?&t)*(?(DEFINE)(?<t>a))\w$/
aaaaaaX
aaaaaa
/^(a)*+(\w)/
aaaaX
YZ
\= Expect no match
aaaa
/^(?:a)*+(\w)/
aaaaX
YZ
\= Expect no match
aaaa
/^(a)++(\w)/
aaaaX
\= Expect no match
aaaa
YZ
/^(?:a)++(\w)/
aaaaX
\= Expect no match
aaaa
YZ
/^(a)?+(\w)/
aaaaX
YZ
/^(?:a)?+(\w)/
aaaaX
YZ
/^(a){2,}+(\w)/
aaaaX
\= Expect no match
aaa
YZ
/^(?:a){2,}+(\w)/
aaaaX
\= Expect no match
aaa
YZ
/(a|)*(?1)b/
b
ab
aab
/(a)++(?1)b/
\= Expect no match
ab
aab
/(a)*+(?1)b/
\= Expect no match
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/
\= Expect no match
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
/((?(R)a|(?1)))*/
aaa
/((?(R)a|(?1)))+/
aaa
/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
\= Expect no match
aabc
/^.*? (a(*THEN)b|(*F)) c/x
aabc
/^.*? ( (a(*THEN)b) | (*F) ) c/x
aabc
/^.*? ( (a(*THEN)b) ) c/x
\= Expect no match
aabc
# Non-capture
/^.*? (?:a(*THEN)b) c/x
\= Expect no match
aabc
/^.*? (?:a(*THEN)b|(*F)) c/x
aabc
/^.*? (?: (?:a(*THEN)b) | (*F) ) c/x
aabc
/^.*? (?: (?:a(*THEN)b) ) c/x
\= Expect no match
aabc
# Atomic
/^.*? (?>a(*THEN)b) c/x
\= Expect no match
aabc
/^.*? (?>a(*THEN)b|(*F)) c/x
aabc
/^.*? (?> (?>a(*THEN)b) | (*F) ) c/x
aabc
/^.*? (?> (?>a(*THEN)b) ) c/x
\= Expect no match
aabc
# Possessive capture
/^.*? (a(*THEN)b)++ c/x
\= Expect no match
aabc
/^.*? (a(*THEN)b|(*F))++ c/x
aabc
/^.*? ( (a(*THEN)b)++ | (*F) )++ c/x
aabc
/^.*? ( (a(*THEN)b)++ )++ c/x
\= Expect no match
aabc
# Possessive non-capture
/^.*? (?:a(*THEN)b)++ c/x
\= Expect no match
aabc
/^.*? (?:a(*THEN)b|(*F))++ c/x
aabc
/^.*? (?: (?:a(*THEN)b)++ | (*F) )++ c/x
aabc
/^.*? (?: (?:a(*THEN)b)++ )++ c/x
\= Expect no match
aabc
# Condition assertion
/^(?(?=a(*THEN)b)ab|ac)/
ac
# Condition
/^.*?(?(?=a)a|b(*THEN)c)/
\= Expect no match
ba
/^.*?(?:(?(?=a)a|b(*THEN)c)|d)/
ba
/^.*?(?(?=a)a(*THEN)b|c)/
\= Expect no match
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
\= Expect no match
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
\= Expect no match
D
/(*MARK:A)(*PRUNE:B)(C|X)/mark
C
\= Expect no match
D
/(*MARK:A)(*THEN:B)(C|X)/mark
C
\= Expect no match
D
/(*MARK:A)(*THEN:B)(C|X)/mark,no_start_optimize
C
\= Expect no match
D
/(*MARK:A)(*THEN:B)(C|X)/mark
C
\= Expect no match
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
\= Expect no match
AAAC
# Same
/A(*MARK:A)A+(*MARK:B)(*SKIP:B)(B|Z) | AC/x,mark
\= Expect no match
AAAC
/A(*:A)A+(*SKIP)(B|Z) | AC/x,mark
\= Expect no match
AAAC
# This should fail, as a null name is the same as no name.
/A(*MARK:A)A+(*SKIP:)(B|Z) | AC/x,mark
\= Expect no match
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
\= Expect no match
XAQQ
XAQQXZZ
AXQQQ
AXXQQQ
/^(A(*THEN:A)B|C(*THEN:B)D)/mark
AB
CD
\= Expect no match
AC
CB
/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
AB
CD
\= Expect no match
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
\= Expect no match
abc
/b(*:m)f|aw/mark
abaw
\= Expect no match
abc
abax
/A(*MARK:A)A+(*SKIP:B)(B|Z) | AAC/x,mark
AAAC
/(?=a(*MARK:A)b)..x/mark
abxy
\= Expect no match
abpq
/(?=a(*MARK:A)b)..(*:Y)x/mark
abxy
\= Expect no match
abpq
/(?=a(*PRUNE:A)b)..x/mark
abxy
\= Expect no match
abpq
/(?=a(*PRUNE:A)b)..(*:Y)x/mark
abxy
\= Expect no match
abpq
/(?=a(*THEN:A)b)..x/mark
abxy
\= Expect no match
abpq
/(?=a(*THEN:A)b)..(*:Y)x/mark
abxy
\= Expect no match
abpq
/(another)?(\1?)test/
hello world test
/(another)?(\1+)test/
\= Expect no match
hello world test
/(a(*COMMIT)b){0}a(?1)|aac/
aac
/((?:a?)*)*c/
aac
/((?>a?)*)*c/
aac
/(?>.*?a)(?<=ba)/
aba
/(?:.*?a)(?<=ba)/
aba
/(?>.*?a)b/s
aab
/(?>.*?a)b/
aab
/(?>^a)b/s
\= Expect no match
aab
/(?>.*?)(?<=(abcd)|(wxyz))/
alphabetabcd
endingwxyz
/(?>.*)(?<=(abcd)|(wxyz))/
alphabetabcd
endingwxyz
"(?>.*)foo"
\= Expect no match
abcdfooxyz
"(?>.*?)foo"
abcdfooxyz
/(?:(a(*PRUNE)b)){0}(?:(?1)|ac)/
ac
/(?:(a(*SKIP)b)){0}(?:(?1)|ac)/
ac
/(?<=(*SKIP)ac)a/
\= Expect no match
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/
\= Expect no match
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
\= Expect no match
abd
/(?=a(*COMMIT)b)abc|abd/
abc
abd
/(?>a(*COMMIT)b)c|abd/
abc
abd
/a(?=b(*COMMIT)c)[^d]|abd/
abc
\= Expect no match
abd
/a(?=bc).|abd/
abd
abc
/a(?>b(*COMMIT)c)d|abd/
\= Expect no match
abceabd
/a(?>bc)d|abd/
abceabd
/(?>a(*COMMIT)b)c|abd/
abd
/(?>a(*COMMIT)c)d|abd/
\= Expect no match
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)+$/
\= Expect no match
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
\= Expect no match
AAAC
/^((abc|abcx)(*THEN)y|abcd)/
abcd
\= Expect no match
abcxy
/^((yes|no)(*THEN)(*F))?/
\= Expect no match
yes
/(A (.*) C? (*THEN) | A D) (*FAIL)/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) z/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) \s* (*FAIL)/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) C? (*THEN) | A D) \s* z/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) (?:C|) (*THEN) | A D) (*FAIL)/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) (?:C|) (*THEN) | A D) z/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) C{0,6} (*THEN) | A D) (*FAIL)/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) C{0,6} (*THEN) | A D) z/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) (CE){0,6} (*THEN) | A D) (*FAIL)/x
\= Expect no match
AbcdCEBefgBhiBqz
/(A (.*) (CE){0,6} (*THEN) | A D) z/x
\= Expect no match
AbcdCEBefgBhiBqz
/(A (.*) (CE*){0,6} (*THEN) | A D) (*FAIL)/x
\= Expect no match
AbcdCBefgBhiBqz
/(A (.*) (CE*){0,6} (*THEN) | A D) z/x
\= Expect no match
AbcdCBefgBhiBqz
/(?=a(*COMMIT)b|ac)ac|ac/
\= Expect no match
ac
/(?=a(*COMMIT)b|(ac)) ac | (a)c/x
\= Expect no match
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/
\= Expect no match
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
\= Expect no match
123
/^[^b]*\w{4}/
aaaa
\= Expect no match
aaa
/^[^b]*\w{4}/i
aaaa
\= Expect no match
aaa
/^a*\w{4}/
aaaa
\= Expect no match
aaa
/^a*\w{4}/i
aaaa
\= Expect no match
aaa
/(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
foofoo
barbar
/(?<n>A)(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
AfooA
AbarA
\= Expect no match
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/
\= Expect no match
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
\= Expect no match
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
/(|ab)*?d/
abd
xyd
/(?:((abcd))|(((?:(?:(?:(?:abc|(?:abcdef))))b)abcdefghi)abc)|((*ACCEPT)))/
1234abcd
/(\2|a)(\1)/
aaa
/(\2)(\1)/
"Z*(|d*){216}"
"(?1)(?#?'){8}(a)"
baaaaaaaaac
/((((((((((((x))))))))))))\12/
xx
/A[\8]B[\9]C/
A8B9C
/(?1)()((((((\1++))\x85)+)|))/
\x85\x85
"(?|(\k'Pm')|(?'Pm'))"
abcd
/(?|(aaa)|(b))\g{1}/
aaaaaa
bb
/(?|(aaa)|(b))(?1)/
aaaaaa
baaa
\= Expect no match
bb
/(?|(aaa)|(b))/
xaaa
xbc
/(?|(?'a'aaa)|(?'a'b))\k'a'/
aaaaaa
bb
/(?|(?'a'aaa)|(?'a'b))(?'a'cccc)\k'a'/dupnames
aaaccccaaa
bccccb
# /x does not apply to MARK labels
/x (*MARK:ab cd # comment
ef) x/x,mark
axxz
/(?<=a(B){0}c)X/
acX
/(?<DEFINE>b)(?(DEFINE)(a+))(?&DEFINE)/
bbbb
\= Expect no match
baaab
/(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[,;:])(?=.{8,16})(?!.*[\s])/
\ Fred:099
/(?=.*X)X$/
\ X
/(?s)(?=.*?)b/
aabc
/(Z)(a)\2{1,2}?(?-i)\1X/i
ZaAAZX
/(?'c')XX(?'YYYYYYYYYYYYYYYYYYYYYYYCl')/
/[s[:digit:]\E-H]+/
s09-H
/[s[:digit:]\Q\E-H]+/
s09-H
/a+(?:|b)a/
aaaa
/X?(R||){3335}/
/(?1)(A(*COMMIT)|B)D/
ABD
XABD
BAD
ABXABD
\= Expect no match
ABX
/(?(DEFINE)(?<m> 1? (?=(?<cond>2)?) 1 2 (?('cond')|3)))
\A
()
(?&m)
\Z/x
123
/^(?:
(?: A| (1? (?=(?<cond>2)?) (1) 2 (?('cond')|3)) )
(Z)
)+$/x
AZ123Z
\= Expect no match
AZ12Z
/^ (?(DEFINE) ( (?!(a)\2b)..) ) ()(?1) /x
acb
\= Expect no match
aab
'(?>ab|abab){1,5}?M'
abababababababababababM
'(?>ab|abab){2}?M'
abababM
'((?(?=(a))a)+k)'
bbak
'((?(?=(a))a|)+k)'
bbak
'(?(?!(b))a|b)+k'
ababbalbbadabak
/(?!(b))c|b/
Ab
Ac
/(?=(b))b|c/
Ab
Ac
/^(.|(.)(?1)\2)$/
a
aba
abcba
ababa
abcdcba
/^((.)(?1)\2|.?)$/
a
aba
abba
abcba
ababa
abccba
abcdcba
abcddcba
/^(.)(\1|a(?2))/
bab
/^(.|(.)(?1)?\2)$/
abcba
/^(?(?=(a))abc|def)/
abc
/^(?(?!(a))def|abc)/
abc
/^(?(?=(a)(*ACCEPT))abc|def)/
abc
/^(?(?!(a)(*ACCEPT))def|abc)/
abc
/^(?1)\d{3}(a)/
a123a
# This pattern uses a lot of named subpatterns in order to match email
# addresses in various formats. It's a heavy test for named subpatterns. In the
# <atext> group, slash is coded as \x{2f} so that this pattern can also be
# processed by perltest.sh, which does not cater for an escaped delimiter
# within the pattern. $ within the pattern must also be escaped. All $ and @
# characters in subject strings are escaped so that Perl doesn't interpret them
# as variable insertions and " characters must also be escaped for Perl.
# This set of subpatterns is more or less a direct transliteration of the BNF
# definitions in RFC2822, without any of the obsolete features. The addition of
# a possessive + to the definition of <phrase> reduced the match limit in PCRE2
# from over 5 million to just under 400, and eliminated a very noticeable delay
# when this file was passed to perltest.sh.
/(?ix)(?(DEFINE)
(?<addr_spec> (?&local_part) \@ (?&domain) )
(?<angle_addr> (?&CFWS)?+ < (?&addr_spec) > (?&CFWS)?+ )
(?<atext> [a-z\d!#\$%&'*+-\x{2f}=?^_`{|}~] )
(?<atom> (?&CFWS)?+ (?&atext)+ (?&CFWS)?+ )
(?<ccontent> (?&ctext) | (?&quoted_pair) | (?&comment) )
(?<ctext> [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ ()\\] )
(?<comment> \( (?: (?&FWS)?+ (?&ccontent) )*+ (?&FWS)?+ \) )
(?<CFWS> (?: (?&FWS)?+ (?&comment) )* (?# NOT possessive)
(?: (?&FWS)?+ (?&comment) | (?&FWS) ) )
(?<dcontent> (?&dtext) | (?&quoted_pair) )
(?<display_name> (?&phrase) )
(?<domain> (?&dot_atom) | (?&domain_literal) )
(?<domain_literal> (?&CFWS)?+ \[ (?: (?&FWS)?+ (?&dcontent) )* (?&FWS)?+ \]
(?&CFWS)?+ )
(?<dot_atom> (?&CFWS)?+ (?&dot_atom_text) (?&CFWS)?+ )
(?<dot_atom_text> (?&atext)++ (?: \. (?&atext)++)*+ )
(?<dtext> [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ \[\]\\] )
(?<FWS> (?: [\t\ ]*+ \n)?+ [\t\ ]++ )
(?<local_part> (?&dot_atom) | (?&quoted_string) )
(?<mailbox> (?&name_addr) | (?&addr_spec) )
(?<name_addr> (?&display_name)? (?&angle_addr) )
(?<phrase> (?&word)++ )
(?<qcontent> (?&qtext) | (?&quoted_pair) )
(?<quoted_pair> " (?&text) )
(?<quoted_string> (?&CFWS)?+ " (?: (?&FWS)?+ (?&qcontent))* (?&FWS)?+ "
(?&CFWS)?+ )
(?<qtext> [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ "\\] )
(?<text> [^\r\n] )
(?<word> (?&atom) | (?&quoted_string) )
) # End DEFINE
^(?&mailbox)$/
Alan Other <user\@dom.ain>
<user\@dom.ain>
user\@dom.ain
user\@[]
user\@[domain literal]
user\@[domain literal with \"[square brackets\"] inside]
\"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
\= Expect no match
A missing angle <user\@some.where
The quick brown fox
# --------------------------------------------------------------------------
# This pattern uses named groups to match default PCRE2 patterns. It's another
# heavy test for named subpatterns. Once again, code slash as \x{2f} and escape
# $ even in classes so that this works with pcre2test.
/(?sx)(?(DEFINE)
(?<assertion> (?&simple_assertion) | (?&lookaround) )
(?<atomic_group> \( \? > (?&regex) \) )
(?<back_reference> \\ \d+ |
\\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) |
\\k <(?&groupname)> |
\\k '(?&groupname)' |
\\k \{ (?&groupname) \} |
\( \? P= (?&groupname) \) )
(?<branch> (?:(?&assertion) |
(?&callout) |
(?&comment) |
(?&option_setting) |
(?&qualified_item) |
(?&quoted_string) |
(?&quoted_string_empty) |
(?&special_escape) |
(?&verb)
)* )
(?<callout> \(\?C (?: \d+ |
(?: (?<D>["'`^%\#\$])
(?: \k'D'\k'D' | (?!\k'D') . )* \k'D' |
\{ (?: \}\} | [^}]*+ )* \} )
)? \) )
(?<capturing_group> \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )?
(?&regex) \) )
(?<character_class> \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )
(?<character_type> (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )
(?<class_item> (?: \[ : (?:
alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print|
punct|space|upper|word|xdigit
) : \] |
(?&quoted_string) |
(?&quoted_string_empty) |
(?&escaped_character) |
(?&character_type) |
[^]] ) )
(?<comment> \(\?\# [^)]* \) | (?&quoted_string_empty) | \\E )
(?<condition> (?: \( [+-]? \d+ \) |
\( < (?&groupname) > \) |
\( ' (?&groupname) ' \) |
\( R \d* \) |
\( R & (?&groupname) \) |
\( (?&groupname) \) |
\( DEFINE \) |
\( VERSION >?=\d+(?:\.\d\d?)? \) |
(?&callout)?+ (?&comment)* (?&lookaround) ) )
(?<conditional_group> \(\? (?&condition) (?&branch) (?: \| (?&branch) )? \) )
(?<delimited_regex> (?<delimiter> [-\x{2f}!"'`=_:;,%&@~]) (?&regex)
\k'delimiter' .* )
(?<escaped_character> \\ (?: 0[0-7]{1,2} | [0-7]{1,3} | o\{ [0-7]+ \} |
x \{ (*COMMIT) [[:xdigit:]]* \} | x [[:xdigit:]]{0,2} |
[aefnrt] | c[[:print:]] |
[^[:alnum:]] ) )
(?<group> (?&capturing_group) | (?&non_capturing_group) |
(?&resetting_group) | (?&atomic_group) |
(?&conditional_group) )
(?<groupname> [a-zA-Z_]\w* )
(?<literal_character> (?! (?&range_qualifier) ) [^[()|*+?.\$\\] )
(?<lookaround> \(\? (?: = | ! | <= | <! ) (?&regex) \) )
(?<non_capturing_group> \(\? [iJmnsUx-]* : (?&regex) \) )
(?<option_setting> \(\? [iJmnsUx-]* \) )
(?<qualified_item> (?:\. |
(?&lookaround) |
(?&back_reference) |
(?&character_class) |
(?&character_type) |
(?&escaped_character) |
(?&group) |
(?&subroutine_call) |
(?&literal_character) |
(?&quoted_string)
) (?&comment)? (?&qualifier)? )
(?<qualifier> (?: [?*+] | (?&range_qualifier) ) [+?]? )
(?<quoted_string> (?: \\Q (?: (?!\\E | \k'delimiter') . )++ (?: \\E | ) ) )
(?<quoted_string_empty> \\Q\\E )
(?<range_qualifier> \{ (?: \d+ (?: , \d* )? | , \d+ ) \} )
(?<regex> (?&start_item)* (?&branch) (?: \| (?&branch) )* )
(?<resetting_group> \( \? \| (?&regex) \) )
(?<simple_assertion> \^ | \$ | \\A | \\b | \\B | \\G | \\z | \\Z )
(?<special_escape> \\K )
(?<start_item> \( \* (?:
ANY |
ANYCRLF |
BSR_ANYCRLF |
BSR_UNICODE |
CR |
CRLF |
LF |
LIMIT_MATCH=\d+ |
LIMIT_DEPTH=\d+ |
LIMIT_HEAP=\d+ |
NOTEMPTY |
NOTEMPTY_ATSTART |
NO_AUTO_POSSESS |
NO_DOTSTAR_ANCHOR |
NO_JIT |
NO_START_OPT |
NUL |
UTF |
UCP ) \) )
(?<subroutine_call> (?: \(\?R\) | \(\?[+-]?\d+\) |
\(\? (?: & | P> ) (?&groupname) \) |
\\g < (?&groupname) > |
\\g ' (?&groupname) ' |
\\g < [+-]? \d+ > |
\\g ' [+-]? \d+ ) )
(?<verb> \(\* (?: ACCEPT | FAIL | F | COMMIT |
(?:MARK)?:(?&verbname) |
(?:PRUNE|SKIP|THEN) (?: : (?&verbname)? )? ) \) )
(?<verbname> [^)]+ )
) # End DEFINE
# Kick it all off...
^(?&delimited_regex)$/subject_literal,jitstack=256
/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
/(cat(a(ract|tonic)|erpillar)) \1()2(3)/
/^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\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
/<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
/^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /
/(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
/\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
/^(\w++|\s++)*$/
/a+b?(*THEN)c+(*FAIL)/
/(A (A|B(*ACCEPT)|C) D)(E)/x
/^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
/A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
/(?C`a``b`)(?C'a''b')(?C"a""b")(?C^a^^b^)(?C%a%%b%)(?C#a##b#)(?C$a$$b$)(?C{a}}b})/B,callout_info
/(?sx)(?(DEFINE)(?<assertion> (?&simple_assertion) | (?&lookaround) )(?<atomic_group> \( \? > (?&regex) \) )(?<back_reference> \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) )(?<branch> (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?&quoted_string) | (?&quoted_string_empty) | (?&special_escape) | (?&verb) )* )(?<callout> \(\?C (?: \d+ | (?: (?<D>["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) )(?<capturing_group> \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?&regex) \) )(?<character_class> \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )(?<character_type> (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )(?<class_item> (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?&quoted_string) | (?&quoted_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) )(?<comment> \(\?\# [^)]* \) | (?&quoted_string_empty) | \\E )(?<condition> (?: \( [+-]? \d+ \) | \( < (?&groupname) > \) | \( ' (?&groupname) ' \) | \( R \d* \) | \( R & (?&groupname) \) | \( (?&groupname) \) | \( DEFINE \) | \( VERSION >?=\d+(?:\.\d\d?)? \) | (?&callout)?+ (?&comment)* (?&lookaround) ) )(?<conditional_group> \(\? (?&condition) (?&branch) (?: \| (?&branch) )? \) )(?<delimited_regex> (?<delimiter> [-\x{2f}!"'`=_:;,%&@~]) (?&regex) \k'delimiter' .* )(?<escaped_character> \\ (?: 0[0-7]{1,2} | [0-7]{1,3} | o\{ [0-7]+ \} | x \{ (*COMMIT) [[:xdigit:]]* \} | x [[:xdigit:]]{0,2} | [aefnrt] | c[[:print:]] | [^[:alnum:]] ) )(?<group> (?&capturing_group) | (?&non_capturing_group) | (?&resetting_group) | (?&atomic_group) | (?&conditional_group) )(?<groupname> [a-zA-Z_]\w* )(?<literal_character> (?! (?&range_qualifier) ) [^[()|*+?.\$\\] )(?<lookaround> \(\? (?: = | ! | <= | <! ) (?&regex) \) )(?<non_capturing_group> \(\? [iJmnsUx-]* : (?&regex) \) )(?<option_setting> \(\? [iJmnsUx-]* \) )(?<qualified_item> (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?&quoted_string) ) (?&comment)? (?&qualifier)? )(?<qualifier> (?: [?*+] | (?&range_qualifier) ) [+?]? )(?<quoted_string> (?: \\Q (?: (?!\\E | \k'delimiter') . )++ (?: \\E | ) ) ) (?<quoted_string_empty> \\Q\\E ) (?<range_qualifier> \{ (?: \d+ (?: , \d* )? | , \d+ ) \} )(?<regex> (?&start_item)* (?&branch) (?: \| (?&branch) )* )(?<resetting_group> \( \? \| (?&regex) \) )(?<simple_assertion> \^ | \$ | \\A | \\b | \\B | \\G | \\z | \\Z )(?<special_escape> \\K )(?<start_item> \( \* (?: ANY | ANYCRLF | BSR_ANYCRLF | BSR_UNICODE | CR | CRLF | LF | LIMIT_MATCH=\d+ | LIMIT_DEPTH=\d+ | LIMIT_HEAP=\d+ | NOTEMPTY | NOTEMPTY_ATSTART | NO_AUTO_POSSESS | NO_DOTSTAR_ANCHOR | NO_JIT | NO_START_OPT | NUL | UTF | UCP ) \) )(?<subroutine_call> (?: \(\?R\) | \(\?[+-]?\d+\) | \(\? (?: & | P> ) (?&groupname) \) | \\g < (?&groupname) > | \\g ' (?&groupname) ' | \\g < [+-]? \d+ > | \\g ' [+-]? \d+ ) )(?<verb> \(\* (?: ACCEPT | FAIL | F | COMMIT | (?:MARK)?:(?&verbname) | (?:PRUNE|SKIP|THEN) (?: : (?&verbname)? )? ) \) )(?<verbname> [^)]+ ))^(?&delimited_regex)$/
\= Expect no match
/((?(?C'')\QX\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
/(?:(?(2y)a|b)(X))+/
/a(*MARK)b/
/a(*CR)b/
/(?P<abn>(?P=abn)(?<badstufxxx)/
# --------------------------------------------------------------------------
/<(?x:[a b])>/xx
< >
/<(?:[a b])>/xx
< >
/<(?xxx:[a b])>/
< >
/<(?-x:[a b])>/xx
< >
/[[:digit:]-]+/
12-24
/((?<=((*ACCEPT)) )\1?\b) /
\= Expect no match
((?<=((*ACCEPT)) )\\1?\\b)\x20
/((?<=((*ACCEPT))X)\1?Y)\1/
XYYZ
/((?<=((*ACCEPT))X)\1?Y(*ACCEPT))\1/
XYYZ
/(?(DEFINE)(?<optional_a>a?)X)^(?&optional_a)a$/
aa
a
/^(a?)b(?1)a/
abaa
aba
baa
ba
/^(a?)+b(?1)a/
abaa
aba
baa
ba
/^(a?)++b(?1)a/
abaa
aba
baa
ba
/^(a?)+b/
b
ab
aaab
/(?=a+)a(a+)++b/
aab
/(?<=\G.)/g,aftertext
abc
/(?<=(?=.)?)/
/(?<=(?=.)?+)/
/(?<=(?=.)*)/
/(?<=(?=.){4,5})/
/(?<=(?=.){4,5}x)/
/a(?=.(*:X))(*SKIP:X)(*F)|(.)/
abc
/a(?>(*:X))(*SKIP:X)(*F)|(.)/
abc
/a(?:(*:X))(*SKIP:X)(*F)|(.)/
abc
#pattern no_start_optimize
/(?>a(*:1))(?>b(*:1))(*SKIP:1)x|.*/
abc
/(?>a(*:1))(?>b)(*SKIP:1)x|.*/
abc
#subject mark
/a(*ACCEPT:X)b/
abc
/(?=a(*ACCEPT:QQ)bc)axyz/
axyz
/(?(DEFINE)(a(*ACCEPT:X)))(?1)b/
abc
/a(*F:X)b/
abc
/(?(DEFINE)(a(*F:X)))(?1)b/
abc
/a(*COMMIT:X)b/
abc
/(?(DEFINE)(a(*COMMIT:X)))(?1)b/
abc
/a+(*:Z)b(*COMMIT:X)(*SKIP:Z)c|.*/
aaaabd
/a+(*:Z)b(*COMMIT:X)(*SKIP:X)c|.*/
aaaabd
/a(*COMMIT:X)b/
axabc
#pattern -no_start_optimize
#subject -mark
/(.COMMIT)(*COMMIT::::::::::interal error:::)/
/(*COMMIT:<3A><>)/
/(*COMMIT:]w)/
# End of testinput1
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