--- /dev/null
+# 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
+ 0: the quick brown fox
+ What do you know about the quick brown fox?
+ 0: the quick brown fox
+\= Expect no match
+ The quick brown FOX
+No match
+ What do you know about THE QUICK BROWN FOX?
+No match
+
+/The quick brown fox/i
+ the quick brown fox
+ 0: the quick brown fox
+ The quick brown FOX
+ 0: The quick brown FOX
+ What do you know about the quick brown fox?
+ 0: the quick brown fox
+ What do you know about THE QUICK BROWN FOX?
+ 0: THE QUICK BROWN FOX
+
+/abcd\t\n\r\f\a\e\071\x3b\$\\\?caxyz/
+ abcd\t\n\r\f\a\e9;\$\\?caxyz
+ 0: abcd\x09\x0a\x0d\x0c\x07\x1b9;$\?caxyz
+
+/a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz/
+ abxyzpqrrrabbxyyyypqAzz
+ 0: abxyzpqrrrabbxyyyypqAzz
+ abxyzpqrrrabbxyyyypqAzz
+ 0: abxyzpqrrrabbxyyyypqAzz
+ aabxyzpqrrrabbxyyyypqAzz
+ 0: aabxyzpqrrrabbxyyyypqAzz
+ aaabxyzpqrrrabbxyyyypqAzz
+ 0: aaabxyzpqrrrabbxyyyypqAzz
+ aaaabxyzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzpqrrrabbxyyyypqAzz
+ abcxyzpqrrrabbxyyyypqAzz
+ 0: abcxyzpqrrrabbxyyyypqAzz
+ aabcxyzpqrrrabbxyyyypqAzz
+ 0: aabcxyzpqrrrabbxyyyypqAzz
+ aaabcxyzpqrrrabbxyyyypAzz
+ 0: aaabcxyzpqrrrabbxyyyypAzz
+ aaabcxyzpqrrrabbxyyyypqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqAzz
+ aaabcxyzpqrrrabbxyyyypqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqAzz
+ aaabcxyzpqrrrabbxyyyypqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqAzz
+ aaabcxyzpqrrrabbxyyyypqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqAzz
+ aaabcxyzpqrrrabbxyyyypqqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqqAzz
+ aaabcxyzpqrrrabbxyyyypqqqqqqAzz
+ 0: aaabcxyzpqrrrabbxyyyypqqqqqqAzz
+ aaaabcxyzpqrrrabbxyyyypqAzz
+ 0: aaaabcxyzpqrrrabbxyyyypqAzz
+ abxyzzpqrrrabbxyyyypqAzz
+ 0: abxyzzpqrrrabbxyyyypqAzz
+ aabxyzzzpqrrrabbxyyyypqAzz
+ 0: aabxyzzzpqrrrabbxyyyypqAzz
+ aaabxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaabxyzzzzpqrrrabbxyyyypqAzz
+ aaaabxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzzzzpqrrrabbxyyyypqAzz
+ abcxyzzpqrrrabbxyyyypqAzz
+ 0: abcxyzzpqrrrabbxyyyypqAzz
+ aabcxyzzzpqrrrabbxyyyypqAzz
+ 0: aabcxyzzzpqrrrabbxyyyypqAzz
+ aaabcxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaabcxyzzzzpqrrrabbxyyyypqAzz
+ aaaabcxyzzzzpqrrrabbxyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbxyyyypqAzz
+ aaaabcxyzzzzpqrrrabbbxyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbbxyyyypqAzz
+ aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
+ 0: aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
+ aaabcxyzpqrrrabbxyyyypABzz
+ 0: aaabcxyzpqrrrabbxyyyypABzz
+ aaabcxyzpqrrrabbxyyyypABBzz
+ 0: aaabcxyzpqrrrabbxyyyypABBzz
+ >>>aaabxyzpqrrrabbxyyyypqAzz
+ 0: aaabxyzpqrrrabbxyyyypqAzz
+ >aaaabxyzpqrrrabbxyyyypqAzz
+ 0: aaaabxyzpqrrrabbxyyyypqAzz
+ >>>>abcxyzpqrrrabbxyyyypqAzz
+ 0: abcxyzpqrrrabbxyyyypqAzz
+\= Expect no match
+ abxyzpqrrabbxyyyypqAzz
+No match
+ abxyzpqrrrrabbxyyyypqAzz
+No match
+ abxyzpqrrrabxyyyypqAzz
+No match
+ aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
+No match
+ aaaabcxyzzzzpqrrrabbbxyyypqAzz
+No match
+ aaabcxyzpqrrrabbxyyyypqqqqqqqAzz
+No match
+
+/^(abc){1,2}zz/
+ abczz
+ 0: abczz
+ 1: abc
+ abcabczz
+ 0: abcabczz
+ 1: abc
+\= Expect no match
+ zz
+No match
+ abcabcabczz
+No match
+ >>abczz
+No match
+
+/^(b+?|a){1,2}?c/
+ bc
+ 0: bc
+ 1: b
+ bbc
+ 0: bbc
+ 1: b
+ bbbc
+ 0: bbbc
+ 1: bb
+ bac
+ 0: bac
+ 1: a
+ bbac
+ 0: bbac
+ 1: a
+ aac
+ 0: aac
+ 1: a
+ abbbbbbbbbbbc
+ 0: abbbbbbbbbbbc
+ 1: bbbbbbbbbbb
+ bbbbbbbbbbbac
+ 0: bbbbbbbbbbbac
+ 1: a
+\= Expect no match
+ aaac
+No match
+ abbbbbbbbbbbac
+No match
+
+/^(b+|a){1,2}c/
+ bc
+ 0: bc
+ 1: b
+ bbc
+ 0: bbc
+ 1: bb
+ bbbc
+ 0: bbbc
+ 1: bbb
+ bac
+ 0: bac
+ 1: a
+ bbac
+ 0: bbac
+ 1: a
+ aac
+ 0: aac
+ 1: a
+ abbbbbbbbbbbc
+ 0: abbbbbbbbbbbc
+ 1: bbbbbbbbbbb
+ bbbbbbbbbbbac
+ 0: bbbbbbbbbbbac
+ 1: a
+\= Expect no match
+ aaac
+No match
+ abbbbbbbbbbbac
+No match
+
+/^(ba|b*){1,2}?bc/
+ babc
+ 0: babc
+ 1: ba
+ bbabc
+ 0: bbabc
+ 1: ba
+ bababc
+ 0: bababc
+ 1: ba
+\= Expect no match
+ bababbc
+No match
+ babababc
+No match
+
+/^\ca\cA\c[;\c:/
+ \x01\x01\e;z
+ 0: \x01\x01\x1b;z
+
+/^[ab\]cde]/
+ athing
+ 0: a
+ bthing
+ 0: b
+ ]thing
+ 0: ]
+ cthing
+ 0: c
+ dthing
+ 0: d
+ ething
+ 0: e
+\= Expect no match
+ fthing
+No match
+ [thing
+No match
+ \\thing
+No match
+
+/^[]cde]/
+ ]thing
+ 0: ]
+ cthing
+ 0: c
+ dthing
+ 0: d
+ ething
+ 0: e
+\= Expect no match
+ athing
+No match
+ fthing
+No match
+
+/^[^ab\]cde]/
+ fthing
+ 0: f
+ [thing
+ 0: [
+ \\thing
+ 0: \
+\= Expect no match
+ athing
+No match
+ bthing
+No match
+ ]thing
+No match
+ cthing
+No match
+ dthing
+No match
+ ething
+No match
+
+/^[^]cde]/
+ athing
+ 0: a
+ fthing
+ 0: f
+\= Expect no match
+ ]thing
+No match
+ cthing
+No match
+ dthing
+No match
+ ething
+No match
+
+/^\\81/
+ \81
+ 0: \x81
+
+/^ÿ/
+ ÿ
+ 0: \xff
+
+/^[0-9]+$/
+ 0
+ 0: 0
+ 1
+ 0: 1
+ 2
+ 0: 2
+ 3
+ 0: 3
+ 4
+ 0: 4
+ 5
+ 0: 5
+ 6
+ 0: 6
+ 7
+ 0: 7
+ 8
+ 0: 8
+ 9
+ 0: 9
+ 10
+ 0: 10
+ 100
+ 0: 100
+\= Expect no match
+ abc
+No match
+
+/^.*nter/
+ enter
+ 0: enter
+ inter
+ 0: inter
+ uponter
+ 0: uponter
+
+/^xxx[0-9]+$/
+ xxx0
+ 0: xxx0
+ xxx1234
+ 0: xxx1234
+\= Expect no match
+ xxx
+No match
+
+/^.+[0-9][0-9][0-9]$/
+ x123
+ 0: x123
+ x1234
+ 0: x1234
+ xx123
+ 0: xx123
+ 123456
+ 0: 123456
+\= Expect no match
+ 123
+No match
+
+/^.+?[0-9][0-9][0-9]$/
+ x123
+ 0: x123
+ x1234
+ 0: x1234
+ xx123
+ 0: xx123
+ 123456
+ 0: 123456
+\= Expect no match
+ 123
+No match
+
+/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
+ abc!pqr=apquxz.ixr.zzz.ac.uk
+ 0: abc!pqr=apquxz.ixr.zzz.ac.uk
+ 1: abc
+ 2: pqr
+\= Expect no match
+ !pqr=apquxz.ixr.zzz.ac.uk
+No match
+ abc!=apquxz.ixr.zzz.ac.uk
+No match
+ abc!pqr=apquxz:ixr.zzz.ac.uk
+No match
+ abc!pqr=apquxz.ixr.zzz.ac.ukk
+No match
+
+/:/
+ Well, we need a colon: somewhere
+ 0: :
+\= Expect no match
+ Fail without a colon
+No match
+
+/([\da-f:]+)$/i
+ 0abc
+ 0: 0abc
+ 1: 0abc
+ abc
+ 0: abc
+ 1: abc
+ fed
+ 0: fed
+ 1: fed
+ E
+ 0: E
+ 1: E
+ ::
+ 0: ::
+ 1: ::
+ 5f03:12C0::932e
+ 0: 5f03:12C0::932e
+ 1: 5f03:12C0::932e
+ fed def
+ 0: def
+ 1: def
+ Any old stuff
+ 0: ff
+ 1: ff
+\= Expect no match
+ 0zzz
+No match
+ gzzz
+No match
+ fed\x20
+No match
+ Any old rubbish
+No match
+
+/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
+ .1.2.3
+ 0: .1.2.3
+ 1: 1
+ 2: 2
+ 3: 3
+ A.12.123.0
+ 0: A.12.123.0
+ 1: 12
+ 2: 123
+ 3: 0
+\= Expect no match
+ .1.2.3333
+No match
+ 1.2.3
+No match
+ 1234.2.3
+No match
+
+/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
+ 1 IN SOA non-sp1 non-sp2(
+ 0: 1 IN SOA non-sp1 non-sp2(
+ 1: 1
+ 2: non-sp1
+ 3: non-sp2
+ 1 IN SOA non-sp1 non-sp2 (
+ 0: 1 IN SOA non-sp1 non-sp2 (
+ 1: 1
+ 2: non-sp1
+ 3: non-sp2
+\= Expect no match
+ 1IN SOA non-sp1 non-sp2(
+No match
+
+/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
+ a.
+ 0: a.
+ Z.
+ 0: Z.
+ 2.
+ 0: 2.
+ ab-c.pq-r.
+ 0: ab-c.pq-r.
+ 1: .pq-r
+ sxk.zzz.ac.uk.
+ 0: sxk.zzz.ac.uk.
+ 1: .uk
+ x-.y-.
+ 0: x-.y-.
+ 1: .y-
+\= Expect no match
+ -abc.peq.
+No match
+
+/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
+ *.a
+ 0: *.a
+ *.b0-a
+ 0: *.b0-a
+ 1: 0-a
+ *.c3-b.c
+ 0: *.c3-b.c
+ 1: 3-b
+ 2: .c
+ *.c-a.b-c
+ 0: *.c-a.b-c
+ 1: -a
+ 2: .b-c
+ 3: -c
+\= Expect no match
+ *.0
+No match
+ *.a-
+No match
+ *.a-b.c-
+No match
+ *.c-a.0-c
+No match
+
+/^(?=ab(de))(abd)(e)/
+ abde
+ 0: abde
+ 1: de
+ 2: abd
+ 3: e
+
+/^(?!(ab)de|x)(abd)(f)/
+ abdf
+ 0: abdf
+ 1: <unset>
+ 2: abd
+ 3: f
+
+/^(?=(ab(cd)))(ab)/
+ abcd
+ 0: ab
+ 1: abcd
+ 2: cd
+ 3: ab
+
+/^[\da-f](\.[\da-f])*$/i
+ a.b.c.d
+ 0: a.b.c.d
+ 1: .d
+ A.B.C.D
+ 0: A.B.C.D
+ 1: .D
+ a.b.c.1.2.3.C
+ 0: a.b.c.1.2.3.C
+ 1: .C
+
+/^\".*\"\s*(;.*)?$/
+ \"1234\"
+ 0: "1234"
+ \"abcd\" ;
+ 0: "abcd" ;
+ 1: ;
+ \"\" ; rhubarb
+ 0: "" ; rhubarb
+ 1: ; rhubarb
+\= Expect no match
+ \"1234\" : things
+No match
+
+/^$/
+ \
+ 0:
+\= Expect no match
+ A non-empty line
+No match
+
+/ ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/x
+ ab c
+ 0: ab c
+\= Expect no match
+ abc
+No match
+ ab cde
+No match
+
+/(?x) ^ a (?# begins with a) b\sc (?# then b c) $ (?# then end)/
+ ab c
+ 0: ab c
+\= Expect no match
+ abc
+No match
+ ab cde
+No match
+
+/^ a\ b[c ]d $/x
+ a bcd
+ 0: a bcd
+ a b d
+ 0: a b d
+\= Expect no match
+ abcd
+No match
+ ab d
+No match
+
+/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
+ abcdefhijklm
+ 0: abcdefhijklm
+ 1: abc
+ 2: bc
+ 3: c
+ 4: def
+ 5: ef
+ 6: f
+ 7: hij
+ 8: ij
+ 9: j
+10: klm
+11: lm
+12: m
+
+/^(?:a(b(c)))(?:d(e(f)))(?:h(i(j)))(?:k(l(m)))$/
+ abcdefhijklm
+ 0: abcdefhijklm
+ 1: bc
+ 2: c
+ 3: ef
+ 4: f
+ 5: ij
+ 6: j
+ 7: lm
+ 8: m
+
+/^[\w][\W][\s][\S][\d][\D][\b][\n][\c]][\022]/
+ a+ Z0+\x08\n\x1d\x12
+ 0: a+ Z0+\x08\x0a\x1d\x12
+
+/^[.^$|()*+?{,}]+/
+ .^\$(*+)|{?,?}
+ 0: .^$(*+)|{?,?}
+
+/^a*\w/
+ z
+ 0: z
+ az
+ 0: az
+ aaaz
+ 0: aaaz
+ a
+ 0: a
+ aa
+ 0: aa
+ aaaa
+ 0: aaaa
+ a+
+ 0: a
+ aa+
+ 0: aa
+
+/^a*?\w/
+ z
+ 0: z
+ az
+ 0: a
+ aaaz
+ 0: a
+ a
+ 0: a
+ aa
+ 0: a
+ aaaa
+ 0: a
+ a+
+ 0: a
+ aa+
+ 0: a
+
+/^a+\w/
+ az
+ 0: az
+ aaaz
+ 0: aaaz
+ aa
+ 0: aa
+ aaaa
+ 0: aaaa
+ aa+
+ 0: aa
+
+/^a+?\w/
+ az
+ 0: az
+ aaaz
+ 0: aa
+ aa
+ 0: aa
+ aaaa
+ 0: aa
+ aa+
+ 0: aa
+
+/^\d{8}\w{2,}/
+ 1234567890
+ 0: 1234567890
+ 12345678ab
+ 0: 12345678ab
+ 12345678__
+ 0: 12345678__
+\= Expect no match
+ 1234567
+No match
+
+/^[aeiou\d]{4,5}$/
+ uoie
+ 0: uoie
+ 1234
+ 0: 1234
+ 12345
+ 0: 12345
+ aaaaa
+ 0: aaaaa
+\= Expect no match
+ 123456
+No match
+
+/^[aeiou\d]{4,5}?/
+ uoie
+ 0: uoie
+ 1234
+ 0: 1234
+ 12345
+ 0: 1234
+ aaaaa
+ 0: aaaa
+ 123456
+ 0: 1234
+
+/\A(abc|def)=(\1){2,3}\Z/
+ abc=abcabc
+ 0: abc=abcabc
+ 1: abc
+ 2: abc
+ def=defdefdef
+ 0: def=defdefdef
+ 1: def
+ 2: def
+\= Expect no match
+ abc=defdef
+No match
+
+/^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
+ abcdefghijkcda2
+ 0: abcdefghijkcda2
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: cd
+ abcdefghijkkkkcda2
+ 0: abcdefghijkkkkcda2
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: cd
+
+/(cat(a(ract|tonic)|erpillar)) \1()2(3)/
+ cataract cataract23
+ 0: cataract cataract23
+ 1: cataract
+ 2: aract
+ 3: ract
+ 4:
+ 5: 3
+ catatonic catatonic23
+ 0: catatonic catatonic23
+ 1: catatonic
+ 2: atonic
+ 3: tonic
+ 4:
+ 5: 3
+ caterpillar caterpillar23
+ 0: caterpillar caterpillar23
+ 1: caterpillar
+ 2: erpillar
+ 3: <unset>
+ 4:
+ 5: 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 abcd Mon Sep 01 12:33:02 1997
+ 0: From abcd Mon Sep 01 12:33
+ 1: abcd
+
+/^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
+ 0: From abcd Mon Sep 01 12:33
+ 1: Sep
+ From abcd Mon Sep 1 12:33:02 1997
+ 0: From abcd Mon Sep 1 12:33
+ 1: Sep
+\= Expect no match
+ From abcd Sep 01 12:33:02 1997
+No match
+
+/^12.34/s
+ 12\n34
+ 0: 12\x0a34
+ 12\r34
+ 0: 12\x0d34
+
+/\w+(?=\t)/
+ the quick brown\t fox
+ 0: brown
+
+/foo(?!bar)(.*)/
+ foobar is foolish see?
+ 0: foolish see?
+ 1: lish see?
+
+/(?:(?!foo)...|^.{0,2})bar(.*)/
+ foobar crowbar etc
+ 0: rowbar etc
+ 1: etc
+ barrel
+ 0: barrel
+ 1: rel
+ 2barrel
+ 0: 2barrel
+ 1: rel
+ A barrel
+ 0: A barrel
+ 1: rel
+
+/^(\D*)(?=\d)(?!123)/
+ abc456
+ 0: abc
+ 1: abc
+\= Expect no match
+ abc123
+No match
+
+/^1234(?# test newlines
+ inside)/
+ 1234
+ 0: 1234
+
+/^1234 #comment in extended re
+ /x
+ 1234
+ 0: 1234
+
+/#rhubarb
+ abcd/x
+ abcd
+ 0: abcd
+
+/^abcd#rhubarb/x
+ abcd
+ 0: abcd
+
+/^(a)\1{2,3}(.)/
+ aaab
+ 0: aaab
+ 1: a
+ 2: b
+ aaaab
+ 0: aaaab
+ 1: a
+ 2: b
+ aaaaab
+ 0: aaaaa
+ 1: a
+ 2: a
+ aaaaaab
+ 0: aaaaa
+ 1: a
+ 2: a
+
+/(?!^)abc/
+ the abc
+ 0: abc
+\= Expect no match
+ abc
+No match
+
+/(?=^)abc/
+ abc
+ 0: abc
+\= Expect no match
+ the abc
+No match
+
+/^[ab]{1,3}(ab*|b)/
+ aabbbbb
+ 0: aabb
+ 1: b
+
+/^[ab]{1,3}?(ab*|b)/
+ aabbbbb
+ 0: aabbbbb
+ 1: abbbbb
+
+/^[ab]{1,3}?(ab*?|b)/
+ aabbbbb
+ 0: aa
+ 1: a
+
+/^[ab]{1,3}(ab*?|b)/
+ aabbbbb
+ 0: aabb
+ 1: b
+
+/ (?: [\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>
+ 0: Alan Other <user@dom.ain>
+ <user\@dom.ain>
+ 0: user@dom.ain
+ user\@dom.ain
+ 0: user@dom.ain
+ \"A. Other\" <user.1234\@dom.ain> (a comment)
+ 0: "A. Other" <user.1234@dom.ain> (a comment)
+ A. Other <user.1234\@dom.ain> (a comment)
+ 0: Other <user.1234@dom.ain> (a comment)
+ \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+ 0: "/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/"@x400-re.lay
+ A missing angle <user\@some.where
+ 0: user@some.where
+\= Expect no match
+ The quick brown fox
+No match
+
+/[\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>
+ 0: Alan Other <user@dom.ain>
+ <user\@dom.ain>
+ 0: user@dom.ain
+ user\@dom.ain
+ 0: user@dom.ain
+ \"A. Other\" <user.1234\@dom.ain> (a comment)
+ 0: "A. Other" <user.1234@dom.ain>
+ A. Other <user.1234\@dom.ain> (a comment)
+ 0: Other <user.1234@dom.ain>
+ \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+ 0: "/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/"@x400-re.lay
+ A missing angle <user\@some.where
+ 0: user@some.where
+\= Expect no match
+ The quick brown fox
+No match
+
+/abc\0def\00pqr\000xyz\0000AB/
+ abc\0def\00pqr\000xyz\0000AB
+ 0: abc\x00def\x00pqr\x00xyz\x000AB
+ abc456 abc\0def\00pqr\000xyz\0000ABCDE
+ 0: abc\x00def\x00pqr\x00xyz\x000AB
+
+/abc\x0def\x00pqr\x000xyz\x0000AB/
+ abc\x0def\x00pqr\x000xyz\x0000AB
+ 0: abc\x0def\x00pqr\x000xyz\x0000AB
+ abc456 abc\x0def\x00pqr\x000xyz\x0000ABCDE
+ 0: abc\x0def\x00pqr\x000xyz\x0000AB
+
+/^[\000-\037]/
+ \0A
+ 0: \x00
+ \01B
+ 0: \x01
+ \037C
+ 0: \x1f
+
+/\0*/
+ \0\0\0\0
+ 0: \x00\x00\x00\x00
+
+/A\x0{2,3}Z/
+ The A\x0\x0Z
+ 0: A\x00\x00Z
+ An A\0\x0\0Z
+ 0: A\x00\x00\x00Z
+\= Expect no match
+ A\0Z
+No match
+ A\0\x0\0\x0Z
+No match
+
+/^(cow|)\1(bell)/
+ cowcowbell
+ 0: cowcowbell
+ 1: cow
+ 2: bell
+ bell
+ 0: bell
+ 1:
+ 2: bell
+\= Expect no match
+ cowbell
+No match
+
+/^\s/
+ \040abc
+ 0:
+ \x0cabc
+ 0: \x0c
+ \nabc
+ 0: \x0a
+ \rabc
+ 0: \x0d
+ \tabc
+ 0: \x09
+\= Expect no match
+ abc
+No match
+
+/^a b
+ \f c/x
+ abc
+ 0: abc
+
+/^(a|)\1*b/
+ ab
+ 0: ab
+ 1: a
+ aaaab
+ 0: aaaab
+ 1: a
+ b
+ 0: b
+ 1:
+\= Expect no match
+ acb
+No match
+
+/^(a|)\1+b/
+ aab
+ 0: aab
+ 1: a
+ aaaab
+ 0: aaaab
+ 1: a
+ b
+ 0: b
+ 1:
+\= Expect no match
+ ab
+No match
+
+/^(a|)\1?b/
+ ab
+ 0: ab
+ 1: a
+ aab
+ 0: aab
+ 1: a
+ b
+ 0: b
+ 1:
+\= Expect no match
+ acb
+No match
+
+/^(a|)\1{2}b/
+ aaab
+ 0: aaab
+ 1: a
+ b
+ 0: b
+ 1:
+\= Expect no match
+ ab
+No match
+ aab
+No match
+ aaaab
+No match
+
+/^(a|)\1{2,3}b/
+ aaab
+ 0: aaab
+ 1: a
+ aaaab
+ 0: aaaab
+ 1: a
+ b
+ 0: b
+ 1:
+\= Expect no match
+ ab
+No match
+ aab
+No match
+ aaaaab
+No match
+
+/ab{1,3}bc/
+ abbbbc
+ 0: abbbbc
+ abbbc
+ 0: abbbc
+ abbc
+ 0: abbc
+\= Expect no match
+ abc
+No match
+ abbbbbc
+No match
+
+/([^.]*)\.([^:]*):[T ]+(.*)/
+ track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/([^.]*)\.([^:]*):[T ]+(.*)/i
+ track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/([^.]*)\.([^:]*):[t ]+(.*)/i
+ track1.title:TBlah blah blah
+ 0: track1.title:TBlah blah blah
+ 1: track1
+ 2: title
+ 3: Blah blah blah
+
+/^[W-c]+$/
+ WXY_^abc
+ 0: WXY_^abc
+\= Expect no match
+ wxy
+No match
+
+/^[W-c]+$/i
+ WXY_^abc
+ 0: WXY_^abc
+ wxy_^ABC
+ 0: wxy_^ABC
+
+/^[\x3f-\x5F]+$/i
+ WXY_^abc
+ 0: WXY_^abc
+ wxy_^ABC
+ 0: wxy_^ABC
+
+/^abc$/m
+ abc
+ 0: abc
+ qqq\nabc
+ 0: abc
+ abc\nzzz
+ 0: abc
+ qqq\nabc\nzzz
+ 0: abc
+
+/^abc$/
+ abc
+ 0: abc
+\= Expect no match
+ qqq\nabc
+No match
+ abc\nzzz
+No match
+ qqq\nabc\nzzz
+No match
+
+/\Aabc\Z/m
+ abc
+ 0: abc
+ abc\n
+ 0: abc
+\= Expect no match
+ qqq\nabc
+No match
+ abc\nzzz
+No match
+ qqq\nabc\nzzz
+No match
+
+/\A(.)*\Z/s
+ abc\ndef
+ 0: abc\x0adef
+ 1: f
+
+/\A(.)*\Z/m
+\= Expect no match
+ abc\ndef
+No match
+
+/(?:b)|(?::+)/
+ b::c
+ 0: b
+ c::b
+ 0: ::
+
+/[-az]+/
+ az-
+ 0: az-
+\= Expect no match
+ b
+No match
+
+/[az-]+/
+ za-
+ 0: za-
+\= Expect no match
+ b
+No match
+
+/[a\-z]+/
+ a-z
+ 0: a-z
+\= Expect no match
+ b
+No match
+
+/[a-z]+/
+ abcdxyz
+ 0: abcdxyz
+
+/[\d-]+/
+ 12-34
+ 0: 12-34
+\= Expect no match
+ aaa
+No match
+
+/\x5c/
+ \\
+ 0: \
+
+/\x20Z/
+ the Zoo
+ 0: Z
+\= Expect no match
+ Zulu
+No match
+
+/(abc)\1/i
+ abcabc
+ 0: abcabc
+ 1: abc
+ ABCabc
+ 0: ABCabc
+ 1: ABC
+ abcABC
+ 0: abcABC
+ 1: abc
+
+/abc$/
+ abc
+ 0: abc
+ abc\n
+ 0: abc
+\= Expect no match
+ abc\ndef
+No match
+
+/(abc)\123/
+ abc\x53
+ 0: abcS
+ 1: abc
+
+/(abc)\223/
+ abc\x93
+ 0: abc\x93
+ 1: abc
+
+/(abc)\323/
+ abc\xd3
+ 0: abc\xd3
+ 1: abc
+
+/(abc)\100/
+ abc\x40
+ 0: abc@
+ 1: abc
+ abc\100
+ 0: abc@
+ 1: abc
+
+/(abc)\1000/
+ abc\x400
+ 0: abc@0
+ 1: abc
+ abc\x40\x30
+ 0: abc@0
+ 1: abc
+ abc\1000
+ 0: abc@0
+ 1: abc
+ abc\100\x30
+ 0: abc@0
+ 1: abc
+ abc\100\060
+ 0: abc@0
+ 1: abc
+ abc\100\60
+ 0: abc@0
+ 1: abc
+
+/^(A)(B)(C)(D)(E)(F)(G)(H)(I)\8\9$/
+ ABCDEFGHIHI
+ 0: ABCDEFGHIHI
+ 1: A
+ 2: B
+ 3: C
+ 4: D
+ 5: E
+ 6: F
+ 7: G
+ 8: H
+ 9: I
+
+/^[A\8B\9C]+$/
+ A8B9C
+ 0: A8B9C
+\= Expect no match
+ A8B9C\x00
+No match
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\12\123/
+ abcdefghijkllS
+ 0: abcdefghijkllS
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+12: l
+
+/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\12\123/
+ abcdefghijk\12S
+ 0: abcdefghijk\x0aS
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: e
+ 6: f
+ 7: g
+ 8: h
+ 9: i
+10: j
+11: k
+
+/a{0}bc/
+ bc
+ 0: bc
+
+/(a|(bc)){0,0}?xyz/
+ xyz
+ 0: xyz
+
+/abc[\10]de/
+ abc\010de
+ 0: abc\x08de
+
+/abc[\1]de/
+ abc\1de
+ 0: abc\x01de
+
+/(abc)[\1]de/
+ abc\1de
+ 0: abc\x01de
+ 1: abc
+
+/(?s)a.b/
+ a\nb
+ 0: a\x0ab
+
+/^([^a])([^\b])([^c]*)([^d]{3,4})/
+ baNOTccccd
+ 0: baNOTcccc
+ 1: b
+ 2: a
+ 3: NOT
+ 4: cccc
+ baNOTcccd
+ 0: baNOTccc
+ 1: b
+ 2: a
+ 3: NOT
+ 4: ccc
+ baNOTccd
+ 0: baNOTcc
+ 1: b
+ 2: a
+ 3: NO
+ 4: Tcc
+ bacccd
+ 0: baccc
+ 1: b
+ 2: a
+ 3:
+ 4: ccc
+\= Expect no match
+ anything
+No match
+ b\bc
+No match
+ baccd
+No match
+
+/[^a]/
+ Abc
+ 0: A
+
+/[^a]/i
+ Abc
+ 0: b
+
+/[^a]+/
+ AAAaAbc
+ 0: AAA
+
+/[^a]+/i
+ AAAaAbc
+ 0: bc
+
+/[^a]+/
+ bbb\nccc
+ 0: bbb\x0accc
+
+/[^k]$/
+ abc
+ 0: c
+\= Expect no match
+ abk
+No match
+
+/[^k]{2,3}$/
+ abc
+ 0: abc
+ kbc
+ 0: bc
+ kabc
+ 0: abc
+\= Expect no match
+ abk
+No match
+ akb
+No match
+ akk
+No match
+
+/^\d{8,}\@.+[^k]$/
+ 12345678\@a.b.c.d
+ 0: 12345678@a.b.c.d
+ 123456789\@x.y.z
+ 0: 123456789@x.y.z
+\= Expect no match
+ 12345678\@x.y.uk
+No match
+ 1234567\@a.b.c.d
+No match
+
+/(a)\1{8,}/
+ aaaaaaaaa
+ 0: aaaaaaaaa
+ 1: a
+ aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: a
+\= Expect no match
+ aaaaaaa
+No match
+
+/[^a]/
+ aaaabcd
+ 0: b
+ aaAabcd
+ 0: A
+
+/[^a]/i
+ aaaabcd
+ 0: b
+ aaAabcd
+ 0: b
+
+/[^az]/
+ aaaabcd
+ 0: b
+ aaAabcd
+ 0: A
+
+/[^az]/i
+ aaaabcd
+ 0: b
+ aaAabcd
+ 0: b
+
+/\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
+ 0: \x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff
+
+/P[^*]TAIRE[^*]{1,6}?LL/
+ xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+ 0: PSTAIREISLL
+
+/P[^*]TAIRE[^*]{1,}?LL/
+ xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
+ 0: PSTAIREISLL
+
+/(\.\d\d[1-9]?)\d+/
+ 1.230003938
+ 0: .230003938
+ 1: .23
+ 1.875000282
+ 0: .875000282
+ 1: .875
+ 1.235
+ 0: .235
+ 1: .23
+
+/(\.\d\d((?=0)|\d(?=\d)))/
+ 1.230003938
+ 0: .23
+ 1: .23
+ 2:
+ 1.875000282
+ 0: .875
+ 1: .875
+ 2: 5
+\= Expect no match
+ 1.235
+No match
+
+/a(?)b/
+ ab
+ 0: ab
+
+/\b(foo)\s+(\w+)/i
+ Food is on the foo table
+ 0: foo table
+ 1: foo
+ 2: table
+
+/foo(.*)bar/
+ The food is under the bar in the barn.
+ 0: food is under the bar in the bar
+ 1: d is under the bar in the
+
+/foo(.*?)bar/
+ The food is under the bar in the barn.
+ 0: food is under the bar
+ 1: d is under the
+
+/(.*)(\d*)/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 53147
+ 2:
+
+/(.*)(\d+)/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 5314
+ 2: 7
+
+/(.*?)(\d*)/
+ I have 2 numbers: 53147
+ 0:
+ 1:
+ 2:
+
+/(.*?)(\d+)/
+ I have 2 numbers: 53147
+ 0: I have 2
+ 1: I have
+ 2: 2
+
+/(.*)(\d+)$/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers: 5314
+ 2: 7
+
+/(.*?)(\d+)$/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers:
+ 2: 53147
+
+/(.*)\b(\d+)$/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers:
+ 2: 53147
+
+/(.*\D)(\d+)$/
+ I have 2 numbers: 53147
+ 0: I have 2 numbers: 53147
+ 1: I have 2 numbers:
+ 2: 53147
+
+/^\D*(?!123)/
+ ABC123
+ 0: AB
+
+/^(\D*)(?=\d)(?!123)/
+ ABC445
+ 0: ABC
+ 1: ABC
+\= Expect no match
+ ABC123
+No match
+
+/^[W-]46]/
+ W46]789
+ 0: W46]
+ -46]789
+ 0: -46]
+\= Expect no match
+ Wall
+No match
+ Zebra
+No match
+ 42
+No match
+ [abcd]
+No match
+ ]abcd[
+No match
+
+/^[W-\]46]/
+ W46]789
+ 0: W
+ Wall
+ 0: W
+ Zebra
+ 0: Z
+ Xylophone
+ 0: X
+ 42
+ 0: 4
+ [abcd]
+ 0: [
+ ]abcd[
+ 0: ]
+ \\backslash
+ 0: \
+\= Expect no match
+ -46]789
+No match
+ well
+No match
+
+/\d\d\/\d\d\/\d\d\d\d/
+ 01/01/2000
+ 0: 01/01/2000
+
+/word (?:[a-zA-Z0-9]+ ){0,10}otherword/
+ word cat dog elephant mussel cow horse canary baboon snake shark otherword
+ 0: 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
+No match
+
+/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
+No match
+
+/^(a){0,0}/
+ bcd
+ 0:
+ abc
+ 0:
+ aab
+ 0:
+
+/^(a){0,1}/
+ bcd
+ 0:
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: a
+ 1: a
+
+/^(a){0,2}/
+ bcd
+ 0:
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+
+/^(a){0,3}/
+ bcd
+ 0:
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+ aaa
+ 0: aaa
+ 1: a
+
+/^(a){0,}/
+ bcd
+ 0:
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+ aaa
+ 0: aaa
+ 1: a
+ aaaaaaaa
+ 0: aaaaaaaa
+ 1: a
+
+/^(a){1,1}/
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: a
+ 1: a
+\= Expect no match
+ bcd
+No match
+
+/^(a){1,2}/
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+\= Expect no match
+ bcd
+No match
+
+/^(a){1,3}/
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+ aaa
+ 0: aaa
+ 1: a
+\= Expect no match
+ bcd
+No match
+
+/^(a){1,}/
+ abc
+ 0: a
+ 1: a
+ aab
+ 0: aa
+ 1: a
+ aaa
+ 0: aaa
+ 1: a
+ aaaaaaaa
+ 0: aaaaaaaa
+ 1: a
+\= Expect no match
+ bcd
+No match
+
+/.*\.gif/
+ borfle\nbib.gif\nno
+ 0: bib.gif
+
+/.{0,}\.gif/
+ borfle\nbib.gif\nno
+ 0: bib.gif
+
+/.*\.gif/m
+ borfle\nbib.gif\nno
+ 0: bib.gif
+
+/.*\.gif/s
+ borfle\nbib.gif\nno
+ 0: borfle\x0abib.gif
+
+/.*\.gif/ms
+ borfle\nbib.gif\nno
+ 0: borfle\x0abib.gif
+
+/.*$/
+ borfle\nbib.gif\nno
+ 0: no
+
+/.*$/m
+ borfle\nbib.gif\nno
+ 0: borfle
+
+/.*$/s
+ borfle\nbib.gif\nno
+ 0: borfle\x0abib.gif\x0ano
+
+/.*$/ms
+ borfle\nbib.gif\nno
+ 0: borfle\x0abib.gif\x0ano
+
+/.*$/
+ borfle\nbib.gif\nno\n
+ 0: no
+
+/.*$/m
+ borfle\nbib.gif\nno\n
+ 0: borfle
+
+/.*$/s
+ borfle\nbib.gif\nno\n
+ 0: borfle\x0abib.gif\x0ano\x0a
+
+/.*$/ms
+ borfle\nbib.gif\nno\n
+ 0: borfle\x0abib.gif\x0ano\x0a
+
+/(.*X|^B)/
+ abcde\n1234Xyz
+ 0: 1234X
+ 1: 1234X
+ BarFoo
+ 0: B
+ 1: B
+\= Expect no match
+ abcde\nBar
+No match
+
+/(.*X|^B)/m
+ abcde\n1234Xyz
+ 0: 1234X
+ 1: 1234X
+ BarFoo
+ 0: B
+ 1: B
+ abcde\nBar
+ 0: B
+ 1: B
+
+/(.*X|^B)/s
+ abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+ BarFoo
+ 0: B
+ 1: B
+\= Expect no match
+ abcde\nBar
+No match
+
+/(.*X|^B)/ms
+ abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+ BarFoo
+ 0: B
+ 1: B
+ abcde\nBar
+ 0: B
+ 1: B
+
+/(?s)(.*X|^B)/
+ abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ 1: abcde\x0a1234X
+ BarFoo
+ 0: B
+ 1: B
+\= Expect no match
+ abcde\nBar
+No match
+
+/(?s:.*X|^B)/
+ abcde\n1234Xyz
+ 0: abcde\x0a1234X
+ BarFoo
+ 0: B
+\= Expect no match
+ abcde\nBar
+No match
+
+/^.*B/
+\= Expect no match
+ abc\nB
+No match
+
+/(?s)^.*B/
+ abc\nB
+ 0: abc\x0aB
+
+/(?m)^.*B/
+ abc\nB
+ 0: B
+
+/(?ms)^.*B/
+ abc\nB
+ 0: abc\x0aB
+
+/(?ms)^B/
+ abc\nB
+ 0: B
+
+/(?s)B$/
+ B\n
+ 0: B
+
+/^[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
+ 0: 123456654321
+
+/^\d\d\d\d\d\d\d\d\d\d\d\d/
+ 123456654321
+ 0: 123456654321
+
+/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
+ 123456654321
+ 0: 123456654321
+
+/^[abc]{12}/
+ abcabcabcabc
+ 0: abcabcabcabc
+
+/^[a-c]{12}/
+ abcabcabcabc
+ 0: abcabcabcabc
+
+/^(a|b|c){12}/
+ abcabcabcabc
+ 0: abcabcabcabc
+ 1: c
+
+/^[abcdefghijklmnopqrstuvwxy0123456789]/
+ n
+ 0: n
+\= Expect no match
+ z
+No match
+
+/abcde{0,0}/
+ abcd
+ 0: abcd
+\= Expect no match
+ abce
+No match
+
+/ab[cd]{0,0}e/
+ abe
+ 0: abe
+\= Expect no match
+ abcde
+No match
+
+/ab(c){0,0}d/
+ abd
+ 0: abd
+\= Expect no match
+ abcd
+No match
+
+/a(b*)/
+ a
+ 0: a
+ 1:
+ ab
+ 0: ab
+ 1: b
+ abbbb
+ 0: abbbb
+ 1: bbbb
+\= Expect no match
+ bbbbb
+No match
+
+/ab\d{0}e/
+ abe
+ 0: abe
+\= Expect no match
+ ab1e
+No match
+
+/"([^\\"]+|\\.)*"/
+ the \"quick\" brown fox
+ 0: "quick"
+ 1: quick
+ \"the \\\"quick\\\" brown fox\"
+ 0: "the \"quick\" brown fox"
+ 1: brown fox
+
+/.*?/g,aftertext
+ abc
+ 0:
+ 0+ abc
+ 0: a
+ 0+ bc
+ 0:
+ 0+ bc
+ 0: b
+ 0+ c
+ 0:
+ 0+ c
+ 0: c
+ 0+
+ 0:
+ 0+
+
+/\b/g,aftertext
+ abc
+ 0:
+ 0+ abc
+ 0:
+ 0+
+
+/\b/g,aftertext
+ abc
+ 0:
+ 0+ abc
+ 0:
+ 0+
+
+//g
+ abc
+ 0:
+ 0:
+ 0:
+ 0:
+
+/<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>
+ 0: <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>
+ 1: BGCOLOR='#DBE9E9'
+ 2: align=left valign=top
+ 3: 43.
+ 4: <a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)
+ 5:
+ 6:
+ 7: <unset>
+ 8: align=left valign=top
+ 9: Lega lstaff.com
+10: align=left valign=top
+11: CA - Statewide
+
+/a[^a]b/
+ acb
+ 0: acb
+ a\nb
+ 0: a\x0ab
+
+/a.b/
+ acb
+ 0: acb
+\= Expect no match
+ a\nb
+No match
+
+/a[^a]b/s
+ acb
+ 0: acb
+ a\nb
+ 0: a\x0ab
+
+/a.b/s
+ acb
+ 0: acb
+ a\nb
+ 0: a\x0ab
+
+/^(b+?|a){1,2}?c/
+ bac
+ 0: bac
+ 1: a
+ bbac
+ 0: bbac
+ 1: a
+ bbbac
+ 0: bbbac
+ 1: a
+ bbbbac
+ 0: bbbbac
+ 1: a
+ bbbbbac
+ 0: bbbbbac
+ 1: a
+
+/^(b+|a){1,2}?c/
+ bac
+ 0: bac
+ 1: a
+ bbac
+ 0: bbac
+ 1: a
+ bbbac
+ 0: bbbac
+ 1: a
+ bbbbac
+ 0: bbbbac
+ 1: a
+ bbbbbac
+ 0: bbbbbac
+ 1: a
+
+/(?!\A)x/m
+ a\bx\n
+ 0: x
+ a\nx\n
+ 0: x
+\= Expect no match
+ x\nb\n
+No match
+
+/(A|B)*?CD/
+ CD
+ 0: CD
+
+/(A|B)*CD/
+ CD
+ 0: CD
+
+/(AB)*?\1/
+ ABABAB
+ 0: ABAB
+ 1: AB
+
+/(AB)*\1/
+ ABABAB
+ 0: ABABAB
+ 1: AB
+
+/(?<!bar)foo/
+ foo
+ 0: foo
+ catfood
+ 0: foo
+ arfootle
+ 0: foo
+ rfoosh
+ 0: foo
+\= Expect no match
+ barfoo
+No match
+ towbarfoo
+No match
+
+/\w{3}(?<!bar)foo/
+ catfood
+ 0: catfoo
+\= Expect no match
+ foo
+No match
+ barfoo
+No match
+ towbarfoo
+No match
+
+/(?<=(foo)a)bar/
+ fooabar
+ 0: bar
+ 1: foo
+\= Expect no match
+ bar
+No match
+ foobbar
+No match
+
+/\Aabc\z/m
+ abc
+ 0: abc
+\= Expect no match
+ abc\n
+No match
+ qqq\nabc
+No match
+ abc\nzzz
+No match
+ qqq\nabc\nzzz
+No match
+
+"(?>.*/)foo"
+ /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo
+ 0: /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/
+No match
+
+/(?>(\.\d\d[1-9]?))\d+/
+ 1.230003938
+ 0: .230003938
+ 1: .23
+ 1.875000282
+ 0: .875000282
+ 1: .875
+\= Expect no match
+ 1.235
+No match
+
+/^((?>\w+)|(?>\s+))*$/
+ now is the time for all good men to come to the aid of the party
+ 0: now is the time for all good men to come to the aid of the party
+ 1: party
+\= Expect no match
+ this is not a line with only words and spaces!
+No match
+
+/(\d+)(\w)/
+ 12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+ 12345+
+ 0: 12345
+ 1: 1234
+ 2: 5
+
+/((?>\d+))(\w)/
+ 12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+\= Expect no match
+ 12345+
+No match
+
+/(?>a+)b/
+ aaab
+ 0: aaab
+
+/((?>a+)b)/
+ aaab
+ 0: aaab
+ 1: aaab
+
+/(?>(a+))b/
+ aaab
+ 0: aaab
+ 1: aaa
+
+/(?>b)+/
+ aaabbbccc
+ 0: bbb
+
+/(?>a+|b+|c+)*c/
+ aaabbbbccccd
+ 0: aaabbbbc
+
+/((?>[^()]+)|\([^()]*\))+/
+ ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+
+/\(((?>[^()]+)|\([^()]+\))+\)/
+ (abc)
+ 0: (abc)
+ 1: abc
+ (abc(def)xyz)
+ 0: (abc(def)xyz)
+ 1: xyz
+\= Expect no match
+ ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/a(?-i)b/i
+ ab
+ 0: ab
+ Ab
+ 0: Ab
+\= Expect no match
+ aB
+No match
+ AB
+No match
+
+/(a (?x)b c)d e/
+ a bcd e
+ 0: a bcd e
+ 1: a bc
+\= Expect no match
+ a b cd e
+No match
+ abcd e
+No match
+ a bcde
+No match
+
+/(a b(?x)c d (?-x)e f)/
+ a bcde f
+ 0: a bcde f
+ 1: a bcde f
+\= Expect no match
+ abcdef
+No match
+
+/(a(?i)b)c/
+ abc
+ 0: abc
+ 1: ab
+ aBc
+ 0: aBc
+ 1: aB
+\= Expect no match
+ abC
+No match
+ aBC
+No match
+ Abc
+No match
+ ABc
+No match
+ ABC
+No match
+ AbC
+No match
+
+/a(?i:b)c/
+ abc
+ 0: abc
+ aBc
+ 0: aBc
+\= Expect no match
+ ABC
+No match
+ abC
+No match
+ aBC
+No match
+
+/a(?i:b)*c/
+ aBc
+ 0: aBc
+ aBBc
+ 0: aBBc
+\= Expect no match
+ aBC
+No match
+ aBBC
+No match
+
+/a(?=b(?i)c)\w\wd/
+ abcd
+ 0: abcd
+ abCd
+ 0: abCd
+\= Expect no match
+ aBCd
+No match
+ abcD
+No match
+
+/(?s-i:more.*than).*million/i
+ more than million
+ 0: more than million
+ more than MILLION
+ 0: more than MILLION
+ more \n than Million
+ 0: more \x0a than Million
+\= Expect no match
+ MORE THAN MILLION
+No match
+ more \n than \n million
+No match
+
+/(?:(?s-i)more.*than).*million/i
+ more than million
+ 0: more than million
+ more than MILLION
+ 0: more than MILLION
+ more \n than Million
+ 0: more \x0a than Million
+\= Expect no match
+ MORE THAN MILLION
+No match
+ more \n than \n million
+No match
+
+/(?>a(?i)b+)+c/
+ abc
+ 0: abc
+ aBbc
+ 0: aBbc
+ aBBc
+ 0: aBBc
+\= Expect no match
+ Abc
+No match
+ abAb
+No match
+ abbC
+No match
+
+/(?=a(?i)b)\w\wc/
+ abc
+ 0: abc
+ aBc
+ 0: aBc
+\= Expect no match
+ Ab
+No match
+ abC
+No match
+ aBC
+No match
+
+/(?<=a(?i)b)(\w\w)c/
+ abxxc
+ 0: xxc
+ 1: xx
+ aBxxc
+ 0: xxc
+ 1: xx
+\= Expect no match
+ Abxxc
+No match
+ ABxxc
+No match
+ abxxC
+No match
+
+/(?:(a)|b)(?(1)A|B)/
+ aA
+ 0: aA
+ 1: a
+ bB
+ 0: bB
+\= Expect no match
+ aB
+No match
+ bA
+No match
+
+/^(a)?(?(1)a|b)+$/
+ aa
+ 0: aa
+ 1: a
+ b
+ 0: b
+ bb
+ 0: bb
+\= Expect no match
+ ab
+No match
+
+# Perl gets this next one wrong if the pattern ends with $; in that case it
+# fails to match "12".
+
+/^(?(?=abc)\w{3}:|\d\d)/
+ abc:
+ 0: abc:
+ 12
+ 0: 12
+ 123
+ 0: 12
+\= Expect no match
+ xyz
+No match
+
+/^(?(?!abc)\d\d|\w{3}:)$/
+ abc:
+ 0: abc:
+ 12
+ 0: 12
+\= Expect no match
+ 123
+No match
+ xyz
+No match
+
+/(?(?<=foo)bar|cat)/
+ foobar
+ 0: bar
+ cat
+ 0: cat
+ fcat
+ 0: cat
+ focat
+ 0: cat
+\= Expect no match
+ foocat
+No match
+
+/(?(?<!foo)cat|bar)/
+ foobar
+ 0: bar
+ cat
+ 0: cat
+ fcat
+ 0: cat
+ focat
+ 0: cat
+\= Expect no match
+ foocat
+No match
+
+/( \( )? [^()]+ (?(1) \) |) /x
+ abcd
+ 0: abcd
+ (abcd)
+ 0: (abcd)
+ 1: (
+ the quick (abcd) fox
+ 0: the quick
+ (abcd
+ 0: abcd
+
+/( \( )? [^()]+ (?(1) \) ) /x
+ abcd
+ 0: abcd
+ (abcd)
+ 0: (abcd)
+ 1: (
+ the quick (abcd) fox
+ 0: the quick
+ (abcd
+ 0: abcd
+
+/^(?(2)a|(1)(2))+$/
+ 12
+ 0: 12
+ 1: 1
+ 2: 2
+ 12a
+ 0: 12a
+ 1: 1
+ 2: 2
+ 12aa
+ 0: 12aa
+ 1: 1
+ 2: 2
+\= Expect no match
+ 1234
+No match
+
+/((?i)blah)\s+\1/
+ blah blah
+ 0: blah blah
+ 1: blah
+ BLAH BLAH
+ 0: BLAH BLAH
+ 1: BLAH
+ Blah Blah
+ 0: Blah Blah
+ 1: Blah
+ blaH blaH
+ 0: blaH blaH
+ 1: blaH
+\= Expect no match
+ blah BLAH
+No match
+ Blah blah
+No match
+ blaH blah
+No match
+
+/((?i)blah)\s+(?i:\1)/
+ blah blah
+ 0: blah blah
+ 1: blah
+ BLAH BLAH
+ 0: BLAH BLAH
+ 1: BLAH
+ Blah Blah
+ 0: Blah Blah
+ 1: Blah
+ blaH blaH
+ 0: blaH blaH
+ 1: blaH
+ blah BLAH
+ 0: blah BLAH
+ 1: blah
+ Blah blah
+ 0: Blah blah
+ 1: Blah
+ blaH blah
+ 0: blaH blah
+ 1: blaH
+
+/((?i)blah)\s+(?m)A(?i:\1)/
+ blah ABLAH
+ 0: blah ABLAH
+ 1: blah
+\= Expect no match
+ blah aBLAH
+No match
+
+/(?>a*)*/
+ a
+ 0: a
+ aa
+ 0: aa
+ aaaa
+ 0: aaaa
+
+/(abc|)+/
+ abc
+ 0: abc
+ 1:
+ abcabc
+ 0: abcabc
+ 1:
+ abcabcabc
+ 0: abcabcabc
+ 1:
+ xyz
+ 0:
+ 1:
+
+/([a]*)*/
+ a
+ 0: a
+ 1:
+ aaaaa
+ 0: aaaaa
+ 1:
+
+/([ab]*)*/
+ a
+ 0: a
+ 1:
+ b
+ 0: b
+ 1:
+ ababab
+ 0: ababab
+ 1:
+ aaaabcde
+ 0: aaaab
+ 1:
+ bbbb
+ 0: bbbb
+ 1:
+
+/([^a]*)*/
+ b
+ 0: b
+ 1:
+ bbbb
+ 0: bbbb
+ 1:
+ aaa
+ 0:
+ 1:
+
+/([^ab]*)*/
+ cccc
+ 0: cccc
+ 1:
+ abab
+ 0:
+ 1:
+
+/([a]*?)*/
+ a
+ 0:
+ 1:
+ aaaa
+ 0:
+ 1:
+
+/([ab]*?)*/
+ a
+ 0:
+ 1:
+ b
+ 0:
+ 1:
+ abab
+ 0:
+ 1:
+ baba
+ 0:
+ 1:
+
+/([^a]*?)*/
+ b
+ 0:
+ 1:
+ bbbb
+ 0:
+ 1:
+ aaa
+ 0:
+ 1:
+
+/([^ab]*?)*/
+ c
+ 0:
+ 1:
+ cccc
+ 0:
+ 1:
+ baba
+ 0:
+ 1:
+
+/(?>a*)*/
+ a
+ 0: a
+ aaabcde
+ 0: aaa
+
+/((?>a*))*/
+ aaaaa
+ 0: aaaaa
+ 1:
+ aabbaa
+ 0: aa
+ 1:
+
+/((?>a*?))*/
+ aaaaa
+ 0:
+ 1:
+ aabbaa
+ 0:
+ 1:
+
+/(?(?=[^a-z]+[a-z]) \d{2}-[a-z]{3}-\d{2} | \d{2}-\d{2}-\d{2} ) /x
+ 12-sep-98
+ 0: 12-sep-98
+ 12-09-98
+ 0: 12-09-98
+\= Expect no match
+ sep-12-98
+No match
+
+/(?<=(foo))bar\1/
+ foobarfoo
+ 0: barfoo
+ 1: foo
+ foobarfootling
+ 0: barfoo
+ 1: foo
+\= Expect no match
+ foobar
+No match
+ barfoo
+No match
+
+/(?i:saturday|sunday)/
+ saturday
+ 0: saturday
+ sunday
+ 0: sunday
+ Saturday
+ 0: Saturday
+ Sunday
+ 0: Sunday
+ SATURDAY
+ 0: SATURDAY
+ SUNDAY
+ 0: SUNDAY
+ SunDay
+ 0: SunDay
+
+/(a(?i)bc|BB)x/
+ abcx
+ 0: abcx
+ 1: abc
+ aBCx
+ 0: aBCx
+ 1: aBC
+ bbx
+ 0: bbx
+ 1: bb
+ BBx
+ 0: BBx
+ 1: BB
+\= Expect no match
+ abcX
+No match
+ aBCX
+No match
+ bbX
+No match
+ BBX
+No match
+
+/^([ab](?i)[cd]|[ef])/
+ ac
+ 0: ac
+ 1: ac
+ aC
+ 0: aC
+ 1: aC
+ bD
+ 0: bD
+ 1: bD
+ elephant
+ 0: e
+ 1: e
+ Europe
+ 0: E
+ 1: E
+ frog
+ 0: f
+ 1: f
+ France
+ 0: F
+ 1: F
+\= Expect no match
+ Africa
+No match
+
+/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
+ ab
+ 0: ab
+ 1: ab
+ aBd
+ 0: aBd
+ 1: aBd
+ xy
+ 0: xy
+ 1: xy
+ xY
+ 0: xY
+ 1: xY
+ zebra
+ 0: z
+ 1: z
+ Zambesi
+ 0: Z
+ 1: Z
+\= Expect no match
+ aCD
+No match
+ XY
+No match
+
+/(?<=foo\n)^bar/m
+ foo\nbar
+ 0: bar
+\= Expect no match
+ bar
+No match
+ baz\nbar
+No match
+
+/(?<=(?<!foo)bar)baz/
+ barbaz
+ 0: baz
+ barbarbaz
+ 0: baz
+ koobarbaz
+ 0: baz
+\= Expect no match
+ baz
+No match
+ foobarbaz
+No match
+
+# 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
+ 0: aaaaa
+ 1: a
+ aaaaaaa
+ 0: aaaaaaa
+ 1: a
+ aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+\= Expect no match
+ a
+No match
+ aa
+No match
+ aaa
+No match
+ aaaaaaaa
+No match
+ aaaaaaaaa
+No match
+ aaaaaaaaaaa
+No match
+ aaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaaaa
+No match
+
+/^(a\1?)(a\1?)(a\2?)(a\3?)$/
+ aaaa
+ 0: aaaa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ aaaaa
+ 0: aaaaa
+ 1: a
+ 2: aa
+ 3: a
+ 4: a
+ aaaaaa
+ 0: aaaaaa
+ 1: a
+ 2: aa
+ 3: a
+ 4: aa
+ aaaaaaa
+ 0: aaaaaaa
+ 1: a
+ 2: aa
+ 3: aaa
+ 4: a
+ aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: a
+ 2: aa
+ 3: aaa
+ 4: aaaa
+\= Expect no match
+ a
+No match
+ aa
+No match
+ aaa
+No match
+ aaaaaaaa
+No match
+ aaaaaaaaa
+No match
+ aaaaaaaaaaa
+No match
+ aaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaaa
+No match
+ aaaaaaaaaaaaaaaa
+No match
+
+# The following tests are taken from the Perl 5.005 test suite; some of them
+# are compatible with 5.004, but I'd rather not have to sort them out.
+
+/abc/
+ abc
+ 0: abc
+ xabcy
+ 0: abc
+ ababc
+ 0: abc
+\= Expect no match
+ xbc
+No match
+ axc
+No match
+ abx
+No match
+
+/ab*c/
+ abc
+ 0: abc
+
+/ab*bc/
+ abc
+ 0: abc
+ abbc
+ 0: abbc
+ abbbbc
+ 0: abbbbc
+
+/.{1}/
+ abbbbc
+ 0: a
+
+/.{3,4}/
+ abbbbc
+ 0: abbb
+
+/ab{0,}bc/
+ abbbbc
+ 0: abbbbc
+
+/ab+bc/
+ abbc
+ 0: abbc
+\= Expect no match
+ abc
+No match
+ abq
+No match
+
+/ab{1,}bc/
+
+/ab+bc/
+ abbbbc
+ 0: abbbbc
+
+/ab{1,}bc/
+ abbbbc
+ 0: abbbbc
+
+/ab{1,3}bc/
+ abbbbc
+ 0: abbbbc
+
+/ab{3,4}bc/
+ abbbbc
+ 0: abbbbc
+
+/ab{4,5}bc/
+\= Expect no match
+ abq
+No match
+ abbbbc
+No match
+
+/ab?bc/
+ abbc
+ 0: abbc
+ abc
+ 0: abc
+
+/ab{0,1}bc/
+ abc
+ 0: abc
+
+/ab?bc/
+
+/ab?c/
+ abc
+ 0: abc
+
+/ab{0,1}c/
+ abc
+ 0: abc
+
+/^abc$/
+ abc
+ 0: abc
+\= Expect no match
+ abbbbc
+No match
+ abcc
+No match
+
+/^abc/
+ abcc
+ 0: abc
+
+/^abc$/
+
+/abc$/
+ aabc
+ 0: abc
+\= Expect no match
+ aabcd
+No match
+
+/^/
+ abc
+ 0:
+
+/$/
+ abc
+ 0:
+
+/a.c/
+ abc
+ 0: abc
+ axc
+ 0: axc
+
+/a.*c/
+ axyzc
+ 0: axyzc
+
+/a[bc]d/
+ abd
+ 0: abd
+\= Expect no match
+ axyzd
+No match
+ abc
+No match
+
+/a[b-d]e/
+ ace
+ 0: ace
+
+/a[b-d]/
+ aac
+ 0: ac
+
+/a[-b]/
+ a-
+ 0: a-
+
+/a[b-]/
+ a-
+ 0: a-
+
+/a]/
+ a]
+ 0: a]
+
+/a[]]b/
+ a]b
+ 0: a]b
+
+/a[^bc]d/
+ aed
+ 0: aed
+\= Expect no match
+ abd
+No match
+ abd
+No match
+
+/a[^-b]c/
+ adc
+ 0: adc
+
+/a[^]b]c/
+ adc
+ 0: adc
+ a-c
+ 0: a-c
+\= Expect no match
+ a]c
+No match
+
+/\ba\b/
+ a-
+ 0: a
+ -a
+ 0: a
+ -a-
+ 0: a
+
+/\by\b/
+\= Expect no match
+ xy
+No match
+ yz
+No match
+ xyz
+No match
+
+/\Ba\B/
+\= Expect no match
+ a-
+No match
+ -a
+No match
+ -a-
+No match
+
+/\By\b/
+ xy
+ 0: y
+
+/\by\B/
+ yz
+ 0: y
+
+/\By\B/
+ xyz
+ 0: y
+
+/\w/
+ a
+ 0: a
+
+/\W/
+ -
+ 0: -
+\= Expect no match
+ a
+No match
+
+/a\sb/
+ a b
+ 0: a b
+
+/a\Sb/
+ a-b
+ 0: a-b
+\= Expect no match
+ a b
+No match
+
+/\d/
+ 1
+ 0: 1
+
+/\D/
+ -
+ 0: -
+\= Expect no match
+ 1
+No match
+
+/[\w]/
+ a
+ 0: a
+
+/[\W]/
+ -
+ 0: -
+\= Expect no match
+ a
+No match
+
+/a[\s]b/
+ a b
+ 0: a b
+
+/a[\S]b/
+ a-b
+ 0: a-b
+\= Expect no match
+ a b
+No match
+
+/[\d]/
+ 1
+ 0: 1
+
+/[\D]/
+ -
+ 0: -
+\= Expect no match
+ 1
+No match
+
+/ab|cd/
+ abc
+ 0: ab
+ abcd
+ 0: ab
+
+/()ef/
+ def
+ 0: ef
+ 1:
+
+/$b/
+
+/a\(b/
+ a(b
+ 0: a(b
+
+/a\(*b/
+ ab
+ 0: ab
+ a((b
+ 0: a((b
+
+/a\\b/
+ a\\b
+ 0: a\b
+
+/((a))/
+ abc
+ 0: a
+ 1: a
+ 2: a
+
+/(a)b(c)/
+ abc
+ 0: abc
+ 1: a
+ 2: c
+
+/a+b+c/
+ aabbabc
+ 0: abc
+
+/a{1,}b{1,}c/
+ aabbabc
+ 0: abc
+
+/a.+?c/
+ abcabc
+ 0: abc
+
+/(a+|b)*/
+ ab
+ 0: ab
+ 1: b
+
+/(a+|b){0,}/
+ ab
+ 0: ab
+ 1: b
+
+/(a+|b)+/
+ ab
+ 0: ab
+ 1: b
+
+/(a+|b){1,}/
+ ab
+ 0: ab
+ 1: b
+
+/(a+|b)?/
+ ab
+ 0: a
+ 1: a
+
+/(a+|b){0,1}/
+ ab
+ 0: a
+ 1: a
+
+/[^ab]*/
+ cde
+ 0: cde
+
+/abc/
+\= Expect no match
+ b
+No match
+
+/a*/
+ \
+ 0:
+
+/([abc])*d/
+ abbbcd
+ 0: abbbcd
+ 1: c
+
+/([abc])*bcd/
+ abcd
+ 0: abcd
+ 1: a
+
+/a|b|c|d|e/
+ e
+ 0: e
+
+/(a|b|c|d|e)f/
+ ef
+ 0: ef
+ 1: e
+
+/abcd*efg/
+ abcdefg
+ 0: abcdefg
+
+/ab*/
+ xabyabbbz
+ 0: ab
+ xayabbbz
+ 0: a
+
+/(ab|cd)e/
+ abcde
+ 0: cde
+ 1: cd
+
+/[abhgefdc]ij/
+ hij
+ 0: hij
+
+/^(ab|cd)e/
+
+/(abc|)ef/
+ abcdef
+ 0: ef
+ 1:
+
+/(a|b)c*d/
+ abcd
+ 0: bcd
+ 1: b
+
+/(ab|ab*)bc/
+ abc
+ 0: abc
+ 1: a
+
+/a([bc]*)c*/
+ abc
+ 0: abc
+ 1: bc
+
+/a([bc]*)(c*d)/
+ abcd
+ 0: abcd
+ 1: bc
+ 2: d
+
+/a([bc]+)(c*d)/
+ abcd
+ 0: abcd
+ 1: bc
+ 2: d
+
+/a([bc]*)(c+d)/
+ abcd
+ 0: abcd
+ 1: b
+ 2: cd
+
+/a[bcd]*dcdcde/
+ adcdcde
+ 0: adcdcde
+
+/a[bcd]+dcdcde/
+\= Expect no match
+ abcde
+No match
+ adcdcde
+No match
+
+/(ab|a)b*c/
+ abc
+ 0: abc
+ 1: ab
+
+/((a)(b)c)(d)/
+ abcd
+ 0: abcd
+ 1: abc
+ 2: a
+ 3: b
+ 4: d
+
+/[a-zA-Z_][a-zA-Z0-9_]*/
+ alpha
+ 0: alpha
+
+/^a(bc+|b[eh])g|.h$/
+ abh
+ 0: bh
+
+/(bc+d$|ef*g.|h?i(j|k))/
+ effgz
+ 0: effgz
+ 1: effgz
+ ij
+ 0: ij
+ 1: ij
+ 2: j
+ reffgz
+ 0: effgz
+ 1: effgz
+\= Expect no match
+ effg
+No match
+ bcdd
+No match
+
+/((((((((((a))))))))))/
+ a
+ 0: a
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+
+/((((((((((a))))))))))\10/
+ aa
+ 0: aa
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+10: a
+
+/(((((((((a)))))))))/
+ a
+ 0: a
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+
+/multiple words of text/
+\= Expect no match
+ aa
+No match
+ uh-uh
+No match
+
+/multiple words/
+ multiple words, yeah
+ 0: multiple words
+
+/(.*)c(.*)/
+ abcde
+ 0: abcde
+ 1: ab
+ 2: de
+
+/\((.*), (.*)\)/
+ (a, b)
+ 0: (a, b)
+ 1: a
+ 2: b
+
+/[k]/
+
+/abcd/
+ abcd
+ 0: abcd
+
+/a(bc)d/
+ abcd
+ 0: abcd
+ 1: bc
+
+/a[-]?c/
+ ac
+ 0: ac
+
+/(abc)\1/
+ abcabc
+ 0: abcabc
+ 1: abc
+
+/([a-c]*)\1/
+ abcabc
+ 0: abcabc
+ 1: abc
+
+/(a)|\1/
+ a
+ 0: a
+ 1: a
+ ab
+ 0: a
+ 1: a
+\= Expect no match
+ x
+No match
+
+/(([a-c])b*?\2)*/
+ ababbbcbc
+ 0: ababb
+ 1: bb
+ 2: b
+
+/(([a-c])b*?\2){3}/
+ ababbbcbc
+ 0: ababbbcbc
+ 1: cbc
+ 2: c
+
+/((\3|b)\2(a)x)+/
+ aaaxabaxbaaxbbax
+ 0: bbax
+ 1: bbax
+ 2: b
+ 3: a
+
+/((\3|b)\2(a)){2,}/
+ bbaababbabaaaaabbaaaabba
+ 0: bbaaaabba
+ 1: bba
+ 2: b
+ 3: a
+
+/abc/i
+ ABC
+ 0: ABC
+ XABCY
+ 0: ABC
+ ABABC
+ 0: ABC
+\= Expect no match
+ aaxabxbaxbbx
+No match
+ XBC
+No match
+ AXC
+No match
+ ABX
+No match
+
+/ab*c/i
+ ABC
+ 0: ABC
+
+/ab*bc/i
+ ABC
+ 0: ABC
+ ABBC
+ 0: ABBC
+
+/ab*?bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab{0,}?bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab+?bc/i
+ ABBC
+ 0: ABBC
+
+/ab+bc/i
+\= Expect no match
+ ABC
+No match
+ ABQ
+No match
+
+/ab{1,}bc/i
+
+/ab+bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab{1,}?bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab{1,3}?bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab{3,4}?bc/i
+ ABBBBC
+ 0: ABBBBC
+
+/ab{4,5}?bc/i
+\= Expect no match
+ ABQ
+No match
+ ABBBBC
+No match
+
+/ab??bc/i
+ ABBC
+ 0: ABBC
+ ABC
+ 0: ABC
+
+/ab{0,1}?bc/i
+ ABC
+ 0: ABC
+
+/ab??bc/i
+
+/ab??c/i
+ ABC
+ 0: ABC
+
+/ab{0,1}?c/i
+ ABC
+ 0: ABC
+
+/^abc$/i
+ ABC
+ 0: ABC
+\= Expect no match
+ ABBBBC
+No match
+ ABCC
+No match
+
+/^abc/i
+ ABCC
+ 0: ABC
+
+/^abc$/i
+
+/abc$/i
+ AABC
+ 0: ABC
+
+/^/i
+ ABC
+ 0:
+
+/$/i
+ ABC
+ 0:
+
+/a.c/i
+ ABC
+ 0: ABC
+ AXC
+ 0: AXC
+
+/a.*?c/i
+ AXYZC
+ 0: AXYZC
+
+/a.*c/i
+ AABC
+ 0: AABC
+\= Expect no match
+ AXYZD
+No match
+
+/a[bc]d/i
+ ABD
+ 0: ABD
+
+/a[b-d]e/i
+ ACE
+ 0: ACE
+\= Expect no match
+ ABC
+No match
+ ABD
+No match
+
+/a[b-d]/i
+ AAC
+ 0: AC
+
+/a[-b]/i
+ A-
+ 0: A-
+
+/a[b-]/i
+ A-
+ 0: A-
+
+/a]/i
+ A]
+ 0: A]
+
+/a[]]b/i
+ A]B
+ 0: A]B
+
+/a[^bc]d/i
+ AED
+ 0: AED
+
+/a[^-b]c/i
+ ADC
+ 0: ADC
+\= Expect no match
+ ABD
+No match
+ A-C
+No match
+
+/a[^]b]c/i
+ ADC
+ 0: ADC
+
+/ab|cd/i
+ ABC
+ 0: AB
+ ABCD
+ 0: AB
+
+/()ef/i
+ DEF
+ 0: EF
+ 1:
+
+/$b/i
+\= Expect no match
+ A]C
+No match
+ B
+No match
+
+/a\(b/i
+ A(B
+ 0: A(B
+
+/a\(*b/i
+ AB
+ 0: AB
+ A((B
+ 0: A((B
+
+/a\\b/i
+ A\\b
+ 0: A\b
+ a\\B
+ 0: a\B
+
+/((a))/i
+ ABC
+ 0: A
+ 1: A
+ 2: A
+
+/(a)b(c)/i
+ ABC
+ 0: ABC
+ 1: A
+ 2: C
+
+/a+b+c/i
+ AABBABC
+ 0: ABC
+
+/a{1,}b{1,}c/i
+ AABBABC
+ 0: ABC
+
+/a.+?c/i
+ ABCABC
+ 0: ABC
+
+/a.*?c/i
+ ABCABC
+ 0: ABC
+
+/a.{0,5}?c/i
+ ABCABC
+ 0: ABC
+
+/(a+|b)*/i
+ AB
+ 0: AB
+ 1: B
+
+/(a+|b){0,}/i
+ AB
+ 0: AB
+ 1: B
+
+/(a+|b)+/i
+ AB
+ 0: AB
+ 1: B
+
+/(a+|b){1,}/i
+ AB
+ 0: AB
+ 1: B
+
+/(a+|b)?/i
+ AB
+ 0: A
+ 1: A
+
+/(a+|b){0,1}/i
+ AB
+ 0: A
+ 1: A
+
+/(a+|b){0,1}?/i
+ AB
+ 0:
+
+/[^ab]*/i
+ CDE
+ 0: CDE
+
+/([abc])*d/i
+ ABBBCD
+ 0: ABBBCD
+ 1: C
+
+/([abc])*bcd/i
+ ABCD
+ 0: ABCD
+ 1: A
+
+/a|b|c|d|e/i
+ E
+ 0: E
+
+/(a|b|c|d|e)f/i
+ EF
+ 0: EF
+ 1: E
+
+/abcd*efg/i
+ ABCDEFG
+ 0: ABCDEFG
+
+/ab*/i
+ XABYABBBZ
+ 0: AB
+ XAYABBBZ
+ 0: A
+
+/(ab|cd)e/i
+ ABCDE
+ 0: CDE
+ 1: CD
+
+/[abhgefdc]ij/i
+ HIJ
+ 0: HIJ
+
+/^(ab|cd)e/i
+\= Expect no match
+ ABCDE
+No match
+
+/(abc|)ef/i
+ ABCDEF
+ 0: EF
+ 1:
+
+/(a|b)c*d/i
+ ABCD
+ 0: BCD
+ 1: B
+
+/(ab|ab*)bc/i
+ ABC
+ 0: ABC
+ 1: A
+
+/a([bc]*)c*/i
+ ABC
+ 0: ABC
+ 1: BC
+
+/a([bc]*)(c*d)/i
+ ABCD
+ 0: ABCD
+ 1: BC
+ 2: D
+
+/a([bc]+)(c*d)/i
+ ABCD
+ 0: ABCD
+ 1: BC
+ 2: D
+
+/a([bc]*)(c+d)/i
+ ABCD
+ 0: ABCD
+ 1: B
+ 2: CD
+
+/a[bcd]*dcdcde/i
+ ADCDCDE
+ 0: ADCDCDE
+
+/a[bcd]+dcdcde/i
+
+/(ab|a)b*c/i
+ ABC
+ 0: ABC
+ 1: AB
+
+/((a)(b)c)(d)/i
+ ABCD
+ 0: ABCD
+ 1: ABC
+ 2: A
+ 3: B
+ 4: D
+
+/[a-zA-Z_][a-zA-Z0-9_]*/i
+ ALPHA
+ 0: ALPHA
+
+/^a(bc+|b[eh])g|.h$/i
+ ABH
+ 0: BH
+
+/(bc+d$|ef*g.|h?i(j|k))/i
+ EFFGZ
+ 0: EFFGZ
+ 1: EFFGZ
+ IJ
+ 0: IJ
+ 1: IJ
+ 2: J
+ REFFGZ
+ 0: EFFGZ
+ 1: EFFGZ
+\= Expect no match
+ ADCDCDE
+No match
+ EFFG
+No match
+ BCDD
+No match
+
+/((((((((((a))))))))))/i
+ A
+ 0: A
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+10: A
+
+/((((((((((a))))))))))\10/i
+ AA
+ 0: AA
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+10: A
+
+/(((((((((a)))))))))/i
+ A
+ 0: A
+ 1: A
+ 2: A
+ 3: A
+ 4: A
+ 5: A
+ 6: A
+ 7: A
+ 8: A
+ 9: A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))/i
+ A
+ 0: A
+ 1: A
+
+/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/i
+ C
+ 0: C
+ 1: C
+
+/multiple words of text/i
+\= Expect no match
+ AA
+No match
+ UH-UH
+No match
+
+/multiple words/i
+ MULTIPLE WORDS, YEAH
+ 0: MULTIPLE WORDS
+
+/(.*)c(.*)/i
+ ABCDE
+ 0: ABCDE
+ 1: AB
+ 2: DE
+
+/\((.*), (.*)\)/i
+ (A, B)
+ 0: (A, B)
+ 1: A
+ 2: B
+
+/[k]/i
+
+/abcd/i
+ ABCD
+ 0: ABCD
+
+/a(bc)d/i
+ ABCD
+ 0: ABCD
+ 1: BC
+
+/a[-]?c/i
+ AC
+ 0: AC
+
+/(abc)\1/i
+ ABCABC
+ 0: ABCABC
+ 1: ABC
+
+/([a-c]*)\1/i
+ ABCABC
+ 0: ABCABC
+ 1: ABC
+
+/a(?!b)./
+ abad
+ 0: ad
+
+/a(?=d)./
+ abad
+ 0: ad
+
+/a(?=c|d)./
+ abad
+ 0: ad
+
+/a(?:b|c|d)(.)/
+ ace
+ 0: ace
+ 1: e
+
+/a(?:b|c|d)*(.)/
+ ace
+ 0: ace
+ 1: e
+
+/a(?:b|c|d)+?(.)/
+ ace
+ 0: ace
+ 1: e
+ acdbcdbe
+ 0: acd
+ 1: d
+
+/a(?:b|c|d)+(.)/
+ acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){2}(.)/
+ acdbcdbe
+ 0: acdb
+ 1: b
+
+/a(?:b|c|d){4,5}(.)/
+ acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|c|d){4,5}?(.)/
+ acdbcdbe
+ 0: acdbcd
+ 1: d
+
+/((foo)|(bar))*/
+ foobar
+ 0: foobar
+ 1: bar
+ 2: foo
+ 3: bar
+
+/a(?:b|c|d){6,7}(.)/
+ acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){6,7}?(.)/
+ acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,6}(.)/
+ acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,6}?(.)/
+ acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|c|d){5,7}(.)/
+ acdbcdbe
+ 0: acdbcdbe
+ 1: e
+
+/a(?:b|c|d){5,7}?(.)/
+ acdbcdbe
+ 0: acdbcdb
+ 1: b
+
+/a(?:b|(c|e){1,2}?|d)+?(.)/
+ ace
+ 0: ace
+ 1: c
+ 2: e
+
+/^(.+)?B/
+ AB
+ 0: AB
+ 1: A
+
+/^([^a-z])|(\^)$/
+ .
+ 0: .
+ 1: .
+
+/^[<>]&/
+ <&OUT
+ 0: <&
+
+/^(a\1?){4}$/
+ aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+\= Expect no match
+ AB
+No match
+ aaaaaaaaa
+No match
+ aaaaaaaaaaa
+No match
+
+/^(a(?(1)\1)){4}$/
+ aaaaaaaaaa
+ 0: aaaaaaaaaa
+ 1: aaaa
+\= Expect no match
+ aaaaaaaaa
+No match
+ aaaaaaaaaaa
+No match
+
+/(?:(f)(o)(o)|(b)(a)(r))*/
+ foobar
+ 0: foobar
+ 1: f
+ 2: o
+ 3: o
+ 4: b
+ 5: a
+ 6: r
+
+/(?<=a)b/
+ ab
+ 0: b
+\= Expect no match
+ cb
+No match
+ b
+No match
+
+/(?<!c)b/
+ ab
+ 0: b
+ b
+ 0: b
+ b
+ 0: b
+
+/(?:..)*a/
+ aba
+ 0: aba
+
+/(?:..)*?a/
+ aba
+ 0: a
+
+/^(?:b|a(?=(.)))*\1/
+ abc
+ 0: ab
+ 1: b
+
+/^(){3,5}/
+ abc
+ 0:
+ 1:
+
+/^(a+)*ax/
+ aax
+ 0: aax
+ 1: a
+
+/^((a|b)+)*ax/
+ aax
+ 0: aax
+ 1: a
+ 2: a
+
+/^((a|bc)+)*ax/
+ aax
+ 0: aax
+ 1: a
+ 2: a
+
+/(a|x)*ab/
+ cab
+ 0: ab
+
+/(a)*ab/
+ cab
+ 0: ab
+
+/(?:(?i)a)b/
+ ab
+ 0: ab
+
+/((?i)a)b/
+ ab
+ 0: ab
+ 1: a
+
+/(?:(?i)a)b/
+ Ab
+ 0: Ab
+
+/((?i)a)b/
+ Ab
+ 0: Ab
+ 1: A
+
+/(?:(?i)a)b/
+\= Expect no match
+ cb
+No match
+ aB
+No match
+
+/((?i)a)b/
+
+/(?i:a)b/
+ ab
+ 0: ab
+
+/((?i:a))b/
+ ab
+ 0: ab
+ 1: a
+
+/(?i:a)b/
+ Ab
+ 0: Ab
+
+/((?i:a))b/
+ Ab
+ 0: Ab
+ 1: A
+
+/(?i:a)b/
+\= Expect no match
+ aB
+No match
+ aB
+No match
+
+/((?i:a))b/
+
+/(?:(?-i)a)b/i
+ ab
+ 0: ab
+
+/((?-i)a)b/i
+ ab
+ 0: ab
+ 1: a
+
+/(?:(?-i)a)b/i
+ aB
+ 0: aB
+
+/((?-i)a)b/i
+ aB
+ 0: aB
+ 1: a
+
+/(?:(?-i)a)b/i
+ aB
+ 0: aB
+\= Expect no match
+ Ab
+No match
+ AB
+No match
+
+/(?-i:a)b/i
+ ab
+ 0: ab
+
+/((?-i:a))b/i
+ ab
+ 0: ab
+ 1: a
+
+/(?-i:a)b/i
+ aB
+ 0: aB
+
+/((?-i:a))b/i
+ aB
+ 0: aB
+ 1: a
+
+/(?-i:a)b/i
+\= Expect no match
+ AB
+No match
+ Ab
+No match
+
+/((?-i:a))b/i
+
+/(?-i:a)b/i
+ aB
+ 0: aB
+
+/((?-i:a))b/i
+ aB
+ 0: aB
+ 1: a
+
+/(?-i:a)b/i
+\= Expect no match
+ Ab
+No match
+ AB
+No match
+
+/((?-i:a))b/i
+
+/((?-i:a.))b/i
+\= Expect no match
+ AB
+No match
+ a\nB
+No match
+
+/((?s-i:a.))b/i
+ a\nB
+ 0: a\x0aB
+ 1: a\x0a
+
+/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
+ cabbbb
+ 0: cabbbb
+
+/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
+ caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+ 0: caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+
+/(ab)\d\1/i
+ Ab4ab
+ 0: Ab4ab
+ 1: Ab
+ ab4Ab
+ 0: ab4Ab
+ 1: ab
+
+/foo\w*\d{4}baz/
+ foobar1234baz
+ 0: foobar1234baz
+
+/x(~~)*(?:(?:F)?)?/
+ x~~
+ 0: x~~
+ 1: ~~
+
+/^a(?#xxx){3}c/
+ aaac
+ 0: aaac
+
+/^a (?#xxx) (?#yyy) {3}c/x
+ aaac
+ 0: aaac
+
+/(?<![cd])b/
+\= Expect no match
+ B\nB
+No match
+ dbcb
+No match
+
+/(?<![cd])[ab]/
+ dbaacb
+ 0: a
+
+/(?<!(c|d))b/
+
+/(?<!(c|d))[ab]/
+ dbaacb
+ 0: a
+
+/(?<!cd)[ab]/
+ cdaccb
+ 0: b
+
+/^(?:a?b?)*$/
+ \
+ 0:
+ a
+ 0: a
+ ab
+ 0: ab
+ aaa
+ 0: aaa
+\= Expect no match
+ dbcb
+No match
+ a--
+No match
+ aa--
+No match
+
+/((?s)^a(.))((?m)^b$)/
+ a\nb\nc\n
+ 0: a\x0ab
+ 1: a\x0a
+ 2: \x0a
+ 3: b
+
+/((?m)^b$)/
+ a\nb\nc\n
+ 0: b
+ 1: b
+
+/(?m)^b/
+ a\nb\n
+ 0: b
+
+/(?m)^(b)/
+ a\nb\n
+ 0: b
+ 1: b
+
+/((?m)^b)/
+ a\nb\n
+ 0: b
+ 1: b
+
+/\n((?m)^b)/
+ a\nb\n
+ 0: \x0ab
+ 1: b
+
+/((?s).)c(?!.)/
+ a\nb\nc\n
+ 0: \x0ac
+ 1: \x0a
+ a\nb\nc\n
+ 0: \x0ac
+ 1: \x0a
+
+/((?s)b.)c(?!.)/
+ a\nb\nc\n
+ 0: b\x0ac
+ 1: b\x0a
+ a\nb\nc\n
+ 0: b\x0ac
+ 1: b\x0a
+
+/^b/
+
+/()^b/
+\= Expect no match
+ a\nb\nc\n
+No match
+ a\nb\nc\n
+No match
+
+/((?m)^b)/
+ a\nb\nc\n
+ 0: b
+ 1: b
+
+/(x)?(?(1)a|b)/
+\= Expect no match
+ a
+No match
+ a
+No match
+
+/(x)?(?(1)b|a)/
+ a
+ 0: a
+
+/()?(?(1)b|a)/
+ a
+ 0: a
+
+/()(?(1)b|a)/
+
+/()?(?(1)a|b)/
+ a
+ 0: a
+ 1:
+
+/^(\()?blah(?(1)(\)))$/
+ (blah)
+ 0: (blah)
+ 1: (
+ 2: )
+ blah
+ 0: blah
+\= Expect no match
+ a
+No match
+ blah)
+No match
+ (blah
+No match
+
+/^(\(+)?blah(?(1)(\)))$/
+ (blah)
+ 0: (blah)
+ 1: (
+ 2: )
+ blah
+ 0: blah
+\= Expect no match
+ blah)
+No match
+ (blah
+No match
+
+/(?(?!a)a|b)/
+
+/(?(?!a)b|a)/
+ a
+ 0: a
+
+/(?(?=a)b|a)/
+\= Expect no match
+ a
+No match
+ a
+No match
+
+/(?(?=a)a|b)/
+ a
+ 0: a
+
+/(?=(a+?))(\1ab)/
+ aaab
+ 0: aab
+ 1: a
+ 2: aab
+
+/^(?=(a+?))\1ab/
+
+/(\w+:)+/
+ one:
+ 0: one:
+ 1: one:
+
+/$(?<=^(a))/
+ a
+ 0:
+ 1: a
+
+/(?=(a+?))(\1ab)/
+ aaab
+ 0: aab
+ 1: a
+ 2: aab
+
+/^(?=(a+?))\1ab/
+\= Expect no match
+ aaab
+No match
+ aaab
+No match
+
+/([\w:]+::)?(\w+)$/
+ abcd
+ 0: abcd
+ 1: <unset>
+ 2: abcd
+ xy:z:::abcd
+ 0: xy:z:::abcd
+ 1: xy:z:::
+ 2: abcd
+
+/^[^bcd]*(c+)/
+ aexycd
+ 0: aexyc
+ 1: c
+
+/(a*)b+/
+ caab
+ 0: aab
+ 1: aa
+
+/([\w:]+::)?(\w+)$/
+ abcd
+ 0: abcd
+ 1: <unset>
+ 2: abcd
+ xy:z:::abcd
+ 0: xy:z:::abcd
+ 1: xy:z:::
+ 2: abcd
+\= Expect no match
+ abcd:
+No match
+ abcd:
+No match
+
+/^[^bcd]*(c+)/
+ aexycd
+ 0: aexyc
+ 1: c
+
+/(>a+)ab/
+
+/(?>a+)b/
+ aaab
+ 0: aaab
+
+/([[:]+)/
+ a:[b]:
+ 0: :[
+ 1: :[
+
+/([[=]+)/
+ a=[b]=
+ 0: =[
+ 1: =[
+
+/([[.]+)/
+ a.[b].
+ 0: .[
+ 1: .[
+
+/((?>a+)b)/
+ aaab
+ 0: aaab
+ 1: aaab
+
+/(?>(a+))b/
+ aaab
+ 0: aaab
+ 1: aaa
+
+/((?>[^()]+)|\([^()]*\))+/
+ ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+
+/a\Z/
+\= Expect no match
+ aaab
+No match
+ a\nb\n
+No match
+
+/b\Z/
+ a\nb\n
+ 0: b
+
+/b\z/
+
+/b\Z/
+ a\nb
+ 0: b
+
+/b\z/
+ a\nb
+ 0: b
+
+/^(?>(?(1)\.|())[^\W_](?>[a-z0-9-]*[^\W_])?)+$/
+ a
+ 0: a
+ 1:
+ abc
+ 0: abc
+ 1:
+ a-b
+ 0: a-b
+ 1:
+ 0-9
+ 0: 0-9
+ 1:
+ a.b
+ 0: a.b
+ 1:
+ 5.6.7
+ 0: 5.6.7
+ 1:
+ the.quick.brown.fox
+ 0: the.quick.brown.fox
+ 1:
+ a100.b200.300c
+ 0: a100.b200.300c
+ 1:
+ 12-ab.1245
+ 0: 12-ab.1245
+ 1:
+\= Expect no match
+ \
+No match
+ .a
+No match
+ -a
+No match
+ a-
+No match
+ a.
+No match
+ a_b
+No match
+ a.-
+No match
+ a..
+No match
+ ab..bc
+No match
+ the.quick.brown.fox-
+No match
+ the.quick.brown.fox.
+No match
+ the.quick.brown.fox_
+No match
+ the.quick.brown.fox+
+No match
+
+/(?>.*)(?<=(abcd|wxyz))/
+ alphabetabcd
+ 0: alphabetabcd
+ 1: abcd
+ endingwxyz
+ 0: endingwxyz
+ 1: wxyz
+\= Expect no match
+ a rather long string that doesn't end with one of them
+No match
+
+/word (?>(?:(?!otherword)[a-zA-Z0-9]+ ){0,30})otherword/
+ word cat dog elephant mussel cow horse canary baboon snake shark otherword
+ 0: 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
+No match
+
+/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
+No match
+
+/(?<=\d{3}(?!999))foo/
+ 999foo
+ 0: foo
+ 123999foo
+ 0: foo
+\= Expect no match
+ 123abcfoo
+No match
+
+/(?<=(?!...999)\d{3})foo/
+ 999foo
+ 0: foo
+ 123999foo
+ 0: foo
+\= Expect no match
+ 123abcfoo
+No match
+
+/(?<=\d{3}(?!999)...)foo/
+ 123abcfoo
+ 0: foo
+ 123456foo
+ 0: foo
+\= Expect no match
+ 123999foo
+No match
+
+/(?<=\d{3}...)(?<!999)foo/
+ 123abcfoo
+ 0: foo
+ 123456foo
+ 0: foo
+\= Expect no match
+ 123999foo
+No match
+
+/<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
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+ <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+ <a href=\'abcd xyz pqr\' cats
+ 0: <a href='abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/<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
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+ <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+ <a href = \'abcd xyz pqr\' cats
+ 0: <a href = 'abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/<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
+ 0: <a href=abcd
+ 1: <unset>
+ 2: <unset>
+ 3: abcd
+ <a href=\"abcd xyz pqr\" cats
+ 0: <a href="abcd xyz pqr"
+ 1: "
+ 2: abcd xyz pqr
+ <a href = \'abcd xyz pqr\' cats
+ 0: <a href = 'abcd xyz pqr'
+ 1: '
+ 2: abcd xyz pqr
+
+/((Z)+|A)*/
+ ZABCDEFG
+ 0: ZA
+ 1: A
+ 2: Z
+
+/(Z()|A)*/
+ ZABCDEFG
+ 0: ZA
+ 1: A
+ 2:
+
+/(Z(())|A)*/
+ ZABCDEFG
+ 0: ZA
+ 1: A
+ 2:
+ 3:
+
+/((?>Z)+|A)*/
+ ZABCDEFG
+ 0: ZA
+ 1: A
+
+/((?>)+|A)*/
+ ZABCDEFG
+ 0:
+ 1:
+
+/a*/g
+ abbab
+ 0: a
+ 0:
+ 0:
+ 0: a
+ 0:
+ 0:
+
+/[[:space:]]+/
+ > \x09\x0a\x0c\x0d\x0b<
+ 0: \x09\x0a\x0c\x0d\x0b
+
+/[[:blank:]]+/
+ > \x09\x0a\x0c\x0d\x0b<
+ 0: \x09
+
+/[\s]+/
+ > \x09\x0a\x0c\x0d\x0b<
+ 0: \x09\x0a\x0c\x0d\x0b
+
+/\s+/
+ > \x09\x0a\x0c\x0d\x0b<
+ 0: \x09\x0a\x0c\x0d\x0b
+
+/a\vb/x
+ ab
+ 0: ab
+
+/(?!\A)x/m
+ a\nxb\n
+ 0: x
+
+/(?!^)x/m
+\= Expect no match
+ a\nxb\n
+No match
+
+/abc\Qabc\Eabc/
+ abcabcabc
+ 0: abcabcabc
+
+/abc\Q(*+|\Eabc/
+ abc(*+|abc
+ 0: abc(*+|abc
+
+/ abc\Q abc\Eabc/x
+ abc abcabc
+ 0: abc abcabc
+\= Expect no match
+ abcabcabc
+No match
+
+/abc#comment
+ \Q#not comment
+ literal\E/x
+ abc#not comment\n literal
+ 0: abc#not comment\x0a literal
+
+/abc#comment
+ \Q#not comment
+ literal/x
+ abc#not comment\n literal
+ 0: abc#not comment\x0a literal
+
+/abc#comment
+ \Q#not comment
+ literal\E #more comment
+ /x
+ abc#not comment\n literal
+ 0: abc#not comment\x0a literal
+
+/abc#comment
+ \Q#not comment
+ literal\E #more comment/x
+ abc#not comment\n literal
+ 0: abc#not comment\x0a literal
+
+/\Qabc\$xyz\E/
+ abc\\\$xyz
+ 0: abc\$xyz
+
+/\Qabc\E\$\Qxyz\E/
+ abc\$xyz
+ 0: abc$xyz
+
+/\Gabc/
+ abc
+ 0: abc
+\= Expect no match
+ xyzabc
+No match
+
+/\Gabc./g
+ abc1abc2xyzabc3
+ 0: abc1
+ 0: abc2
+
+/abc./g
+ abc1abc2xyzabc3
+ 0: abc1
+ 0: abc2
+ 0: abc3
+
+/a(?x: b c )d/
+ XabcdY
+ 0: abcd
+\= Expect no match
+ Xa b c d Y
+No match
+
+/((?x)x y z | a b c)/
+ XabcY
+ 0: abc
+ 1: abc
+ AxyzB
+ 0: xyz
+ 1: xyz
+
+/(?i)AB(?-i)C/
+ XabCY
+ 0: abC
+\= Expect no match
+ XabcY
+No match
+
+/((?i)AB(?-i)C|D)E/
+ abCE
+ 0: abCE
+ 1: abC
+ DE
+ 0: DE
+ 1: D
+\= Expect no match
+ abcE
+No match
+ abCe
+No match
+ dE
+No match
+ De
+No match
+
+/(.*)\d+\1/
+ abc123abc
+ 0: abc123abc
+ 1: abc
+ abc123bc
+ 0: bc123bc
+ 1: bc
+
+/(.*)\d+\1/s
+ abc123abc
+ 0: abc123abc
+ 1: abc
+ abc123bc
+ 0: bc123bc
+ 1: bc
+
+/((.*))\d+\1/
+ abc123abc
+ 0: abc123abc
+ 1: abc
+ 2: abc
+ abc123bc
+ 0: bc123bc
+ 1: bc
+ 2: bc
+
+# 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
+ 0: a123::a123
+ 1:
+ a123:b342::abcd
+ 0: a123:b342::abcd
+ 1:
+ a123:b342::324e:abcd
+ 0: a123:b342::324e:abcd
+ 1:
+ a123:ddde:b342::324e:abcd
+ 0: a123:ddde:b342::324e:abcd
+ 1:
+ a123:ddde:b342::324e:dcba:abcd
+ 0: a123:ddde:b342::324e:dcba:abcd
+ 1:
+ a123:ddde:9999:b342::324e:dcba:abcd
+ 0: a123:ddde:9999:b342::324e:dcba:abcd
+ 1:
+\= Expect no match
+ 1:2:3:4:5:6:7:8
+No match
+ a123:bce:ddde:9999:b342::324e:dcba:abcd
+No match
+ a123::9999:b342::324e:dcba:abcd
+No match
+ abcde:2:3:4:5:6:7:8
+No match
+ ::1
+No match
+ abcd:fee0:123::
+No match
+ :1
+No match
+ 1:
+No match
+
+/[z\Qa-d]\E]/
+ z
+ 0: z
+ a
+ 0: a
+ -
+ 0: -
+ d
+ 0: d
+ ]
+ 0: ]
+\= Expect no match
+ b
+No match
+
+/(a+)*b/
+\= Expect no match
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/(?i)reg(?:ul(?:[aä]|ae)r|ex)/
+ REGular
+ 0: REGular
+ regulaer
+ 0: regulaer
+ Regex
+ 0: Regex
+ regulär
+ 0: regul\xe4r
+
+/Åæåä[à-ÿÀ-ß]+/
+ Åæåäà
+ 0: \xc5\xe6\xe5\xe4\xe0
+ Åæåäÿ
+ 0: \xc5\xe6\xe5\xe4\xff
+ ÅæåäÀ
+ 0: \xc5\xe6\xe5\xe4\xc0
+ Åæåäß
+ 0: \xc5\xe6\xe5\xe4\xdf
+
+/(?<=Z)X./
+ \x84XAZXB
+ 0: XB
+
+/ab cd (?x) de fg/
+ ab cd defg
+ 0: ab cd defg
+
+/ab cd(?x) de fg/
+ ab cddefg
+ 0: ab cddefg
+\= Expect no match
+ abcddefg
+No match
+
+/(?<![^f]oo)(bar)/
+ foobarX
+ 0: bar
+ 1: bar
+\= Expect no match
+ boobarX
+No match
+
+/(?<![^f])X/
+ offX
+ 0: X
+\= Expect no match
+ onyX
+No match
+
+/(?<=[^f])X/
+ onyX
+ 0: X
+\= Expect no match
+ offX
+No match
+
+/^/gm
+ a\nb\nc\n
+ 0:
+ 0:
+ 0:
+ \
+ 0:
+
+/(?<=C\n)^/gm
+ A\nC\nC\n
+ 0:
+
+/(?:(?(1)a|b)(X))+/
+ bXaX
+ 0: bXaX
+ 1: X
+
+/(?:(?(1)\1a|b)(X|Y))+/
+ bXXaYYaY
+ 0: bXXaYYaY
+ 1: Y
+ bXYaXXaX
+ 0: bX
+ 1: X
+
+/()()()()()()()()()(?:(?(10)\10a|b)(X|Y))+/
+ bXXaYYaY
+ 0: bX
+ 1:
+ 2:
+ 3:
+ 4:
+ 5:
+ 6:
+ 7:
+ 8:
+ 9:
+10: X
+
+/[[,abc,]+]/
+ abc]
+ 0: abc]
+ a,b]
+ 0: a,b]
+ [a,b,c]
+ 0: [a,b,c]
+
+/(?-x: )/x
+ A\x20B
+ 0:
+
+"(?x)(?-x: \s*#\s*)"
+ A # B
+ 0: #
+\= Expect no match
+ #
+No match
+
+"(?x-is)(?:(?-ixs) \s*#\s*) include"
+ A #include
+ 0: #include
+\= Expect no match
+ A#include
+No match
+ A #Include
+No match
+
+/a*b*\w/
+ aaabbbb
+ 0: aaabbbb
+ aaaa
+ 0: aaaa
+ a
+ 0: a
+
+/a*b?\w/
+ aaabbbb
+ 0: aaabb
+ aaaa
+ 0: aaaa
+ a
+ 0: a
+
+/a*b{0,4}\w/
+ aaabbbb
+ 0: aaabbbb
+ aaaa
+ 0: aaaa
+ a
+ 0: a
+
+/a*b{0,}\w/
+ aaabbbb
+ 0: aaabbbb
+ aaaa
+ 0: aaaa
+ a
+ 0: a
+
+/a*\d*\w/
+ 0a
+ 0: 0a
+ a
+ 0: a
+
+/a*b *\w/x
+ a
+ 0: a
+
+/a*b#comment
+ *\w/x
+ a
+ 0: a
+
+/a* b *\w/x
+ a
+ 0: a
+
+/^\w+=.*(\\\n.*)*/
+ abc=xyz\\\npqr
+ 0: abc=xyz\
+
+/(?=(\w+))\1:/
+ abcd:
+ 0: abcd:
+ 1: abcd
+
+/^(?=(\w+))\1:/
+ abcd:
+ 0: abcd:
+ 1: abcd
+
+/^\Eabc/
+ abc
+ 0: abc
+
+/^[\Eabc]/
+ a
+ 0: a
+\= Expect no match
+ E
+No match
+
+/^[a-\Ec]/
+ b
+ 0: b
+\= Expect no match
+ -
+No match
+ E
+No match
+
+/^[a\E\E-\Ec]/
+ b
+ 0: b
+\= Expect no match
+ -
+No match
+ E
+No match
+
+/^[\E\Qa\E-\Qz\E]+/
+ b
+ 0: b
+\= Expect no match
+ -
+No match
+
+/^[a\Q]bc\E]/
+ a
+ 0: a
+ ]
+ 0: ]
+ c
+ 0: c
+
+/^[a-\Q\E]/
+ a
+ 0: a
+ -
+ 0: -
+
+/^(a()*)*/
+ aaaa
+ 0: aaaa
+ 1: a
+ 2:
+
+/^(?:a(?:(?:))*)*/
+ aaaa
+ 0: aaaa
+
+/^(a()+)+/
+ aaaa
+ 0: aaaa
+ 1: a
+ 2:
+
+/^(?:a(?:(?:))+)+/
+ aaaa
+ 0: aaaa
+
+/(a){0,3}(?(1)b|(c|))*D/
+ abbD
+ 0: abbD
+ 1: a
+ ccccD
+ 0: ccccD
+ 1: <unset>
+ 2:
+ D
+ 0: D
+ 1: <unset>
+ 2:
+
+/(a|)*\d/
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+ 1:
+\= Expect no match
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/(?>a|)*\d/
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+\= Expect no match
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/(?:a|)*\d/
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+ 0: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
+\= Expect no match
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/\Z/g
+ abc\n
+ 0:
+ 0:
+
+/^(?s)(?>.*)(?<!\n)/
+ abc
+ 0: abc
+\= Expect no match
+ abc\n
+No match
+
+/^(?![^\n]*\n\z)/
+ abc
+ 0:
+\= Expect no match
+ abc\n
+No match
+
+/\z(?<!\n)/
+ abc
+ 0:
+\= Expect no match
+ abc\n
+No match
+
+/(.*(.)?)*/
+ abcd
+ 0: abcd
+ 1:
+
+/( (A | (?(1)0|) )* )/x
+ abcd
+ 0:
+ 1:
+ 2:
+
+/( ( (?(1)0|) )* )/x
+ abcd
+ 0:
+ 1:
+ 2:
+
+/( (?(1)0|)* )/x
+ abcd
+ 0:
+ 1:
+
+/[[:abcd:xyz]]/
+ a]
+ 0: a]
+ :]
+ 0: :]
+
+/[abc[:x\]pqr]/
+ a
+ 0: a
+ [
+ 0: [
+ :
+ 0: :
+ ]
+ 0: ]
+ p
+ 0: p
+
+/.*[op][xyz]/
+\= Expect no match
+ fooabcfoo
+No match
+
+/(?(?=.*b)b|^)/
+ adc
+ 0:
+ abc
+ 0: b
+
+/(?(?=^.*b)b|^)/
+ adc
+ 0:
+\= Expect no match
+ abc
+No match
+
+/(?(?=.*b)b|^)*/
+ adc
+ 0:
+ abc
+ 0:
+
+/(?(?=.*b)b|^)+/
+ adc
+ 0:
+ abc
+ 0: b
+
+/(?(?=b).*b|^d)/
+ abc
+ 0: b
+
+/(?(?=.*b).*b|^d)/
+ abc
+ 0: ab
+
+/^%((?(?=[a])[^%])|b)*%$/
+ %ab%
+ 0: %ab%
+ 1:
+
+/(?i)a(?-i)b|c/
+ XabX
+ 0: ab
+ XAbX
+ 0: Ab
+ CcC
+ 0: c
+\= Expect no match
+ XABX
+No match
+
+/[\x00-\xff\s]+/
+ \x0a\x0b\x0c\x0d
+ 0: \x0a\x0b\x0c\x0d
+
+/(abc)\1/i
+\= Expect no match
+ abc
+No match
+
+/(abc)\1/
+\= Expect no match
+ abc
+No match
+
+/[^a]*/i
+ 12abc
+ 0: 12
+ 12ABC
+ 0: 12
+
+/[^a]*+/i
+ 12abc
+ 0: 12
+ 12ABC
+ 0: 12
+
+/[^a]*?X/i
+\= Expect no match
+ 12abc
+No match
+ 12ABC
+No match
+
+/[^a]+?X/i
+\= Expect no match
+ 12abc
+No match
+ 12ABC
+No match
+
+/[^a]?X/i
+ 12aXbcX
+ 0: X
+ 12AXBCX
+ 0: X
+ BCX
+ 0: CX
+
+/[^a]??X/i
+ 12aXbcX
+ 0: X
+ 12AXBCX
+ 0: X
+ BCX
+ 0: CX
+
+/[^a]?+X/i
+ 12aXbcX
+ 0: cX
+ 12AXBCX
+ 0: CX
+ BCX
+ 0: CX
+
+/[^a]{2,3}/i
+ abcdef
+ 0: bcd
+ ABCDEF
+ 0: BCD
+
+/[^a]{2,3}?/i
+ abcdef
+ 0: bc
+ ABCDEF
+ 0: BC
+
+/[^a]{2,3}+/i
+ abcdef
+ 0: bcd
+ ABCDEF
+ 0: BCD
+
+/((a|)+)+Z/
+ Z
+ 0: Z
+ 1:
+ 2:
+
+/(a)b|(a)c/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+
+/(?>(a))b|(a)c/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+
+/(?=(a))ab|(a)c/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+
+/((?>(a))b|(a)c)/
+ ac
+ 0: ac
+ 1: ac
+ 2: <unset>
+ 3: a
+
+/((?>(a))b|(a)c)++/
+ ac
+ 0: ac
+ 1: ac
+ 2: <unset>
+ 3: a
+
+/(?:(?>(a))b|(a)c)++/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+
+/(?=(?>(a))b|(a)c)(..)/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+ 3: ac
+
+/(?>(?>(a))b|(a)c)/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: a
+
+/(?:(?>([ab])))+a=/aftertext
+ =ba=
+ 0: ba=
+ 0+
+ 1: b
+
+/(?>([ab]))+a=/aftertext
+ =ba=
+ 0: ba=
+ 0+
+ 1: b
+
+/((?>(a+)b)+(aabab))/
+ aaaabaaabaabab
+ 0: aaaabaaabaabab
+ 1: aaaabaaabaabab
+ 2: aaa
+ 3: aabab
+
+/(?>a+|ab)+?c/
+\= Expect no match
+ aabc
+No match
+
+/(?>a+|ab)+c/
+\= Expect no match
+ aabc
+No match
+
+/(?:a+|ab)+c/
+ aabc
+ 0: aabc
+
+/(?(?=(a))a)/
+ a
+ 0: a
+ 1: a
+
+/(?(?=(a))a)(b)/
+ ab
+ 0: ab
+ 1: a
+ 2: b
+
+/^(?:a|ab)++c/
+\= Expect no match
+ aaaabc
+No match
+
+/^(?>a|ab)++c/
+\= Expect no match
+ aaaabc
+No match
+
+/^(?:a|ab)+c/
+ aaaabc
+ 0: aaaabc
+
+/(?=abc){3}abc/aftertext
+ abcabcabc
+ 0: abc
+ 0+ abcabc
+\= Expect no match
+ xyz
+No match
+
+/(?=abc)+abc/aftertext
+ abcabcabc
+ 0: abc
+ 0+ abcabc
+\= Expect no match
+ xyz
+No match
+
+/(?=abc)++abc/aftertext
+ abcabcabc
+ 0: abc
+ 0+ abcabc
+\= Expect no match
+ xyz
+No match
+
+/(?=abc){0}xyz/
+ xyz
+ 0: xyz
+
+/(?=abc){1}xyz/
+\= Expect no match
+ xyz
+No match
+
+/(?=(a))?./
+ ab
+ 0: a
+ 1: a
+ bc
+ 0: b
+
+/(?=(a))??./
+ ab
+ 0: a
+ bc
+ 0: b
+
+/^(?=(?1))?[az]([abc])d/
+ abd
+ 0: abd
+ 1: b
+ zcdxx
+ 0: zcd
+ 1: c
+
+/^(?!a){0}\w+/
+ aaaaa
+ 0: aaaaa
+
+/(?<=(abc))?xyz/
+ abcxyz
+ 0: xyz
+ 1: abc
+ pqrxyz
+ 0: xyz
+
+/^[\g<a>]+/
+ ggg<<<aaa>>>
+ 0: ggg<<<aaa>>>
+\= Expect no match
+ \\ga
+No match
+
+/^[\ga]+/
+ gggagagaxyz
+ 0: gggagaga
+
+/^[:a[:digit:]]+/
+ aaaa444:::Z
+ 0: aaaa444:::
+
+/^[:a[:digit:]:b]+/
+ aaaa444:::bbbZ
+ 0: aaaa444:::bbb
+
+/[:a]xxx[b:]/
+ :xxx:
+ 0: :xxx:
+
+/(?<=a{2})b/i
+ xaabc
+ 0: b
+\= Expect no match
+ xabc
+No match
+
+/(?<!a{2})b/i
+ xabc
+ 0: b
+\= Expect no match
+ xaabc
+No match
+
+/(?<=a\h)c/
+ xa c
+ 0: c
+
+/(?<=[^a]{2})b/
+ axxbc
+ 0: b
+ aAAbc
+ 0: b
+\= Expect no match
+ xaabc
+No match
+
+/(?<=[^a]{2})b/i
+ axxbc
+ 0: b
+\= Expect no match
+ aAAbc
+No match
+ xaabc
+No match
+
+/(?<=a\H)c/
+ abc
+ 0: c
+
+/(?<=a\V)c/
+ abc
+ 0: c
+
+/(?<=a\v)c/
+ a\nc
+ 0: c
+
+/(?(?=c)c|d)++Y/
+ XcccddYX
+ 0: cccddY
+
+/(?(?=c)c|d)*+Y/
+ XcccddYX
+ 0: cccddY
+
+/^(a{2,3}){2,}+a/
+ aaaaaaa
+ 0: aaaaaaa
+ 1: aaa
+\= Expect no match
+ aaaaaa
+No match
+ aaaaaaaaa
+No match
+
+/^(a{2,3})++a/
+\= Expect no match
+ aaaaaa
+No match
+
+/^(a{2,3})*+a/
+\= Expect no match
+ aaaaaa
+No match
+
+/\H\h\V\v/
+ X X\x0a
+ 0: X X\x0a
+ X\x09X\x0b
+ 0: X\x09X\x0b
+\= Expect no match
+ \xa0 X\x0a
+No match
+
+/\H*\h+\V?\v{3,4}/
+ \x09\x20\xa0X\x0a\x0b\x0c\x0d\x0a
+ 0: \x09 \xa0X\x0a\x0b\x0c\x0d
+ \x09\x20\xa0\x0a\x0b\x0c\x0d\x0a
+ 0: \x09 \xa0\x0a\x0b\x0c\x0d
+ \x09\x20\xa0\x0a\x0b\x0c
+ 0: \x09 \xa0\x0a\x0b\x0c
+\= Expect no match
+ \x09\x20\xa0\x0a\x0b
+No match
+
+/\H{3,4}/
+ XY ABCDE
+ 0: ABCD
+ XY PQR ST
+ 0: PQR
+
+/.\h{3,4}./
+ XY AB PQRS
+ 0: B P
+
+/\h*X\h?\H+Y\H?Z/
+ >XNNNYZ
+ 0: XNNNYZ
+ > X NYQZ
+ 0: X NYQZ
+\= Expect no match
+ >XYZ
+No match
+ > X NY Z
+No match
+
+/\v*X\v?Y\v+Z\V*\x0a\V+\x0b\V{2,3}\x0c/
+ >XY\x0aZ\x0aA\x0bNN\x0c
+ 0: XY\x0aZ\x0aA\x0bNN\x0c
+ >\x0a\x0dX\x0aY\x0a\x0bZZZ\x0aAAA\x0bNNN\x0c
+ 0: \x0a\x0dX\x0aY\x0a\x0bZZZ\x0aAAA\x0bNNN\x0c
+
+/(foo)\Kbar/
+ foobar
+ 0: bar
+ 1: foo
+
+/(foo)(\Kbar|baz)/
+ foobar
+ 0: bar
+ 1: foo
+ 2: bar
+ foobaz
+ 0: foobaz
+ 1: foo
+ 2: baz
+
+/(foo\Kbar)baz/
+ foobarbaz
+ 0: barbaz
+ 1: foobar
+
+/abc\K|def\K/g,aftertext
+ Xabcdefghi
+ 0:
+ 0+ defghi
+ 0:
+ 0+ ghi
+
+/ab\Kc|de\Kf/g,aftertext
+ Xabcdefghi
+ 0: c
+ 0+ defghi
+ 0: f
+ 0+ ghi
+
+/(?=C)/g,aftertext
+ ABCDECBA
+ 0:
+ 0+ CDECBA
+ 0:
+ 0+ CBA
+
+/^abc\K/aftertext
+ abcdef
+ 0:
+ 0+ def
+\= Expect no match
+ defabcxyz
+No match
+
+/^(a(b))\1\g1\g{1}\g-1\g{-1}\g{-2}Z/
+ ababababbbabZXXXX
+ 0: ababababbbabZ
+ 1: ab
+ 2: b
+
+/(?<A>tom|bon)-\g{A}/
+ tom-tom
+ 0: tom-tom
+ 1: tom
+ bon-bon
+ 0: bon-bon
+ 1: bon
+
+/(^(a|b\g{-1}))/
+\= Expect no match
+ bacxxx
+No match
+
+/(?|(abc)|(xyz))\1/
+ abcabc
+ 0: abcabc
+ 1: abc
+ xyzxyz
+ 0: xyzxyz
+ 1: xyz
+\= Expect no match
+ abcxyz
+No match
+ xyzabc
+No match
+
+/(?|(abc)|(xyz))(?1)/
+ abcabc
+ 0: abcabc
+ 1: abc
+ xyzabc
+ 0: xyzabc
+ 1: xyz
+\= Expect no match
+ xyzxyz
+No match
+
+/^X(?5)(a)(?|(b)|(q))(c)(d)(Y)/
+ XYabcdY
+ 0: XYabcdY
+ 1: a
+ 2: b
+ 3: c
+ 4: d
+ 5: Y
+
+/^X(?7)(a)(?|(b|(r)(s))|(q))(c)(d)(Y)/
+ XYabcdY
+ 0: XYabcdY
+ 1: a
+ 2: b
+ 3: <unset>
+ 4: <unset>
+ 5: c
+ 6: d
+ 7: Y
+
+/^X(?7)(a)(?|(b|(?|(r)|(t))(s))|(q))(c)(d)(Y)/
+ XYabcdY
+ 0: XYabcdY
+ 1: a
+ 2: b
+ 3: <unset>
+ 4: <unset>
+ 5: c
+ 6: d
+ 7: Y
+
+/(?'abc'\w+):\k<abc>{2}/
+ a:aaxyz
+ 0: a:aa
+ 1: a
+ ab:ababxyz
+ 0: ab:abab
+ 1: ab
+\= Expect no match
+ a:axyz
+No match
+ ab:abxyz
+No match
+
+/(?'abc'\w+):\g{abc}{2}/
+ a:aaxyz
+ 0: a:aa
+ 1: a
+ ab:ababxyz
+ 0: ab:abab
+ 1: ab
+\= Expect no match
+ a:axyz
+No match
+ ab:abxyz
+No match
+
+/^(?<ab>a)? (?(<ab>)b|c) (?('ab')d|e)/x
+ abd
+ 0: abd
+ 1: a
+ ce
+ 0: ce
+
+/^(a.)\g-1Z/
+ aXaXZ
+ 0: aXaXZ
+ 1: aX
+
+/^(a.)\g{-1}Z/
+ aXaXZ
+ 0: aXaXZ
+ 1: aX
+
+/^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /x
+ abcd
+ 0: ab
+
+/(?<NAME>(?&NAME_PAT))\s+(?<ADDR>(?&ADDRESS_PAT))
+ (?(DEFINE)
+ (?<NAME_PAT>[a-z]+)
+ (?<ADDRESS_PAT>\d+)
+ )/x
+ metcalfe 33
+ 0: metcalfe 33
+ 1: metcalfe
+ 2: 33
+
+/(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
+ 1.2.3.4
+ 0: 1.2.3.4
+ 1: <unset>
+ 2: .4
+ 131.111.10.206
+ 0: 131.111.10.206
+ 1: <unset>
+ 2: .206
+ 10.0.0.0
+ 0: 10.0.0.0
+ 1: <unset>
+ 2: .0
+\= Expect no match
+ 10.6
+No match
+ 455.3.4.5
+No match
+
+/\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
+ 1.2.3.4
+ 0: 1.2.3.4
+ 1: .4
+ 131.111.10.206
+ 0: 131.111.10.206
+ 1: .206
+ 10.0.0.0
+ 0: 10.0.0.0
+ 1: .0
+\= Expect no match
+ 10.6
+No match
+ 455.3.4.5
+No match
+
+/^(\w++|\s++)*$/
+ now is the time for all good men to come to the aid of the party
+ 0: now is the time for all good men to come to the aid of the party
+ 1: party
+\= Expect no match
+ this is not a line with only words and spaces!
+No match
+
+/(\d++)(\w)/
+ 12345a
+ 0: 12345a
+ 1: 12345
+ 2: a
+\= Expect no match
+ 12345+
+No match
+
+/a++b/
+ aaab
+ 0: aaab
+
+/(a++b)/
+ aaab
+ 0: aaab
+ 1: aaab
+
+/(a++)b/
+ aaab
+ 0: aaab
+ 1: aaa
+
+/([^()]++|\([^()]*\))+/
+ ((abc(ade)ufh()()x
+ 0: abc(ade)ufh()()x
+ 1: x
+
+/\(([^()]++|\([^()]+\))+\)/
+ (abc)
+ 0: (abc)
+ 1: abc
+ (abc(def)xyz)
+ 0: (abc(def)xyz)
+ 1: xyz
+\= Expect no match
+ ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+No match
+
+/^([^()]|\((?1)*\))*$/
+ abc
+ 0: abc
+ 1: c
+ a(b)c
+ 0: a(b)c
+ 1: c
+ a(b(c))d
+ 0: a(b(c))d
+ 1: d
+\= Expect no match)
+ a(b(c)d
+No match
+
+/^>abc>([^()]|\((?1)*\))*<xyz<$/
+ >abc>123<xyz<
+ 0: >abc>123<xyz<
+ 1: 3
+ >abc>1(2)3<xyz<
+ 0: >abc>1(2)3<xyz<
+ 1: 3
+ >abc>(1(2)3)<xyz<
+ 0: >abc>(1(2)3)<xyz<
+ 1: (1(2)3)
+
+/^(?:((.)(?1)\2|)|((.)(?3)\4|.))$/i
+ 1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+ Satanoscillatemymetallicsonatas
+ 0: Satanoscillatemymetallicsonatas
+ 1: <unset>
+ 2: <unset>
+ 3: Satanoscillatemymetallicsonatas
+ 4: S
+ AmanaplanacanalPanama
+ 0: AmanaplanacanalPanama
+ 1: <unset>
+ 2: <unset>
+ 3: AmanaplanacanalPanama
+ 4: A
+ AblewasIereIsawElba
+ 0: AblewasIereIsawElba
+ 1: <unset>
+ 2: <unset>
+ 3: AblewasIereIsawElba
+ 4: A
+\= Expect no match
+ Thequickbrownfox
+No match
+
+/^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
+ 12
+ 0: 12
+ 1: 12
+ (((2+2)*-3)-7)
+ 0: (((2+2)*-3)-7)
+ 1: (((2+2)*-3)-7)
+ 2: -
+ -12
+ 0: -12
+ 1: -12
+\= Expect no match
+ ((2+2)*-3)-7)
+No match
+
+/^(x(y|(?1){2})z)/
+ xyz
+ 0: xyz
+ 1: xyz
+ 2: y
+ xxyzxyzz
+ 0: xxyzxyzz
+ 1: xxyzxyzz
+ 2: xyzxyz
+\= Expect no match
+ xxyzz
+No match
+ xxyzxyzxyzz
+No match
+
+/((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/x
+ <>
+ 0: <>
+ 1: <>
+ 2: <>
+ <abcd>
+ 0: <abcd>
+ 1: <abcd>
+ 2: <abcd>
+ <abc <123> hij>
+ 0: <abc <123> hij>
+ 1: <abc <123> hij>
+ 2: <abc <123> hij>
+ <abc <def> hij>
+ 0: <def>
+ 1: <def>
+ 2: <def>
+ <abc<>def>
+ 0: <abc<>def>
+ 1: <abc<>def>
+ 2: <abc<>def>
+ <abc<>
+ 0: <>
+ 1: <>
+ 2: <>
+\= Expect no match
+ <abc
+No match
+
+/^a+(*FAIL)/
+\= Expect no match
+ aaaaaa
+No match
+
+/a+b?c+(*FAIL)/
+\= Expect no match
+ aaabccc
+No match
+
+/a+b?(*PRUNE)c+(*FAIL)/
+\= Expect no match
+ aaabccc
+No match
+
+/a+b?(*COMMIT)c+(*FAIL)/
+\= Expect no match
+ aaabccc
+No match
+
+/a+b?(*SKIP)c+(*FAIL)/
+\= Expect no match
+ aaabcccaaabccc
+No match
+
+/^(?:aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
+ aaaxxxxxx
+ 0: aaaxxxxxx
+ aaa++++++
+ 0: aaa
+ bbbxxxxx
+ 0: bbbxxxxx
+ bbb+++++
+ 0: bbb
+ cccxxxx
+ 0: cccxxxx
+ ccc++++
+ 0: ccc
+ dddddddd
+ 0: ddd
+
+/^(aaa(*THEN)\w{6}|bbb(*THEN)\w{5}|ccc(*THEN)\w{4}|\w{3})/
+ aaaxxxxxx
+ 0: aaaxxxxxx
+ 1: aaaxxxxxx
+ aaa++++++
+ 0: aaa
+ 1: aaa
+ bbbxxxxx
+ 0: bbbxxxxx
+ 1: bbbxxxxx
+ bbb+++++
+ 0: bbb
+ 1: bbb
+ cccxxxx
+ 0: cccxxxx
+ 1: cccxxxx
+ ccc++++
+ 0: ccc
+ 1: ccc
+ dddddddd
+ 0: ddd
+ 1: ddd
+
+/a+b?(*THEN)c+(*FAIL)/
+\= Expect no match
+ aaabccc
+No match
+
+/(A (A|B(*ACCEPT)|C) D)(E)/x
+ AB
+ 0: AB
+ 1: AB
+ 2: B
+ ABX
+ 0: AB
+ 1: AB
+ 2: B
+ AADE
+ 0: AADE
+ 1: AAD
+ 2: A
+ 3: E
+ ACDE
+ 0: ACDE
+ 1: ACD
+ 2: C
+ 3: E
+\= Expect no match
+ AD
+No match
+
+/^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
+ 1221
+ 0: 1221
+ 1: 1221
+ 2: 1
+ Satan, oscillate my metallic sonatas!
+ 0: Satan, oscillate my metallic sonatas!
+ 1: <unset>
+ 2: <unset>
+ 3: Satan, oscillate my metallic sonatas
+ 4: S
+ A man, a plan, a canal: Panama!
+ 0: A man, a plan, a canal: Panama!
+ 1: <unset>
+ 2: <unset>
+ 3: A man, a plan, a canal: Panama
+ 4: A
+ Able was I ere I saw Elba.
+ 0: Able was I ere I saw Elba.
+ 1: <unset>
+ 2: <unset>
+ 3: Able was I ere I saw Elba
+ 4: A
+\= Expect no match
+ The quick brown fox
+No match
+
+/^((.)(?1)\2|.)$/
+ a
+ 0: a
+ 1: a
+ aba
+ 0: aba
+ 1: aba
+ 2: a
+ aabaa
+ 0: aabaa
+ 1: aabaa
+ 2: a
+ abcdcba
+ 0: abcdcba
+ 1: abcdcba
+ 2: a
+ pqaabaaqp
+ 0: pqaabaaqp
+ 1: pqaabaaqp
+ 2: p
+ ablewasiereisawelba
+ 0: ablewasiereisawelba
+ 1: ablewasiereisawelba
+ 2: a
+\= Expect no match
+ rhubarb
+No match
+ the quick brown fox
+No match
+
+/(a)(?<=b(?1))/
+ baz
+ 0: a
+ 1: a
+\= Expect no match
+ caz
+No match
+
+/(?<=b(?1))(a)/
+ zbaaz
+ 0: a
+ 1: a
+\= Expect no match
+ aaa
+No match
+
+/(?<X>a)(?<=b(?&X))/
+ baz
+ 0: a
+ 1: a
+
+/^(?|(abc)|(def))\1/
+ abcabc
+ 0: abcabc
+ 1: abc
+ defdef
+ 0: defdef
+ 1: def
+\= Expect no match
+ abcdef
+No match
+ defabc
+No match
+
+/^(?|(abc)|(def))(?1)/
+ abcabc
+ 0: abcabc
+ 1: abc
+ defabc
+ 0: defabc
+ 1: def
+\= Expect no match
+ defdef
+No match
+ abcdef
+No match
+
+/(?:a(?<quote> (?<apostrophe>')|(?<realquote>")) |b(?<quote> (?<apostrophe>')|(?<realquote>")) ) (?('quote')[a-z]+|[0-9]+)/x,dupnames
+ a\"aaaaa
+ 0: a"aaaaa
+ 1: "
+ 2: <unset>
+ 3: "
+ b\"aaaaa
+ 0: b"aaaaa
+ 1: <unset>
+ 2: <unset>
+ 3: <unset>
+ 4: "
+ 5: <unset>
+ 6: "
+\= Expect no match
+ b\"11111
+No match
+
+/(?:(?1)|B)(A(*F)|C)/
+ ABCD
+ 0: BC
+ 1: C
+ CCD
+ 0: CC
+ 1: C
+\= Expect no match
+ CAD
+No match
+
+/^(?:(?1)|B)(A(*F)|C)/
+ CCD
+ 0: CC
+ 1: C
+ BCD
+ 0: BC
+ 1: C
+\= Expect no match
+ ABCD
+No match
+ CAD
+No match
+ BAD
+No match
+
+/(?:(?1)|B)(A(*ACCEPT)XX|C)D/
+ AAD
+ 0: AA
+ 1: A
+ ACD
+ 0: ACD
+ 1: C
+ BAD
+ 0: BA
+ 1: A
+ BCD
+ 0: BCD
+ 1: C
+ BAX
+ 0: BA
+ 1: A
+\= Expect no match
+ ACX
+No match
+ ABC
+No match
+
+/(?(DEFINE)(A))B(?1)C/
+ BAC
+ 0: BAC
+
+/(?(DEFINE)((A)\2))B(?1)C/
+ BAAC
+ 0: BAAC
+
+/(?<pn> \( ( [^()]++ | (?&pn) )* \) )/x
+ (ab(cd)ef)
+ 0: (ab(cd)ef)
+ 1: (ab(cd)ef)
+ 2: ef
+
+/^(?=a(*SKIP)b|ac)/
+\= Expect no match
+ ac
+No match
+
+/^(?=a(*PRUNE)b)/
+ ab
+ 0:
+\= Expect no match
+ ac
+No match
+
+/^(?=a(*ACCEPT)b)/
+ ac
+ 0:
+
+/(?>a\Kb)/
+ ab
+ 0: b
+
+/((?>a\Kb))/
+ ab
+ 0: b
+ 1: ab
+
+/(a\Kb)/
+ ab
+ 0: b
+ 1: ab
+
+/^a\Kcz|ac/
+ ac
+ 0: ac
+
+/(?>a\Kbz|ab)/
+ ab
+ 0: ab
+
+/^(?&t)(?(DEFINE)(?<t>a\Kb))$/
+ ab
+ 0: b
+
+/^([^()]|\((?1)*\))*$/
+ a(b)c
+ 0: a(b)c
+ 1: c
+ a(b(c)d)e
+ 0: a(b(c)d)e
+ 1: e
+
+/(?P<L1>(?P<L2>0)(?P>L1)|(?P>L2))/
+ 0
+ 0: 0
+ 1: 0
+ 00
+ 0: 00
+ 1: 00
+ 2: 0
+ 0000
+ 0: 0000
+ 1: 0000
+ 2: 0
+
+/(?P<L1>(?P<L2>0)|(?P>L2)(?P>L1))/
+ 0
+ 0: 0
+ 1: 0
+ 2: 0
+ 00
+ 0: 0
+ 1: 0
+ 2: 0
+ 0000
+ 0: 0
+ 1: 0
+ 2: 0
+
+# 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
+No match
+
+# Check the use of names for failure
+
+/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
+\= Expect no match
+ AC
+No match, mark = A
+ CB
+No match, mark = B
+
+/(*MARK:A)(*SKIP:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: A
+\= Expect no match
+ D
+No match, mark = A
+
+/^(A(*THEN:A)B|C(*THEN:B)D)/mark
+\= Expect no match
+ CB
+No match, mark = B
+
+/^(?:A(*THEN:A)B|C(*THEN:B)D)/mark
+\= Expect no match
+ CB
+No match, mark = B
+
+/^(?>A(*THEN:A)B|C(*THEN:B)D)/mark
+\= Expect no match
+ CB
+No match, mark = B
+
+# 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
+ 0: AC
+
+# Test skipping over a non-matching mark.
+
+/A(*MARK:A)A+(*MARK:B)(*SKIP:A)(B|Z) | AC/x,mark
+ AAAC
+ 0: AC
+
+# Check shorthand for MARK.
+
+/A(*:A)A+(*SKIP:A)(B|Z) | AC/x,mark
+ AAAC
+ 0: AC
+
+/(*:A)A+(*SKIP:A)(B|Z)/mark
+\= Expect no match
+ AAAC
+No match, mark = A
+
+# This should succeed, as a non-existent skip name disables the skip.
+
+/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC/x,mark
+ AAAC
+ 0: AC
+
+/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC(*:B)/x,mark
+ AAAC
+ 0: AC
+MK: B
+
+# 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
+ 0: ABC
+ 1: A
+ 2: B
+ 3: C
+\= Expect no match
+ DEFGABC
+No match
+
+# COMMIT inside an atomic group can't stop backtracking over the group.
+
+/(\w+)(?>b(*COMMIT))\w{2}/
+ abbb
+ 0: abbb
+ 1: a
+
+/(\w+)b(*COMMIT)\w{2}/
+\= Expect no match
+ abbb
+No match
+
+# Check opening parens in comment when seeking forward reference.
+
+/(?&t)(?#()(?(DEFINE)(?<t>a))/
+ bac
+ 0: a
+
+# COMMIT should override THEN.
+
+/(?>(*COMMIT)(?>yes|no)(*THEN)(*F))?/
+\= Expect no match
+ yes
+No match
+
+/(?>(*COMMIT)(yes|no)(*THEN)(*F))?/
+\= Expect no match
+ yes
+No match
+
+/b?(*SKIP)c/
+ bc
+ 0: bc
+ abc
+ 0: bc
+
+/(*SKIP)bc/
+\= Expect no match
+ a
+No match
+
+/(*SKIP)b/
+\= Expect no match
+ a
+No match
+
+/(?P<abn>(?P=abn)xxx|)+/
+ xxx
+ 0:
+ 1:
+
+/(?i:([^b]))(?1)/
+ aa
+ 0: aa
+ 1: a
+ aA
+ 0: aA
+ 1: a
+\= Expect no match
+ ab
+No match
+ aB
+No match
+ Ba
+No match
+ ba
+No match
+
+/^(?&t)*+(?(DEFINE)(?<t>a))\w$/
+ aaaaaaX
+ 0: aaaaaaX
+\= Expect no match
+ aaaaaa
+No match
+
+/^(?&t)*(?(DEFINE)(?<t>a))\w$/
+ aaaaaaX
+ 0: aaaaaaX
+ aaaaaa
+ 0: aaaaaa
+
+/^(a)*+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: a
+ 2: X
+ YZ
+ 0: Y
+ 1: <unset>
+ 2: Y
+\= Expect no match
+ aaaa
+No match
+
+/^(?:a)*+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: X
+ YZ
+ 0: Y
+ 1: Y
+\= Expect no match
+ aaaa
+No match
+
+/^(a)++(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: a
+ 2: X
+\= Expect no match
+ aaaa
+No match
+ YZ
+No match
+
+/^(?:a)++(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: X
+\= Expect no match
+ aaaa
+No match
+ YZ
+No match
+
+/^(a)?+(\w)/
+ aaaaX
+ 0: aa
+ 1: a
+ 2: a
+ YZ
+ 0: Y
+ 1: <unset>
+ 2: Y
+
+/^(?:a)?+(\w)/
+ aaaaX
+ 0: aa
+ 1: a
+ YZ
+ 0: Y
+ 1: Y
+
+/^(a){2,}+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: a
+ 2: X
+\= Expect no match
+ aaa
+No match
+ YZ
+No match
+
+/^(?:a){2,}+(\w)/
+ aaaaX
+ 0: aaaaX
+ 1: X
+\= Expect no match
+ aaa
+No match
+ YZ
+No match
+
+/(a|)*(?1)b/
+ b
+ 0: b
+ 1:
+ ab
+ 0: ab
+ 1:
+ aab
+ 0: aab
+ 1:
+
+/(a)++(?1)b/
+\= Expect no match
+ ab
+No match
+ aab
+No match
+
+/(a)*+(?1)b/
+\= Expect no match
+ ab
+No match
+ aab
+No match
+
+/(?1)(?:(b)){0}/
+ b
+ 0: b
+
+/(foo ( \( ((?:(?> [^()]+ )|(?2))*) \) ) )/x
+ foo(bar(baz)+baz(bop))
+ 0: foo(bar(baz)+baz(bop))
+ 1: foo(bar(baz)+baz(bop))
+ 2: (bar(baz)+baz(bop))
+ 3: bar(baz)+baz(bop)
+
+/(A (A|B(*ACCEPT)|C) D)(E)/x
+ AB
+ 0: AB
+ 1: AB
+ 2: B
+
+/\A.*?(a|bc)/
+ ba
+ 0: ba
+ 1: a
+
+/\A.*?(?:a|bc)++/
+ ba
+ 0: ba
+
+/\A.*?(a|bc)++/
+ ba
+ 0: ba
+ 1: a
+
+/\A.*?(?:a|bc|d)/
+ ba
+ 0: ba
+
+/(?:(b))++/
+ beetle
+ 0: b
+ 1: b
+
+/(?(?=(a(*ACCEPT)z))a)/
+ a
+ 0: a
+ 1: a
+
+/^(a)(?1)+ab/
+ aaaab
+ 0: aaaab
+ 1: a
+
+/^(a)(?1)++ab/
+\= Expect no match
+ aaaab
+No match
+
+/^(?=a(*:M))aZ/mark
+ aZbc
+ 0: aZ
+MK: M
+
+/^(?!(*:M)b)aZ/mark
+ aZbc
+ 0: aZ
+
+/(?(DEFINE)(a))?b(?1)/
+ backgammon
+ 0: ba
+
+/^\N+/
+ abc\ndef
+ 0: abc
+
+/^\N{1,}/
+ abc\ndef
+ 0: abc
+
+/(?(R)a+|(?R)b)/
+ aaaabcde
+ 0: aaaab
+
+/(?(R)a+|((?R))b)/
+ aaaabcde
+ 0: aaaab
+ 1: aaaa
+
+/((?(R)a+|(?1)b))/
+ aaaabcde
+ 0: aaaab
+ 1: aaaab
+
+/((?(R1)a+|(?1)b))/
+ aaaabcde
+ 0: aaaab
+ 1: aaaab
+
+/((?(R)a|(?1)))*/
+ aaa
+ 0: aaa
+ 1: a
+
+/((?(R)a|(?1)))+/
+ aaa
+ 0: aaa
+ 1: a
+
+/a(*:any
+name)/mark
+ abc
+ 0: a
+MK: any \x0aname
+
+/(?>(?&t)c|(?&t))(?(DEFINE)(?<t>a|b(*PRUNE)c))/
+ a
+ 0: a
+ ba
+ 0: a
+ bba
+ 0: a
+
+# Checking revised (*THEN) handling.
+
+# Capture
+
+/^.*? (a(*THEN)b) c/x
+\= Expect no match
+ aabc
+No match
+
+/^.*? (a(*THEN)b|(*F)) c/x
+ aabc
+ 0: aabc
+ 1: ab
+
+/^.*? ( (a(*THEN)b) | (*F) ) c/x
+ aabc
+ 0: aabc
+ 1: ab
+ 2: ab
+
+/^.*? ( (a(*THEN)b) ) c/x
+\= Expect no match
+ aabc
+No match
+
+# Non-capture
+
+/^.*? (?:a(*THEN)b) c/x
+\= Expect no match
+ aabc
+No match
+
+/^.*? (?:a(*THEN)b|(*F)) c/x
+ aabc
+ 0: aabc
+
+/^.*? (?: (?:a(*THEN)b) | (*F) ) c/x
+ aabc
+ 0: aabc
+
+/^.*? (?: (?:a(*THEN)b) ) c/x
+\= Expect no match
+ aabc
+No match
+
+# Atomic
+
+/^.*? (?>a(*THEN)b) c/x
+\= Expect no match
+ aabc
+No match
+
+/^.*? (?>a(*THEN)b|(*F)) c/x
+ aabc
+ 0: aabc
+
+/^.*? (?> (?>a(*THEN)b) | (*F) ) c/x
+ aabc
+ 0: aabc
+
+/^.*? (?> (?>a(*THEN)b) ) c/x
+\= Expect no match
+ aabc
+No match
+
+# Possessive capture
+
+/^.*? (a(*THEN)b)++ c/x
+\= Expect no match
+ aabc
+No match
+
+/^.*? (a(*THEN)b|(*F))++ c/x
+ aabc
+ 0: aabc
+ 1: ab
+
+/^.*? ( (a(*THEN)b)++ | (*F) )++ c/x
+ aabc
+ 0: aabc
+ 1: ab
+ 2: ab
+
+/^.*? ( (a(*THEN)b)++ )++ c/x
+\= Expect no match
+ aabc
+No match
+
+# Possessive non-capture
+
+/^.*? (?:a(*THEN)b)++ c/x
+\= Expect no match
+ aabc
+No match
+
+/^.*? (?:a(*THEN)b|(*F))++ c/x
+ aabc
+ 0: aabc
+
+/^.*? (?: (?:a(*THEN)b)++ | (*F) )++ c/x
+ aabc
+ 0: aabc
+
+/^.*? (?: (?:a(*THEN)b)++ )++ c/x
+\= Expect no match
+ aabc
+No match
+
+# Condition assertion
+
+/^(?(?=a(*THEN)b)ab|ac)/
+ ac
+ 0: ac
+
+# Condition
+
+/^.*?(?(?=a)a|b(*THEN)c)/
+\= Expect no match
+ ba
+No match
+
+/^.*?(?:(?(?=a)a|b(*THEN)c)|d)/
+ ba
+ 0: ba
+
+/^.*?(?(?=a)a(*THEN)b|c)/
+\= Expect no match
+ ac
+No match
+
+# Assertion
+
+/^.*(?=a(*THEN)b)/
+ aabc
+ 0: a
+
+# --------------------------
+
+/(?>a(*:m))/imsx,mark
+ a
+ 0: a
+MK: m
+
+/(?>(a)(*:m))/imsx,mark
+ a
+ 0: a
+ 1: a
+MK: m
+
+/(?<=a(*ACCEPT)b)c/
+ xacd
+ 0: c
+
+/(?<=(a(*ACCEPT)b))c/
+ xacd
+ 0: c
+ 1: a
+
+/(?<=(a(*COMMIT)b))c/
+ xabcd
+ 0: c
+ 1: ab
+\= Expect no match
+ xacd
+No match
+
+/(?<!a(*FAIL)b)c/
+ xcd
+ 0: c
+ acd
+ 0: c
+
+/(?<=a(*:N)b)c/mark
+ xabcd
+ 0: c
+MK: N
+
+/(?<=a(*PRUNE)b)c/
+ xabcd
+ 0: c
+
+/(?<=a(*SKIP)b)c/
+ xabcd
+ 0: c
+
+/(?<=a(*THEN)b)c/
+ xabcd
+ 0: c
+
+/(a)(?2){2}(.)/
+ abcd
+ 0: abcd
+ 1: a
+ 2: d
+
+/(*MARK:A)(*PRUNE:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: B
+\= Expect no match
+ D
+No match, mark = B
+
+/(*MARK:A)(*PRUNE:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: B
+\= Expect no match
+ D
+No match, mark = B
+
+/(*MARK:A)(*THEN:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: B
+\= Expect no match
+ D
+No match, mark = B
+
+/(*MARK:A)(*THEN:B)(C|X)/mark,no_start_optimize
+ C
+ 0: C
+ 1: C
+MK: B
+\= Expect no match
+ D
+No match, mark = B
+
+/(*MARK:A)(*THEN:B)(C|X)/mark
+ C
+ 0: C
+ 1: C
+MK: B
+\= Expect no match
+ D
+No match, mark = B
+
+# 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
+No match, mark = A
+
+# Same
+
+/A(*MARK:A)A+(*MARK:B)(*SKIP:B)(B|Z) | AC/x,mark
+\= Expect no match
+ AAAC
+No match, mark = B
+
+/A(*:A)A+(*SKIP)(B|Z) | AC/x,mark
+\= Expect no match
+ AAAC
+No match, mark = A
+
+# 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
+No match, mark = A
+
+# 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
+ 0: AB
+MK: A
+ XXYZ
+ 0: XXY
+MK: B
+\= Expect no match
+ XAQQ
+No match, mark = A
+ XAQQXZZ
+No match, mark = A
+ AXQQQ
+No match, mark = A
+ AXXQQQ
+No match, mark = B
+
+/^(A(*THEN:A)B|C(*THEN:B)D)/mark
+ AB
+ 0: AB
+ 1: AB
+MK: A
+ CD
+ 0: CD
+ 1: CD
+MK: B
+\= Expect no match
+ AC
+No match, mark = A
+ CB
+No match, mark = B
+
+/^(A(*PRUNE:A)B|C(*PRUNE:B)D)/mark
+ AB
+ 0: AB
+ 1: AB
+MK: A
+ CD
+ 0: CD
+ 1: CD
+MK: B
+\= Expect no match
+ AC
+No match, mark = A
+ CB
+No match, mark = B
+
+# 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
+ 0: AB
+ 1: AB
+ CD
+ 0: CD
+ 1: CD
+MK: B
+
+# PRUNE goes to next bumpalong; COMMIT does not.
+
+/A(*PRUNE:A)B/mark
+ ACAB
+ 0: AB
+MK: A
+
+# Mark names can be duplicated.
+
+/A(*:A)B|X(*:A)Y/mark
+ AABC
+ 0: AB
+MK: A
+ XXYZ
+ 0: XY
+MK: A
+
+/b(*:m)f|a(*:n)w/mark
+ aw
+ 0: aw
+MK: n
+\= Expect no match
+ abc
+No match, mark = m
+
+/b(*:m)f|aw/mark
+ abaw
+ 0: aw
+\= Expect no match
+ abc
+No match, mark = m
+ abax
+No match, mark = m
+
+/A(*MARK:A)A+(*SKIP:B)(B|Z) | AAC/x,mark
+ AAAC
+ 0: AAC
+
+/(?=a(*MARK:A)b)..x/mark
+ abxy
+ 0: abx
+MK: A
+\= Expect no match
+ abpq
+No match
+
+/(?=a(*MARK:A)b)..(*:Y)x/mark
+ abxy
+ 0: abx
+MK: Y
+\= Expect no match
+ abpq
+No match
+
+/(?=a(*PRUNE:A)b)..x/mark
+ abxy
+ 0: abx
+MK: A
+\= Expect no match
+ abpq
+No match
+
+/(?=a(*PRUNE:A)b)..(*:Y)x/mark
+ abxy
+ 0: abx
+MK: Y
+\= Expect no match
+ abpq
+No match
+
+/(?=a(*THEN:A)b)..x/mark
+ abxy
+ 0: abx
+MK: A
+\= Expect no match
+ abpq
+No match
+
+/(?=a(*THEN:A)b)..(*:Y)x/mark
+ abxy
+ 0: abx
+MK: Y
+\= Expect no match
+ abpq
+No match
+
+/(another)?(\1?)test/
+ hello world test
+ 0: test
+ 1: <unset>
+ 2:
+
+/(another)?(\1+)test/
+\= Expect no match
+ hello world test
+No match
+
+/(a(*COMMIT)b){0}a(?1)|aac/
+ aac
+ 0: aac
+
+/((?:a?)*)*c/
+ aac
+ 0: aac
+ 1:
+
+/((?>a?)*)*c/
+ aac
+ 0: aac
+ 1:
+
+/(?>.*?a)(?<=ba)/
+ aba
+ 0: ba
+
+/(?:.*?a)(?<=ba)/
+ aba
+ 0: aba
+
+/(?>.*?a)b/s
+ aab
+ 0: ab
+
+/(?>.*?a)b/
+ aab
+ 0: ab
+
+/(?>^a)b/s
+\= Expect no match
+ aab
+No match
+
+/(?>.*?)(?<=(abcd)|(wxyz))/
+ alphabetabcd
+ 0:
+ 1: abcd
+ endingwxyz
+ 0:
+ 1: <unset>
+ 2: wxyz
+
+/(?>.*)(?<=(abcd)|(wxyz))/
+ alphabetabcd
+ 0: alphabetabcd
+ 1: abcd
+ endingwxyz
+ 0: endingwxyz
+ 1: <unset>
+ 2: wxyz
+
+"(?>.*)foo"
+\= Expect no match
+ abcdfooxyz
+No match
+
+"(?>.*?)foo"
+ abcdfooxyz
+ 0: foo
+
+/(?:(a(*PRUNE)b)){0}(?:(?1)|ac)/
+ ac
+ 0: ac
+
+/(?:(a(*SKIP)b)){0}(?:(?1)|ac)/
+ ac
+ 0: ac
+
+/(?<=(*SKIP)ac)a/
+\= Expect no match
+ aa
+No match
+
+/A(*MARK:A)A+(*SKIP:B)(B|Z) | AC/x,mark
+ AAAC
+ 0: AC
+
+/a(*SKIP:m)x|ac(*:n)(*SKIP:n)d|ac/mark
+ acacd
+ 0: acd
+MK: n
+
+/A(*SKIP:m)x|A(*SKIP:n)x|AB/mark
+ AB
+ 0: AB
+
+/((*SKIP:r)d){0}a(*SKIP:m)x|ac(*:n)|ac/mark
+ acacd
+ 0: ac
+MK: n
+
+# 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
+ 0: aaaac
+
+# 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
+ 0: aaaac
+
+/aaaaa(*SKIP:N)(*PRUNE)b|a+c/
+ aaaaaac
+ 0: aaaac
+
+/aaaa(*:N)a(*SKIP:N)(*PRUNE)b|a+c/
+ aaaaaac
+ 0: aaaac
+
+# Putting THEN in front makes no difference.
+
+/aaaaa(*THEN)(*PRUNE)b|a+c/
+ aaaaaac
+ 0: aaaac
+
+# 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
+ 0: ac
+
+# Putting PRUNE in front makes no difference.
+
+/aaaaa(*PRUNE)(*SKIP)b|a+c/
+ aaaaaac
+ 0: ac
+
+# Putting THEN in front makes no difference.
+
+/aaaaa(*THEN)(*SKIP)b|a+c/
+ aaaaaac
+ 0: ac
+
+# In this case, neither does COMMIT. This still matches "ac".
+
+/aaaaa(*COMMIT)(*SKIP)b|a+c/
+ aaaaaac
+ 0: ac
+
+# This gives "no match", as expected.
+
+/aaaaa(*COMMIT)b|a+c/
+\= Expect no match
+ aaaaaac
+No match
+
+# ---- Tests using THEN ----
+
+# This matches "aaaaaac", as expected.
+
+/aaaaa(*THEN)b|a+c/
+ aaaaaac
+ 0: aaaaaac
+
+# Putting SKIP in front makes no difference.
+
+/aaaaa(*SKIP)(*THEN)b|a+c/
+ aaaaaac
+ 0: aaaaaac
+
+# Putting PRUNE in front makes no difference.
+
+/aaaaa(*PRUNE)(*THEN)b|a+c/
+ aaaaaac
+ 0: aaaaaac
+
+# Putting COMMIT in front makes no difference.
+
+/aaaaa(*COMMIT)(*THEN)b|a+c/
+ aaaaaac
+ 0: aaaaaac
+
+# End of "priority" tests
+
+/aaaaa(*:m)(*PRUNE:m)(*SKIP:m)m|a+/
+ aaaaaa
+ 0: a
+
+/aaaaa(*:m)(*MARK:m)(*PRUNE)(*SKIP:m)m|a+/
+ aaaaaa
+ 0: a
+
+/aaaaa(*:n)(*PRUNE:m)(*SKIP:m)m|a+/
+ aaaaaa
+ 0: aaaa
+
+/aaaaa(*:n)(*MARK:m)(*PRUNE)(*SKIP:m)m|a+/
+ aaaaaa
+ 0: a
+
+/a(*MARK:A)aa(*PRUNE:A)a(*SKIP:A)b|a+c/
+ aaaac
+ 0: aac
+
+/a(*MARK:A)aa(*MARK:A)a(*SKIP:A)b|a+c/
+ aaaac
+ 0: ac
+
+/aaa(*PRUNE:A)a(*SKIP:A)b|a+c/
+ aaaac
+ 0: aac
+
+/aaa(*MARK:A)a(*SKIP:A)b|a+c/
+ aaaac
+ 0: ac
+
+/a(*:m)a(*COMMIT)(*SKIP:m)b|a+c/mark
+ aaaaaac
+ 0: ac
+
+/.?(a|b(*THEN)c)/
+ ba
+ 0: ba
+ 1: a
+
+/(a(*COMMIT)b)c|abd/
+ abc
+ 0: abc
+ 1: ab
+\= Expect no match
+ abd
+No match
+
+/(?=a(*COMMIT)b)abc|abd/
+ abc
+ 0: abc
+ abd
+ 0: abd
+
+/(?>a(*COMMIT)b)c|abd/
+ abc
+ 0: abc
+ abd
+ 0: abd
+
+/a(?=b(*COMMIT)c)[^d]|abd/
+ abc
+ 0: ab
+\= Expect no match
+ abd
+No match
+
+/a(?=bc).|abd/
+ abd
+ 0: abd
+ abc
+ 0: ab
+
+/a(?>b(*COMMIT)c)d|abd/
+\= Expect no match
+ abceabd
+No match
+
+/a(?>bc)d|abd/
+ abceabd
+ 0: abd
+
+/(?>a(*COMMIT)b)c|abd/
+ abd
+ 0: abd
+
+/(?>a(*COMMIT)c)d|abd/
+\= Expect no match
+ abd
+No match
+
+/((?=a(*COMMIT)b)ab|ac){0}(?:(?1)|a(c))/
+ ac
+ 0: ac
+ 1: <unset>
+ 2: c
+
+# 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
+No match
+
+/(?=a\Kb)ab/
+ ab
+ 0: b
+
+/(?!a\Kb)ac/
+ ac
+ 0: ac
+
+/^abc(?<=b\Kc)d/
+ abcd
+ 0: cd
+
+/^abc(?<!b\Kq)d/
+ abcd
+ 0: abcd
+
+/A(*PRUNE:A)A+(*SKIP:A)(B|Z) | AC/x,mark
+\= Expect no match
+ AAAC
+No match, mark = A
+
+/^((abc|abcx)(*THEN)y|abcd)/
+ abcd
+ 0: abcd
+ 1: abcd
+\= Expect no match
+ abcxy
+No match
+
+/^((yes|no)(*THEN)(*F))?/
+\= Expect no match
+ yes
+No match
+
+/(A (.*) C? (*THEN) | A D) (*FAIL)/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) C? (*THEN) | A D) z/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) C? (*THEN) | A D) \s* (*FAIL)/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) C? (*THEN) | A D) \s* z/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) (?:C|) (*THEN) | A D) (*FAIL)/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) (?:C|) (*THEN) | A D) z/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) C{0,6} (*THEN) | A D) (*FAIL)/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) C{0,6} (*THEN) | A D) z/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) (CE){0,6} (*THEN) | A D) (*FAIL)/x
+\= Expect no match
+ AbcdCEBefgBhiBqz
+No match
+
+/(A (.*) (CE){0,6} (*THEN) | A D) z/x
+\= Expect no match
+ AbcdCEBefgBhiBqz
+No match
+
+/(A (.*) (CE*){0,6} (*THEN) | A D) (*FAIL)/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(A (.*) (CE*){0,6} (*THEN) | A D) z/x
+\= Expect no match
+ AbcdCBefgBhiBqz
+No match
+
+/(?=a(*COMMIT)b|ac)ac|ac/
+\= Expect no match
+ ac
+No match
+
+/(?=a(*COMMIT)b|(ac)) ac | (a)c/x
+\= Expect no match
+ ac
+No match
+
+# ----
+
+/(?(?!b(*THEN)a)bn|bnn)/
+ bnn
+ 0: bn
+
+/(?!b(*SKIP)a)bn|bnn/
+ bnn
+ 0: bn
+
+/(?(?!b(*SKIP)a)bn|bnn)/
+ bnn
+ 0: bn
+
+/(?!b(*PRUNE)a)bn|bnn/
+ bnn
+ 0: bn
+
+/(?(?!b(*PRUNE)a)bn|bnn)/
+ bnn
+ 0: bn
+
+/(?!b(*COMMIT)a)bn|bnn/
+ bnn
+ 0: bn
+
+/(?(?!b(*COMMIT)a)bn|bnn)/
+ bnn
+ 0: bn
+
+/(?=b(*SKIP)a)bn|bnn/
+\= Expect no match
+ bnn
+No match
+
+/(?=b(*THEN)a)bn|bnn/
+ bnn
+ 0: bnn
+
+/^(?!a(*SKIP)b)/
+ ac
+ 0:
+
+/^(?!a(*SKIP)b)../
+ acd
+ 0: ac
+
+/(?!a(*SKIP)b)../
+ acd
+ 0: ac
+
+/^(?(?!a(*SKIP)b))/
+ ac
+ 0:
+
+/^(?!a(*PRUNE)b)../
+ acd
+ 0: ac
+
+/(?!a(*PRUNE)b)../
+ acd
+ 0: ac
+
+/(?!a(*COMMIT)b)ac|cd/
+ ac
+ 0: ac
+
+/\A.*?(?:a|bc)/
+ ba
+ 0: ba
+
+/^(A(*THEN)B|C(*THEN)D)/
+ CD
+ 0: CD
+ 1: CD
+
+/(*:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
+ abc
+ 0: b
+MK: m(m
+
+/(*PRUNE:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
+ abc
+ 0: b
+MK: m(m
+
+/(*SKIP:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
+ abc
+ 0: b
+
+/(*THEN:m(m)(?&y)(?(DEFINE)(?<y>b))/mark
+ abc
+ 0: b
+MK: m(m
+
+/^\d*\w{4}/
+ 1234
+ 0: 1234
+\= Expect no match
+ 123
+No match
+
+/^[^b]*\w{4}/
+ aaaa
+ 0: aaaa
+\= Expect no match
+ aaa
+No match
+
+/^[^b]*\w{4}/i
+ aaaa
+ 0: aaaa
+\= Expect no match
+ aaa
+No match
+
+/^a*\w{4}/
+ aaaa
+ 0: aaaa
+\= Expect no match
+ aaa
+No match
+
+/^a*\w{4}/i
+ aaaa
+ 0: aaaa
+\= Expect no match
+ aaa
+No match
+
+/(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
+ foofoo
+ 0: foofoo
+ 1: foo
+ barbar
+ 0: barbar
+ 1: <unset>
+ 2: bar
+
+/(?<n>A)(?:(?<n>foo)|(?<n>bar))\k<n>/dupnames
+ AfooA
+ 0: AfooA
+ 1: A
+ 2: foo
+ AbarA
+ 0: AbarA
+ 1: A
+ 2: <unset>
+ 3: bar
+\= Expect no match
+ Afoofoo
+No match
+ Abarbar
+No match
+
+/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
+ 1 IN SOA non-sp1 non-sp2(
+ 0: 1 IN SOA non-sp1 non-sp2(
+ 1: 1
+ 2: non-sp1
+ 3: non-sp2
+
+/^ (?:(?<A>A)|(?'B'B)(?<A>A)) (?('A')x) (?(<B>)y)$/x,dupnames
+ Ax
+ 0: Ax
+ 1: A
+ BAxy
+ 0: BAxy
+ 1: <unset>
+ 2: B
+ 3: A
+
+/^A\xZ/
+ A\0Z
+ 0: A\x00Z
+
+/^A\o{123}B/
+ A\123B
+ 0: ASB
+
+/ ^ a + + b $ /x
+ aaaab
+ 0: aaaab
+
+/ ^ a + #comment
+ + b $ /x
+ aaaab
+ 0: aaaab
+
+/ ^ a + #comment
+ #comment
+ + b $ /x
+ aaaab
+ 0: aaaab
+
+/ ^ (?> a + ) b $ /x
+ aaaab
+ 0: aaaab
+
+/ ^ ( a + ) + + \w $ /x
+ aaaab
+ 0: aaaab
+ 1: aaaa
+
+/(?:a\Kb)*+/aftertext
+ ababc
+ 0: b
+ 0+ c
+
+/(?>a\Kb)*/aftertext
+ ababc
+ 0: b
+ 0+ c
+
+/(?:a\Kb)*/aftertext
+ ababc
+ 0: b
+ 0+ c
+
+/(a\Kb)*+/aftertext
+ ababc
+ 0: b
+ 0+ c
+ 1: ab
+
+/(a\Kb)*/aftertext
+ ababc
+ 0: b
+ 0+ c
+ 1: ab
+
+/(?:x|(?:(xx|yy)+|x|x|x|x|x)|a|a|a)bc/
+\= Expect no match
+ acb
+No match
+
+'\A(?:[^\"]++|\"(?:[^\"]*+|\"\")*+\")++'
+ NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
+ 0: NON QUOTED "QUOT""ED" AFTER
+
+'\A(?:[^\"]++|\"(?:[^\"]++|\"\")*+\")++'
+ NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
+ 0: NON QUOTED "QUOT""ED" AFTER
+
+'\A(?:[^\"]++|\"(?:[^\"]++|\"\")++\")++'
+ NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
+ 0: NON QUOTED "QUOT""ED" AFTER
+
+'\A([^\"1]++|[\"2]([^\"3]*+|[\"4][\"5])*+[\"6])++'
+ NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED
+ 0: NON QUOTED "QUOT""ED" AFTER
+ 1: AFTER
+ 2:
+
+/^\w+(?>\s*)(?<=\w)/
+ test test
+ 0: tes
+
+/(?P<same>a)(?P<same>b)/g,dupnames
+ abbaba
+ 0: ab
+ 1: a
+ 2: b
+ 0: ab
+ 1: a
+ 2: b
+
+/(?P<same>a)(?P<same>b)(?P=same)/g,dupnames
+ abbaba
+ 0: aba
+ 1: a
+ 2: b
+
+/(?P=same)?(?P<same>a)(?P<same>b)/g,dupnames
+ abbaba
+ 0: ab
+ 1: a
+ 2: b
+ 0: ab
+ 1: a
+ 2: b
+
+/(?:(?P=same)?(?:(?P<same>a)|(?P<same>b))(?P=same))+/g,dupnames
+ bbbaaabaabb
+ 0: bbbaaaba
+ 1: a
+ 2: b
+ 0: bb
+ 1: <unset>
+ 2: b
+
+/(?:(?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
+No match
+
+/(?P<Name>a)?(?P<Name2>b)?(?(<Name>)c|d)*l/
+ acl
+ 0: acl
+ 1: a
+ bdl
+ 0: bdl
+ 1: <unset>
+ 2: b
+ adl
+ 0: dl
+ bcl
+ 0: l
+
+/\sabc/
+ \x{0b}abc
+ 0: \x0babc
+
+/[\Qa]\E]+/
+ aa]]
+ 0: aa]]
+
+/[\Q]a\E]+/
+ aa]]
+ 0: aa]]
+
+/A((((((((a))))))))\8B/
+ AaaB
+ 0: AaaB
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+
+/A(((((((((a)))))))))\9B/
+ AaaB
+ 0: AaaB
+ 1: a
+ 2: a
+ 3: a
+ 4: a
+ 5: a
+ 6: a
+ 7: a
+ 8: a
+ 9: a
+
+/A[\8\9]B/
+ A8B
+ 0: A8B
+ A9B
+ 0: A9B
+
+/(|ab)*?d/
+ abd
+ 0: abd
+ 1: ab
+ xyd
+ 0: d
+
+/(?:((abcd))|(((?:(?:(?:(?:abc|(?:abcdef))))b)abcdefghi)abc)|((*ACCEPT)))/
+ 1234abcd
+ 0:
+ 1: <unset>
+ 2: <unset>
+ 3: <unset>
+ 4: <unset>
+ 5:
+
+/(\2|a)(\1)/
+ aaa
+ 0: aa
+ 1: a
+ 2: a
+
+/(\2)(\1)/
+
+"Z*(|d*){216}"
+
+"(?1)(?#?'){8}(a)"
+ baaaaaaaaac
+ 0: aaaaaaaaa
+ 1: a
+
+/((((((((((((x))))))))))))\12/
+ xx
+ 0: xx
+ 1: x
+ 2: x
+ 3: x
+ 4: x
+ 5: x
+ 6: x
+ 7: x
+ 8: x
+ 9: x
+10: x
+11: x
+12: x
+
+/A[\8]B[\9]C/
+ A8B9C
+ 0: A8B9C
+
+/(?1)()((((((\1++))\x85)+)|))/
+ \x85\x85
+ 0: \x85\x85
+ 1:
+ 2: \x85\x85
+ 3: \x85\x85
+ 4: \x85\x85
+ 5: \x85
+ 6:
+ 7:
+
+"(?|(\k'Pm')|(?'Pm'))"
+ abcd
+ 0:
+ 1:
+
+/(?|(aaa)|(b))\g{1}/
+ aaaaaa
+ 0: aaaaaa
+ 1: aaa
+ bb
+ 0: bb
+ 1: b
+
+/(?|(aaa)|(b))(?1)/
+ aaaaaa
+ 0: aaaaaa
+ 1: aaa
+ baaa
+ 0: baaa
+ 1: b
+\= Expect no match
+ bb
+No match
+
+/(?|(aaa)|(b))/
+ xaaa
+ 0: aaa
+ 1: aaa
+ xbc
+ 0: b
+ 1: b
+
+/(?|(?'a'aaa)|(?'a'b))\k'a'/
+ aaaaaa
+ 0: aaaaaa
+ 1: aaa
+ bb
+ 0: bb
+ 1: b
+
+/(?|(?'a'aaa)|(?'a'b))(?'a'cccc)\k'a'/dupnames
+ aaaccccaaa
+ 0: aaaccccaaa
+ 1: aaa
+ 2: cccc
+ bccccb
+ 0: bccccb
+ 1: b
+ 2: cccc
+
+# /x does not apply to MARK labels
+
+/x (*MARK:ab cd # comment
+ef) x/x,mark
+ axxz
+ 0: xx
+MK: ab cd # comment\x0aef
+
+/(?<=a(B){0}c)X/
+ acX
+ 0: X
+
+/(?<DEFINE>b)(?(DEFINE)(a+))(?&DEFINE)/
+ bbbb
+ 0: bb
+ 1: b
+\= Expect no match
+ baaab
+No match
+
+/(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[,;:])(?=.{8,16})(?!.*[\s])/
+ \ Fred:099
+ 0:
+
+/(?=.*X)X$/
+ \ X
+ 0: X
+
+/(?s)(?=.*?)b/
+ aabc
+ 0: b
+
+/(Z)(a)\2{1,2}?(?-i)\1X/i
+ ZaAAZX
+ 0: ZaAAZX
+ 1: Z
+ 2: a
+
+/(?'c')XX(?'YYYYYYYYYYYYYYYYYYYYYYYCl')/
+
+/[s[:digit:]\E-H]+/
+ s09-H
+ 0: s09-H
+
+/[s[:digit:]\Q\E-H]+/
+ s09-H
+ 0: s09-H
+
+/a+(?:|b)a/
+ aaaa
+ 0: aaaa
+
+/X?(R||){3335}/
+
+/(?1)(A(*COMMIT)|B)D/
+ ABD
+ 0: ABD
+ 1: B
+ XABD
+ 0: ABD
+ 1: B
+ BAD
+ 0: BAD
+ 1: A
+ ABXABD
+ 0: ABD
+ 1: B
+\= Expect no match
+ ABX
+No match
+
+/(?(DEFINE)(?<m> 1? (?=(?<cond>2)?) 1 2 (?('cond')|3)))
+ \A
+ ()
+ (?&m)
+ \Z/x
+ 123
+ 0: 123
+ 1: <unset>
+ 2: <unset>
+ 3:
+
+/^(?:
+(?: A| (1? (?=(?<cond>2)?) (1) 2 (?('cond')|3)) )
+(Z)
+)+$/x
+ AZ123Z
+ 0: AZ123Z
+ 1: 123
+ 2: <unset>
+ 3: 1
+ 4: Z
+\= Expect no match
+ AZ12Z
+No match
+
+/^ (?(DEFINE) ( (?!(a)\2b)..) ) ()(?1) /x
+ acb
+ 0: ac
+ 1: <unset>
+ 2: <unset>
+ 3:
+\= Expect no match
+ aab
+No match
+
+'(?>ab|abab){1,5}?M'
+ abababababababababababM
+ 0: abababababM
+
+'(?>ab|abab){2}?M'
+ abababM
+ 0: ababM
+
+'((?(?=(a))a)+k)'
+ bbak
+ 0: ak
+ 1: ak
+ 2: a
+
+'((?(?=(a))a|)+k)'
+ bbak
+ 0: ak
+ 1: ak
+ 2: a
+
+'(?(?!(b))a|b)+k'
+ ababbalbbadabak
+ 0: abak
+ 1: b
+
+/(?!(b))c|b/
+ Ab
+ 0: b
+ Ac
+ 0: c
+
+/(?=(b))b|c/
+ Ab
+ 0: b
+ 1: b
+ Ac
+ 0: c
+
+/^(.|(.)(?1)\2)$/
+ a
+ 0: a
+ 1: a
+ aba
+ 0: aba
+ 1: aba
+ 2: a
+ abcba
+ 0: abcba
+ 1: abcba
+ 2: a
+ ababa
+ 0: ababa
+ 1: ababa
+ 2: a
+ abcdcba
+ 0: abcdcba
+ 1: abcdcba
+ 2: a
+
+/^((.)(?1)\2|.?)$/
+ a
+ 0: a
+ 1: a
+ aba
+ 0: aba
+ 1: aba
+ 2: a
+ abba
+ 0: abba
+ 1: abba
+ 2: a
+ abcba
+ 0: abcba
+ 1: abcba
+ 2: a
+ ababa
+ 0: ababa
+ 1: ababa
+ 2: a
+ abccba
+ 0: abccba
+ 1: abccba
+ 2: a
+ abcdcba
+ 0: abcdcba
+ 1: abcdcba
+ 2: a
+ abcddcba
+ 0: abcddcba
+ 1: abcddcba
+ 2: a
+
+/^(.)(\1|a(?2))/
+ bab
+ 0: bab
+ 1: b
+ 2: ab
+
+/^(.|(.)(?1)?\2)$/
+ abcba
+ 0: abcba
+ 1: abcba
+ 2: a
+
+/^(?(?=(a))abc|def)/
+ abc
+ 0: abc
+ 1: a
+
+/^(?(?!(a))def|abc)/
+ abc
+ 0: abc
+ 1: a
+
+/^(?(?=(a)(*ACCEPT))abc|def)/
+ abc
+ 0: abc
+ 1: a
+
+/^(?(?!(a)(*ACCEPT))def|abc)/
+ abc
+ 0: abc
+ 1: a
+
+/^(?1)\d{3}(a)/
+ a123a
+ 0: a123a
+ 1: a
+
+# 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) | (?"ed_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) | (?"ed_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) | (?"ed_string) )
+(?<mailbox> (?&name_addr) | (?&addr_spec) )
+(?<name_addr> (?&display_name)? (?&angle_addr) )
+(?<phrase> (?&word)++ )
+(?<qcontent> (?&qtext) | (?"ed_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) | (?"ed_string) )
+) # End DEFINE
+^(?&mailbox)$/
+ Alan Other <user\@dom.ain>
+ 0: Alan Other <user@dom.ain>
+ <user\@dom.ain>
+ 0: <user@dom.ain>
+ user\@dom.ain
+ 0: user@dom.ain
+ user\@[]
+ 0: user@[]
+ user\@[domain literal]
+ 0: user@[domain literal]
+ user\@[domain literal with \"[square brackets\"] inside]
+ 0: user@[domain literal with "[square brackets"] inside]
+ \"A. Other\" <user.1234\@dom.ain> (a comment)
+ 0: "A. Other" <user.1234@dom.ain> (a comment)
+ A. Other <user.1234\@dom.ain> (a comment)
+ 0: A. Other <user.1234@dom.ain> (a comment)
+ \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
+ 0: "/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/"@x400-re.lay
+\= Expect no match
+ A missing angle <user\@some.where
+No match
+ The quick brown fox
+No match
+
+# --------------------------------------------------------------------------
+
+# 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> \( \? > (?®ex) \) )
+
+(?<back_reference> \\ \d+ |
+ \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) |
+ \\k <(?&groupname)> |
+ \\k '(?&groupname)' |
+ \\k \{ (?&groupname) \} |
+ \( \? P= (?&groupname) \) )
+
+(?<branch> (?:(?&assertion) |
+ (?&callout) |
+ (?&comment) |
+ (?&option_setting) |
+ (?&qualified_item) |
+ (?"ed_string) |
+ (?"ed_string_empty) |
+ (?&special_escape) |
+ (?&verb)
+ )* )
+
+(?<callout> \(\?C (?: \d+ |
+ (?: (?<D>["'`^%\#\$])
+ (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' |
+ \{ (?: \}\} | [^}]*+ )* \} )
+ )? \) )
+
+(?<capturing_group> \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )?
+ (?®ex) \) )
+
+(?<character_class> \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )
+
+(?<character_type> (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )
+
+(?<class_item> (?: \[ : (?:
+ alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print|
+ punct|space|upper|word|xdigit
+ ) : \] |
+ (?"ed_string) |
+ (?"ed_string_empty) |
+ (?&escaped_character) |
+ (?&character_type) |
+ [^]] ) )
+
+(?<comment> \(\?\# [^)]* \) | (?"ed_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}!"'`=_:;,%&@~]) (?®ex)
+ \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> \(\? (?: = | ! | <= | <! ) (?®ex) \) )
+
+(?<non_capturing_group> \(\? [iJmnsUx-]* : (?®ex) \) )
+
+(?<option_setting> \(\? [iJmnsUx-]* \) )
+
+(?<qualified_item> (?:\. |
+ (?&lookaround) |
+ (?&back_reference) |
+ (?&character_class) |
+ (?&character_type) |
+ (?&escaped_character) |
+ (?&group) |
+ (?&subroutine_call) |
+ (?&literal_character) |
+ (?"ed_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> \( \? \| (?®ex) \) )
+
+(?<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)$/subject_literal,jitstack=256
+ /^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
+ 0: /^(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\11*(\3\4)\1(?#)2$/
+ /(cat(a(ract|tonic)|erpillar)) \1()2(3)/
+ 0: /(cat(a(ract|tonic)|erpillar)) \1()2(3)/
+ /^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/
+ 0: /^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/
+ /^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
+ 0: /^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
+ /<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
+ 0: /<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
+ /^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /
+ 0: /^(?(DEFINE) (?<A> a) (?<B> b) ) (?&A) (?&B) /
+ /(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
+ 0: /(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/
+ /\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
+ 0: /\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?<byte>2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/
+ /^(\w++|\s++)*$/
+ 0: /^(\w++|\s++)*$/
+ /a+b?(*THEN)c+(*FAIL)/
+ 0: /a+b?(*THEN)c+(*FAIL)/
+ /(A (A|B(*ACCEPT)|C) D)(E)/x
+ 0: /(A (A|B(*ACCEPT)|C) D)(E)/x
+ /^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
+ 0: /^\W*+(?:((.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$/i
+ /A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
+ 0: /A(*PRUNE)B(*SKIP)C(*THEN)D(*COMMIT)E(*F)F(*FAIL)G(?!)H(*ACCEPT)I/B
+ /(?C`a``b`)(?C'a''b')(?C"a""b")(?C^a^^b^)(?C%a%%b%)(?C#a##b#)(?C$a$$b$)(?C{a}}b})/B,callout_info
+ 0: /(?C`a``b`)(?C'a''b')(?C"a""b")(?C^a^^b^)(?C%a%%b%)(?C#a##b#)(?C$a$$b$)(?C{a}}b})/B,callout_info
+ /(?sx)(?(DEFINE)(?<assertion> (?&simple_assertion) | (?&lookaround) )(?<atomic_group> \( \? > (?®ex) \) )(?<back_reference> \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) )(?<branch> (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?"ed_string) | (?"ed_string_empty) | (?&special_escape) | (?&verb) )* )(?<callout> \(\?C (?: \d+ | (?: (?<D>["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) )(?<capturing_group> \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?®ex) \) )(?<character_class> \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )(?<character_type> (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )(?<class_item> (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?"ed_string) | (?"ed_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) )(?<comment> \(\?\# [^)]* \) | (?"ed_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}!"'`=_:;,%&@~]) (?®ex) \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> \(\? (?: = | ! | <= | <! ) (?®ex) \) )(?<non_capturing_group> \(\? [iJmnsUx-]* : (?®ex) \) )(?<option_setting> \(\? [iJmnsUx-]* \) )(?<qualified_item> (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?"ed_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> \( \? \| (?®ex) \) )(?<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)$/
+ 0: /(?sx)(?(DEFINE)(?<assertion> (?&simple_assertion) | (?&lookaround) )(?<atomic_group> \( \? > (?®ex) \) )(?<back_reference> \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) )(?<branch> (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?"ed_string) | (?"ed_string_empty) | (?&special_escape) | (?&verb) )* )(?<callout> \(\?C (?: \d+ | (?: (?<D>["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) )(?<capturing_group> \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?®ex) \) )(?<character_class> \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )(?<character_type> (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )(?<class_item> (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?"ed_string) | (?"ed_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) )(?<comment> \(\?\# [^)]* \) | (?"ed_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}!"'`=_:;,%&@~]) (?®ex) \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> \(\? (?: = | ! | <= | <! ) (?®ex) \) )(?<non_capturing_group> \(\? [iJmnsUx-]* : (?®ex) \) )(?<option_setting> \(\? [iJmnsUx-]* \) )(?<qualified_item> (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?"ed_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> \( \? \| (?®ex) \) )(?<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)$/
+\= Expect no match
+ /((?(?C'')\QX\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/
+No match
+ /(?:(?(2y)a|b)(X))+/
+No match
+ /a(*MARK)b/
+No match
+ /a(*CR)b/
+No match
+ /(?P<abn>(?P=abn)(?<badstufxxx)/
+No match
+
+# --------------------------------------------------------------------------
+
+/<(?x:[a b])>/xx
+ < >
+ 0: < >
+
+/<(?:[a b])>/xx
+ < >
+No match
+
+/<(?xxx:[a b])>/
+ < >
+No match
+
+/<(?-x:[a b])>/xx
+ < >
+ 0: < >
+
+/[[:digit:]-]+/
+ 12-24
+ 0: 12-24
+
+/((?<=((*ACCEPT)) )\1?\b) /
+\= Expect no match
+ ((?<=((*ACCEPT)) )\\1?\\b)\x20
+No match
+
+/((?<=((*ACCEPT))X)\1?Y)\1/
+ XYYZ
+ 0: YY
+ 1: Y
+ 2:
+
+/((?<=((*ACCEPT))X)\1?Y(*ACCEPT))\1/
+ XYYZ
+ 0: Y
+ 1: Y
+ 2:
+
+/(?(DEFINE)(?<optional_a>a?)X)^(?&optional_a)a$/
+ aa
+ 0: aa
+ a
+ 0: a
+
+/^(a?)b(?1)a/
+ abaa
+ 0: abaa
+ 1: a
+ aba
+ 0: aba
+ 1: a
+ baa
+ 0: baa
+ 1:
+ ba
+ 0: ba
+ 1:
+
+/^(a?)+b(?1)a/
+ abaa
+ 0: abaa
+ 1:
+ aba
+ 0: aba
+ 1:
+ baa
+ 0: baa
+ 1:
+ ba
+ 0: ba
+ 1:
+
+/^(a?)++b(?1)a/
+ abaa
+ 0: abaa
+ 1:
+ aba
+ 0: aba
+ 1:
+ baa
+ 0: baa
+ 1:
+ ba
+ 0: ba
+ 1:
+
+/^(a?)+b/
+ b
+ 0: b
+ 1:
+ ab
+ 0: ab
+ 1:
+ aaab
+ 0: aaab
+ 1:
+
+/(?=a+)a(a+)++b/
+ aab
+ 0: aab
+ 1: a
+
+/(?<=\G.)/g,aftertext
+ abc
+ 0:
+ 0+ bc
+ 0:
+ 0+ c
+ 0:
+ 0+
+
+/(?<=(?=.)?)/
+
+/(?<=(?=.)?+)/
+
+/(?<=(?=.)*)/
+
+/(?<=(?=.){4,5})/
+
+/(?<=(?=.){4,5}x)/
+
+/a(?=.(*:X))(*SKIP:X)(*F)|(.)/
+ abc
+ 0: a
+ 1: a
+
+/a(?>(*:X))(*SKIP:X)(*F)|(.)/
+ abc
+ 0: a
+ 1: a
+
+/a(?:(*:X))(*SKIP:X)(*F)|(.)/
+ abc
+ 0: b
+ 1: b
+
+#pattern no_start_optimize
+
+/(?>a(*:1))(?>b(*:1))(*SKIP:1)x|.*/
+ abc
+ 0: abc
+
+/(?>a(*:1))(?>b)(*SKIP:1)x|.*/
+ abc
+ 0: abc
+
+#subject mark
+
+/a(*ACCEPT:X)b/
+ abc
+ 0: a
+MK: X
+
+/(?=a(*ACCEPT:QQ)bc)axyz/
+ axyz
+ 0: axyz
+MK: QQ
+
+/(?(DEFINE)(a(*ACCEPT:X)))(?1)b/
+ abc
+ 0: ab
+MK: X
+
+/a(*F:X)b/
+ abc
+No match, mark = X
+
+/(?(DEFINE)(a(*F:X)))(?1)b/
+ abc
+No match, mark = X
+
+/a(*COMMIT:X)b/
+ abc
+ 0: ab
+MK: X
+
+/(?(DEFINE)(a(*COMMIT:X)))(?1)b/
+ abc
+ 0: ab
+MK: X
+
+/a+(*:Z)b(*COMMIT:X)(*SKIP:Z)c|.*/
+ aaaabd
+ 0: bd
+
+/a+(*:Z)b(*COMMIT:X)(*SKIP:X)c|.*/
+ aaaabd
+No match, mark = X
+
+/a(*COMMIT:X)b/
+ axabc
+No match, mark = X
+
+#pattern -no_start_optimize
+#subject -mark
+
+/(.COMMIT)(*COMMIT::::::::::interal error:::)/
+
+/(*COMMIT:ÿÿ)/
+
+/(*COMMIT:]w)/
+
+/(?i)A(?^)B(?^x:C D)(?^i)e f/
+ aBCDE F
+ 0: aBCDE F
+\= Expect no match
+ aBCDEF
+No match
+ AbCDe f
+No match
+
+# End of testinput1
projects / ossec-hids.git / blobdiff