# 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.sh script. # WARNING: Use only / as the pattern delimiter. Although pcre2test supports # a number of delimiters, all those other than / give problems with the # perltest.sh 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 /^\/ 0: \x81 /^/ 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]+)?)*$/ *.a 0: *.a *.b0-a 0: *.b0-a 1: 0-a *.c3-b.c 0: *.c3-b.c 1: 3-b 2: .c *.c-a.b-c 0: *.c-a.b-c 1: -a 2: .b-c 3: -c \= Expect no match *.0 No match *.a- No match *.a-b.c- No match *.c-a.0-c No match /^(?=ab(de))(abd)(e)/ abde 0: abde 1: de 2: abd 3: e /^(?!(ab)de|x)(abd)(f)/ abdf 0: abdf 1: 2: abd 3: f /^(?=(ab(cd)))(ab)/ abcd 0: ab 1: abcd 2: cd 3: ab /^[\da-f](\.[\da-f])*$/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: 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 0: Alan Other 0: user@dom.ain user\@dom.ain 0: user@dom.ain \"A. Other\" (a comment) 0: "A. Other" (a comment) A. Other (a comment) 0: Other (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 @,;:".\\\[\]\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 0: Alan Other 0: user@dom.ain user\@dom.ain 0: user@dom.ain \"A. Other\" (a comment) 0: "A. Other" A. Other (a comment) 0: Other \"/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 ?@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: /]{0,})>]{0,})>([\d]{0,}\.)(.*)((
([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is 43.Word Processor
(N-1286)Lega lstaff.comCA - Statewide 0: 43.Word Processor
(N-1286)Lega lstaff.comCA - Statewide 1: BGCOLOR='#DBE9E9' 2: align=left valign=top 3: 43. 4: Word Processor
(N-1286) 5: 6: 7: 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 /(?.*\/)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 /(?(?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 /(?<=(?]&/ <&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 /(?<=a)b/ ab 0: b \= Expect no match cb No match b No match /(? 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: 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}...)(? 2: 3: abcd 2: 3: abcd \s*)=(?>\s*) # find 2: 3: abcd 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 b/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(?:[a]|ae)r|ex)/ REGular 0: REGular regulaer 0: regulaer Regex 0: Regex regulr 0: regul\xe4r /[--]+/ 0: \xc5\xe6\xe5\xe4\xe0 0: \xc5\xe6\xe5\xe4\xff 0: \xc5\xe6\xe5\xe4\xc0 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 /(? 2: D 0: D 1: 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)(?>.*)(? 2: a /(?>(a))b|(a)c/ ac 0: ac 1: 2: a /(?=(a))ab|(a)c/ ac 0: ac 1: 2: a /((?>(a))b|(a)c)/ ac 0: ac 1: ac 2: 3: a /((?>(a))b|(a)c)++/ ac 0: ac 1: ac 2: 3: a /(?:(?>(a))b|(a)c)++/ ac 0: ac 1: 2: a /(?=(?>(a))b|(a)c)(..)/ ac 0: ac 1: 2: a 3: ac /(?>(?>(a))b|(a)c)/ ac 0: ac 1: 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]+/ ggg<<>> 0: ggg<<>> \= 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 /(?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 /(?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: 4: 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: 4: 5: c 6: d 7: Y /(?'abc'\w+):\k{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 /^(?a)? (?()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) (? b) ) (?&A) (?&B) /x abcd 0: ab /(?(?:(?:a(?&all))|(b))(c?))/ aabc 0: aabc 1: aabc 2: 3: /(a(b)|(c))(?1)/ abc 0: abc 1: ab 2: b cab 0: cab 1: c 2: 3: c /(?1)(a(b)|(c))/ abc 0: abc 1: c 2: 3: c cab 0: cab 1: ab 2: b /(?(?&NAME_PAT))\s+(?(?&ADDRESS_PAT)) (?(DEFINE) (?[a-z]+) (?\d+) )/x metcalfe 33 0: metcalfe 33 1: metcalfe 2: 33 /(?(DEFINE)(?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: 2: .4 131.111.10.206 0: 131.111.10.206 1: 2: .206 10.0.0.0 0: 10.0.0.0 1: 2: .0 \= Expect no match 10.6 No match 455.3.4.5 No match /\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?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>([^()]|\((?1)*\))*abc>123abc>123abc>1(2)3abc>1(2)3abc>(1(2)3)abc>(1(2)3) 2: 3: Satanoscillatemymetallicsonatas 4: S AmanaplanacanalPanama 0: AmanaplanacanalPanama 1: 2: 3: AmanaplanacanalPanama 4: A AblewasIereIsawElba 0: AblewasIereIsawElba 1: 2: 3: AblewasIereIsawElba 4: A \= Expect no match Thequickbrownfox No match /^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/ 12 0: 12 1: 12 (((2+2)*-3)-7) 0: (((2+2)*-3)-7) 1: (((2+2)*-3)-7) 2: - -12 0: -12 1: -12 \= Expect no match ((2+2)*-3)-7) No match /^(x(y|(?1){2})z)/ xyz 0: xyz 1: xyz 2: y xxyzxyzz 0: xxyzxyzz 1: xxyzxyzz 2: xyzxyz \= Expect no match xxyzz No match xxyzxyzxyzz No match /((< (?: (?(R) \d++ | [^<>]*+) | (?2)) * >))/x <> 0: <> 1: <> 2: <> 0: 1: 2: hij> 0: hij> 1: hij> 2: hij> hij> 0: 1: 2: def> 0: def> 1: def> 2: def> 0: <> 1: <> 2: <> \= Expect no match 2: 3: Satan, oscillate my metallic sonatas 4: S A man, a plan, a canal: Panama! 0: A man, a plan, a canal: Panama! 1: 2: 3: A man, a plan, a canal: Panama 4: A Able was I ere I saw Elba. 0: Able was I ere I saw Elba. 1: 2: 3: Able was I ere I saw Elba 4: A \= Expect no match The quick brown fox No match /^((.)(?1)\2|.)$/ 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 /(?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(? (?')|(?")) |b(? (?')|(?")) ) (?('quote')[a-z]+|[0-9]+)/x,dupnames a\"aaaaa 0: a"aaaaa 1: " 2: 3: " b\"aaaaa 0: b"aaaaa 1: 2: 3: 4: " 5: 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 /(? \( ( [^()]++ | (?&pn) )* \) )/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)(?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(?P0)(?P>L1)|(?P>L2))/ 0 0: 0 1: 0 00 0: 00 1: 00 2: 0 0000 0: 0000 1: 0000 2: 0 /(?P(?P0)|(?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)(?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(?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)(?a))\w$/ aaaaaaX 0: aaaaaaX \= Expect no match aaaaaa No match /^(?&t)*(?(DEFINE)(?a))\w$/ aaaaaaX 0: aaaaaaX aaaaaa 0: aaaaaa /^(a)*+(\w)/ aaaaX 0: aaaaX 1: a 2: X YZ 0: Y 1: 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: 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)(?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 /(? 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: 2: wxyz /(?>.*)(?<=(abcd)|(wxyz))/ alphabetabcd 0: alphabetabcd 1: abcd endingwxyz 0: endingwxyz 1: 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: 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(*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)(?b))/mark abc 0: b MK: m(m /(*PRUNE:m(m)(?&y)(?(DEFINE)(?b))/mark abc 0: b MK: m(m /(*SKIP:m(m)(?&y)(?(DEFINE)(?b))/mark abc 0: b /(*THEN:m(m)(?&y)(?(DEFINE)(?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 /(?:(?foo)|(?bar))\k/dupnames foofoo 0: foofoo 1: foo barbar 0: barbar 1: 2: bar /(?A)(?:(?foo)|(?bar))\k/dupnames AfooA 0: AfooA 1: A 2: foo AbarA 0: AbarA 1: A 2: 3: bar \= Expect no match Afoofoo No match Abarbar No match /^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/ 1 IN SOA non-sp1 non-sp2( 0: 1 IN SOA non-sp1 non-sp2( 1: 1 2: non-sp1 3: non-sp2 /^ (?:(?A)|(?'B'B)(?A)) (?('A')x) (?()y)$/x,dupnames Ax 0: Ax 1: A BAxy 0: BAxy 1: 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 /(?Pa)(?Pb)/g,dupnames abbaba 0: ab 1: a 2: b 0: ab 1: a 2: b /(?Pa)(?Pb)(?P=same)/g,dupnames abbaba 0: aba 1: a 2: b /(?P=same)?(?Pa)(?Pb)/g,dupnames abbaba 0: ab 1: a 2: b 0: ab 1: a 2: b /(?:(?P=same)?(?:(?P=same)(?Pa)(?P=same)|(?P=same)?(?Pb)(?P=same)){2}(?P=same)(?Pc)(?P=same)){2}(?Pz)?/g,dupnames \= Expect no match bbbaaaccccaaabbbcc No match /(?Pa)?(?Pb)?(?()c|d)*l/ acl 0: acl 1: a bdl 0: bdl 1: 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: 2: 3: 4: 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 /(?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$/ \ X 0: X /(?s)(?=.*?)b/ aabc 0: b /(Z)(a)\2{1,2}?(?-i)\1X/i ZaAAZX 0: ZaAAZX 1: Z 2: a /(?'c')XX(?'YYYYYYYYYYYYYYYYYYYYYYYCl')/ /[s[:digit:]\E-H]+/ s09-H 0: s09-H /[s[:digit:]\Q\E-H]+/ s09-H 0: s09-H /a+(?:|b)a/ aaaa 0: aaaa /X?(R||){3335}/ /(?1)(A(*COMMIT)|B)D/ ABD 0: ABD 1: B XABD 0: ABD 1: B BAD 0: BAD 1: A ABXABD 0: ABD 1: B \= Expect no match ABX No match /(?(DEFINE)(? 1? (?=(?2)?) 1 2 (?('cond')|3))) \A () (?&m) \Z/x 123 0: 123 1: 2: 3: /^(?: (?: A| (1? (?=(?2)?) (1) 2 (?('cond')|3)) ) (Z) )+$/x AZ123Z 0: AZ123Z 1: 123 2: 3: 1 4: Z \= Expect no match AZ12Z No match /^ (?(DEFINE) ( (?!(a)\2b)..) ) ()(?1) /x acb 0: ac 1: 2: 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 # 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 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) (? (?&local_part) \@ (?&domain) ) (? (?&CFWS)?+ < (?&addr_spec) > (?&CFWS)?+ ) (? [a-z\d!#\$%&'*+-\x{2f}=?^_`{|}~] ) (? (?&CFWS)?+ (?&atext)+ (?&CFWS)?+ ) (? (?&ctext) | (?"ed_pair) | (?&comment) ) (? [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ ()\\] ) (? \( (?: (?&FWS)?+ (?&ccontent) )*+ (?&FWS)?+ \) ) (? (?: (?&FWS)?+ (?&comment) )* (?# NOT possessive) (?: (?&FWS)?+ (?&comment) | (?&FWS) ) ) (? (?&dtext) | (?"ed_pair) ) (? (?&phrase) ) (? (?&dot_atom) | (?&domain_literal) ) (? (?&CFWS)?+ \[ (?: (?&FWS)?+ (?&dcontent) )* (?&FWS)?+ \] (?&CFWS)?+ ) (? (?&CFWS)?+ (?&dot_atom_text) (?&CFWS)?+ ) (? (?&atext)++ (?: \. (?&atext)++)*+ ) (? [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ \[\]\\] ) (? (?: [\t\ ]*+ \n)?+ [\t\ ]++ ) (? (?&dot_atom) | (?"ed_string) ) (? (?&name_addr) | (?&addr_spec) ) (? (?&display_name)? (?&angle_addr) ) (? (?&word)++ ) (? (?&qtext) | (?"ed_pair) ) (? " (?&text) ) (? (?&CFWS)?+ " (?: (?&FWS)?+ (?&qcontent))* (?&FWS)?+ " (?&CFWS)?+ ) (? [^\x{9}\x{10}\x{13}\x{7f}-\x{ff}\ "\\] ) (? [^\r\n] ) (? (?&atom) | (?"ed_string) ) ) # End DEFINE ^(?&mailbox)$/ Alan Other 0: Alan Other 0: 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\" (a comment) 0: "A. Other" (a comment) A. Other (a comment) 0: A. Other (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 (?&simple_assertion) | (?&lookaround) ) (? \( \? > (?®ex) \) ) (? \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) ) (? (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?"ed_string) | (?"ed_string_empty) | (?&special_escape) | (?&verb) )* ) (? \(\?C (?: \d+ | (?: (?["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) ) (? \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?®ex) \) ) (? \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] ) (? (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] ) (? (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?"ed_string) | (?"ed_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) ) (? \(\?\# [^)]* \) | (?"ed_string_empty) | \\E ) (? (?: \( [+-]? \d+ \) | \( < (?&groupname) > \) | \( ' (?&groupname) ' \) | \( R \d* \) | \( R & (?&groupname) \) | \( (?&groupname) \) | \( DEFINE \) | \( VERSION >?=\d+(?:\.\d\d?)? \) | (?&callout)?+ (?&comment)* (?&lookaround) ) ) (? \(\? (?&condition) (?&branch) (?: \| (?&branch) )? \) ) (? (? [-\x{2f}!"'`=_:;,%&@~]) (?®ex) \k'delimiter' .* ) (? \\ (?: 0[0-7]{1,2} | [0-7]{1,3} | o\{ [0-7]+ \} | x \{ (*COMMIT) [[:xdigit:]]* \} | x [[:xdigit:]]{0,2} | [aefnrt] | c[[:print:]] | [^[:alnum:]] ) ) (? (?&capturing_group) | (?&non_capturing_group) | (?&resetting_group) | (?&atomic_group) | (?&conditional_group) ) (? [a-zA-Z_]\w* ) (? (?! (?&range_qualifier) ) [^[()|*+?.\$\\] ) (? \(\? (?: = | ! | <= | \(\? [iJmnsUx-]* : (?®ex) \) ) (? \(\? [iJmnsUx-]* \) ) (? (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?"ed_string) ) (?&comment)? (?&qualifier)? ) (? (?: [?*+] | (?&range_qualifier) ) [+?]? ) (? (?: \\Q (?: (?!\\E | \k'delimiter') . )++ (?: \\E | ) ) ) (? \\Q\\E ) (? \{ (?: \d+ (?: , \d* )? | , \d+ ) \} ) (? (?&start_item)* (?&branch) (?: \| (?&branch) )* ) (? \( \? \| (?®ex) \) ) (? \^ | \$ | \\A | \\b | \\B | \\G | \\z | \\Z ) (? \\K ) (? \( \* (?: ANY | ANYCRLF | BSR_ANYCRLF | BSR_UNICODE | CR | CRLF | LF | LIMIT_MATCH=\d+ | LIMIT_DEPTH=\d+ | LIMIT_HEAP=\d+ | NOTEMPTY | NOTEMPTY_ATSTART | NO_AUTO_POSSESS | NO_DOTSTAR_ANCHOR | NO_JIT | NO_START_OPT | NUL | UTF | UCP ) \) ) (? (?: \(\?R\) | \(\?[+-]?\d+\) | \(\? (?: & | P> ) (?&groupname) \) | \\g < (?&groupname) > | \\g ' (?&groupname) ' | \\g < [+-]? \d+ > | \\g ' [+-]? \d+ ) ) (? \(\* (?: ACCEPT | FAIL | F | COMMIT | (?:MARK)?:(?&verbname) | (?:PRUNE|SKIP|THEN) (?: : (?&verbname)? )? ) \) ) (? [^)]+ ) ) # 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$/ /(cat(a(ract|tonic)|erpillar)) \1()2(3)/ 0: /(cat(a(ract|tonic)|erpillar)) \1()2(3)/ /^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/ 0: /^From +([^ ]+) +[a-zA-Z][a-zA-Z][a-zA-Z] +[a-zA-Z][a-zA-Z][a-zA-Z] +[0-9]?[0-9] +[0-9][0-9]:[0-9][0-9]/ /^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/ 0: /^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/ /]{0,})>]{0,})>([\d]{0,}\.)(.*)((
([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is 0: /]{0,})>]{0,})>([\d]{0,}\.)(.*)((
([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is /^(?(DEFINE) (? a) (? b) ) (?&A) (?&B) / 0: /^(?(DEFINE) (? a) (? b) ) (?&A) (?&B) / /(?(DEFINE)(?2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/ 0: /(?(DEFINE)(?2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))\b(?&byte)(\.(?&byte)){3}/ /\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/ 0: /\b(?&byte)(\.(?&byte)){3}(?(DEFINE)(?2[0-4]\d|25[0-5]|1\d\d|[1-9]?\d))/ /^(\w++|\s++)*$/ 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)(? (?&simple_assertion) | (?&lookaround) )(? \( \? > (?®ex) \) )(? \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) )(? (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?"ed_string) | (?"ed_string_empty) | (?&special_escape) | (?&verb) )* )(? \(\?C (?: \d+ | (?: (?["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) )(? \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?®ex) \) )(? \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )(? (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )(? (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?"ed_string) | (?"ed_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) )(? \(\?\# [^)]* \) | (?"ed_string_empty) | \\E )(? (?: \( [+-]? \d+ \) | \( < (?&groupname) > \) | \( ' (?&groupname) ' \) | \( R \d* \) | \( R & (?&groupname) \) | \( (?&groupname) \) | \( DEFINE \) | \( VERSION >?=\d+(?:\.\d\d?)? \) | (?&callout)?+ (?&comment)* (?&lookaround) ) )(? \(\? (?&condition) (?&branch) (?: \| (?&branch) )? \) )(? (? [-\x{2f}!"'`=_:;,%&@~]) (?®ex) \k'delimiter' .* )(? \\ (?: 0[0-7]{1,2} | [0-7]{1,3} | o\{ [0-7]+ \} | x \{ (*COMMIT) [[:xdigit:]]* \} | x [[:xdigit:]]{0,2} | [aefnrt] | c[[:print:]] | [^[:alnum:]] ) )(? (?&capturing_group) | (?&non_capturing_group) | (?&resetting_group) | (?&atomic_group) | (?&conditional_group) )(? [a-zA-Z_]\w* )(? (?! (?&range_qualifier) ) [^[()|*+?.\$\\] )(? \(\? (?: = | ! | <= | \(\? [iJmnsUx-]* : (?®ex) \) )(? \(\? [iJmnsUx-]* \) )(? (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?"ed_string) ) (?&comment)? (?&qualifier)? )(? (?: [?*+] | (?&range_qualifier) ) [+?]? )(? (?: \\Q (?: (?!\\E | \k'delimiter') . )++ (?: \\E | ) ) ) (? \\Q\\E ) (? \{ (?: \d+ (?: , \d* )? | , \d+ ) \} )(? (?&start_item)* (?&branch) (?: \| (?&branch) )* )(? \( \? \| (?®ex) \) )(? \^ | \$ | \\A | \\b | \\B | \\G | \\z | \\Z )(? \\K )(? \( \* (?: ANY | ANYCRLF | BSR_ANYCRLF | BSR_UNICODE | CR | CRLF | LF | LIMIT_MATCH=\d+ | LIMIT_DEPTH=\d+ | LIMIT_HEAP=\d+ | NOTEMPTY | NOTEMPTY_ATSTART | NO_AUTO_POSSESS | NO_DOTSTAR_ANCHOR | NO_JIT | NO_START_OPT | NUL | UTF | UCP ) \) )(? (?: \(\?R\) | \(\?[+-]?\d+\) | \(\? (?: & | P> ) (?&groupname) \) | \\g < (?&groupname) > | \\g ' (?&groupname) ' | \\g < [+-]? \d+ > | \\g ' [+-]? \d+ ) )(? \(\* (?: ACCEPT | FAIL | F | COMMIT | (?:MARK)?:(?&verbname) | (?:PRUNE|SKIP|THEN) (?: : (?&verbname)? )? ) \) )(? [^)]+ ))^(?&delimited_regex)$/ 0: /(?sx)(?(DEFINE)(? (?&simple_assertion) | (?&lookaround) )(? \( \? > (?®ex) \) )(? \\ \d+ | \\g (?: [+-]?\d+ | \{ (?: [+-]?\d+ | (?&groupname) ) \} ) | \\k <(?&groupname)> | \\k '(?&groupname)' | \\k \{ (?&groupname) \} | \( \? P= (?&groupname) \) )(? (?:(?&assertion) | (?&callout) | (?&comment) | (?&option_setting) | (?&qualified_item) | (?"ed_string) | (?"ed_string_empty) | (?&special_escape) | (?&verb) )* )(? \(\?C (?: \d+ | (?: (?["'`^%\#\$]) (?: \k'D'\k'D' | (?!\k'D') . )* \k'D' | \{ (?: \}\} | [^}]*+ )* \} ) )? \) )(? \( (?: \? P? < (?&groupname) > | \? ' (?&groupname) ' )? (?®ex) \) )(? \[ \^?+ (?: \] (?&class_item)* | (?&class_item)+ ) \] )(? (?! \\N\{\w+\} ) \\ [dDsSwWhHvVRN] )(? (?: \[ : (?: alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print| punct|space|upper|word|xdigit ) : \] | (?"ed_string) | (?"ed_string_empty) | (?&escaped_character) | (?&character_type) | [^]] ) )(? \(\?\# [^)]* \) | (?"ed_string_empty) | \\E )(? (?: \( [+-]? \d+ \) | \( < (?&groupname) > \) | \( ' (?&groupname) ' \) | \( R \d* \) | \( R & (?&groupname) \) | \( (?&groupname) \) | \( DEFINE \) | \( VERSION >?=\d+(?:\.\d\d?)? \) | (?&callout)?+ (?&comment)* (?&lookaround) ) )(? \(\? (?&condition) (?&branch) (?: \| (?&branch) )? \) )(? (? [-\x{2f}!"'`=_:;,%&@~]) (?®ex) \k'delimiter' .* )(? \\ (?: 0[0-7]{1,2} | [0-7]{1,3} | o\{ [0-7]+ \} | x \{ (*COMMIT) [[:xdigit:]]* \} | x [[:xdigit:]]{0,2} | [aefnrt] | c[[:print:]] | [^[:alnum:]] ) )(? (?&capturing_group) | (?&non_capturing_group) | (?&resetting_group) | (?&atomic_group) | (?&conditional_group) )(? [a-zA-Z_]\w* )(? (?! (?&range_qualifier) ) [^[()|*+?.\$\\] )(? \(\? (?: = | ! | <= | \(\? [iJmnsUx-]* : (?®ex) \) )(? \(\? [iJmnsUx-]* \) )(? (?:\. | (?&lookaround) | (?&back_reference) | (?&character_class) | (?&character_type) | (?&escaped_character) | (?&group) | (?&subroutine_call) | (?&literal_character) | (?"ed_string) ) (?&comment)? (?&qualifier)? )(? (?: [?*+] | (?&range_qualifier) ) [+?]? )(? (?: \\Q (?: (?!\\E | \k'delimiter') . )++ (?: \\E | ) ) ) (? \\Q\\E ) (? \{ (?: \d+ (?: , \d* )? | , \d+ ) \} )(? (?&start_item)* (?&branch) (?: \| (?&branch) )* )(? \( \? \| (?®ex) \) )(? \^ | \$ | \\A | \\b | \\B | \\G | \\z | \\Z )(? \\K )(? \( \* (?: ANY | ANYCRLF | BSR_ANYCRLF | BSR_UNICODE | CR | CRLF | LF | LIMIT_MATCH=\d+ | LIMIT_DEPTH=\d+ | LIMIT_HEAP=\d+ | NOTEMPTY | NOTEMPTY_ATSTART | NO_AUTO_POSSESS | NO_DOTSTAR_ANCHOR | NO_JIT | NO_START_OPT | NUL | UTF | UCP ) \) )(? (?: \(\?R\) | \(\?[+-]?\d+\) | \(\? (?: & | P> ) (?&groupname) \) | \\g < (?&groupname) > | \\g ' (?&groupname) ' | \\g < [+-]? \d+ > | \\g ' [+-]? \d+ ) )(? \(\* (?: ACCEPT | FAIL | F | COMMIT | (?:MARK)?:(?&verbname) | (?:PRUNE|SKIP|THEN) (?: : (?&verbname)? )? ) \) )(? [^)]+ ))^(?&delimited_regex)$/ \= Expect no match /((?(?C'')\QX\E(?!((?(?C'')(?!X=X));=)r*X=X));=)/ No match /(?:(?(2y)a|b)(X))+/ No match /a(*MARK)b/ No match /a(*CR)b/ No match /(?P(?P=abn)(?/xx < > 0: < > /<(?:[a b])>/xx < > No match /<(?xxx:[a b])>/ < > No match /<(?-x:[a b])>/xx < > 0: < > /[[:digit:]-]+/ 12-24 0: 12-24 /((?<=((*ACCEPT)) )\1?\b) / \= Expect no match ((?<=((*ACCEPT)) )\\1?\\b)\x20 No match /((?<=((*ACCEPT))X)\1?Y)\1/ XYYZ 0: YY 1: Y 2: /((?<=((*ACCEPT))X)\1?Y(*ACCEPT))\1/ XYYZ 0: Y 1: Y 2: /(?(DEFINE)(?a?)X)^(?&optional_a)a$/ 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:)/ /(*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 /(*pla:foo).{6}/ abcfoobarxyz 0: foobar \= Expect no match abcfooba No match /(*positive_lookahead:foo).{6}/ abcfoobarxyz 0: foobar /(?(*pla:foo).{6}|a..)/ foobarbaz 0: foobar abcfoobar 0: abc /(?(*positive_lookahead:foo).{6}|a..)/ foobarbaz 0: foobar abcfoobar 0: abc /(*plb:foo)bar/ abcfoobar 0: bar \= Expect no match abcbarfoo No match /(*positive_lookbehind:foo)bar/ abcfoobar 0: bar \= Expect no match abcbarfoo No match /(?(*plb:foo)bar|baz)/ abcfoobar 0: bar bazfoobar 0: baz abcbazfoobar 0: baz foobazfoobar 0: bar /(?(*positive_lookbehind:foo)bar|baz)/ abcfoobar 0: bar bazfoobar 0: baz abcbazfoobar 0: baz foobazfoobar 0: bar /(*nlb:foo)bar/ abcbarfoo 0: bar \= Expect no match abcfoobar No match /(*negative_lookbehind:foo)bar/ abcbarfoo 0: bar \= Expect no match abcfoobar No match /(?(*nlb:foo)bar|baz)/ abcfoobaz 0: baz abcbarbaz 0: bar \= Expect no match abcfoobar No match /(?(*negative_lookbehind:foo)bar|baz)/ abcfoobaz 0: baz abcbarbaz 0: bar \= Expect no match abcfoobar No match /(*atomic:a+)\w/ aaab 0: aaab \= Expect no match aaaa No match / (? \w+ )* \. /xi pokus. 0: pokus. 1: pokus /(?(DEFINE) (? \w+ ) ) (?&word)* \./xi pokus. 0: pokus. /(?(DEFINE) (? \w+ ) ) ( (?&word)* ) \./xi pokus. 0: pokus. 1: 2: pokus /(?&word)* (?(DEFINE) (? \w+ ) ) \./xi pokus. 0: pokus. /(?&word)* \. (? \w+ )/xi pokus.hokus 0: pokus.hokus 1: hokus /a(?(?=(*:2)b).)/mark abc 0: ab MK: 2 acb 0: a /a(?(?!(*:2)b).)/mark acb 0: ac abc 0: a MK: 2 /(?:a|ab){1}+c/ \= Expect no match abc No match /(a|ab){1}+c/ abc No match /(a+){1}+a/ \= Expect no match aaaa No match /(?(DEFINE)(a|ab))(?1){1}+c/ abc No match /(?:a|(?=b)|.)*\z/ abc 0: abc /(?:a|(?=b)|.)*/ abc 0: a /(?<=a(*SKIP)x)|c/ abcd No match /(?<=a(*SKIP)x)|d/ abcd 0: d /(?<=(?=.(?<=x)))/aftertext abx 0: 0+ x /(?<=(?=(?<=a)))b/ ab 0: b /^(?a)(?()b)((?<=b).*)$/ abc 0: abc 1: a 2: c /^(a\1?){4}$/ aaaa 0: aaaa 1: a aaaaaa 0: aaaaaa 1: aa /^((\1+)|\d)+133X$/ 111133X 0: 111133X 1: 11 2: 11 /^(?>.*?([A-Z])(?!.*\1)){26}/i The quick brown fox jumps over the lazy dog. 0: The quick brown fox jumps over the lazy dog 1: g Jackdaws love my big sphinx of quartz. 0: Jackdaws love my big sphinx of quartz 1: z Pack my box with five dozen liquor jugs. 0: Pack my box with five dozen liquor jugs 1: s \= Expect no match The quick brown fox jumps over the lazy cat. No match Hackdaws love my big sphinx of quartz. No match Pack my fox with five dozen liquor jugs. No match /(?<=X(?(DEFINE)(A)))X(*F)/ \= Expect no match AXYZ No match /(?<=X(?(DEFINE)(A)))./ AXYZ 0: Y /(?<=X(?(DEFINE)(.*))Y)./ AXYZ 0: Z /(?<=X(?(DEFINE)(Y))(?1))./ AXYZ 0: Z /(?(DEFINE)(?bar))(?\x{8c}748364< 0: \x8c748364 /a{65536/ >a{65536< 0: a{65536 /a\K.(?0)*/ abac 0: c /(a\K.(?1)*)/ abac 0: c 1: abac # -------------------------------------------------------------------------- # Perl-compatible tests of variable-length lookbehinds. /(?<=ab?c).../g abcdefgacxyz 0: def 0: xyz /(?<=PQR|ab?c).../g abcdefgacxyzPQR123 0: def 0: xyz 0: 123 /(?<=ab?c|PQR).../g abcdefgacxyzPQR123 0: def 0: xyz 0: 123 /(?<=PQ|ab?c).../g abcdefgacxyzPQR123 0: def 0: xyz 0: R12 /(?<=ab?c|PQ).../g abcdefgacxyzPQR123 0: def 0: xyz 0: R12 /(?<=a(b?c|d?e?e)f)X./g acfX1zzzaefX2zzzadeefX3zzzX4zzz 0: X1 1: c 0: X2 1: e 0: X3 1: dee /(?)?(?1)??\)|\(\?(?:R|[+-]?\d+)\))(?:(?:[?+*]|\{\d+(?:,\d*)?\})[?+]?)?|\|)*)$/ # This is not very readable, and also does not handle all features. I have done # some work on it. /^ (? # A regular expression is zero or more of these items. (?: # An item is one of these: (?: [^?+*{}()\[\]\\|]++| # Non-meta characters or unquoted . \\.| # Quoted . \[ # Class, which is [ (?: # Followed by \^?\\.| # Optional ^ and any escaped character \^[^\\]| # OR ^ and not escaped character [^\\^] # OR neither ^ nor \ ) # Followed by (?:[^\]\\]+|\\.)*+ # Zero or more (not ] or \) OR escaped dot \]| # Class ends with ] \( # Parenthesized group (?: # Start with optional \?[:=!]| # ? followed by : = ! \?<[=!]| # OR ?< followed by = or ! \?> # OR ?> )? (?&re)?? # Then a nested \)| # End parenthesized group \(\? # Other parenthesized items (?: # (? followed by R| # R [+-]?\d++ # Or optional +- and digits ) \)| # End parens \(\* # Verbs (?: COMMIT| FAIL| MARK:[^)]*| (?:PRUNE|SKIP|THEN)(?::[^\)]*+)? ) \) ) # End list of items # Followed by an optional quantifier (?: (?: [?+*] # ?+* | # OR \{\d+ # { digits (?:,\d*)? # optionally followed by ,digits \} # then closing } | # OR \{,\d+} # {,digits} ) [?+]? # optional ungreedy or possessive )? | # OR an "item" is a branch ending \| )* # Zero or more top-level items. ) # End regex group. $/x [abcdef] 0: [abcdef] 1: [abcdef] [abc\\]def] 0: [abc\]def] 1: [abc\]def] a.b|abcd 0: a.b|abcd 1: a.b|abcd ab()d 0: ab()d 1: ab()d ab{1,3}d 0: ab{1,3}d 1: ab{1,3}d ab{,3}d 0: ab{,3}d 1: ab{,3}d ab(*FAIL)d(*COMMIT)(*SKIP)(*THEN:abc) 0: ab(*FAIL)d(*COMMIT)(*SKIP)(*THEN:abc) 1: ab(*FAIL)d(*COMMIT)(*SKIP)(*THEN:abc) ab(*MARK:xyz) 0: ab(*MARK:xyz) 1: ab(*MARK:xyz) (?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[,;:])(?=.{8,16})(?!.*[\\s]) 0: (?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[,;:])(?=.{8,16})(?!.*[\s]) 1: (?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*[,;:])(?=.{8,16})(?!.*[\s]) abcd\\t\\n\\r\\f\\a\\e\\071\\x3b\\^\\\\\\?caxyz 0: abcd\t\n\r\f\a\e\071\x3b\^\\\?caxyz 1: abcd\t\n\r\f\a\e\071\x3b\^\\\?caxyz a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz 0: a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz 1: a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz \\G(?:(?=(\\1.|)(.))){1,13}?(?!.*\\2.*\\2)\\1\\K\\2 0: \G(?:(?=(\1.|)(.))){1,13}?(?!.*\2.*\2)\1\K\2 1: \G(?:(?=(\1.|)(.))){1,13}?(?!.*\2.*\2)\1\K\2 \= Expect no match ab)d No match ab(d No match {4,5} No match a[]b No match (a)(?(1)a|b|c) No match /^..A(*SKIP)B|C/ 12ADC 0: C /(?