abc abc y $& abc abc abc y $-[0] 0 abc abc y $+[0] 3 abc xbc n - - abc axc n - - abc abx n - - abc xabcy y $& abc abc xabcy y $-[0] 1 abc xabcy y $+[0] 4 abc ababc y $& abc abc ababc y $-[0] 2 abc ababc y $+[0] 5 ab*c abc y $& abc ab*c abc y $-[0] 0 ab*c abc y $+[0] 3 ab*bc abc y $& abc ab*bc abc y $-[0] 0 ab*bc abc y $+[0] 3 ab*bc abbc y $& abbc ab*bc abbc y $-[0] 0 ab*bc abbc y $+[0] 4 ab*bc abbbbc y $& abbbbc ab*bc abbbbc y $-[0] 0 ab*bc abbbbc y $+[0] 6 .{1} abbbbc y $& a .{1} abbbbc y $-[0] 0 .{1} abbbbc y $+[0] 1 .{3,4} abbbbc y $& abbb .{3,4} abbbbc y $-[0] 0 .{3,4} abbbbc y $+[0] 4 ab{0,}bc abbbbc y $& abbbbc ab{0,}bc abbbbc y $-[0] 0 ab{0,}bc abbbbc y $+[0] 6 ab+bc abbc y $& abbc ab+bc abbc y $-[0] 0 ab+bc abbc y $+[0] 4 ab+bc abc n - - ab+bc abq n - - ab{1,}bc abq n - - ab+bc abbbbc y $& abbbbc ab+bc abbbbc y $-[0] 0 ab+bc abbbbc y $+[0] 6 ab{1,}bc abbbbc y $& abbbbc ab{1,}bc abbbbc y $-[0] 0 ab{1,}bc abbbbc y $+[0] 6 ab{1,3}bc abbbbc y $& abbbbc ab{1,3}bc abbbbc y $-[0] 0 ab{1,3}bc abbbbc y $+[0] 6 ab{3,4}bc abbbbc y $& abbbbc ab{3,4}bc abbbbc y $-[0] 0 ab{3,4}bc abbbbc y $+[0] 6 ab{4,5}bc abbbbc n - - ab?bc abbc y $& abbc ab?bc abc y $& abc ab{0,1}bc abc y $& abc ab?bc abbbbc n - - ab?c abc y $& abc ab{0,1}c abc y $& abc ^abc$ abc y $& abc ^abc$ abcc n - - ^abc abcc y $& abc ^abc$ aabc n - - abc$ aabc y $& abc abc$ aabcd n - - ^ abc y $& $ abc y $& a.c abc y $& abc a.c axc y $& axc a.*c axyzc y $& axyzc a.*c axyzd n - - a[bc]d abc n - - a[bc]d abd y $& abd a[b]d abd y $& abd [a][b][d] abd y $& abd .[b]. abd y $& abd .[b]. aBd n - - (?i:.[b].) abd y $& abd a[b-d]e abd n - - a[b-d]e ace y $& ace a[b-d] aac y $& ac a[-b] a- y $& a- a[b-] a- y $& a- a[b-a] - c - Invalid [] range \"b-a\" a[]b - c - Unmatched [ a[ - c - Unmatched [ a] a] y $& a] a[]]b a]b y $& a]b a[^bc]d aed y $& aed a[^bc]d abd n - - a[^-b]c adc y $& adc a[^-b]c a-c n - - a[^]b]c a]c n - - a[^]b]c adc y $& adc \ba\b a- y - - \ba\b -a y - - \ba\b -a- y - - \by\b xy n - - \by\b yz n - - \by\b xyz n - - \Ba\B a- n - - \Ba\B -a n - - \Ba\B -a- n - - \By\b xy y - - \By\b xy y $-[0] 1 \By\b xy y $+[0] 2 \By\b xy y - - \by\B yz y - - \By\B xyz y - - \w a y - - \w - n - - \W a n - - \W - y - - a\sb a b y - - a\sb a-b n - - a\Sb a b n - - a\Sb a-b y - - \d 1 y - - \d - n - - \D 1 n - - \D - y - - [\w] a y - - [\w] - n - - [\W] a n - - [\W] - y - - a[\s]b a b y - - a[\s]b a-b n - - a[\S]b a b n - - a[\S]b a-b y - - [\d] 1 y - - [\d] - n - - [\D] 1 n - - [\D] - y - - ab|cd abc y $& ab ab|cd abcd y $& ab ()ef def y $&-$1 ef- ()ef def y $-[0] 1 ()ef def y $+[0] 3 ()ef def y $-[1] 1 ()ef def y $+[1] 1 *a - c - Quantifier follows nothing (|*)b - c - Quantifier follows nothing (*)b - c - Unknown verb $b b n - - a\ - c - Search pattern not terminated a\(b a(b y $&-$1 a(b- a\(*b ab y $& ab a\(*b a((b y $& a((b a\\b a\\b y $& a\\b abc) - c - Unmatched ) (abc - c - Unmatched ( ((a)) abc y $&-$1-$2 a-a-a ((a)) abc y $-[0]-$-[1]-$-[2] 0-0-0 ((a)) abc y $+[0]-$+[1]-$+[2] 1-1-1 ((a)) abc b @- 0 0 0 ((a)) abc b @+ 1 1 1 (a)b(c) abc y $&-$1-$2 abc-a-c (a)b(c) abc y $-[0]-$-[1]-$-[2] 0-0-2 (a)b(c) abc y $+[0]-$+[1]-$+[2] 3-1-3 a+b+c aabbabc y $& abc a{1,}b{1,}c aabbabc y $& abc a** - c - Nested quantifiers a.+?c abcabc y $& abc (a+|b)* ab y $&-$1 ab-b (a+|b)* ab y $-[0] 0 (a+|b)* ab y $+[0] 2 (a+|b)* ab y $-[1] 1 (a+|b)* ab y $+[1] 2 (a+|b){0,} ab y $&-$1 ab-b (a+|b)+ ab y $&-$1 ab-b (a+|b){1,} ab y $&-$1 ab-b (a+|b)? ab y $&-$1 a-a (a+|b){0,1} ab y $&-$1 a-a )( - c - Unmatched ) [^ab]* cde y $& cde abc n - - a* y $& ([abc])*d abbbcd y $&-$1 abbbcd-c ([abc])*bcd abcd y $&-$1 abcd-a a|b|c|d|e e y $& e (a|b|c|d|e)f ef y $&-$1 ef-e (a|b|c|d|e)f ef y $-[0] 0 (a|b|c|d|e)f ef y $+[0] 2 (a|b|c|d|e)f ef y $-[1] 0 (a|b|c|d|e)f ef y $+[1] 1 abcd*efg abcdefg y $& abcdefg ab* xabyabbbz y $& ab ab* xayabbbz y $& a (ab|cd)e abcde y $&-$1 cde-cd [abhgefdc]ij hij y $& hij ^(ab|cd)e abcde n x$1y xy (abc|)ef abcdef y $&-$1 ef- (a|b)c*d abcd y $&-$1 bcd-b (ab|ab*)bc abc y $&-$1 abc-a a([bc]*)c* abc y $&-$1 abc-bc a([bc]*)(c*d) abcd y $&-$1-$2 abcd-bc-d a([bc]*)(c*d) abcd y $-[0] 0 a([bc]*)(c*d) abcd y $+[0] 4 a([bc]*)(c*d) abcd y $-[1] 1 a([bc]*)(c*d) abcd y $+[1] 3 a([bc]*)(c*d) abcd y $-[2] 3 a([bc]*)(c*d) abcd y $+[2] 4 a([bc]+)(c*d) abcd y $&-$1-$2 abcd-bc-d a([bc]*)(c+d) abcd y $&-$1-$2 abcd-b-cd a([bc]*)(c+d) abcd y $-[0] 0 a([bc]*)(c+d) abcd y $+[0] 4 a([bc]*)(c+d) abcd y $-[1] 1 a([bc]*)(c+d) abcd y $+[1] 2 a([bc]*)(c+d) abcd y $-[2] 2 a([bc]*)(c+d) abcd y $+[2] 4 a[bcd]*dcdcde adcdcde y $& adcdcde a[bcd]+dcdcde adcdcde n - - (ab|a)b*c abc y $&-$1 abc-ab (ab|a)b*c abc y $-[0] 0 (ab|a)b*c abc y $+[0] 3 (ab|a)b*c abc y $-[1] 0 (ab|a)b*c abc y $+[1] 2 ((a)(b)c)(d) abcd y $1-$2-$3-$4 abc-a-b-d ((a)(b)c)(d) abcd y $-[0] 0 ((a)(b)c)(d) abcd y $+[0] 4 ((a)(b)c)(d) abcd y $-[1] 0 ((a)(b)c)(d) abcd y $+[1] 3 ((a)(b)c)(d) abcd y $-[2] 0 ((a)(b)c)(d) abcd y $+[2] 1 ((a)(b)c)(d) abcd y $-[3] 1 ((a)(b)c)(d) abcd y $+[3] 2 ((a)(b)c)(d) abcd y $-[4] 3 ((a)(b)c)(d) abcd y $+[4] 4 [a-zA-Z_][a-zA-Z0-9_]* alpha y $& alpha ^a(bc+|b[eh])g|.h$ abh y $&-$1 bh- (bc+d$|ef*g.|h?i(j|k)) effgz y $&-$1-$2 effgz-effgz- (bc+d$|ef*g.|h?i(j|k)) ij y $&-$1-$2 ij-ij-j (bc+d$|ef*g.|h?i(j|k)) effg n - - (bc+d$|ef*g.|h?i(j|k)) bcdd n - - (bc+d$|ef*g.|h?i(j|k)) reffgz y $&-$1-$2 effgz-effgz- ((((((((((a)))))))))) a y $10 a ((((((((((a)))))))))) a y $-[0] 0 ((((((((((a)))))))))) a y $+[0] 1 ((((((((((a)))))))))) a y $-[10] 0 ((((((((((a)))))))))) a y $+[10] 1 ((((((((((a))))))))))\10 aa y $& aa ((((((((((a))))))))))${bang} aa n - - ((((((((((a))))))))))${bang} a! y $& a! (((((((((a))))))))) a y $& a multiple words of text uh-uh n - - multiple words multiple words, yeah y $& multiple words (.*)c(.*) abcde y $&-$1-$2 abcde-ab-de \((.*), (.*)\) (a, b) y ($2, $1) (b, a) [k] ab n - - abcd abcd y $&-\$&-\\$& abcd-\$&-\\abcd a(bc)d abcd y $1-\$1-\\$1 bc-\$1-\\bc a[-]?c ac y $& ac (abc)\1 abcabc y $1 abc ([a-c]*)\1 abcabc y $1 abc \1 - c - Reference to nonexistent group \2 - c - Reference to nonexistent group \g1 - c - Reference to nonexistent group \g-1 - c - Reference to nonexistent or unclosed group \g{1} - c - Reference to nonexistent group \g{-1} - c - Reference to nonexistent or unclosed group \g0 - c - Reference to invalid group 0 \g-0 - c - Reference to invalid group 0 \g{0} - c - Reference to invalid group 0 \g{-0} - c - Reference to invalid group 0 (a)|\1 a y - - (a)|\1 x n - - (a)|\2 - c - Reference to nonexistent group (([a-c])b*?\2)* ababbbcbc y $&-$1-$2 ababb-bb-b (([a-c])b*?\2){3} ababbbcbc y $&-$1-$2 ababbbcbc-cbc-c ((\3|b)\2(a)x)+ aaxabxbaxbbx n - - ((\3|b)\2(a)x)+ aaaxabaxbaaxbbax y $&-$1-$2-$3 bbax-bbax-b-a ((\3|b)\2(a)){2,} bbaababbabaaaaabbaaaabba y $&-$1-$2-$3 bbaaaabba-bba-b-a #Bug #3589 - up to perl-5.6.0 matches incorrectly, from 5.6.1 not anymore ^((.)?a\2)+$ babadad n - - (a)|(b) b y $-[0] 0 (a)|(b) b y $+[0] 1 (a)|(b) b y x$-[1] x (a)|(b) b y x$+[1] x (a)|(b) b y $-[2] 0 (a)|(b) b y $+[2] 1 'abc'i ABC y $& ABC 'abc'i XBC n - - 'abc'i AXC n - - 'abc'i ABX n - - 'abc'i XABCY y $& ABC 'abc'i ABABC y $& ABC 'ab*c'i ABC y $& ABC 'ab*bc'i ABC y $& ABC 'ab*bc'i ABBC y $& ABBC 'ab*?bc'i ABBBBC y $& ABBBBC 'ab{0,}?bc'i ABBBBC y $& ABBBBC 'ab+?bc'i ABBC y $& ABBC 'ab+bc'i ABC n - - 'ab+bc'i ABQ n - - 'ab{1,}bc'i ABQ n - - 'ab+bc'i ABBBBC y $& ABBBBC 'ab{1,}?bc'i ABBBBC y $& ABBBBC 'ab{1,3}?bc'i ABBBBC y $& ABBBBC 'ab{3,4}?bc'i ABBBBC y $& ABBBBC 'ab{4,5}?bc'i ABBBBC n - - 'ab??bc'i ABBC y $& ABBC 'ab??bc'i ABC y $& ABC 'ab{0,1}?bc'i ABC y $& ABC 'ab??bc'i ABBBBC n - - 'ab??c'i ABC y $& ABC 'ab{0,1}?c'i ABC y $& ABC '^abc$'i ABC y $& ABC '^abc$'i ABCC n - - '^abc'i ABCC y $& ABC '^abc$'i AABC n - - 'abc$'i AABC y $& ABC '^'i ABC y $& '$'i ABC y $& 'a.c'i ABC y $& ABC 'a.c'i AXC y $& AXC 'a.*?c'i AXYZC y $& AXYZC 'a.*c'i AXYZD n - - 'a[bc]d'i ABC n - - 'a[bc]d'i ABD y $& ABD 'a[b-d]e'i ABD n - - 'a[b-d]e'i ACE y $& ACE 'a[b-d]'i AAC y $& AC 'a[-b]'i A- y $& A- 'a[b-]'i A- y $& A- 'a[b-a]'i - c - Invalid [] range \"b-a\" 'a[]b'i - c - Unmatched [ 'a['i - c - Unmatched [ 'a]'i A] y $& A] 'a[]]b'i A]B y $& A]B 'a[^bc]d'i AED y $& AED 'a[^bc]d'i ABD n - - 'a[^-b]c'i ADC y $& ADC 'a[^-b]c'i A-C n - - 'a[^]b]c'i A]C n - - 'a[^]b]c'i ADC y $& ADC 'ab|cd'i ABC y $& AB 'ab|cd'i ABCD y $& AB '()ef'i DEF y $&-$1 EF- '*a'i - c - Quantifier follows nothing '(|*)b'i - c - Quantifier follows nothing '(*)b'i - c - Unknown verb '$b'i B n - - 'a\'i - c - Search pattern not terminated 'a\(b'i A(B y $&-$1 A(B- 'a\(*b'i AB y $& AB 'a\(*b'i A((B y $& A((B 'a\\b'i A\\B y $& A\\B 'abc)'i - c - Unmatched ) '(abc'i - c - Unmatched ( '((a))'i ABC y $&-$1-$2 A-A-A '(a)b(c)'i ABC y $&-$1-$2 ABC-A-C 'a+b+c'i AABBABC y $& ABC 'a{1,}b{1,}c'i AABBABC y $& ABC 'a**'i - c - Nested quantifiers 'a.+?c'i ABCABC y $& ABC 'a.*?c'i ABCABC y $& ABC 'a.{0,5}?c'i ABCABC y $& ABC '(a+|b)*'i AB y $&-$1 AB-B '(a+|b){0,}'i AB y $&-$1 AB-B '(a+|b)+'i AB y $&-$1 AB-B '(a+|b){1,}'i AB y $&-$1 AB-B '(a+|b)?'i AB y $&-$1 A-A '(a+|b){0,1}'i AB y $&-$1 A-A '(a+|b){0,1}?'i AB y $&-$1 - ')('i - c - Unmatched ) '[^ab]*'i CDE y $& CDE 'abc'i n - - 'a*'i y $& '([abc])*d'i ABBBCD y $&-$1 ABBBCD-C '([abc])*bcd'i ABCD y $&-$1 ABCD-A 'a|b|c|d|e'i E y $& E '(a|b|c|d|e)f'i EF y $&-$1 EF-E 'abcd*efg'i ABCDEFG y $& ABCDEFG 'ab*'i XABYABBBZ y $& AB 'ab*'i XAYABBBZ y $& A '(ab|cd)e'i ABCDE y $&-$1 CDE-CD '[abhgefdc]ij'i HIJ y $& HIJ '^(ab|cd)e'i ABCDE n x$1y XY '(abc|)ef'i ABCDEF y $&-$1 EF- '(a|b)c*d'i ABCD y $&-$1 BCD-B '(ab|ab*)bc'i ABC y $&-$1 ABC-A 'a([bc]*)c*'i ABC y $&-$1 ABC-BC 'a([bc]*)(c*d)'i ABCD y $&-$1-$2 ABCD-BC-D 'a([bc]+)(c*d)'i ABCD y $&-$1-$2 ABCD-BC-D 'a([bc]*)(c+d)'i ABCD y $&-$1-$2 ABCD-B-CD 'a[bcd]*dcdcde'i ADCDCDE y $& ADCDCDE 'a[bcd]+dcdcde'i ADCDCDE n - - '(ab|a)b*c'i ABC y $&-$1 ABC-AB '((a)(b)c)(d)'i ABCD y $1-$2-$3-$4 ABC-A-B-D '[a-zA-Z_][a-zA-Z0-9_]*'i ALPHA y $& ALPHA '^a(bc+|b[eh])g|.h$'i ABH y $&-$1 BH- '(bc+d$|ef*g.|h?i(j|k))'i EFFGZ y $&-$1-$2 EFFGZ-EFFGZ- '(bc+d$|ef*g.|h?i(j|k))'i IJ y $&-$1-$2 IJ-IJ-J '(bc+d$|ef*g.|h?i(j|k))'i EFFG n - - '(bc+d$|ef*g.|h?i(j|k))'i BCDD n - - '(bc+d$|ef*g.|h?i(j|k))'i REFFGZ y $&-$1-$2 EFFGZ-EFFGZ- '((((((((((a))))))))))'i A y $10 A '((((((((((a))))))))))\10'i AA y $& AA '((((((((((a))))))))))${bang}'i AA n - - '((((((((((a))))))))))${bang}'i A! y $& A! '(((((((((a)))))))))'i A y $& A '(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))'i A y $1 A '(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))'i C y $1 C 'multiple words of text'i UH-UH n - - 'multiple words'i MULTIPLE WORDS, YEAH y $& MULTIPLE WORDS '(.*)c(.*)'i ABCDE y $&-$1-$2 ABCDE-AB-DE '\((.*), (.*)\)'i (A, B) y ($2, $1) (B, A) '[k]'i AB n - - 'abcd'i ABCD y $&-\$&-\\$& ABCD-\$&-\\ABCD 'a(bc)d'i ABCD y $1-\$1-\\$1 BC-\$1-\\BC 'a[-]?c'i AC y $& AC '(abc)\1'i ABCABC y $1 ABC '([a-c]*)\1'i ABCABC y $1 ABC a(?!b). abad y $& ad a(?=d). abad y $& ad a(?=c|d). abad y $& ad a(?:b|c|d)(.) ace y $1 e a(?:b|c|d)*(.) ace y $1 e a(?:b|c|d)+?(.) ace y $1 e a(?:b|c|d)+?(.) acdbcdbe y $1 d a(?:b|c|d)+(.) acdbcdbe y $1 e a(?:b|c|d){2}(.) acdbcdbe y $1 b a(?:b|c|d){4,5}(.) acdbcdbe y $1 b a(?:b|c|d){4,5}?(.) acdbcdbe y $1 d ((foo)|(bar))* foobar y $1-$2-$3 bar-foo-bar :(?: - c - Sequence (? incomplete a(?:b|c|d){6,7}(.) acdbcdbe y $1 e a(?:b|c|d){6,7}?(.) acdbcdbe y $1 e a(?:b|c|d){5,6}(.) acdbcdbe y $1 e a(?:b|c|d){5,6}?(.) acdbcdbe y $1 b a(?:b|c|d){5,7}(.) acdbcdbe y $1 e a(?:b|c|d){5,7}?(.) acdbcdbe y $1 b a(?:b|(c|e){1,2}?|d)+?(.) ace y $1$2 ce ^(.+)?B AB y $1 A ^([^a-z])|(\^)$ . y $1 . ^[<>]& <&OUT y $& <& ^(a\1?){4}$ aaaaaaaaaa y $1 aaaa ^(a\1?){4}$ aaaaaaaaa n - - ^(a\1?){4}$ aaaaaaaaaaa n - - ^(a(?(1)\1)){4}$ aaaaaaaaaa y $1 aaaa ^(a(?(1)\1)){4}$ aaaaaaaaa n - - ^(a(?(1)\1)){4}$ aaaaaaaaaaa n - - ((a{4})+) aaaaaaaaa y $1 aaaaaaaa (((aa){2})+) aaaaaaaaaa y $1 aaaaaaaa (((a{2}){2})+) aaaaaaaaaa y $1 aaaaaaaa (?:(f)(o)(o)|(b)(a)(r))* foobar y $1:$2:$3:$4:$5:$6 f:o:o:b:a:r (?<=a)b ab y $& b (?<=a)b cb n - - (?<=a)b b n - - (?a+)ab aaab n - - (?>a+)b aaab y - - ([[:]+) a:[b]: y $1 :[ ([[=]+) a=[b]= y $1 =[ ([[.]+) a.[b]. y $1 .[ [a[:xyz: - c - Unmatched [ [a[:xyz:] - c - POSIX class [:xyz:] unknown [a[:]b[:c] abc y $& abc ([a[:xyz:]b]+) pbaq c - POSIX class [:xyz:] unknown [a[:]b[:c] abc y $& abc ([[:alpha:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd ([[:alnum:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy ([[:ascii:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__-- ${nulnul} ([[:cntrl:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ${nulnul} ([[:digit:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 01 ([[:graph:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__-- ([[:lower:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 cd ([[:print:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__-- ([[:punct:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 __-- ([[:space:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ([[:word:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__ ([[:upper:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 AB ([[:xdigit:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01 ([[:^alpha:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 01 ([[:^alnum:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 __-- ${nulnul}${ffff} ([[:^ascii:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ${ffff} ([[:^cntrl:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__-- ([[:^digit:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd ([[:^lower:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 AB ([[:^print:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ${nulnul}${ffff} ([[:^punct:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy ([[:^space:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 ABcd01Xy__-- ([[:^word:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 -- ${nulnul}${ffff} ([[:^upper:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 cd01 ([[:^xdigit:]]+) ABcd01Xy__-- ${nulnul}${ffff} y $1 Xy__-- ${nulnul}${ffff} [[:foo:]] - c - POSIX class [:foo:] unknown [[:^foo:]] - c - POSIX class [:^foo:] unknown ((?>a+)b) aaab y $1 aaab (?>(a+))b aaab y $1 aaa ((?>[^()]+)|\([^()]*\))+ ((abc(ade)ufh()()x y $& abc(ade)ufh()()x (?<=x+)y - c - Variable length lookbehind not implemented a{37,17} - c - Can't do {n,m} with n > m \Z a\nb\n y $-[0] 3 \z a\nb\n y $-[0] 4 $ a\nb\n y $-[0] 3 \Z b\na\n y $-[0] 3 \z b\na\n y $-[0] 4 $ b\na\n y $-[0] 3 \Z b\na y $-[0] 3 \z b\na y $-[0] 3 $ b\na y $-[0] 3 '\Z'm a\nb\n y $-[0] 3 '\z'm a\nb\n y $-[0] 4 '$'m a\nb\n y $-[0] 1 '\Z'm b\na\n y $-[0] 3 '\z'm b\na\n y $-[0] 4 '$'m b\na\n y $-[0] 1 '\Z'm b\na y $-[0] 3 '\z'm b\na y $-[0] 3 '$'m b\na y $-[0] 1 a\Z a\nb\n n - - a\z a\nb\n n - - a$ a\nb\n n - - a\Z b\na\n y $-[0] 2 a\z b\na\n n - - a$ b\na\n y $-[0] 2 a\Z b\na y $-[0] 2 a\z b\na y $-[0] 2 a$ b\na y $-[0] 2 'a\Z'm a\nb\n n - - 'a\z'm a\nb\n n - - 'a$'m a\nb\n y $-[0] 0 'a\Z'm b\na\n y $-[0] 2 'a\z'm b\na\n n - - 'a$'m b\na\n y $-[0] 2 'a\Z'm b\na y $-[0] 2 'a\z'm b\na y $-[0] 2 'a$'m b\na y $-[0] 2 aa\Z aa\nb\n n - 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- abb\Z b\nca\n n - - abb\z b\nca\n n - - abb$ b\nca\n n - - abb\Z b\nca n - - abb\z b\nca n - - abb$ b\nca n - - 'abb\Z'm ca\nb\n n - - 'abb\z'm ca\nb\n n - - 'abb$'m ca\nb\n n - - 'abb\Z'm b\nca\n n - - 'abb\z'm b\nca\n n - - 'abb$'m b\nca\n n - - 'abb\Z'm b\nca n - - 'abb\z'm b\nca n - - 'abb$'m b\nca n - - (^|x)(c) ca y $2 c a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz x n - - a(?{$a=2;$b=3;($b)=$a})b yabz y $b 2 round\(((?>[^()]+))\) _I(round(xs * sz),1) y $1 xs * sz '((?x:.) )' x y $1- x - '((?-x:.) )'x x y $1- x- foo.bart foo.bart y - - '^d[x][x][x]'m abcd\ndxxx y - - .X(.+)+X bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .X(.+)+XX bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .XX(.+)+X bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .X(.+)+X bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .X(.+)+XX bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .XX(.+)+X bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .X(.+)+[X] bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .X(.+)+[X][X] bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .XX(.+)+[X] bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .X(.+)+[X] bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .X(.+)+[X][X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .XX(.+)+[X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .[X](.+)+[X] bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .[X](.+)+[X][X] bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .[X][X](.+)+[X] bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y - - .[X](.+)+[X] bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .[X](.+)+[X][X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - .[X][X](.+)+[X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa n - - tt+$ xxxtt y - - ([a-\d]+) za-9z y $1 a-9 ([\d-z]+) a0-za y $1 0-z ([\d-\s]+) a0- z y $1 0- ([a-[:digit:]]+) za-9z y $1 a-9 ([[:digit:]-z]+) =0-z= y $1 0-z ([[:digit:]-[:alpha:]]+) =0-z= y $1 0-z \GX.*X aaaXbX n - - (\d+\.\d+) 3.1415926 y $1 3.1415926 (\ba.{0,10}br) have a web browser y $1 a web br '\.c(pp|xx|c)?$'i Changes n - - '\.c(pp|xx|c)?$'i IO.c y - - '(\.c(pp|xx|c)?$)'i IO.c y $1 .c ^([a-z]:) C:/ n - - '^\S\s+aa$'m \nx aa y - - (^|a)b ab y - - ^([ab]*?)(b)?(c)$ abac y -$2- -- (\w)?(abc)\1b abcab n - - ^(?:.,){2}c a,b,c y - - ^(.,){2}c a,b,c y $1 b, ^(?:[^,]*,){2}c a,b,c y - - ^([^,]*,){2}c a,b,c y $1 b, ^([^,]*,){3}d aaa,b,c,d y $1 c, ^([^,]*,){3,}d aaa,b,c,d y $1 c, ^([^,]*,){0,3}d aaa,b,c,d y $1 c, ^([^,]{1,3},){3}d aaa,b,c,d y $1 c, ^([^,]{1,3},){3,}d aaa,b,c,d y $1 c, ^([^,]{1,3},){0,3}d aaa,b,c,d y $1 c, ^([^,]{1,},){3}d aaa,b,c,d y $1 c, ^([^,]{1,},){3,}d aaa,b,c,d y $1 c, ^([^,]{1,},){0,3}d aaa,b,c,d y $1 c, ^([^,]{0,3},){3}d aaa,b,c,d y $1 c, ^([^,]{0,3},){3,}d aaa,b,c,d y $1 c, ^([^,]{0,3},){0,3}d aaa,b,c,d y $1 c, (?i) y - - '(?!\A)x'm a\nxb\n y - - ^(a(b)?)+$ aba y -$1-$2- -a-- ^(aa(bb)?)+$ aabbaa y -$1-$2- -aa-- '^.{9}abc.*\n'm 123\nabcabcabcabc\n y - - ^(a)?a$ a y -$1- -- ^(a)?(?(1)a|b)+$ a n - - ^(a\1?)(a\1?)(a\2?)(a\3?)$ aaaaaa y $1,$2,$3,$4 a,aa,a,aa ^(a\1?){4}$ aaaaaa y $1 aa ^(0+)?(?:x(1))? x1 y - - ^([0-9a-fA-F]+)(?:x([0-9a-fA-F]+)?)(?:x([0-9a-fA-F]+))? 012cxx0190 y - - ^(b+?|a){1,2}c bbbac y $1 a ^(b+?|a){1,2}c bbbbac y $1 a \((\w\. \w+)\) cd. (A. Tw) y -$1- -A. Tw- ((?:aaaa|bbbb)cccc)? aaaacccc y - - ((?:aaaa|bbbb)cccc)? bbbbcccc y - - (a)?(a)+ a y $1:$2 :a - (ab)?(ab)+ ab y $1:$2 :ab - (abc)?(abc)+ abc y $1:$2 :abc - 'b\s^'m a\nb\n n - - \ba a y - - ^(a(??{"(?!)"})|(a)(?{1}))b ab y $2 a # [ID 20010811.006] ab(?i)cd AbCd n - - # [ID 20010809.023] ab(?i)cd abCd y - - (A|B)*(?(1)(CD)|(CD)) CD y $2-$3 -CD (A|B)*(?(1)(CD)|(CD)) ABCD y $2-$3 CD- (A|B)*?(?(1)(CD)|(CD)) CD y $2-$3 -CD # [ID 20010803.016] (A|B)*?(?(1)(CD)|(CD)) ABCD y $2-$3 CD- '^(o)(?!.*\1)'i Oo n - - (.*)\d+\1 abc12bc y $1 bc (?m:(foo\s*$)) foo\n bar y $1 foo (.*)c abcd y $1 ab (.*)(?=c) abcd y $1 ab (.*)(?=c)c abcd yB $1 ab (.*)(?=b|c) abcd y $1 ab (.*)(?=b|c)c abcd y $1 ab (.*)(?=c|b) abcd y $1 ab (.*)(?=c|b)c abcd y $1 ab (.*)(?=[bc]) abcd y $1 ab (.*)(?=[bc])c abcd yB $1 ab (.*)(?<=b) abcd y $1 ab (.*)(?<=b)c abcd y $1 ab (.*)(?<=b|c) abcd y $1 abc (.*)(?<=b|c)c abcd y $1 ab (.*)(?<=c|b) abcd y $1 abc (.*)(?<=c|b)c abcd y $1 ab (.*)(?<=[bc]) abcd y $1 abc (.*)(?<=[bc])c abcd y $1 ab (.*?)c abcd y $1 ab (.*?)(?=c) abcd y $1 ab (.*?)(?=c)c abcd yB $1 ab (.*?)(?=b|c) abcd y $1 a (.*?)(?=b|c)c abcd y $1 ab (.*?)(?=c|b) abcd y $1 a (.*?)(?=c|b)c abcd y $1 ab (.*?)(?=[bc]) abcd y $1 a (.*?)(?=[bc])c abcd yB $1 ab (.*?)(?<=b) abcd y $1 ab (.*?)(?<=b)c abcd y $1 ab (.*?)(?<=b|c) abcd y $1 ab (.*?)(?<=b|c)c abcd y $1 ab (.*?)(?<=c|b) abcd y $1 ab (.*?)(?<=c|b)c abcd y $1 ab (.*?)(?<=[bc]) abcd y $1 ab (.*?)(?<=[bc])c abcd y $1 ab 2(]*)?$\1 2 y $& 2 (??{}) x y - - a(b)?? abc y <$1> <> # undef [perl #16773] (\d{1,3}\.){3,} 128.134.142.8 y <$1> <142.> # [perl #18019] ^.{3,4}(.+)\1\z foobarbar y $1 bar # 16 tests for [perl #23171] ^(?:f|o|b){3,4}(.+)\1\z foobarbar y $1 bar ^.{3,4}((?:b|a|r)+)\1\z foobarbar y $1 bar ^(?:f|o|b){3,4}((?:b|a|r)+)\1\z foobarbar y $1 bar ^.{3,4}(.+?)\1\z foobarbar y $1 bar ^(?:f|o|b){3,4}(.+?)\1\z foobarbar y $1 bar ^.{3,4}((?:b|a|r)+?)\1\z foobarbar y $1 bar ^(?:f|o|b){3,4}((?:b|a|r)+?)\1\z foobarbar y $1 bar ^.{2,3}?(.+)\1\z foobarbar y $1 bar ^(?:f|o|b){2,3}?(.+)\1\z foobarbar y $1 bar ^.{2,3}?((?:b|a|r)+)\1\z foobarbar y $1 bar ^(?:f|o|b){2,3}?((?:b|a|r)+)\1\z foobarbar y $1 bar ^.{2,3}?(.+?)\1\z foobarbar y $1 bar ^(?:f|o|b){2,3}?(.+?)\1\z foobarbar y $1 bar ^.{2,3}?((?:b|a|r)+?)\1\z foobarbar y $1 bar ^(?:f|o|b){2,3}?((?:b|a|r)+?)\1\z foobarbar y $1 bar .*a(?!(b|cd)*e).*f ......abef n - - # [perl #23030] x(?# x c - Sequence (?#... not terminated :x(?#: x c - Sequence (?#... not terminated (WORDS|WORD)S WORDS y $1 WORD (X.|WORDS|X.|WORD)S WORDS y $1 WORD (WORDS|WORLD|WORD)S WORDS y $1 WORD (X.|WORDS|WORD|Y.)S WORDS y $1 WORD (foo|fool|x.|money|parted)$ fool y $1 fool (x.|foo|fool|x.|money|parted|y.)$ fool y $1 fool (foo|fool|money|parted)$ fool y $1 fool (foo|fool|x.|money|parted)$ fools n - - (x.|foo|fool|x.|money|parted|y.)$ fools n - - (foo|fool|money|parted)$ fools n - - (a|aa|aaa||aaaa|aaaaa|aaaaaa)(b|c) aaaaaaaaaaaaaaab y $1$2 aaaaaab (a|aa|aaa||aaaa|aaaaa|aaaaaa)(??{$1&&""})(b|c) aaaaaaaaaaaaaaab y $1$2 aaaaaab (a|aa|aaa|aaaa|aaaaa|aaaaaa)(??{$1&&"foo"})(b|c) aaaaaaaaaaaaaaab n - - ^(a*?)(?!(aa|aaaa)*$) aaaaaaaaaaaaaaaaaaaa y $1 a # [perl #34195] ^(a*?)(?!(aa|aaaa)*$)(?=a\z) aaaaaaaa y $1 aaaaaaa ^(.)\s+.$(?(1)) A B y $1 A # [perl #37688] (?:r?)*?r|(.{2,4}) abcde y $1 abcd (?!)+?|(.{2,4}) abcde y $1 abcd ^(a*?)(?!(a{6}|a{5})*$) aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa y $+[1] 12 # super-linear cache bug may return 18 ^((?>(?:aa)?b)?) aab y $1 aab ^((?:aa)*)(?:X+((?:\d+|-)(?:X+(.+))?))?$ aaaaX5 y $1 aaaa X(A|B||C|D)Y XXXYYY y $& XY # Trie w/ NOTHING (?i:X([A]|[B]|y[Y]y|[D]|)Y) XXXYYYB y $& XY # Trie w/ NOTHING ^([a]{1})*$ aa y $1 a a(?!b(?!c))(..) abababc y $1 bc # test nested negatives a(?!b(?=a))(..) abababc y $1 bc # test nested lookaheads a(?!b(?!c(?!d(?!e))))...(.) abxabcdxabcde y $1 e X(?!b+(?!(c+)*(?!(c+)*d))).*X aXbbbbbbbcccccccccccccaaaX y - - ^(XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^(XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P): ZEQQQX: y $1 ZEQQQX ^([TUV]+|XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^([TUV]+|XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P): ZEQQQX: y $1 ZEQQQX ^([TUV]+|XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P|[MKJ]): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^([TUV]+|XXXXXXXXXX|YYYYYYYYYY|Z.Q*X|Z[TE]Q*P|[MKJ]): ZEQQQX: y $1 ZEQQQX ^(XXX|YYY|Z.Q*X|Z[TE]Q*P): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^(XXX|YYY|Z.Q*X|Z[TE]Q*P): ZEQQQX: y $1 ZEQQQX ^([TUV]+|XXX|YYY|Z.Q*X|Z[TE]Q*P): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^([TUV]+|XXX|YYY|Z.Q*X|Z[TE]Q*P): ZEQQQX: y $1 ZEQQQX ^([TUV]+|XXX|YYY|Z.Q*X|Z[TE]Q*P|[MKJ]): ZEQQQQQQQQQQQQQQQQQQP: y $1 ZEQQQQQQQQQQQQQQQQQQP ^([TUV]+|XXX|YYY|Z.Q*X|Z[TE]Q*P|[MKJ]): ZEQQQX: y $1 ZEQQQX X(?:ABCF[cC]x*|ABCD|ABCF):(?:DIT|DID|DIM) XABCFCxxxxxxxxxx:DIM y $& XABCFCxxxxxxxxxx:DIM (((ABCD|ABCE|ABCF)))(A|B|C[xy]*): ABCFCxxxxxxxxxx:DIM y $& ABCFCxxxxxxxxxx: (?=foo) foo y pos 0 (?=foo) XfooY y pos 1 .*(?=foo) XfooY y pos 1 (?<=foo) foo y pos 3 (?<=foo) XfooY y pos 4 .*(?<=foo) foo y pos 3 .*(?<=foo) XfooY y pos 4 (?<=foo)Y XfooY y pos 5 o(?<=foo)Y ..XfooY.. y pos 7 X(?=foo)f ..XfooY.. y pos 4 X(?=foo) ..XfooY.. y pos 3 X(?<=foo.)[YZ] ..XfooXY.. y pos 8 (?=XY*foo) Xfoo y pos 0 ^(?=XY*foo) Xfoo y pos 0 ^(??{"a+"})a aa y $& aa ^(?:(??{"a+"})|b)a aa y $& aa ^(??{chr 0x100}).$ \x{100}\x{100} y $& \x{100}\x{100} ^(??{q(\x{100})}). \x{100}\x{100} y $& \x{100}\x{100} ^(??{q(.+)})\x{100} \x{100}\x{100} y $& \x{100}\x{100} ^(??{q(.)})\x{100} \x{100}\x{100} y $& \x{100}\x{100} ^(??{chr 0x100})\xbb \x{100}\x{bb} y $& \x{100}\x{bb} ^(.)(??{"(.)(.)"})(.)$ abcd y $1-$2 a-d ^(.)(??{"(bz+|.)(.)"})(.)$ abcd y $1-$2 a-d ^(.)((??{"(.)(cz+)"})|.) abcd y $1-$2 a-b ^a(?>(??{q(b)}))(??{q(c)})d abcd y - - ^x(??{""})+$ x y $& x ^(<(?:[^<>]+|(?3)|(?1))*>)()(!>!>!>)$ <!>!>><>>!>!>!> y $1 <!>!>><>> ^(<(?:[^<>]+|(?1))*>)$ <<><<<><>>>> y $1 <<><<<><>>>> ((?2)*)([fF]o+) fooFoFoo y $1-$2 fooFo-Foo (<(?:[^<>]+|(?R))*>) <<><<<><>>>> y $1 <<><<<><>>>> (?foo|bar|baz) snofooewa y $1 foo (?foo|bar|baz) snofooewa y $+{n} foo (?foo|bar|baz)(?[ew]+) snofooewa y $+{n} foo (?foo|bar|baz)(?[ew]+) snofooewa y $+{m} ew (?foo)|(?bar)|(?baz) snofooewa y $+{n} foo (?foo)(??{ $+{n} }) snofooefoofoowaa y $+{n} foo (?Pfoo|bar|baz) snofooewa y $1 foo (?Pfoo|bar|baz) snofooewa y $+{n} foo (?Pfoo|bar|baz)(?P[ew]+) snofooewa y $+{n} foo (?Pfoo|bar|baz)(?P[ew]+) snofooewa y $+{m} ew (?Pfoo)|(?Pbar)|(?Pbaz) snofooewa y $+{n} foo (?Pfoo)(??{ $+{n} }) snofooefoofoowaa y $+{n} foo (?P<=n>foo|bar|baz) snofooewa c - Sequence (?P<=...) not recognized (?Pfoo|bar|baz) snofooewa c - Sequence (?Pfoo|bar|baz) snofooewa c - Sequence (?PX<...) not recognized /(?'n'foo|bar|baz)/ snofooewa y $1 foo /(?'n'foo|bar|baz)/ snofooewa y $+{n} foo /(?'n'foo|bar|baz)(?'m'[ew]+)/ snofooewa y $+{n} foo /(?'n'foo|bar|baz)(?'m'[ew]+)/ snofooewa y $+{m} ew /(?'n'foo)|(?'n'bar)|(?baz)/ snobazewa y $+{n} baz /(?'n'foo)(??{ $+{n} })/ snofooefoofoowaa y $+{n} foo /(?'n'foo)\k/ ..foofoo.. y $1 foo /(?'n'foo)\k/ ..foofoo.. y $+{n} foo /(?foo)\k'n'/ ..foofoo.. y $1 foo /(?foo)\k'n'/ ..foofoo.. y $+{n} foo /(?:(?foo)|(?bar))\k/ ..barbar.. y $+{n} bar /^(?'main'<(?:[^<>]+|(?&crap)|(?&main))*>)(?'empty')(?'crap'!>!>!>)$/ <!>!>><>>!>!>!> y $+{main} <!>!>><>> /^(?'main'<(?:[^<>]+|(?&main))*>)$/ <<><<<><>>>> y $1 <<><<<><>>>> /(?'first'(?&second)*)(?'second'[fF]o+)/ fooFoFoo y $+{first}-$+{second} fooFo-Foo (?foo)?(?()bar|nada) foobar y $+{A} foo (?foo)?(?()bar|nada) foo-barnada y $& nada (?foo)?(?(1)bar|nada) foo-barnada y $& nada (?foo(?(R)bar))?(?1) foofoobar y $1 foo (?foo(?(R)bar))?(?1) foofoobar y $& foofoobar (x)(?foo(?(R&A)bar))?(?&A) xfoofoobar y $2 foo (x)(?foo(?(R&A)bar))?(?&A) xfoofoobar y $& xfoofoobar (x)(?foo(?(R2)bar))?(?&A) xfoofoobar y $2 foo (x)(?foo(?(R2)bar))?(?&A) xfoofoobar y $& xfoofoobar (?1)(?(DEFINE)(blah)) blah y $& blah /^(?(?.)((?&PAL)|.?)\k)$/ madamimadam y $& madamimadam /^(?(?.)((?&PAL)|.?)\k)$/ madamiamadam n - - /(a)?((?1))(fox)/ aafox y $1-$2-$3 a-a-fox /(a)*((?1))(fox)/ aafox y $1-$2-$3 a-a-fox /(a)+((?1))(fox)/ aafox y $1-$2-$3 a-a-fox /(a){1,100}((?1))(fox)/ aafox y $1-$2-$3 a-a-fox /(a){0,100}((?1))(fox)/ aafox y $1-$2-$3 a-a-fox /(ab)?((?1))(fox)/ ababfox y $1-$2-$3 ab-ab-fox /(ab)*((?1))(fox)/ ababfox y $1-$2-$3 ab-ab-fox /(ab)+((?1))(fox)/ ababfox y $1-$2-$3 ab-ab-fox /(ab){1,100}((?1))(fox)/ ababfox y $1-$2-$3 ab-ab-fox /(ab){0,100}((?1))(fox)/ ababfox y $1-$2-$3 ab-ab-fox # possessive captures a++a aaaaa n - - a*+a aaaaa n - - a{1,5}+a aaaaa n - - a?+a ab n - - a++b aaaaab y $& aaaaab a*+b aaaaab y $& aaaaab a{1,5}+b aaaaab y $& aaaaab a?+b ab y $& ab fooa++a fooaaaaa n - - fooa*+a fooaaaaa n - - fooa{1,5}+a fooaaaaa n - - fooa?+a fooab n - - fooa++b fooaaaaab y $& fooaaaaab fooa*+b fooaaaaab y $& fooaaaaab fooa{1,5}+b fooaaaaab y $& fooaaaaab fooa?+b fooab y $& fooab (?:aA)++(?:aA) aAaAaAaAaA n - aAaAaAaAaA (aA)++(aA) aAaAaAaAaA n - aAaAaAaAaA (aA|bB)++(aA|bB) aAaAbBaAbB n - aAaAbBaAbB (?:aA|bB)++(?:aA|bB) aAbBbBbBaA n - aAbBbBbBaA (?:aA)*+(?:aA) aAaAaAaAaA n - aAaAaAaAaA (aA)*+(aA) aAaAaAaAaA n - aAaAaAaAaA (aA|bB)*+(aA|bB) aAaAbBaAaA n - aAaAbBaAaA (?:aA|bB)*+(?:aA|bB) aAaAaAbBaA n - aAaAaAbBaA (?:aA){1,5}+(?:aA) aAaAaAaAaA n - aAaAaAaAaA (aA){1,5}+(aA) aAaAaAaAaA n - aAaAaAaAaA (aA|bB){1,5}+(aA|bB) aAaAbBaAaA n - aAaAbBaAaA (?:aA|bB){1,5}+(?:aA|bB) bBbBbBbBbB n - bBbBbBbBbB (?:aA)?+(?:aA) aAb n - aAb (aA)?+(aA) aAb n - aAb (aA|bB)?+(aA|bB) bBb n - bBb (?:aA|bB)?+(?:aA|bB) aAb n - aAb (?:aA)++b aAaAaAaAaAb y $& aAaAaAaAaAb (aA)++b aAaAaAaAaAb y $& aAaAaAaAaAb (aA|bB)++b aAbBaAaAbBb y $& aAbBaAaAbBb (?:aA|bB)++b aAbBbBaAaAb y $& aAbBbBaAaAb (?:aA)*+b aAaAaAaAaAb y $& aAaAaAaAaAb (aA)*+b aAaAaAaAaAb y $& aAaAaAaAaAb (aA|bB)*+b bBbBbBbBbBb y $& bBbBbBbBbBb (?:aA|bB)*+b bBaAbBbBaAb y $& bBaAbBbBaAb (?:aA){1,5}+b aAaAaAaAaAb y $& aAaAaAaAaAb (aA){1,5}+b aAaAaAaAaAb y $& aAaAaAaAaAb (aA|bB){1,5}+b bBaAbBaAbBb y $& bBaAbBaAbBb (?:aA|bB){1,5}+b aAbBaAbBbBb y $& aAbBaAbBbBb (?:aA)?+b aAb y $& aAb (aA)?+b aAb y $& aAb (aA|bB)?+b bBb y $& bBb (?:aA|bB)?+b bBb y $& bBb foo(?:aA)++(?:aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA)++(aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA|bB)++(aA|bB) foobBbBbBaAaA n - foobBbBbBaAaA foo(?:aA|bB)++(?:aA|bB) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(?:aA)*+(?:aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA)*+(aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA|bB)*+(aA|bB) foobBaAbBaAaA n - foobBaAbBaAaA foo(?:aA|bB)*+(?:aA|bB) fooaAaAbBbBaA n - fooaAaAbBbBaA foo(?:aA){1,5}+(?:aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA){1,5}+(aA) fooaAaAaAaAaA n - fooaAaAaAaAaA foo(aA|bB){1,5}+(aA|bB) fooaAbBbBaAaA n - fooaAbBbBaAaA foo(?:aA|bB){1,5}+(?:aA|bB) fooaAbBbBaAbB n - fooaAbBbBaAbB foo(?:aA)?+(?:aA) fooaAb n - fooaAb foo(aA)?+(aA) fooaAb n - fooaAb foo(aA|bB)?+(aA|bB) foobBb n - foobBb foo(?:aA|bB)?+(?:aA|bB) fooaAb n - fooaAb foo(?:aA)++b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA)++b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA|bB)++b foobBaAbBaAbBb y $& foobBaAbBaAbBb foo(?:aA|bB)++b fooaAaAbBaAaAb y $& fooaAaAbBaAaAb foo(?:aA)*+b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA)*+b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA|bB)*+b foobBbBaAaAaAb y $& foobBbBaAaAaAb foo(?:aA|bB)*+b foobBaAaAbBaAb y $& foobBaAaAbBaAb foo(?:aA){1,5}+b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA){1,5}+b fooaAaAaAaAaAb y $& fooaAaAaAaAaAb foo(aA|bB){1,5}+b foobBaAaAaAaAb y $& foobBaAaAaAaAb foo(?:aA|bB){1,5}+b fooaAbBaAbBbBb y $& fooaAbBaAbBbBb foo(?:aA)?+b fooaAb y $& fooaAb foo(aA)?+b fooaAb y $& fooaAb foo(aA|bB)?+b foobBb y $& foobBb foo(?:aA|bB)?+b foobBb y $& foobBb ([^()]++|\([^()]*\))+ ((abc(ade)ufh()()x y $& abc(ade)ufh()()x round\(([^()]++)\) _I(round(xs * sz),1) y $1 xs * sz (foo[1x]|bar[2x]|baz[3x])+y foo1bar2baz3y y $1 baz3 (foo[1x]|bar[2x]|baz[3x])+y foo1bar2baz3y y $& foo1bar2baz3y (foo[1x]|bar[2x]|baz[3x])*y foo1bar2baz3y y $1 baz3 (foo[1x]|bar[2x]|baz[3x])*y foo1bar2baz3y y $& foo1bar2baz3y ([yX].|WORDS|[yX].|WORD)S WORDS y $1 WORD (WORDS|WORLD|WORD)S WORDS y $1 WORD ([yX].|WORDS|WORD|[xY].)S WORDS y $1 WORD (foo|fool|[zx].|money|parted)$ fool y $1 fool ([zx].|foo|fool|[zq].|money|parted|[yx].)$ fool y $1 fool (foo|fool|[zx].|money|parted)$ fools n - - ([zx].|foo|fool|[qx].|money|parted|[py].)$ fools n - - ([yX].|WORDS|[yX].|WORD)+S WORDS y $1 WORD (WORDS|WORLD|WORD)+S WORDS y $1 WORD ([yX].|WORDS|WORD|[xY].)+S WORDS y $1 WORD (foo|fool|[zx].|money|parted)+$ fool y $1 fool ([zx].|foo|fool|[zq].|money|parted|[yx].)+$ fool y $1 fool (foo|fool|[zx].|money|parted)+$ fools n - - ([zx].|foo|fool|[qx].|money|parted|[py].)+$ fools n - - (x|y|z[QW])+(longish|loquatious|excessive|overblown[QW])+ xyzQzWlongishoverblownW y $1-$2 zW-overblownW (x|y|z[QW])*(longish|loquatious|excessive|overblown[QW])* xyzQzWlongishoverblownW y $1-$2 zW-overblownW (x|y|z[QW]){1,5}(longish|loquatious|excessive|overblown[QW]){1,5} xyzQzWlongishoverblownW y $1-$2 zW-overblownW (x|y|z[QW])++(longish|loquatious|excessive|overblown[QW])++ xyzQzWlongishoverblownW y $1-$2 zW-overblownW (x|y|z[QW])*+(longish|loquatious|excessive|overblown[QW])*+ xyzQzWlongishoverblownW y $1-$2 zW-overblownW (x|y|z[QW]){1,5}+(longish|loquatious|excessive|overblown[QW]){1,5}+ xyzQzWlongishoverblownW y $1-$2 zW-overblownW a*(?!) aaaab n - - a*(*FAIL) aaaab n - - a*(*F) aaaab n - - (A(A|B(*ACCEPT)|C)D)(E) AB y $1 AB (A(A|B(*ACCEPT)|C)D)(E) ACDE y $1$2$3 ACDCE (a)(?:(?-1)|(?+1))(b) aab y $&-$1-$2 aab-a-b (a)(?:(?-1)|(?+1))(b) abb y $1-$2 a-b (a)(?:(?-1)|(?+1))(b) acb n - - (foo)(\g-2) foofoo y $1-$2 foo-foo (foo)(\g-2)(foo)(\g-2) foofoofoofoo y $1-$2-$3-$4 foo-foo-foo-foo (([abc]+) \g-1)(([abc]+) \g{-1}) abc abccba cba y $2-$4 abc-cba (a)(b)(c)\g1\g2\g3 abcabc y $1$2$3 abc # \k preceded by a literal /(?'n'foo) \k/ ..foo foo.. y $1 foo /(?'n'foo) \k/ ..foo foo.. y $+{n} foo /(?foo) \k'n'/ ..foo foo.. y $1 foo /(?foo) \k'n'/ ..foo foo.. y $+{n} foo /(?'a1'foo) \k'a1'/ ..foo foo.. y $+{a1} foo /(?foo) \k/ ..foo foo.. y $+{a1} foo /(?'_'foo) \k'_'/ ..foo foo.. y $+{_} foo /(?<_>foo) \k<_>/ ..foo foo.. y $+{_} foo /(?'_0_'foo) \k'_0_'/ ..foo foo.. y $+{_0_} foo /(?<_0_>foo) \k<_0_>/ ..foo foo.. y $+{_0_} foo /(?'0'foo) bar/ ..foo bar.. c - Sequence (?' /(?<0>foo) bar/ ..foo bar.. c - Sequence (?< /(?'12'foo) bar/ ..foo bar.. c - Sequence (?' /(?<12>foo) bar/ ..foo bar.. c - Sequence (?< /(?'1a'foo) bar/ ..foo bar.. c - Sequence (?' /(?<1a>foo) bar/ ..foo bar.. c - Sequence (?< /(?''foo) bar/ ..foo bar.. c - Sequence (?'' /(?<>foo) bar/ ..foo bar.. c - Sequence (?<> /foo \k'n'/ foo foo c - Reference to nonexistent named group /foo \k/ foo foo c - Reference to nonexistent named group /foo \k'a1'/ foo foo c - Reference to nonexistent named group /foo \k/ foo foo c - Reference to nonexistent named group /foo \k'_'/ foo foo c - Reference to nonexistent named group /foo \k<_>/ foo foo c - Reference to nonexistent named group /foo \k'_0_'/ foo foo c - Reference to nonexistent named group /foo \k<_0_>/ foo foo c - Reference to nonexistent named group /foo \k'0'/ foo foo c - Sequence \\k' /foo \k<0>/ foo foo c - Sequence \\k< /foo \k'12'/ foo foo c - Sequence \\k' /foo \k<12>/ foo foo c - Sequence \\k< /foo \k'1a'/ foo foo c - Sequence \\k' /foo \k<1a>/ foo foo c - Sequence \\k< /foo \k''/ foo foo c - Sequence \\k' /foo \k<>/ foo foo c - Sequence \\k< /(?as) (\w+) \k (\w+)/ as easy as pie y $1-$2-$3 as-easy-pie # \g{...} with a name as the argument /(?'n'foo) \g{n}/ ..foo foo.. y $1 foo /(?'n'foo) \g{n}/ ..foo foo.. y $+{n} foo /(?foo) \g{n}/ ..foo foo.. y $1 foo /(?foo) \g{n}/ ..foo foo.. y $+{n} foo /(?as) (\w+) \g{as} (\w+)/ as easy as pie y $1-$2-$3 as-easy-pie # Python style named capture buffer stuff /(?Pfoo)(?P=n)/ ..foofoo.. y $1 foo /(?Pfoo)(?P=n)/ ..foofoo.. y $+{n} foo /(?:(?Pfoo)|(?Pbar))(?P=n)/ ..barbar.. y $+{n} bar /^(?P(?P.)((?P>PAL)|.?)(?P=CHAR))$/ madamimadam y $& madamimadam /^(?P(?P.)((?P>PAL)|.?)(?P=CHAR))$/ madamiamadam n - - /(?Pfoo) (?P=n)/ ..foo foo.. y $1 foo /(?Pfoo) (?P=n)/ ..foo foo.. y $+{n} foo /(?Pas) (\w+) (?P=as) (\w+)/ as easy as pie y $1-$2-$3 as-easy-pie #check that non identifiers as names are treated as the appropriate lookaround (?<=bar>)foo bar>foo y $& foo (?)foo bar>foo n - - (?<=bar>ABC)foo bar>ABCfoo y $& foo (?ABC)foo bar>ABCfoo n - - (?)foo bar>ABCfoo y $& foo (?ABC)foo bar>ABCfoo y $& ABCfoo (?<=abcd(?<=(aaaabcd))) ..aaaabcd.. y $1 aaaabcd (?=xy(?<=(aaxy))) ..aaxy.. y $1 aaxy X(\w+)(?=\s)|X(\w+) Xab y [$1-$2] [-ab] #check that branch reset works ok. (?|a(.)b|d(.(o).)d|i(.)(.)j)(.) d!o!da y $1-$2-$3 !o!-o-a (?|a(.)b|d(.(o).)d|i(.)(.)j)(.) aabc y $1-$2-$3 a--c (?|a(.)b|d(.(o).)d|i(.)(.)j)(.) ixyjp y $1-$2-$3 x-y-p (?|(?|(a)|(b))|(?|(c)|(d))) a y $1 a (?|(?|(a)|(b))|(?|(c)|(d))) b y $1 b (?|(?|(a)|(b))|(?|(c)|(d))) c y $1 c (?|(?|(a)|(b))|(?|(c)|(d))) d y $1 d (.)(?|(.)(.)x|(.)d)(.) abcde y $1-$2-$3-$4-$5- b-c--e-- #Bug #41492 (?(DEFINE)(?(?&B)+)(?a))(?&A) a y $& a (?(DEFINE)(?(?&B)+)(?a))(?&A) aa y $& aa \x{100}?(??{""})xxx xxx y $& xxx foo(\R)bar foo\r\nbar y $1 \r\n foo(\R)bar foo\nbar y $1 \n foo(\R)bar foo\rbar y $1 \r foo(\R+)bar foo\r\n\x{85}\r\n\nbar y $1 \r\n\x{85}\r\n\n (\V+)(\R) foo\r\n\x{85}\r\n\nbar y $1-$2 foo-\r\n (\R+)(\V) foo\r\n\x{85}\r\n\nbar y $1-$2 \r\n\x{85}\r\n\n-b foo(\R)bar foo\x{85}bar y $1 \x{85} (\V)(\R) foo\x{85}bar y $1-$2 o-\x{85} (\R)(\V) foo\x{85}bar y $1-$2 \x{85}-b foo(\R)bar foo\r\nbar y $1 \r\n (\V)(\R) foo\r\nbar y $1-$2 o-\r\n (\R)(\V) foo\r\nbar y $1-$2 \r\n-b foo(\R)bar foo\r\nbar y $1 \r\n (\V)(\R) foo\r\nbar y $1-$2 o-\r\n (\R)(\V) foo\r\nbar y $1-$2 \r\n-b foo(\R)bar foo\rbar y $1 \r (\V)(\R) foo\rbar y $1-$2 o-\r (\R)(\V) foo\rbar y $1-$2 \r-b foo(\v+)bar foo\r\n\x{85}\r\n\nbar y $1 \r\n\x{85}\r\n\n (\V+)(\v) foo\r\n\x{85}\r\n\nbar y $1-$2 foo-\r (\v+)(\V) foo\r\n\x{85}\r\n\nbar y $1-$2 \r\n\x{85}\r\n\n-b foo(\v)bar foo\x{85}bar y $1 \x{85} (\V)(\v) foo\x{85}bar y $1-$2 o-\x{85} (\v)(\V) foo\x{85}bar y $1-$2 \x{85}-b foo(\v)bar foo\rbar y $1 \r (\V)(\v) foo\rbar y $1-$2 o-\r (\v)(\V) foo\rbar y $1-$2 \r-b foo(\h+)bar foo\t\x{A0}bar y $1 \t\x{A0} (\H+)(\h) foo\t\x{A0}bar y $1-$2 foo-\t (\h+)(\H) foo\t\x{A0}bar y $1-$2 \t\x{A0}-b foo(\h)bar foo\x{A0}bar y $1 \x{A0} (\H)(\h) foo\x{A0}bar y $1-$2 o-\x{A0} (\h)(\H) foo\x{A0}bar y $1-$2 \x{A0}-b foo(\h)bar foo\tbar y $1 \t (\H)(\h) foo\tbar y $1-$2 o-\t (\h)(\H) foo\tbar y $1-$2 \t-b .*\z foo\n y - - ^(?:(\d)x)?\d$ 1 y ${\(defined($1)?1:0)} 0 .*?(?:(\w)|(\w))x abx y $1-$2 b-