| 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]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 - ci - 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 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 by @- 0 0 0 |
| ((a)) abc by @+ 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 |
| (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 |
| (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 - ci - 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 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 - - |
| (?<!c)b ab y $& b |
| (?<!c)b cb n - - |
| (?<!c)b b y - - |
| (?<!c)b b y $& b |
| (?<%)b - c - Sequence (?<%...) not recognized |
| (?:..)*a aba y $& aba |
| (?:..)*?a aba y $& a |
| ^(?:b|a(?=(.)))*\1 abc y $& ab |
| ^(){3,5} abc y a$1 a |
| ^(a+)*ax aax y $1 a |
| ^((a|b)+)*ax aax y $1 a |
| ^((a|bc)+)*ax aax y $1 a |
| (a|x)*ab cab y y$1 y |
| (a)*ab cab y y$1 y |
| (?:(?i)a)b ab y $& ab |
| ((?i)a)b ab y $&:$1 ab:a |
| (?:(?i)a)b Ab y $& Ab |
| ((?i)a)b Ab y $&:$1 Ab:A |
| (?:(?i)a)b aB n - - |
| ((?i)a)b aB n - - |
| (?i:a)b ab y $& ab |
| ((?i:a))b ab y $&:$1 ab:a |
| (?i:a)b Ab y $& Ab |
| ((?i:a))b Ab y $&:$1 Ab:A |
| (?i:a)b aB n - - |
| ((?i:a))b aB n - - |
| '(?:(?-i)a)b'i ab y $& ab |
| '((?-i)a)b'i ab y $&:$1 ab:a |
| '(?:(?-i)a)b'i aB y $& aB |
| '((?-i)a)b'i aB y $&:$1 aB:a |
| '(?:(?-i)a)b'i Ab n - - |
| '((?-i)a)b'i Ab n - - |
| '(?:(?-i)a)b'i aB y $& aB |
| '((?-i)a)b'i aB y $1 a |
| '(?:(?-i)a)b'i AB n - - |
| '((?-i)a)b'i AB n - - |
| '(?-i:a)b'i ab y $& ab |
| '((?-i:a))b'i ab y $&:$1 ab:a |
| '(?-i:a)b'i aB y $& aB |
| '((?-i:a))b'i aB y $&:$1 aB:a |
| '(?-i:a)b'i Ab n - - |
| '((?-i:a))b'i Ab n - - |
| '(?-i:a)b'i aB y $& aB |
| '((?-i:a))b'i aB y $1 a |
| '(?-i:a)b'i AB n - - |
| '((?-i:a))b'i AB n - - |
| '((?-i:a.))b'i a\nB n - - |
| '((?s-i:a.))b'i a\nB y $1 a\n |
| '((?s-i:a.))b'i B\nB n - - |
| (?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b))) cabbbb y $& cabbbb |
| (?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb))) caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb y $& caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb |
| '(ab)\d\1'i Ab4ab y $1 Ab |
| '(ab)\d\1'i ab4Ab y $1 ab |
| foo\w*\d{4}baz foobar1234baz y $& foobar1234baz |
| a(?{})b cabd y $& ab |
| a(?{)b - c - Sequence (?{...}) not terminated or not {}-balanced |
| a(?{{})b - c - Sequence (?{...}) not terminated or not {}-balanced |
| a(?{}})b - c - |
| a(?{"{"})b - c - Sequence (?{...}) not terminated or not {}-balanced |
| a(?{"\{"})b cabd y $& ab |
| a(?{"{"}})b - c - Unmatched right curly bracket |
| a(?{$bl="\{"}).b caxbd y $bl { |
| x(~~)*(?:(?:F)?)? x~~ y - - |
| ^a(?#xxx){3}c aaac y $& aaac |
| '^a (?#xxx) (?#yyy) {3}c'x aaac y $& aaac |
| (?<![cd])b dbcb n - - |
| (?<![cd])[ab] dbaacb y $& a |
| (?<!(c|d))b dbcb n - - |
| (?<!(c|d))[ab] dbaacb y $& a |
| (?<!cd)[ab] cdaccb y $& b |
| ^(?:a?b?)*$ a-- n - - |
| ((?s)^a(.))((?m)^b$) a\nb\nc\n y $1;$2;$3 a\n;\n;b |
| ((?m)^b$) a\nb\nc\n y $1 b |
| (?m)^b a\nb\n y $& b |
| (?m)^(b) a\nb\n y $1 b |
| ((?m)^b) a\nb\n y $1 b |
| \n((?m)^b) a\nb\n y $1 b |
| ((?s).)c(?!.) a\nb\nc\n y $1 \n |
| ((?s).)c(?!.) a\nb\nc\n y $1:$& \n:\nc |
| ((?s)b.)c(?!.) a\nb\nc\n y $1 b\n |
| ((?s)b.)c(?!.) a\nb\nc\n y $1:$& b\n:b\nc |
| ^b a\nb\nc\n n - - |
| ()^b a\nb\nc\n n - - |
| ((?m)^b) a\nb\nc\n y $1 b |
| (?(1)a|b) a n - - |
| (?(1)b|a) a y $& a |
| (x)?(?(1)a|b) a n - - |
| (x)?(?(1)b|a) a y $& a |
| ()?(?(1)b|a) a y $& a |
| ()(?(1)b|a) a n - - |
| ()?(?(1)a|b) a y $& a |
| ^(\()?blah(?(1)(\)))$ (blah) y $2 ) |
| ^(\()?blah(?(1)(\)))$ blah y ($2) () |
| ^(\()?blah(?(1)(\)))$ blah) n - - |
| ^(\()?blah(?(1)(\)))$ (blah n - - |
| ^(\(+)?blah(?(1)(\)))$ (blah) y $2 ) |
| ^(\(+)?blah(?(1)(\)))$ blah y ($2) () |
| ^(\(+)?blah(?(1)(\)))$ blah) n - - |
| ^(\(+)?blah(?(1)(\)))$ (blah n - - |
| (?(1?)a|b) a c - Switch condition not recognized |
| (?(1)a|b|c) a c - Switch (?(condition)... contains too many branches |
| (?(?{0})a|b) a n - - |
| (?(?{0})b|a) a y $& a |
| (?(?{1})b|a) a n - - |
| (?(?{1})a|b) a y $& a |
| (?(?!a)a|b) a n - - |
| (?(?!a)b|a) a y $& a |
| (?(?=a)b|a) a n - - |
| (?(?=a)a|b) a y $& a |
| (?=(a+?))(\1ab) aaab y $2 aab |
| ^(?=(a+?))\1ab aaab n - - |
| (\w+:)+ one: y $1 one: |
| $(?<=^(a)) a y $1 a |
| (?=(a+?))(\1ab) aaab y $2 aab |
| ^(?=(a+?))\1ab aaab n - - |
| ([\w:]+::)?(\w+)$ abcd: n - - |
| ([\w:]+::)?(\w+)$ abcd y $1-$2 -abcd |
| ([\w:]+::)?(\w+)$ xy:z:::abcd y $1-$2 xy:z:::-abcd |
| ^[^bcd]*(c+) aexycd y $1 c |
| (a*)b+ caab y $1 aa |
| ([\w:]+::)?(\w+)$ abcd: n - - |
| ([\w:]+::)?(\w+)$ abcd y $1-$2 -abcd |
| ([\w:]+::)?(\w+)$ xy:z:::abcd y $1-$2 xy:z:::-abcd |
| ^[^bcd]*(c+) aexycd y $1 c |
| (?{$a=2})a*aa(?{local$a=$a+1})k*c(?{$b=$a}) yaaxxaaaacd y $b 3 |
| (?{$a=2})(a(?{local$a=$a+1}))*aak*c(?{$b=$a}) yaaxxaaaacd y $b 4 |
| (>a+)ab aaab n - - |
| (?>a+)b aaab y - - |
| ([[:]+) a:[b]: yi $1 :[ Java and ICU dont escape [[xyz |
| ([[=]+) a=[b]= yi $1 =[ Java and ICU dont escape [[xyz |
| ([[.]+) a.[b]. yi $1 .[ Java and ICU dont escape [[xyz |
| [a[:xyz: - c - Unmatched [ |
| [a[:xyz:] - c - POSIX class [:xyz:] unknown |
| [a[:]b[:c] abc yi $& abc Java and ICU embedded [ is nested set |
| ([a[:xyz:]b]+) pbaq c - POSIX class [:xyz:] unknown |
| [a[:]b[:c] abc iy $& abc Java and ICU embedded [ is nested set |
| ([[: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} yi $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} yi $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 $-[0] 2 |
| aa\Z aa\nb\n n - - |
| aa\z aa\nb\n n - - |
| aa$ aa\nb\n n - - |
| aa\Z b\naa\n y $-[0] 2 |
| aa\z b\naa\n n - - |
| aa$ b\naa\n y $-[0] 2 |
| aa\Z b\naa y $-[0] 2 |
| aa\z b\naa y $-[0] 2 |
| aa$ b\naa y $-[0] 2 |
| 'aa\Z'm aa\nb\n n - - |
| 'aa\z'm aa\nb\n n - - |
| 'aa$'m aa\nb\n y $-[0] 0 |
| 'aa\Z'm b\naa\n y $-[0] 2 |
| 'aa\z'm b\naa\n n - - |
| 'aa$'m b\naa\n y $-[0] 2 |
| 'aa\Z'm b\naa y $-[0] 2 |
| 'aa\z'm b\naa y $-[0] 2 |
| 'aa$'m b\naa y $-[0] 2 |
| aa\Z ac\nb\n n - - |
| aa\z ac\nb\n n - - |
| aa$ ac\nb\n n - - |
| aa\Z b\nac\n n - - |
| aa\z b\nac\n n - - |
| aa$ b\nac\n n - - |
| aa\Z b\nac n - - |
| aa\z b\nac n - - |
| aa$ b\nac n - - |
| 'aa\Z'm ac\nb\n n - - |
| 'aa\z'm ac\nb\n n - - |
| 'aa$'m ac\nb\n n - - |
| 'aa\Z'm b\nac\n n - - |
| 'aa\z'm b\nac\n n - - |
| 'aa$'m b\nac\n n - - |
| 'aa\Z'm b\nac n - - |
| 'aa\z'm b\nac n - - |
| 'aa$'m b\nac n - - |
| aa\Z ca\nb\n n - - |
| aa\z ca\nb\n n - - |
| aa$ ca\nb\n n - - |
| aa\Z b\nca\n n - - |
| aa\z b\nca\n n - - |
| aa$ b\nca\n n - - |
| aa\Z b\nca n - - |
| aa\z b\nca n - - |
| aa$ b\nca n - - |
| 'aa\Z'm ca\nb\n n - - |
| 'aa\z'm ca\nb\n n - - |
| 'aa$'m ca\nb\n n - - |
| 'aa\Z'm b\nca\n n - - |
| 'aa\z'm b\nca\n n - - |
| 'aa$'m b\nca\n n - - |
| 'aa\Z'm b\nca n - - |
| 'aa\z'm b\nca n - - |
| 'aa$'m b\nca n - - |
| ab\Z ab\nb\n n - - |
| ab\z ab\nb\n n - - |
| ab$ ab\nb\n n - - |
| ab\Z b\nab\n y $-[0] 2 |
| ab\z b\nab\n n - - |
| ab$ b\nab\n y $-[0] 2 |
| ab\Z b\nab y $-[0] 2 |
| ab\z b\nab y $-[0] 2 |
| ab$ b\nab y $-[0] 2 |
| 'ab\Z'm ab\nb\n n - - |
| 'ab\z'm ab\nb\n n - - |
| 'ab$'m ab\nb\n y $-[0] 0 |
| 'ab\Z'm b\nab\n y $-[0] 2 |
| 'ab\z'm b\nab\n n - - |
| 'ab$'m b\nab\n y $-[0] 2 |
| 'ab\Z'm b\nab y $-[0] 2 |
| 'ab\z'm b\nab y $-[0] 2 |
| 'ab$'m b\nab y $-[0] 2 |
| ab\Z ac\nb\n n - - |
| ab\z ac\nb\n n - - |
| ab$ ac\nb\n n - - |
| ab\Z b\nac\n n - - |
| ab\z b\nac\n n - - |
| ab$ b\nac\n n - - |
| ab\Z b\nac n - - |
| ab\z b\nac n - - |
| ab$ b\nac n - - |
| 'ab\Z'm ac\nb\n n - - |
| 'ab\z'm ac\nb\n n - - |
| 'ab$'m ac\nb\n n - - |
| 'ab\Z'm b\nac\n n - - |
| 'ab\z'm b\nac\n n - - |
| 'ab$'m b\nac\n n - - |
| 'ab\Z'm b\nac n - - |
| 'ab\z'm b\nac n - - |
| 'ab$'m b\nac n - - |
| ab\Z ca\nb\n n - - |
| ab\z ca\nb\n n - - |
| ab$ ca\nb\n n - - |
| ab\Z b\nca\n n - - |
| ab\z b\nca\n n - - |
| ab$ b\nca\n n - - |
| ab\Z b\nca n - - |
| ab\z b\nca n - - |
| ab$ b\nca n - - |
| 'ab\Z'm ca\nb\n n - - |
| 'ab\z'm ca\nb\n n - - |
| 'ab$'m ca\nb\n n - - |
| 'ab\Z'm b\nca\n n - - |
| 'ab\z'm b\nca\n n - - |
| 'ab$'m b\nca\n n - - |
| 'ab\Z'm b\nca n - - |
| 'ab\z'm b\nca n - - |
| 'ab$'m b\nca n - - |
| abb\Z abb\nb\n n - - |
| abb\z abb\nb\n n - - |
| abb$ abb\nb\n n - - |
| abb\Z b\nabb\n y $-[0] 2 |
| abb\z b\nabb\n n - - |
| abb$ b\nabb\n y $-[0] 2 |
| abb\Z b\nabb y $-[0] 2 |
| abb\z b\nabb y $-[0] 2 |
| abb$ b\nabb y $-[0] 2 |
| 'abb\Z'm abb\nb\n n - - |
| 'abb\z'm abb\nb\n n - - |
| 'abb$'m abb\nb\n y $-[0] 0 |
| 'abb\Z'm b\nabb\n y $-[0] 2 |
| 'abb\z'm b\nabb\n n - - |
| 'abb$'m b\nabb\n y $-[0] 2 |
| 'abb\Z'm b\nabb y $-[0] 2 |
| 'abb\z'm b\nabb y $-[0] 2 |
| 'abb$'m b\nabb y $-[0] 2 |
| abb\Z ac\nb\n n - - |
| abb\z ac\nb\n n - - |
| abb$ ac\nb\n n - - |
| abb\Z b\nac\n n - - |
| abb\z b\nac\n n - - |
| abb$ b\nac\n n - - |
| abb\Z b\nac n - - |
| abb\z b\nac n - - |
| abb$ b\nac n - - |
| 'abb\Z'm ac\nb\n n - - |
| 'abb\z'm ac\nb\n n - - |
| 'abb$'m ac\nb\n n - - |
| 'abb\Z'm b\nac\n n - - |
| 'abb\z'm b\nac\n n - - |
| 'abb$'m b\nac\n n - - |
| 'abb\Z'm b\nac n - - |
| 'abb\z'm b\nac n - - |
| 'abb$'m b\nac n - - |
| abb\Z ca\nb\n n - - |
| abb\z ca\nb\n n - - |
| abb$ ca\nb\n n - - |
| 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 $1- x- |
| foo.bart foo.bart y - - |
| '^d[x][x][x]'m abcd\ndxxx y - - |
| .X(.+)+X bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - # TODO: ICU doesn't optimize on trailing literals in pattern. |
| .X(.+)+XX bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .XX(.+)+X bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .X(.+)+X bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .X(.+)+XX bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .XX(.+)+X bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .X(.+)+[X] bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .X(.+)+[X][X] bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .XX(.+)+[X] bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .X(.+)+[X] bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .X(.+)+[X][X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .XX(.+)+[X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .[X](.+)+[X] bbbbXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .[X](.+)+[X][X] bbbbXcXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .[X][X](.+)+[X] bbbbXXcXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa yi - - |
| .[X](.+)+[X] bbbbXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .[X](.+)+[X][X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| .[X][X](.+)+[X] bbbbXXXaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ni - - |
| tt+$ xxxtt y - - |
| ([a-\d]+) za-9z yi $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= iy $1 0-z Set difference in ICU |
| \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 yi -$1-$2- -a-- Java disagrees. Not clear who is right. |
| '^.{9}abc.*\n'm 123\nabcabcabcabc\n y - - |
| ^(a)?a$ 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 yi $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 yi - - |