/(a)b|/

/(a*)*/

/(abc|)+/

/abc/
    abc
    defabc
    \Aabc
    \IABC
    *** Failers
    \Adefabc
    ABC

/^abc/
    abc
    \Aabc
    *** Failers
    defabc
    \Adefabc

/a+bc/

/a*bc/

/a{3}bc/

/(abc|a+z)/

/^abc$/
    abc
    \Mdef\nabc
    *** Failers
    def\nabc

/abc\/

/ab\gdef/X

/x{5,4}/

/z{65536}/

/[abcd/

/[\B]/

/[a-\w]/

/[z-a]/

/^*/

/(abc/

/(?# abc/

/(?z)abc/

/.*b/

/.*?b/

/cat|dog|elephant/
    this sentence eventually mentions a cat
    this sentences rambles on and on for a while and then reaches elephant

/cat|dog|elephant/S
    this sentence eventually mentions a cat
    this sentences rambles on and on for a while and then reaches elephant

/cat|dog|elephant/iS
    this sentence eventually mentions a CAT cat
    this sentences rambles on and on for a while to elephant ElePhant

/cat|dog|elephant/IS
    this sentence eventually mentions a CAT cat
    this sentences rambles on and on for a while to elephant ElePhant

/cat|dog|elephant/IS
    \Ithis sentence eventually mentions a CAT cat
    \Ithis sentences rambles on and on for a while to elephant ElePhant

/a|[bcd]/S

/(a|[^\dZ])/S

/(a|b)*[\s]/S

/(ab\2)/

/{4,5}abc/

/(a)(b)(c)\2/
    abcb
    \O0abcb
    \O2abcb
    \O4abcb
    \O6abcb
    \O8abcb

/(a)bc|(a)(b)\2/
    abc
    \O0abc
    \O2abc
    \O4abc
    aba
    \O0aba
    \O2aba
    \O4aba
    \O6aba
    \O8aba

/^a.b/
    \Sa\nb

/abc$/E
    abc
    *** Failers
    abc\n
    abc\ndef

/abc$/
    *** Failers
    \Eabc\n
    \Eabc\ndef

/abc$/m
    \Eabc\n
    \Eabc\ndef

/(a)(b)(c)(d)(e)\6/

/the quick brown fox/
    the quick brown fox
    this is a line with the quick brown fox

/the quick brown fox/A
    the quick brown fox
    *** Failers
    this is a line with the quick brown fox

/ab(?z)cd/

".*/\Xfoo"X
    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/

".*/\Xfoo"X
    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo

/(\.\d\d[1-9]?)\d+/
    1.230003938
    1.875000282
    1.235 

/(\.\d\d[1-9]?)\X\d+/X
    1.230003938
    1.875000282
    *** Failers 
    1.235 

/(\.\d\d((?=0)|\d(?=\d)))/
    1.230003938
    1.875000282
    *** Failers 
    1.235 

/^(\w+\X|\s+\X)*$/X
    now is the time for all good men to come to the aid of the party
    *** Failers
    this is not a line with only words and spaces!
    
/^abc|def/
    abcdef
    abcdef\B

/.*((abc)$|(def))/
    defabc
    \Zdefabc

/abc/P
    abc
    *** Failers
    
/^abc|def/P
    abcdef
    abcdef\B

/.*((abc)$|(def))/P
    defabc
    \Zdefabc
  
/the quick brown fox/P
    the quick brown fox
    *** Failers 
    The Quick Brown Fox 

/the quick brown fox/Pi
    the quick brown fox
    The Quick Brown Fox 

/abc.def/P
    *** Failers
    abc\ndef
    
/abc$/P
    abc
    abc\n 

/abc\/P

/(abc)\2/P

/(abc\1)/P
    abc

"(?>.*/)foo"X
    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/

"(?>.*/)foo"X
    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/and/foo

/(?>(\.\d\d[1-9]?))\d+/X
    1.230003938
    1.875000282
    *** Failers 
    1.235 

/^((?>\w+)|(?>\s+))*$/X
    now is the time for all good men to come to the aid of the party
    *** Failers
    this is not a line with only words and spaces!
    
/(\d+)(\w)/X
    12345a
    12345+ 

/((?>\d+))(\w)/X
    12345a
    *** Failers
    12345+ 

/([a]*)*/

/([ab]*)*/

/([^a]*)*/

/([^ab]*)*/

/([a]*?)*/

/([ab]*?)*/

/([^a]*?)*/

/([^ab]*?)*/

/(?>a*)*/X

/((?>a*))*/X

/((?>a*?))*/X

/)/

/a[]b/

/[^a]/
    \Iaaaabcd
    \IaaAabcd 

/[^az]/
    \Iaaaabcd
    \IaaAabcd 

/[^az]/
    \Izazabcd
    \IAaZabcd 
    
/[^aeiou ]{3,}/
    co-processors, and for 
    \Ico-processors, and for 
    
/((a)*)*/
 
/((a|b|c)*)*/

/ End of test input /