/(a)b|/I

/abc/I

    abc

    defabc

    \Aabc

    *** Failers

    \Adefabc

    ABC

/^abc/I

    abc

    \Aabc

    *** Failers

    defabc

    \Adefabc

/a+bc/I

/a*bc/I

/a{3}bc/I

/(abc|a+z)/I

/^abc$/I

    abc

    *** Failers

    def\nabc

/ab\idef/X

/(?X)ab\idef/X

/x{5,4}/

/z{65536}/

/[abcd/

/(?X)[\B]/

/[z-a]/

/^*/

/(abc/

/(?# abc/

/(?z)abc/

/.*b/I

/.*?b/I

/cat|dog|elephant/I

    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

    this sentences rambles on and on for a while and then reaches elephant

/cat|dog|elephant/IiS

    this sentence eventually mentions a CAT cat

    this sentences rambles on and on for a while to elephant ElePhant

/a|[bcd]/IS

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

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

/(ab\2)/

/{4,5}abc/

/(a)(b)(c)\2/I

    abcb

    \O0abcb

    \O3abcb

    \O6abcb

    \O9abcb

    \O12abcb

/(a)bc|(a)(b)\2/I

    abc

    \O0abc

    \O3abc

    \O6abc

    aba

    \O0aba

    \O3aba

    \O6aba

    \O9aba

    \O12aba

/abc$/IE

    abc

    *** Failers

    abc\n

    abc\ndef

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

/the quick brown fox/I

    the quick brown fox

    this is a line with the quick brown fox

/the quick brown fox/IA

    the quick brown fox

    *** Failers

    this is a line with the quick brown fox

/ab(?z)cd/

/^abc|def/I

    abcdef

    abcdef\B

/.*((abc)$|(def))/I

    defabc

    \Zdefabc

/abc/IP

    abc

    *** Failers

/^abc|def/IP

    abcdef

    abcdef\B

/.*((abc)$|(def))/IP

    defabc

    \Zdefabc

/the quick brown fox/IP

    the quick brown fox

    *** Failers

    The Quick Brown Fox

/the quick brown fox/IPi

    the quick brown fox

    The Quick Brown Fox

/abc.def/IP

    *** Failers

    abc\ndef

/abc$/IP

    abc

    abc\n

/(abc)\2/IP

/(abc\1)/IP

    abc

/)/

/a[]b/

/[^aeiou ]{3,}/I

    co-processors, and for

/<.*>/I

    abc<def>ghi<klm>nop

/<.*?>/I

    abc<def>ghi<klm>nop

/<.*>/IU

    abc<def>ghi<klm>nop

/(?U)<.*>/I

    abc<def>ghi<klm>nop

/<.*?>/IU

    abc<def>ghi<klm>nop

/={3,}/IU

    abc========def

/(?U)={3,}?/I

    abc========def

/(?<!bar|cattle)foo/I

    foo

    catfoo

    *** Failers

    the barfoo

    and cattlefoo

/(?<=a+)b/

/(?<=aaa|b{0,3})b/

/(?<!(foo)a\1)bar/

/(?i)abc/I

/(a|(?m)a)/I

/(?i)^1234/I

/(^b|(?i)^d)/I

/(?s).*/I

/[abcd]/IS

/(?i)[abcd]/IS

/(?m)[xy]|(b|c)/IS

/(^a|^b)/Im

/(?i)(^a|^b)/Im

/(a)(?(1)a|b|c)/

/(?(?=a)a|b|c)/

/(?(1a)/

/(?(1a))/

/(?(?i))/

/(?(abc))/

/(?(?<ab))/

/((?s)blah)\s+\1/I

/((?i)blah)\s+\1/I

/((?i)b)/IDZS

/(a*b|(?i:c*(?-i)d))/IS

/a$/I

    a

    a\n

    *** Failers

    \Za

    \Za\n

/a$/Im

    a

    a\n

    \Za\n

    *** Failers

    \Za

/\Aabc/Im

/^abc/Im

/^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I

  aaaaabbbbbcccccdef

/(?<=foo)[ab]/IS

/(?<!foo)(alpha|omega)/IS

/(?!alphabet)[ab]/IS

/(?<=foo\n)^bar/Im

    foo\nbarbar

    ***Failers

    rhubarb

    barbell

    abc\nbarton

/^(?<=foo\n)bar/Im

    foo\nbarbar

    ***Failers

    rhubarb

    barbell

    abc\nbarton

/(?>^abc)/Im

    abc

    def\nabc

    *** Failers

    defabc

/(?<=ab(c+)d)ef/

/(?<=ab(?<=c+)d)ef/

/(?<=ab(c|de)f)g/

/The next three are in testinput2 because they have variable length branches/

/(?<=bullock|donkey)-cart/I

    the bullock-cart

    a donkey-cart race

    *** Failers

    cart

    horse-and-cart

/(?<=ab(?i)x|y|z)/I

/(?>.*)(?<=(abcd)|(xyz))/I

    alphabetabcd

    endingxyz

/(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I

    abxyZZ

    abXyZZ

    ZZZ

    zZZ

    bZZ

    BZZ

    *** Failers

    ZZ

    abXYZZ

    zzz

    bzz

/(?<!(foo)a)bar/I

    bar

    foobbar

    *** Failers

    fooabar

/This one is here because Perl 5.005_02 doesn't fail it/I

/^(a)?(?(1)a|b)+$/I

    *** Failers

    a

/This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/I

/^(a\1?){4}$/I

    aaaaaa

/These are syntax tests from Perl 5.005/I

/a[b-a]/

/a[]b/

/a[/

/*a/

/(*)b/

/abc)/

/(abc/

/a**/

/)(/

/\1/

/\2/

/(a)|\2/

/a[b-a]/Ii

/a[]b/Ii

/a[/Ii

/*a/Ii

/(*)b/Ii

/abc)/Ii

/(abc/Ii

/a**/Ii

/)(/Ii

/:(?:/

/(?<%)b/

/a(?{)b/

/a(?{{})b/

/a(?{}})b/

/a(?{"{"})b/

/a(?{"{"}})b/

/(?(1?)a|b)/

/[a[:xyz:/

/(?<=x+)y/

/a{37,17}/

/abc/\

/abc/\P

/abc/\i

/(a)bc(d)/I

    abcd

    abcd\C2

    abcd\C5

/(.{20})/I

    abcdefghijklmnopqrstuvwxyz

    abcdefghijklmnopqrstuvwxyz\C1

    abcdefghijklmnopqrstuvwxyz\G1

/(.{15})/I

    abcdefghijklmnopqrstuvwxyz

    abcdefghijklmnopqrstuvwxyz\C1\G1

/(.{16})/I

    abcdefghijklmnopqrstuvwxyz

    abcdefghijklmnopqrstuvwxyz\C1\G1\L

/^(a|(bc))de(f)/I

    adef\G1\G2\G3\G4\L

    bcdef\G1\G2\G3\G4\L

    adefghijk\C0

/^abc\00def/I

    abc\00def\L\C0

/word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+

)((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+

)?)?)?)?)?)?)?)?)?otherword/I

/.*X/IDZ

/.*X/IDZs

/(.*X|^B)/IDZ

/(.*X|^B)/IDZs

/(?s)(.*X|^B)/IDZ

/(?s:.*X|^B)/IDZ

/\Biss\B/I+

    Mississippi

/\Biss\B/I+P

    Mississippi

/iss/IG+

    Mississippi

/\Biss\B/IG+

    Mississippi

/\Biss\B/Ig+

    Mississippi

    *** Failers

    Mississippi\A

/(?<=[Ms])iss/Ig+

    Mississippi

/(?<=[Ms])iss/IG+

    Mississippi

/^iss/Ig+

    ississippi

/.*iss/Ig+

    abciss\nxyzisspqr

/.i./I+g

    Mississippi

    Mississippi\A

    Missouri river

    Missouri river\A

/^.is/I+g

    Mississippi

/^ab\n/Ig+

    ab\nab\ncd

/^ab\n/Img+

    ab\nab\ncd

/abc/I

/abc|bac/I

/(abc|bac)/I

/(abc|(c|dc))/I

/(abc|(d|de)c)/I

/a*/I

/a+/I

/(baa|a+)/I

/a{0,3}/I

/baa{3,}/I

/"([^\\"]+|\\.)*"/I

/(abc|ab[cd])/I

/(a|.)/I

/a|ba|\w/I

/abc(?=pqr)/I