google3/third_party/grte/v5_src/glibc-2.27/posix/PCRE.tests

# PCRE version 4.4 21-August-2003

# Tests taken from PCRE and modified to suit glibc regex.
#
# PCRE LICENCE
# ------------
#
# PCRE is a library of functions to support regular expressions whose syntax
# and semantics are as close as possible to those of the Perl 5 language.
#
# Written by: Philip Hazel <ph10@cam.ac.uk>
#
# University of Cambridge Computing Service,
# Cambridge, England. Phone: +44 1223 334714.
#
# Copyright (c) 1997-2003 University of Cambridge
#
# Permission is granted to anyone to use this software for any purpose on any
# computer system, and to redistribute it freely, subject to the following
# restrictions:
#
# 1. This software is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# 2. The origin of this software must not be misrepresented, either by
#    explicit claim or by omission. In practice, this means that if you use
#    PCRE in software that you distribute to others, commercially or
#    otherwise, you must put a sentence like this
#
#      Regular expression support is provided by the PCRE library package,
#      which is open source software, written by Philip Hazel, and copyright
#      by the University of Cambridge, England.
#
#    somewhere reasonably visible in your documentation and in any relevant
#    files or online help data or similar. A reference to the ftp site for
#    the source, that is, to
#
#      ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
#
#    should also be given in the documentation. However, this condition is not
#    intended to apply to whole chains of software. If package A includes PCRE,
#    it must acknowledge it, but if package B is software that includes package
#    A, the condition is not imposed on package B (unless it uses PCRE
#    independently).
#
# 3. Altered versions must be plainly marked as such, and must not be
#    misrepresented as being the original software.
#
# 4. If PCRE is embedded in any software that is released under the GNU
#   General Purpose Licence (GPL), or Lesser General Purpose Licence (LGPL),
#   then the terms of that licence shall supersede any condition above with
#   which it is incompatible.
#
# The documentation for PCRE, supplied in the "doc" directory, is distributed
# under the same terms as the software itself.
#
# End
#

/the quick brown fox/
    the quick brown fox
 0: the quick brown fox
    The quick brown FOX
No match
    What do you know about the quick brown fox?
 0: the quick brown fox
    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

/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
    *** Failers
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
    *** Failers
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: 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
    *** Failers
No match
    aaac
No match
    abbbbbbbbbbbac
No match

/^[]cde]/
    ]thing
 0: ]
    cthing
 0: c
    dthing
 0: d
    ething
 0: e
    *** Failers
No match
    athing
No match
    fthing
No match

/^[^]cde]/
    athing
 0: a
    fthing
 0: f
    *** Failers
 0: *
    ]thing
No match
    cthing
No match
    dthing
No match
    ething
No match

/^[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
    *** Failers
No match
    abc
No match

/^.*nter/
    enter
 0: enter
    inter
 0: inter
    uponter
 0: uponter

/^xxx[0-9]+$/
    xxx0
 0: xxx0
    xxx1234
 0: xxx1234
    *** Failers
No match
    xxx
No match

/^.+[0-9][0-9][0-9]$/
    x123
 0: x123
    xx123
 0: xx123
    123456
 0: 123456
    *** Failers
No match
    123
No match
    x1234
 0: x1234

/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
    abc!pqr=apquxz.ixr.zzz.ac.uk
 0: abc!pqr=apquxz.ixr.zzz.ac.uk
 1: abc
 2: pqr
    *** Failers
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: :
    *** Fail if we don't
No match

/([0-9a-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
    *** Failers
No match
    0zzz
No match
    gzzz
No match
    Any old rubbish
No match

/^.*\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{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
    *** Failers
No match
    .1.2.3333
No match
    1.2.3
No match
    1234.2.3
No match

/^([0-9]+)\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
    *** Failers
No match
    1IN SOA non-sp1 non-sp2(
No match

/^[a-zA-Z0-9][a-zA-Z0-9-]*(\.[a-zA-Z0-9][a-zA-z0-9-]*)*\.$/
    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-
    *** Failers
No match
    -abc.peq.
No match

/^\*\.[a-z]([a-z0-9-]*[a-z0-9]+)?(\.[a-z]([a-z0-9-]*[a-z0-9]+)?)*$/
    *.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
    *** Failers
No match
    *.0
No match
    *.a-
No match
    *.a-b.c-
No match
    *.c-a.0-c
No match

/^[0-9a-f](\.[0-9a-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
    *** Failers
No match
    "1234" : things
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*\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/
    az
 0: az
    aaaz
 0: aaaz
    aa
 0: aa
    aaaa
 0: aaaa
    aa+
 0: aa

/^[0-9]{8}\w{2,}/
    1234567890
 0: 1234567890
    12345678ab
 0: 12345678ab
    12345678__
 0: 12345678__
    *** Failers
No match
    1234567
No match

/^[aeiou0-9]{4,5}$/
    uoie
 0: uoie
    1234
 0: 1234
    12345
 0: 12345
    aaaaa
 0: aaaaa
    *** Failers
No match
    123456
No match

/\`(abc|def)=(\1){2,3}\'/
    abc=abcabc
 0: abc=abcabc
 1: abc
 2: abc
    def=defdefdef
 0: def=defdefdef
 1: def
 2: def
    *** Failers
No match
    abc=defdef
No match

/(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: <unset>
 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}[0-9]{1,2}\s+[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: Sep 
    From abcd  Mon Sep  1 12:33:02 1997
 0: From abcd  Mon Sep  1 12:33
 1: Sep  
    *** Failers
No match
    From abcd  Sep 01 12:33:02 1997
No match

/^(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

/^[ab]{1,3}(ab*|b)/
    aabbbbb
 0: aabbbbb
 1: abbbbb

/^(cow|)\1(bell)/
    cowcowbell
 0: cowcowbell
 1: cow
 2: bell
    bell
 0: bell
 1: 
 2: bell
    *** Failers
No match
    cowbell
No match

/^(a|)\1+b/
    aab
 0: aab
 1: a
    aaaab
 0: aaaab
 1: a
    b
 0: b
 1: 
    *** Failers
No match
    ab
No match

/^(a|)\1{2}b/
    aaab
 0: aaab
 1: a
    b
 0: b
 1: 
    *** Failers
No match
    ab
No match
    aab
No match
    aaaab
No match

/^(a|)\1{2,3}b/
    aaab
 0: aaab
 1: a
    aaaab
 0: aaaab
 1: a
    b
 0: b
 1: 
    *** Failers
No match
    ab
No match
    aab
No match
    aaaaab
No match

/ab{1,3}bc/
    abbbbc
 0: abbbbc
    abbbc
 0: abbbc
    abbc
 0: abbc
    *** Failers
No match
    abc
No match
    abbbbbc
No match

/([^.]*)\.([^:]*):[T ]+(.*)/
    track1.title:TBlah blah blah
 0: track1.title:TBlah blah blah
 1: track1
 2: title
 3: Blah blah blah

/([^.]*)\.([^:]*):[T ]+(.*)/i
    track1.title:TBlah blah blah
 0: track1.title:TBlah blah blah
 1: track1
 2: title
 3: Blah blah blah

/([^.]*)\.([^:]*):[t ]+(.*)/i
    track1.title:TBlah blah blah
 0: track1.title:TBlah blah blah
 1: track1
 2: title
 3: Blah blah blah

/^abc$/
    abc
 0: abc
    *** Failers
No match

/[-az]+/
    az-
 0: az-
    *** Failers
 0: a
    b
No match

/[az-]+/
    za-
 0: za-
    *** Failers
 0: a
    b
No match

/[a-z]+/
    abcdxyz
 0: abcdxyz

/[0-9-]+/
    12-34
 0: 12-34
    *** Failers
No match
    aaa
No match

/(abc)\1/i
    abcabc
 0: abcabc
 1: abc
    ABCabc
 0: ABCabc
 1: ABC
    abcABC
 0: abcABC
 1: abc

/a{0}bc/
    bc
 0: bc

/^([^a])([^b])([^c]*)([^d]{3,4})/
    baNOTccccd
 0: baNOTcccc
 1: b
 2: a
 3: NOT
 4: cccc
    baNOTcccd
 0: baNOTccc
 1: b
 2: a
 3: NOT
 4: ccc
    baNOTccd
 0: baNOTcc
 1: b
 2: a
 3: NO
 4: Tcc
    bacccd
 0: baccc
 1: b
 2: a
 3: 
 4: ccc
    *** Failers
 0: *** Failers
 1: *
 2: *
 3: * Fail
 4: ers
    anything
No match
    baccd
No match

/[^a]/
    Abc
 0: A

/[^a]/i
    Abc 
 0: b

/[^a]+/
    AAAaAbc
 0: AAA

/[^a]+/i
    AAAaAbc
 0: bc

/[^k]$/
    abc
 0: c
    *** Failers
 0: s
    abk
No match

/[^k]{2,3}$/
    abc
 0: abc
    kbc
 0: bc
    kabc
 0: abc
    *** Failers
 0: ers
    abk
No match
    akb
No match
    akk 
No match

/^[0-9]{8,}@.+[^k]$/
    12345678@a.b.c.d
 0: 12345678@a.b.c.d
    123456789@x.y.z
 0: 123456789@x.y.z
    *** Failers
No match
    12345678@x.y.uk
No match
    1234567@a.b.c.d       
No match

/(a)\1{8,}/
    aaaaaaaaa
 0: aaaaaaaaa
 1: a
    aaaaaaaaaa
 0: aaaaaaaaaa
 1: a
    *** Failers
No match
    aaaaaaa   
No match

/[^a]/
    aaaabcd
 0: b
    aaAabcd 
 0: A

/[^a]/i
    aaaabcd
 0: b
    aaAabcd 
 0: b

/[^az]/
    aaaabcd
 0: b
    aaAabcd 
 0: A

/[^az]/i
    aaaabcd
 0: b
    aaAabcd 
 0: b

/P[^*]TAIRE[^*]{1,6}LL/
    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
 0: PSTAIREISLL

/P[^*]TAIRE[^*]{1,}LL/
    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx
 0: PSTAIREISLL

/(\.[0-9][0-9][1-9]?)[0-9]+/
    1.230003938
 0: .230003938
 1: .23
    1.875000282   
 0: .875000282
 1: .875
    1.235  
 0: .235
 1: .23
                  
/\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 
    
/(.*)([0-9]*)/
    I have 2 numbers: 53147
 0: I have 2 numbers: 53147
 1: I have 2 numbers: 53147
 2: 
    
/(.*)([0-9]+)/
    I have 2 numbers: 53147
 0: I have 2 numbers: 53147
 1: I have 2 numbers: 5314
 2: 7

/(.*)([0-9]+)$/
    I have 2 numbers: 53147
 0: I have 2 numbers: 53147
 1: I have 2 numbers: 5314
 2: 7

/(.*)\b([0-9]+)$/
    I have 2 numbers: 53147
 0: I have 2 numbers: 53147
 1: I have 2 numbers: 
 2: 53147

/(.*[^0-9])([0-9]+)$/
    I have 2 numbers: 53147
 0: I have 2 numbers: 53147
 1: I have 2 numbers: 
 2: 53147

/[[:digit:]][[:digit:]]\/[[:digit:]][[:digit:]]\/[[:digit:]][[:digit:]][[:digit:]][[:digit:]]/
    01/01/2000
 0: 01/01/2000

/^(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}/
    bcd
No match
    abc
 0: a
 1: a
    aab  
 0: a
 1: a

/^(a){1,2}/
    bcd
No match
    abc
 0: a
 1: a
    aab  
 0: aa
 1: a

/^(a){1,3}/
    bcd
No match
    abc
 0: a
 1: a
    aab
 0: aa
 1: a
    aaa   
 0: aaa
 1: a

/^(a){1,}/
    bcd
No match
    abc
 0: a
 1: a
    aab
 0: aa
 1: a
    aaa
 0: aaa
 1: a
    aaaaaaaa    
 0: aaaaaaaa
 1: a

/^[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

/^[[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]]/
    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
    *** Failers 
No match
    z 
No match

/abcde{0,0}/
    abcd
 0: abcd
    *** Failers
No match
    abce  
No match

/ab[cd]{0,0}e/
    abe
 0: abe
    *** Failers
No match
    abcde 
No match
    
/ab(c){0,0}d/
    abd
 0: abd
    *** Failers
No match
    abcd   
No match

/a(b*)/
    a
 0: a
 1: 
    ab
 0: ab
 1: b
    abbbb
 0: abbbb
 1: bbbb
    *** Failers
 0: a
 1: 
    bbbbb    
No match
    
/ab[0-9]{0}e/
    abe
 0: abe
    *** Failers
No match
    ab1e   
No match
    
/(A|B)*CD/
    CD 
 0: CD

/(AB)*\1/
    ABABAB
 0: ABABAB
 1: AB
    
/([0-9]+)(\w)/
    12345a
 0: 12345a
 1: 12345
 2: a
    12345+ 
 0: 12345
 1: 1234
 2: 5

/(abc|)+/
    abc
 0: abc
 1: abc
    abcabc
 0: abcabc
 1: abc
    abcabcabc
 0: abcabcabc
 1: abc
    xyz      
 0: 
 1: 

/([a]*)*/
    a
 0: a
 1: a
    aaaaa 
 0: aaaaa
 1: aaaaa

/([ab]*)*/
    a
 0: a
 1: a
    b
 0: b
 1: b
    ababab
 0: ababab
 1: ababab
    aaaabcde
 0: aaaab
 1: aaaab
    bbbb    
 0: bbbb
 1: bbbb

/([^a]*)*/
    b
 0: b
 1: b
    bbbb
 0: bbbb
 1: bbbb
    aaa   
 0: 

/([^ab]*)*/
    cccc
 0: cccc
 1: cccc
    abab  
 0: 

/abc/
    abc
 0: abc
    xabcy
 0: abc
    ababc
 0: abc
    *** Failers
No match
    xbc
No match
    axc
No match
    abx
No match

/ab*c/
    abc
 0: abc

/ab*bc/
    abc
 0: abc
    abbc
 0: abbc
    abbbbc
 0: abbbbc

/.{1}/
    abbbbc
 0: a

/.{3,4}/
    abbbbc
 0: abbb

/ab{0,}bc/
    abbbbc
 0: abbbbc

/ab+bc/
    abbc
 0: abbc
    *** Failers
No match
    abc
No match
    abq
No match

/ab+bc/
    abbbbc
 0: abbbbc

/ab{1,}bc/
    abbbbc
 0: abbbbc

/ab{1,3}bc/
    abbbbc
 0: abbbbc

/ab{3,4}bc/
    abbbbc
 0: abbbbc

/ab{4,5}bc/
    *** Failers
No match
    abq
No match
    abbbbc
No match

/ab?bc/
    abbc
 0: abbc
    abc
 0: abc

/ab{0,1}bc/
    abc
 0: abc

/ab?c/
    abc
 0: abc

/ab{0,1}c/
    abc
 0: abc

/^abc$/
    abc
 0: abc
    *** Failers
No match
    abbbbc
No match
    abcc
No match

/^abc/
    abcc
 0: abc

/abc$/
    aabc
 0: abc
    *** Failers
No match
    aabc
 0: abc
    aabcd
No match

/^/
    abc
 0: 

/$/
    abc
 0: 

/a.c/
    abc
 0: abc
    axc
 0: axc

/a.*c/
    axyzc
 0: axyzc

/a[bc]d/
    abd
 0: abd
    *** Failers
No match
    axyzd
No match
    abc
No match

/a[b-d]e/
    ace
 0: ace

/a[b-d]/
    aac
 0: ac

/a[-b]/
    a-
 0: a-

/a[b-]/
    a-
 0: a-

/a[]]b/
    a]b
 0: a]b

/a[^bc]d/
    aed
 0: aed
    *** Failers
No match
    abd
No match
    abd
No match

/a[^-b]c/
    adc
 0: adc

/a[^]b]c/
    adc
 0: adc
    *** Failers
No match
    a-c
 0: a-c
    a]c
No match

/\ba\b/
    a-
 0: a
    -a
 0: a
    -a-
 0: a

/\by\b/
    *** Failers
No match
    xy
No match
    yz
No match
    xyz
No match

/\Ba\B/
    *** Failers
 0: a
    a-
No match
    -a
No match
    -a-
No match

/\By\b/
    xy
 0: y

/\by\B/
    yz
 0: y

/\By\B/
    xyz
 0: y

/\w/
    a
 0: a

/\W/
    -
 0: -
    *** Failers
 0: *
    -
 0: -
    a
No match

/a\sb/
    a b
 0: a b

/a\Sb/
    a-b
 0: a-b
    *** Failers
No match
    a-b
 0: a-b
    a b
No match

/[0-9]/
    1
 0: 1

/[^0-9]/
    -
 0: -
    *** Failers
 0: *
    -
 0: -
    1
No match

/ab|cd/
    abc
 0: ab
    abcd
 0: ab

/()ef/
    def
 0: ef
 1: 

/a\(b/
    a(b
 0: a(b

/a\(*b/
    ab
 0: ab
    a((b
 0: a((b

/((a))/
    abc
 0: a
 1: a
 2: a

/(a)b(c)/
    abc
 0: abc
 1: a
 2: c

/a+b+c/
    aabbabc
 0: abc

/a{1,}b{1,}c/
    aabbabc
 0: abc

/(a+|b)*/
    ab
 0: ab
 1: b

/(a+|b){0,}/
    ab
 0: ab
 1: b

/(a+|b)+/
    ab
 0: ab
 1: b

/(a+|b){1,}/
    ab
 0: ab
 1: b

/(a+|b)?/
    ab
 0: a
 1: a

/(a+|b){0,1}/
    ab
 0: a
 1: a

/[^ab]*/
    cde
 0: cde

/abc/
    *** Failers
No match
    b
No match
    

/a*/
    

/([abc])*d/
    abbbcd
 0: abbbcd
 1: c

/([abc])*bcd/
    abcd
 0: abcd
 1: a

/a|b|c|d|e/
    e
 0: e

/(a|b|c|d|e)f/
    ef
 0: ef
 1: e

/abcd*efg/
    abcdefg
 0: abcdefg

/ab*/
    xabyabbbz
 0: ab
    xayabbbz
 0: a

/(ab|cd)e/
    abcde
 0: cde
 1: cd

/[abhgefdc]ij/
    hij
 0: hij

/(abc|)ef/
    abcdef
 0: ef
 1: 

/(a|b)c*d/
    abcd
 0: bcd
 1: b

/(ab|ab*)bc/
    abc
 0: abc
 1: a

/a([bc]*)c*/
    abc
 0: abc
 1: bc

/a([bc]*)(c*d)/
    abcd
 0: abcd
 1: bc
 2: d

/a([bc]+)(c*d)/
    abcd
 0: abcd
 1: bc
 2: d

/a([bc]*)(c+d)/
    abcd
 0: abcd
 1: b
 2: cd

/a[bcd]*dcdcde/
    adcdcde
 0: adcdcde

/a[bcd]+dcdcde/
    *** Failers
No match
    abcde
No match
    adcdcde
No match

/(ab|a)b*c/
    abc
 0: abc
 1: ab

/((a)(b)c)(d)/
    abcd
 0: abcd
 1: abc
 2: a
 3: b
 4: d

/[a-zA-Z_][a-zA-Z0-9_]*/
    alpha
 0: alpha

/^a(bc+|b[eh])g|.h$/
    abh
 0: bh

/(bc+d$|ef*g.|h?i(j|k))/
    effgz
 0: effgz
 1: effgz
    ij
 0: ij
 1: ij
 2: j
    reffgz
 0: effgz
 1: effgz
    *** Failers
No match
    effg
No match
    bcdd
No match

/((((((((((a))))))))))/
    a
 0: a
 1: a
 2: a
 3: a
 4: a
 5: a
 6: a
 7: a
 8: a
 9: a
10: a

/((((((((((a))))))))))\9/
    aa
 0: aa
 1: a
 2: a
 3: a
 4: a
 5: a
 6: a
 7: a
 8: a
 9: a
10: a

/(((((((((a)))))))))/
    a
 0: a
 1: a
 2: a
 3: a
 4: a
 5: a
 6: a
 7: a
 8: a
 9: a

/multiple words of text/
    *** Failers
No match
    aa
No match
    uh-uh
No match

/multiple words/
    multiple words, yeah
 0: multiple words

/(.*)c(.*)/
    abcde
 0: abcde
 1: ab
 2: de

/\((.*), (.*)\)/
    (a, b)
 0: (a, b)
 1: a
 2: b

/abcd/
    abcd
 0: abcd

/a(bc)d/
    abcd
 0: abcd
 1: bc

/a[-]?c/
    ac
 0: ac

/(abc)\1/
    abcabc
 0: abcabc
 1: abc

/([a-c]*)\1/
    abcabc
 0: abcabc
 1: abc

/abc/i
    ABC
 0: ABC
    XABCY
 0: ABC
    ABABC
 0: ABC
    *** Failers
No match
    aaxabxbaxbbx
No match
    XBC
No match
    AXC
No match
    ABX
No match

/ab*c/i
    ABC
 0: ABC

/ab*bc/i
    ABC
 0: ABC
    ABBC
 0: ABBC

/ab+bc/i
    *** Failers
No match
    ABC
No match
    ABQ
No match

/ab+bc/i
    ABBBBC
 0: ABBBBC

/^abc$/i
    ABC
 0: ABC
    *** Failers
No match
    ABBBBC
No match
    ABCC
No match

/^abc/i
    ABCC
 0: ABC

/abc$/i
    AABC
 0: ABC

/^/i
    ABC
 0: 

/$/i
    ABC
 0: 

/a.c/i
    ABC
 0: ABC
    AXC
 0: AXC

/a.*c/i
    *** Failers
No match
    AABC
 0: AABC
    AXYZD
No match

/a[bc]d/i
    ABD
 0: ABD

/a[b-d]e/i
    ACE
 0: ACE
    *** Failers
No match
    ABC
No match
    ABD
No match

/a[b-d]/i
    AAC
 0: AC

/a[-b]/i
    A-
 0: A-

/a[b-]/i
    A-
 0: A-

/a[]]b/i
    A]B
 0: A]B

/a[^bc]d/i
    AED
 0: AED

/a[^-b]c/i
    ADC
 0: ADC
    *** Failers
No match
    ABD
No match
    A-C
No match

/a[^]b]c/i
    ADC
 0: ADC

/ab|cd/i
    ABC
 0: AB
    ABCD
 0: AB

/()ef/i
    DEF
 0: EF
 1: 

/$b/i
    *** Failers
No match
    A]C
No match
    B
No match

/a\(b/i
    A(B
 0: A(B

/a\(*b/i
    AB
 0: AB
    A((B
 0: A((B

/((a))/i
    ABC
 0: A
 1: A
 2: A

/(a)b(c)/i
    ABC
 0: ABC
 1: A
 2: C

/a+b+c/i
    AABBABC
 0: ABC

/a{1,}b{1,}c/i
    AABBABC
 0: ABC

/(a+|b)*/i
    AB
 0: AB
 1: B

/(a+|b){0,}/i
    AB
 0: AB
 1: B

/(a+|b)+/i
    AB
 0: AB
 1: B

/(a+|b){1,}/i
    AB
 0: AB
 1: B

/(a+|b)?/i
    AB
 0: A
 1: A

/(a+|b){0,1}/i
    AB
 0: A
 1: A

/[^ab]*/i
    CDE
 0: CDE

/([abc])*d/i
    ABBBCD
 0: ABBBCD
 1: C

/([abc])*bcd/i
    ABCD
 0: ABCD
 1: A

/a|b|c|d|e/i
    E
 0: E

/(a|b|c|d|e)f/i
    EF
 0: EF
 1: E

/abcd*efg/i
    ABCDEFG
 0: ABCDEFG

/ab*/i
    XABYABBBZ
 0: AB
    XAYABBBZ
 0: A

/(ab|cd)e/i
    ABCDE
 0: CDE
 1: CD

/[abhgefdc]ij/i
    HIJ
 0: HIJ

/^(ab|cd)e/i
    ABCDE
No match

/(abc|)ef/i
    ABCDEF
 0: EF
 1: 

/(a|b)c*d/i
    ABCD
 0: BCD
 1: B

/(ab|ab*)bc/i
    ABC
 0: ABC
 1: A

/a([bc]*)c*/i
    ABC
 0: ABC
 1: BC

/a([bc]*)(c*d)/i
    ABCD
 0: ABCD
 1: BC
 2: D

/a([bc]+)(c*d)/i
    ABCD
 0: ABCD
 1: BC
 2: D

/a([bc]*)(c+d)/i
    ABCD
 0: ABCD
 1: B
 2: CD

/a[bcd]*dcdcde/i
    ADCDCDE
 0: ADCDCDE

/a[bcd]+dcdcde/i

/(ab|a)b*c/i
    ABC
 0: ABC
 1: AB

/((a)(b)c)(d)/i
    ABCD
 0: ABCD
 1: ABC
 2: A
 3: B
 4: D

/[a-zA-Z_][a-zA-Z0-9_]*/i
    ALPHA
 0: ALPHA

/^a(bc+|b[eh])g|.h$/i
    ABH
 0: BH

/(bc+d$|ef*g.|h?i(j|k))/i
    EFFGZ
 0: EFFGZ
 1: EFFGZ
    IJ
 0: IJ
 1: IJ
 2: J
    REFFGZ
 0: EFFGZ
 1: EFFGZ
    *** Failers
No match
    ADCDCDE
No match
    EFFG
No match
    BCDD
No match

/((((((((((a))))))))))/i
    A
 0: A
 1: A
 2: A
 3: A
 4: A
 5: A
 6: A
 7: A
 8: A
 9: A
10: A

/((((((((((a))))))))))\9/i
    AA
 0: AA
 1: A
 2: A
 3: A
 4: A
 5: A
 6: A
 7: A
 8: A
 9: A
10: A

/(((((((((a)))))))))/i
    A
 0: A
 1: A
 2: A
 3: A
 4: A
 5: A
 6: A
 7: A
 8: A
 9: A

/multiple words of text/i
    *** Failers
No match
    AA
No match
    UH-UH
No match

/multiple words/i
    MULTIPLE WORDS, YEAH
 0: MULTIPLE WORDS

/(.*)c(.*)/i
    ABCDE
 0: ABCDE
 1: AB
 2: DE

/\((.*), (.*)\)/i
    (A, B)
 0: (A, B)
 1: A
 2: B

/abcd/i
    ABCD
 0: ABCD

/a(bc)d/i
    ABCD
 0: ABCD
 1: BC

/a[-]?c/i
    AC
 0: AC

/(abc)\1/i
    ABCABC
 0: ABCABC
 1: ABC

/([a-c]*)\1/i
    ABCABC
 0: ABCABC
 1: ABC

/((foo)|(bar))*/
    foobar
 0: foobar
 1: bar
 2: foo
 3: bar

/^(.+)?B/
    AB
 0: AB
 1: A

/^([^a-z])|(\^)$/
    .
 0: .
 1: .

/^[<>]&/
    <&OUT
 0: <&

/^(){3,5}/
    abc
 0: 
 1: 

/^(a+)*ax/
    aax
 0: aax
 1: a

/^((a|b)+)*ax/
    aax
 0: aax
 1: a
 2: a

/^((a|bc)+)*ax/
    aax
 0: aax
 1: a
 2: a

/(a|x)*ab/
    cab
 0: ab

/(a)*ab/
    cab
 0: ab

/(ab)[0-9]\1/i
    Ab4ab
 0: Ab4ab
 1: Ab
    ab4Ab
 0: ab4Ab
 1: ab

/foo\w*[0-9]{4}baz/
    foobar1234baz
 0: foobar1234baz

/(\w+:)+/
    one:
 0: one:
 1: one:

/((\w|:)+::)?(\w+)$/
    abcd
 0: abcd
 1: <unset>
 2: <unset>
 3: abcd
    xy:z:::abcd
 0: xy:z:::abcd
 1: xy:z:::
 2: :
 3: abcd

/^[^bcd]*(c+)/
    aexycd
 0: aexyc
 1: c

/(a*)b+/
    caab
 0: aab
 1: aa

/((\w|:)+::)?(\w+)$/
    abcd
 0: abcd
 1: <unset>
 2: <unset>
 3: abcd
    xy:z:::abcd
 0: xy:z:::abcd
 1: xy:z:::
 2: :
 3: abcd
    *** Failers
 0: Failers
 1: <unset>
 2: <unset>
 3: Failers
    abcd:
No match
    abcd:
No match

/^[^bcd]*(c+)/
    aexycd
 0: aexyc
 1: c

/((Z)+|A)*/
    ZABCDEFG
 0: ZA
 1: A
 2: Z

/(Z()|A)*/
    ZABCDEFG
 0: ZA
 1: A
 2: 

/(Z(())|A)*/
    ZABCDEFG
 0: ZA
 1: A
 2: 
 3: 

/(.*)[0-9]+\1/
    abc123abc
 0: abc123abc
 1: abc
    abc123bc 
 0: bc123bc
 1: bc

/((.*))[0-9]+\1/
    abc123abc
 0: abc123abc
 1: abc
 2: abc
    abc123bc  
 0: bc123bc
 1: bc
 2: bc

/^a{2,5}$/
    aa
 0: aa
    aaa
 0: aaa
    aaaa
 0: aaaa
    aaaaa
 0: aaaaa
    *** Failers
No match
    a
No match
    b
No match
    aaaaab
No match
    aaaaaa