testdata/testinput6

# This set of tests check the DFA matching functionality of pcre2_dfa_match(),
# excluding UTF and Unicode property support. All matches are done using DFA,
# forced by setting a default subject modifier at the start.
    
#forbid_utf
#subject dfa
#newline_default lf anycrlf any
     
/abc/
    abc
    
/ab*c/
    abc
    abbbbc
    ac
    
/ab+c/
    abc
    abbbbbbc
\= Expect no match 
    ac
    ab
    
/a*/no_auto_possess
    a
    aaaaaaaaaaaaaaaaa
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=ovector=10 
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\=dfa_shortest
    
/(a|abcd|african)/
    a
    abcd
    african
    
/^abc/
    abcdef
\= Expect no match
    xyzabc
    xyz\nabc    
    
/^abc/m
    abcdef
    xyz\nabc    
\= Expect no match
    xyzabc
    
/\Aabc/
    abcdef
\= Expect no match
    xyzabc
    xyz\nabc    
    
/\Aabc/m
    abcdef
\= Expect no match
    xyzabc
    xyz\nabc    
    
/\Gabc/
    abcdef
    xyzabc\=offset=3
\= Expect no match
    xyzabc    
    xyzabc\=offset=2
    
/x\dy\Dz/
    x9yzz
    x0y+z
\= Expect no match
    xyz
    xxy0z     
    
/x\sy\Sz/
    x yzz
    x y+z
\= Expect no match
    xyz
    xxyyz
    
/x\wy\Wz/
    xxy+z
\= Expect no match
    xxy0z
    x+y+z         
    
/x.y/
    x+y
    x-y
\= Expect no match
    x\ny
    
/x.y/s
    x+y
    x-y
    x\ny

/(a.b(?s)c.d|x.y)p.q/
    a+bc+dp+q
    a+bc\ndp+q
    x\nyp+q 
\= Expect no match 
    a\nbc\ndp+q
    a+bc\ndp\nq
    x\nyp\nq 

/a\d\z/
    ba0
\= Expect no match
    ba0\n
    ba0\ncd   

/a\d\z/m
    ba0
\= Expect no match
    ba0\n
    ba0\ncd   

/a\d\Z/
    ba0
    ba0\n
\= Expect no match
    ba0\ncd   

/a\d\Z/m
    ba0
    ba0\n
\= Expect no match
    ba0\ncd   

/a\d$/
    ba0
    ba0\n
\= Expect no match
    ba0\ncd   

/a\d$/m
    ba0
    ba0\n
    ba0\ncd   

/abc/i
    abc
    aBc
    ABC
    
/[^a]/
    abcd
    
/ab?\w/
    abz
    abbz
    azz  

/x{0,3}yz/
    ayzq
    axyzq
    axxyz
    axxxyzq
    axxxxyzq
\= Expect no match
    ax
    axx     
      
/x{3}yz/
    axxxyzq
    axxxxyzq
\= Expect no match
    ax
    axx     
    ayzq
    axyzq
    axxyz
      
/x{2,3}yz/
    axxyz
    axxxyzq
    axxxxyzq
\= Expect no match
    ax
    axx     
    ayzq
    axyzq
      
/[^a]+/no_auto_possess
    bac
    bcdefax
\= Expect no match
    aaaaa   

/[^a]*/no_auto_possess
    bac
    bcdefax
    aaaaa   
    
/[^a]{3,5}/no_auto_possess
    xyz
    awxyza
    abcdefa
    abcdefghijk
\= Expect no match
    axya
    axa
    aaaaa         

/\d*/
    1234b567
    xyz
    
/\D*/
    a1234b567
    xyz
     
/\d+/
    ab1234c56
\= Expect no match
    xyz
    
/\D+/
    ab123c56
\= Expect no match
    789
    
/\d?A/
    045ABC
    ABC
\= Expect no match
    XYZ
    
/\D?A/
    ABC
    BAC
    9ABC             

/a+/
    aaaa

/^.*xyz/
    xyz
    ggggggggxyz
    
/^.+xyz/
    abcdxyz
    axyz
\= Expect no match
    xyz
    
/^.?xyz/
    xyz
    cxyz       

/^\d{2,3}X/
    12X
    123X
\= Expect no match
    X
    1X
    1234X     

/^[abcd]\d/
    a45
    b93
    c99z
    d04
\= Expect no match
    e45
    abcd      
    abcd1234
    1234  

/^[abcd]*\d/
    a45
    b93
    c99z
    d04
    abcd1234
    1234  
\= Expect no match
    e45
    abcd      

/^[abcd]+\d/
    a45
    b93
    c99z
    d04
    abcd1234
\= Expect no match
    1234  
    e45
    abcd      

/^a+X/
    aX
    aaX 

/^[abcd]?\d/
    a45
    b93
    c99z
    d04
    1234  
\= Expect no match
    abcd1234
    e45

/^[abcd]{2,3}\d/
    ab45
    bcd93
\= Expect no match
    1234 
    a36 
    abcd1234
    ee45

/^(abc)*\d/
    abc45
    abcabcabc45
    42xyz 

/^(abc)+\d/
    abc45
    abcabcabc45
\= Expect no match
    42xyz 

/^(abc)?\d/
    abc45
    42xyz 
\= Expect no match
    abcabcabc45

/^(abc){2,3}\d/
    abcabc45
    abcabcabc45
\= Expect no match
    abcabcabcabc45
    abc45
    42xyz 

/1(abc|xyz)2(?1)3/
    1abc2abc3456
    1abc2xyz3456 

/^(a*\w|ab)=(a*\w|ab)/
    ab=ab

/^(a*\w|ab)=(?1)/
    ab=ab

/^([^()]|\((?1)*\))*$/
    abc
    a(b)c
    a(b(c))d  
\= Expect no match)
    a(b(c)d  

/^>abc>([^()]|\((?1)*\))*<xyz<$/
    >abc>123<xyz<
    >abc>1(2)3<xyz<
    >abc>(1(2)3)<xyz<

/^(?>a*)\d/
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa9876
\= Expect no match 
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

/< (?: (?(R) \d++  | [^<>]*+) | (?R)) * >/x
    <>
    <abcd>
    <abc <123> hij>
    <abc <def> hij>
    <abc<>def> 
    <abc<>      
\= Expect no match
    <abc

/^(?(?=abc)\w{3}:|\d\d)$/
    abc:                          
    12                             
\= Expect no match                     
    123                       
    xyz                        
                                
/^(?(?!abc)\d\d|\w{3}:)$/
    abc:                        
    12         
\= Expect no match
    123
    xyz    

/^(?=abc)\w{5}:$/
    abcde:                          
\= Expect no match                     
    abc.. 
    123                       
    vwxyz                        
                                
/^(?!abc)\d\d$/
    12         
\= Expect no match
    abcde:
    abc..  
    123
    vwxyz    

/(?<=abc|xy)123/
    abc12345
    wxy123z
\= Expect no match
    123abc

/(?<!abc|xy)123/
    123abc
    mno123456 
\= Expect no match
    abc12345
    wxy123z

/abc(?C1)xyz/
    abcxyz
    123abcxyz999 

/(ab|cd){3,4}/auto_callout
  ababab
  abcdabcd
  abcdcdcdcdcd  

/^abc/
    abcdef
\= Expect no match
    abcdef\=notbol

/^(a*|xyz)/
    bcd
    aaabcd
    xyz
    xyz\=notempty
\= Expect no match
    bcd\=notempty
    
/xyz$/
    xyz
    xyz\n
\= Expect no match
    xyz\=noteol
    xyz\n\=noteol
    
/xyz$/m
    xyz
    xyz\n 
    abcxyz\npqr 
    abcxyz\npqr\=noteol
    xyz\n\=noteol
\= Expect no match
    xyz\=noteol

/\Gabc/
    abcdef
    defabcxyz\=offset=3
\= Expect no match 
    defabcxyz

/^abcdef/
    ab\=ps
    abcde\=ps
    abcdef\=ps
\= Expect no match
    abx\=ps

/^a{2,4}\d+z/
    a\=ps
    aa\=ps
    aa2\=ps
    aaa\=ps
    aaa23\=ps
    aaaa12345\=ps
    aa0z\=ps
    aaaa4444444444444z\=ps
\= Expect no match
    az\=ps
    aaaaa\=ps
    a56\=ps

/^abcdef/
   abc\=ps
   def\=dfa_restart
   
/(?<=foo)bar/
   foob\=ps,offset=2,allusedtext
   foobar...\=ps,dfa_restart,offset=4
   foobar\=offset=2
\= Expect no match
   xyzfo\=ps
   obar\=dfa_restart

/(ab*(cd|ef))+X/
    lkjhlkjhlkjhlkjhabbbbbbcdaefabbbbbbbefa\=ps,notbol,noteol
    cdabbbbbbbb\=ps,notbol,dfa_restart,noteol
    efabbbbbbbbbbbbbbbb\=ps,notbol,dfa_restart,noteol
    bbbbbbbbbbbbcdXyasdfadf\=ps,notbol,dfa_restart,noteol
\= Expect no match
    adfadadaklhlkalkajhlkjahdfasdfasdfladsfjkj\=ps,noteol

/the quick brown fox/
    the quick brown fox
    What do you know about the quick brown fox?
\= Expect no match
    The quick brown FOX
    What do you know about THE QUICK BROWN FOX?

/The quick brown fox/i
    the quick brown fox
    The quick brown FOX
    What do you know about the quick brown fox?
    What do you know about THE QUICK BROWN FOX?

/abcd\t\n\r\f\a\e\071\x3b\$\\\?caxyz/
    abcd\t\n\r\f\a\e9;\$\\?caxyz

/a*abc?xyz+pqr{3}ab{2,}xy{4,5}pq{0,6}AB{0,}zz/
    abxyzpqrrrabbxyyyypqAzz
    abxyzpqrrrabbxyyyypqAzz
    aabxyzpqrrrabbxyyyypqAzz
    aaabxyzpqrrrabbxyyyypqAzz
    aaaabxyzpqrrrabbxyyyypqAzz
    abcxyzpqrrrabbxyyyypqAzz
    aabcxyzpqrrrabbxyyyypqAzz
    aaabcxyzpqrrrabbxyyyypAzz
    aaabcxyzpqrrrabbxyyyypqAzz
    aaabcxyzpqrrrabbxyyyypqqAzz
    aaabcxyzpqrrrabbxyyyypqqqAzz
    aaabcxyzpqrrrabbxyyyypqqqqAzz
    aaabcxyzpqrrrabbxyyyypqqqqqAzz
    aaabcxyzpqrrrabbxyyyypqqqqqqAzz
    aaaabcxyzpqrrrabbxyyyypqAzz
    abxyzzpqrrrabbxyyyypqAzz
    aabxyzzzpqrrrabbxyyyypqAzz
    aaabxyzzzzpqrrrabbxyyyypqAzz
    aaaabxyzzzzpqrrrabbxyyyypqAzz
    abcxyzzpqrrrabbxyyyypqAzz
    aabcxyzzzpqrrrabbxyyyypqAzz
    aaabcxyzzzzpqrrrabbxyyyypqAzz
    aaaabcxyzzzzpqrrrabbxyyyypqAzz
    aaaabcxyzzzzpqrrrabbbxyyyypqAzz
    aaaabcxyzzzzpqrrrabbbxyyyyypqAzz
    aaabcxyzpqrrrabbxyyyypABzz
    aaabcxyzpqrrrabbxyyyypABBzz
    >>>aaabxyzpqrrrabbxyyyypqAzz
    >aaaabxyzpqrrrabbxyyyypqAzz
    >>>>abcxyzpqrrrabbxyyyypqAzz
\= Expect no match
    abxyzpqrrabbxyyyypqAzz
    abxyzpqrrrrabbxyyyypqAzz
    abxyzpqrrrabxyyyypqAzz
    aaaabcxyzzzzpqrrrabbbxyyyyyypqAzz
    aaaabcxyzzzzpqrrrabbbxyyypqAzz
    aaabcxyzpqrrrabbxyyyypqqqqqqqAzz

/^(abc){1,2}zz/
    abczz
    abcabczz
\= Expect no match
    zz
    abcabcabczz
    >>abczz

/^(b+?|a){1,2}?c/
    bc
    bbc
    bbbc
    bac
    bbac
    aac
    abbbbbbbbbbbc
    bbbbbbbbbbbac
\= Expect no match
    aaac
    abbbbbbbbbbbac

/^(b+|a){1,2}c/
    bc
    bbc
    bbbc
    bac
    bbac
    aac
    abbbbbbbbbbbc
    bbbbbbbbbbbac
\= Expect no match
    aaac
    abbbbbbbbbbbac

/^(b+|a){1,2}?bc/
    bbc

/^(b*|ba){1,2}?bc/
    babc
    bbabc
    bababc
\= Expect no match
    bababbc
    babababc

/^(ba|b*){1,2}?bc/
    babc
    bbabc
    bababc
\= Expect no match
    bababbc
    babababc

/^\ca\cA\c[\c{\c:/
    \x01\x01\e;z

/^[ab\]cde]/
    athing
    bthing
    ]thing
    cthing
    dthing
    ething
\= Expect no match
    fthing
    [thing
    \\thing

/^[]cde]/
    ]thing
    cthing
    dthing
    ething
\= Expect no match
    athing
    fthing

/^[^ab\]cde]/
    fthing
    [thing
    \\thing
\= Expect no match
    athing
    bthing
    ]thing
    cthing
    dthing
    ething

/^[^]cde]/
    athing
    fthing
\= Expect no match
    ]thing
    cthing
    dthing
    ething

/^\/
    

/^ÿ/
    ÿ

/^[0-9]+$/
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    100
\= Expect no match
    abc

/^.*nter/
    enter
    inter
    uponter

/^xxx[0-9]+$/
    xxx0
    xxx1234
\= Expect no match
    xxx

/^.+[0-9][0-9][0-9]$/
    x123
    xx123
    123456
    x1234
\= Expect no match
    123

/^.+?[0-9][0-9][0-9]$/
    x123
    xx123
    123456
    x1234
\= Expect no match
    123

/^([^!]+)!(.+)=apquxz\.ixr\.zzz\.ac\.uk$/
    abc!pqr=apquxz.ixr.zzz.ac.uk
\= Expect no match
    !pqr=apquxz.ixr.zzz.ac.uk
    abc!=apquxz.ixr.zzz.ac.uk
    abc!pqr=apquxz:ixr.zzz.ac.uk
    abc!pqr=apquxz.ixr.zzz.ac.ukk

/:/
    Well, we need a colon: somewhere
\= Expect no match
    No match without a colon

/([\da-f:]+)$/i
    0abc
    abc
    fed
    E
    ::
    5f03:12C0::932e
    fed def
    Any old stuff
\= Expect no match
    0zzz
    gzzz
    fed\x20
    Any old rubbish

/^.*\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/
    .1.2.3
    A.12.123.0
\= Expect no match
    .1.2.3333
    1.2.3
    1234.2.3

/^(\d+)\s+IN\s+SOA\s+(\S+)\s+(\S+)\s*\(\s*$/
    1 IN SOA non-sp1 non-sp2(
    1    IN    SOA    non-sp1    non-sp2   (
\= Expect no match
    1IN SOA non-sp1 non-sp2(

/^[a-zA-Z\d][a-zA-Z\d\-]*(\.[a-zA-Z\d][a-zA-z\d\-]*)*\.$/
    a.
    Z.
    2.
    ab-c.pq-r.
    sxk.zzz.ac.uk.
    x-.y-.
\= Expect no match
    -abc.peq.

/^\*\.[a-z]([a-z\-\d]*[a-z\d]+)?(\.[a-z]([a-z\-\d]*[a-z\d]+)?)*$/
    *.a
    *.b0-a
    *.c3-b.c
    *.c-a.b-c
\= Expect no match
    *.0
    *.a-
    *.a-b.c-
    *.c-a.0-c

/^(?=ab(de))(abd)(e)/
    abde

/^(?!(ab)de|x)(abd)(f)/
    abdf

/^(?=(ab(cd)))(ab)/
    abcd

/^[\da-f](\.[\da-f])*$/i
    a.b.c.d
    A.B.C.D
    a.b.c.1.2.3.C

/^\".*\"\s*(;.*)?$/
    \"1234\"
    \"abcd\" ;
    \"\" ; rhubarb
\= Expect no match
    \"1234\" : things

/^$/
    \

/   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/x
    ab c
\= Expect no match
    abc
    ab cde

/(?x)   ^    a   (?# begins with a)  b\sc (?# then b c) $ (?# then end)/
    ab c
\= Expect no match
    abc
    ab cde

/^   a\ b[c ]d       $/x
    a bcd
    a b d
\= Expect no match
    abcd
    ab d

/^(a(b(c)))(d(e(f)))(h(i(j)))(k(l(m)))$/
    abcdefhijklm

/^(?:a(b(c)))(?:d(e(f)))(?:h(i(j)))(?:k(l(m)))$/
    abcdefhijklm

/^[\w][\W][\s][\S][\d][\D][\b][\n][\c]][\022]/
    a+ Z0+\x08\n\x1d\x12

/^[.^$|()*+?{,}]+/
    .^\$(*+)|{?,?}

/^a*\w/
    z
    az
    aaaz
    a
    aa
    aaaa
    a+
    aa+

/^a*?\w/
    z
    az
    aaaz
    a
    aa
    aaaa
    a+
    aa+

/^a+\w/
    az
    aaaz
    aa
    aaaa
    aa+

/^a+?\w/
    az
    aaaz
    aa
    aaaa
    aa+

/^\d{8}\w{2,}/
    1234567890
    12345678ab
    12345678__
\= Expect no match
    1234567

/^[aeiou\d]{4,5}$/
    uoie
    1234
    12345
    aaaaa
\= Expect no match
    123456

/^[aeiou\d]{4,5}?/
    uoie
    1234
    12345
    aaaaa
    123456

/^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

/^From\s+\S+\s+([a-zA-Z]{3}\s+){2}\d{1,2}\s+\d\d:\d\d/
    From abcd  Mon Sep 01 12:33:02 1997
    From abcd  Mon Sep  1 12:33:02 1997
\= Expect no match
    From abcd  Sep 01 12:33:02 1997

/^12.34/s
    12\n34
    12\r34

/\w+(?=\t)/
    the quick brown\t fox

/foo(?!bar)(.*)/
    foobar is foolish see?

/(?:(?!foo)...|^.{0,2})bar(.*)/
    foobar crowbar etc
    barrel
    2barrel
    A barrel

/^(\D*)(?=\d)(?!123)/
    abc456
\= Expect no match
    abc123

/^1234(?# test newlines
  inside)/
    1234

/^1234 #comment in extended re
  /x
    1234

/#rhubarb
  abcd/x
    abcd

/^abcd#rhubarb/x
    abcd

/(?!^)abc/
    the abc
\= Expect no match
    abc

/(?=^)abc/
    abc
\= Expect no match
    the abc

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

/^[ab]{1,3}?(ab*|b)/no_auto_possess
    aabbbbb

/^[ab]{1,3}?(ab*?|b)/no_auto_possess
    aabbbbb

/^[ab]{1,3}(ab*?|b)/no_auto_possess
    aabbbbb

/  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*                          # optional leading comment
(?:    (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
)                    # initial word
(?:  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
)  )* # further okay, if led by a period
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  @  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*    (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                           # initial subdomain
(?:                                  #
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.                        # if led by a period...
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                     #   ...further okay
)*
# address
|                     #  or
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
)             # one word, optionally followed by....
(?:
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037]  |  # atom and space parts, or...
\(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)       |  # comments, or...

" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
# quoted strings
)*
<  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*                     # leading <
(?:  @  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*    (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                           # initial subdomain
(?:                                  #
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.                        # if led by a period...
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                     #   ...further okay
)*

(?:  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  ,  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  @  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*    (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                           # initial subdomain
(?:                                  #
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.                        # if led by a period...
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                     #   ...further okay
)*
)* # further okay, if led by comma
:                                # closing colon
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  )? #       optional route
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
)                    # initial word
(?:  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
" (?:                      # opening quote...
[^\\\x80-\xff\n\015"]                #   Anything except backslash and quote
|                     #    or
\\ [^\x80-\xff]           #   Escaped something (something != CR)
)* "  # closing quote
)  )* # further okay, if led by a period
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  @  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*    (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                           # initial subdomain
(?:                                  #
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  \.                        # if led by a period...
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*   (?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|   \[                         # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*    #    stuff
\]                        #           ]
)                     #   ...further okay
)*
#       address spec
(?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*  > #                  trailing >
# name and address
)  (?: [\040\t] |  \(
(?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  |  \( (?:  [^\\\x80-\xff\n\015()]  |  \\ [^\x80-\xff]  )* \)  )*
\)  )*                       # optional trailing comment
/x
    Alan Other <user\@dom.ain>
    <user\@dom.ain>
    user\@dom.ain
    \"A. Other\" <user.1234\@dom.ain> (a comment)
    A. Other <user.1234\@dom.ain> (a comment)
    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
    A missing angle <user\@some.where
\= Expect no match
    The quick brown fox

/[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional leading comment
(?:
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
|                       #  or
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
# Quoted string
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
|                       #  or
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
# Quoted string
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# additional words
)*
@
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
)*
# address
|                             #  or
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
|                       #  or
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
# Quoted string
)
# leading word
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *               # "normal" atoms and or spaces
(?:
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
|
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
) # "special" comment or quoted string
[^()<>@,;:".\\\[\]\x80-\xff\000-\010\012-\037] *            #  more "normal"
)*
<
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# <
(?:
@
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
)*
(?: ,
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
@
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
)*
)*  # additional domains
:
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
)?     #       optional route
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
|                       #  or
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
# Quoted string
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
# Atom
|                       #  or
"                                     # "
[^\\\x80-\xff\n\015"] *                            #   normal
(?:  \\ [^\x80-\xff]  [^\\\x80-\xff\n\015"] * )*        #   ( special normal* )*
"                                     #        "
# Quoted string
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# additional words
)*
@
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
(?:
\.
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
(?:
[^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]+    # some number of atom characters...
(?![^(\040)<>@,;:".\\\[\]\000-\037\x80-\xff]) # ..not followed by something that could be part of an atom
|
\[                            # [
(?: [^\\\x80-\xff\n\015\[\]] |  \\ [^\x80-\xff]  )*     #    stuff
\]                           #           ]
)
[\040\t]*                    # Nab whitespace.
(?:
\(                              #  (
[^\\\x80-\xff\n\015()] *                             #     normal*
(?:                                 #       (
(?:  \\ [^\x80-\xff]  |
\(                            #  (
[^\\\x80-\xff\n\015()] *                            #     normal*
(?:  \\ [^\x80-\xff]   [^\\\x80-\xff\n\015()] * )*        #     (special normal*)*
\)                           #                       )
)    #         special
[^\\\x80-\xff\n\015()] *                         #         normal*
)*                                  #            )*
\)                             #                )
[\040\t]* )*    # If comment found, allow more spaces.
# optional trailing comments
)*
#       address spec
>                    #                 >
# name and address
)
/x
    Alan Other <user\@dom.ain>
    <user\@dom.ain>
    user\@dom.ain
    \"A. Other\" <user.1234\@dom.ain> (a comment)
    A. Other <user.1234\@dom.ain> (a comment)
    \"/s=user/ou=host/o=place/prmd=uu.yy/admd= /c=gb/\"\@x400-re.lay
    A missing angle <user\@some.where
\= Expect no match
    The quick brown fox

/abc\0def\00pqr\000xyz\0000AB/
    abc\0def\00pqr\000xyz\0000AB
    abc456 abc\0def\00pqr\000xyz\0000ABCDE

/abc\x0def\x00pqr\x000xyz\x0000AB/
    abc\x0def\x00pqr\x000xyz\x0000AB
    abc456 abc\x0def\x00pqr\x000xyz\x0000ABCDE

/^[\000-\037]/
    \0A
    \01B
    \037C

/\0*/
    \0\0\0\0

/A\x0{2,3}Z/
    The A\x0\x0Z
    An A\0\x0\0Z
\= Expect no match
    A\0Z
    A\0\x0\0\x0Z

/^\s/
    \040abc
    \x0cabc
    \nabc
    \rabc
    \tabc
\= Expect no match
    abc

/^a	b
      c/x
    abc

/ab{1,3}bc/
    abbbbc
    abbbc
    abbc
\= Expect no match
    abc
    abbbbbc

/([^.]*)\.([^:]*):[T ]+(.*)/
    track1.title:TBlah blah blah

/([^.]*)\.([^:]*):[T ]+(.*)/i
    track1.title:TBlah blah blah

/([^.]*)\.([^:]*):[t ]+(.*)/i
    track1.title:TBlah blah blah

/^[W-c]+$/
    WXY_^abc
\= Expect no match
    wxy

/^[W-c]+$/i
    WXY_^abc
    wxy_^ABC

/^[\x3f-\x5F]+$/i
    WXY_^abc
    wxy_^ABC

/^abc$/m
    abc
    qqq\nabc
    abc\nzzz
    qqq\nabc\nzzz

/^abc$/
    abc
\= Expect no match
    qqq\nabc
    abc\nzzz
    qqq\nabc\nzzz

/\Aabc\Z/m
    abc
    abc\n 
\= Expect no match
    qqq\nabc
    abc\nzzz
    qqq\nabc\nzzz
    
/\A(.)*\Z/s
    abc\ndef

/\A(.)*\Z/m
\= Expect no match
    abc\ndef

/(?:b)|(?::+)/
    b::c
    c::b

/[-az]+/
    az-
\= Expect no match
    b

/[az-]+/
    za-
\= Expect no match
    b

/[a\-z]+/
    a-z
\= Expect no match
    b

/[a-z]+/
    abcdxyz

/[\d-]+/
    12-34
\= Expect no match
    aaa

/\x5c/
    \\

/\x20Z/
    the Zoo
\= Expect no match
    Zulu

/ab{3cd/
    ab{3cd

/ab{3,cd/
    ab{3,cd

/ab{3,4a}cd/
    ab{3,4a}cd

/{4,5a}bc/
    {4,5a}bc

/^a.b/newline=lf
    a\rb
\= Expect no match
    a\nb

/abc$/
    abc
    abc\n
\= Expect no match
    abc\ndef

/(abc)\123/
    abc\x53

/(abc)\223/
    abc\x93

/(abc)\323/
    abc\xd3

/(abc)\100/
    abc\x40
    abc\100

/(abc)\1000/
    abc\x400
    abc\x40\x30
    abc\1000
    abc\100\x30
    abc\100\060
    abc\100\60

/(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)\12\123/
    abcdefghijk\12S

/a{0}bc/
    bc

/(a|(bc)){0,0}?xyz/
    xyz

/abc[\10]de/
    abc\010de

/abc[\1]de/
    abc\1de

/(abc)[\1]de/
    abc\1de

/(?s)a.b/
    a\nb

/^([^a])([^\b])([^c]*)([^d]{3,4})/
    baNOTccccd
    baNOTcccd
    baNOTccd
    bacccd
\= Expect no match
    anything
    b\bc   
    baccd

/[^a]/
    Abc
  
/[^a]/i
    Abc 

/[^a]+/
    AAAaAbc
  
/[^a]+/i
    AAAaAbc 

/[^a]+/
    bbb\nccc
   
/[^k]$/
    abc
\= Expect no match
    abk   
   
/[^k]{2,3}$/
    abc
    kbc
    kabc 
\= Expect no match
    abk
    akb
    akk 

/^\d{8,}\@.+[^k]$/
    12345678\@a.b.c.d
    123456789\@x.y.z
\= Expect no match
    12345678\@x.y.uk
    1234567\@a.b.c.d       

/[^a]/
    aaaabcd
    aaAabcd 

/[^a]/i
    aaaabcd
    aaAabcd 

/[^az]/
    aaaabcd
    aaAabcd 

/[^az]/i
    aaaabcd
    aaAabcd 

/\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377/
 \000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\042\043\044\045\046\047\050\051\052\053\054\055\056\057\060\061\062\063\064\065\066\067\070\071\072\073\074\075\076\077\100\101\102\103\104\105\106\107\110\111\112\113\114\115\116\117\120\121\122\123\124\125\126\127\130\131\132\133\134\135\136\137\140\141\142\143\144\145\146\147\150\151\152\153\154\155\156\157\160\161\162\163\164\165\166\167\170\171\172\173\174\175\176\177\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237\240\241\242\243\244\245\246\247\250\251\252\253\254\255\256\257\260\261\262\263\264\265\266\267\270\271\272\273\274\275\276\277\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357\360\361\362\363\364\365\366\367\370\371\372\373\374\375\376\377

/P[^*]TAIRE[^*]{1,6}?LL/
    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx

/P[^*]TAIRE[^*]{1,}?LL/
    xxxxxxxxxxxPSTAIREISLLxxxxxxxxx

/(\.\d\d[1-9]?)\d+/
    1.230003938
    1.875000282   
    1.235  
                  
/(\.\d\d((?=0)|\d(?=\d)))/
    1.230003938      
    1.875000282
\= Expect no match 
    1.235 
    
/a(?)b/
    ab 
 
/\b(foo)\s+(\w+)/i
    Food is on the foo table
    
/foo(.*)bar/
    The food is under the bar in the barn.
    
/foo(.*?)bar/
    The food is under the bar in the barn.

/(.*)(\d*)/no_auto_possess
    I have 2 numbers: 53147
    
/(.*)(\d+)/
    I have 2 numbers: 53147
 
/(.*?)(\d*)/no_auto_possess
    I have 2 numbers: 53147

/(.*?)(\d+)/
    I have 2 numbers: 53147

/(.*)(\d+)$/
    I have 2 numbers: 53147

/(.*?)(\d+)$/
    I have 2 numbers: 53147

/(.*)\b(\d+)$/
    I have 2 numbers: 53147

/(.*\D)(\d+)$/
    I have 2 numbers: 53147

/^\D*(?!123)/
    ABC123
     
/^(\D*)(?=\d)(?!123)/
    ABC445
\= Expect no match
    ABC123
    
/^[W-]46]/
    W46]789 
    -46]789
\= Expect no match
    Wall
    Zebra
    42
    [abcd] 
    ]abcd[
       
/^[W-\]46]/
    W46]789 
    Wall
    Zebra
    Xylophone  
    42
    [abcd] 
    ]abcd[
    \\backslash 
\= Expect no match
    -46]789
    well
    
/\d\d\/\d\d\/\d\d\d\d/
    01/01/2000

/word (?:[a-zA-Z0-9]+ ){0,10}otherword/
  word cat dog elephant mussel cow horse canary baboon snake shark otherword
\= Expect no match
  word cat dog elephant mussel cow horse canary baboon snake shark

/word (?:[a-zA-Z0-9]+ ){0,300}otherword/
\= Expect no match
  word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope

/^(a){0,0}/
    bcd
    abc
    aab     

/^(a){0,1}/
    bcd
    abc
    aab  

/^(a){0,2}/
    bcd
    abc
    aab  

/^(a){0,3}/
    bcd
    abc
    aab
    aaa   

/^(a){0,}/
    bcd
    abc
    aab
    aaa
    aaaaaaaa    

/^(a){1,1}/
    abc
    aab  
\= Expect no match
    bcd

/^(a){1,2}/
    abc
    aab  
\= Expect no match
    bcd

/^(a){1,3}/
    abc
    aab
    aaa   
\= Expect no match
    bcd

/^(a){1,}/
    abc
    aab
    aaa
    aaaaaaaa    
\= Expect no match
    bcd

/.*\.gif/
    borfle\nbib.gif\nno

/.{0,}\.gif/
    borfle\nbib.gif\nno

/.*\.gif/m
    borfle\nbib.gif\nno

/.*\.gif/s
    borfle\nbib.gif\nno

/.*\.gif/ms
    borfle\nbib.gif\nno
    
/.*$/
    borfle\nbib.gif\nno

/.*$/m
    borfle\nbib.gif\nno

/.*$/s
    borfle\nbib.gif\nno

/.*$/ms
    borfle\nbib.gif\nno
    
/.*$/
    borfle\nbib.gif\nno\n

/.*$/m
    borfle\nbib.gif\nno\n

/.*$/s
    borfle\nbib.gif\nno\n

/.*$/ms
    borfle\nbib.gif\nno\n
    
/(.*X|^B)/
    abcde\n1234Xyz
    BarFoo 
\= Expect no match
    abcde\nBar  

/(.*X|^B)/m
    abcde\n1234Xyz
    BarFoo 
    abcde\nBar  

/(.*X|^B)/s
    abcde\n1234Xyz
    BarFoo 
\= Expect no match
    abcde\nBar  

/(.*X|^B)/ms
    abcde\n1234Xyz
    BarFoo 
    abcde\nBar  

/(?s)(.*X|^B)/
    abcde\n1234Xyz
    BarFoo 
\= Expect no match 
    abcde\nBar  

/(?s:.*X|^B)/
    abcde\n1234Xyz
    BarFoo 
\= Expect no match 
    abcde\nBar  

/^.*B/
\= Expect no match
    abc\nB
     
/(?s)^.*B/
    abc\nB

/(?m)^.*B/
    abc\nB
     
/(?ms)^.*B/
    abc\nB

/(?ms)^B/
    abc\nB

/(?s)B$/
    B\n

/^[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
  
/^\d\d\d\d\d\d\d\d\d\d\d\d/
    123456654321 

/^[\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d][\d]/
    123456654321
  
/^[abc]{12}/
    abcabcabcabc
    
/^[a-c]{12}/
    abcabcabcabc
    
/^(a|b|c){12}/
    abcabcabcabc 

/^[abcdefghijklmnopqrstuvwxy0123456789]/
    n
\= Expect no match 
    z 

/abcde{0,0}/
    abcd
\= Expect no match
    abce  

/ab[cd]{0,0}e/
    abe
\= Expect no match
    abcde 
    
/ab(c){0,0}d/
    abd
\= Expect no match
    abcd   

/a(b*)/
    a
    ab
    abbbb
\= Expect no match
    bbbbb    
    
/ab\d{0}e/
    abe
\= Expect no match
    ab1e   
    
/"([^\\"]+|\\.)*"/
    the \"quick\" brown fox
    \"the \\\"quick\\\" brown fox\" 

/.*?/g,aftertext
    abc
  
/\b/g,aftertext
    abc 

/\b/g,aftertext
    abc 

//g
    abc

/<tr([\w\W\s\d][^<>]{0,})><TD([\w\W\s\d][^<>]{0,})>([\d]{0,}\.)(.*)((<BR>([\w\W\s\d][^<>]{0,})|[\s]{0,}))<\/a><\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><TD([\w\W\s\d][^<>]{0,})>([\w\W\s\d][^<>]{0,})<\/TD><\/TR>/is
  <TR BGCOLOR='#DBE9E9'><TD align=left valign=top>43.<a href='joblist.cfm?JobID=94 6735&Keyword='>Word Processor<BR>(N-1286)</a></TD><TD align=left valign=top>Lega lstaff.com</TD><TD align=left valign=top>CA - Statewide</TD></TR>

/a[^a]b/
    acb
    a\nb
    
/a.b/
    acb
\= Expect no match 
    a\nb   
    
/a[^a]b/s
    acb
    a\nb  
    
/a.b/s
    acb
    a\nb  

/^(b+?|a){1,2}?c/
    bac
    bbac
    bbbac
    bbbbac
    bbbbbac 

/^(b+|a){1,2}?c/
    bac
    bbac
    bbbac
    bbbbac
    bbbbbac 
    
/(?!\A)x/m
    a\bx\n  
\= Expect no match
    x\nb\n
    
/\x0{ab}/
    \0{ab} 

/(A|B)*?CD/
    CD 
    
/(A|B)*CD/
    CD 

/(?<!bar)foo/
    foo
    catfood
    arfootle
    rfoosh
\= Expect no match
    barfoo
    towbarfoo

/\w{3}(?<!bar)foo/
    catfood
\= Expect no match
    foo
    barfoo
    towbarfoo

/(?<=(foo)a)bar/
    fooabar
\= Expect no match
    bar
    foobbar
      
/\Aabc\z/m
    abc
\= Expect no match
    abc\n   
    qqq\nabc
    abc\nzzz
    qqq\nabc\nzzz

"(?>.*/)foo"
\= Expect no match
    /this/is/a/very/long/line/in/deed/with/very/many/slashes/in/it/you/see/

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

/(?>(\.\d\d[1-9]?))\d+/
    1.230003938
    1.875000282
\= Expect no match 
    1.235 

/^((?>\w+)|(?>\s+))*$/
    now is the time for all good men to come to the aid of the party
\= Expect no match
    this is not a line with only words and spaces!
    
/(\d+)(\w)/
    12345a
    12345+ 

/((?>\d+))(\w)/
    12345a
\= Expect no match
    12345+ 

/(?>a+)b/
    aaab

/((?>a+)b)/
    aaab

/(?>(a+))b/
    aaab

/(?>b)+/
    aaabbbccc

/(?>a+|b+|c+)*c/
    aaabbbbccccd
    
/(a+|b+|c+)*c/
    aaabbbbccccd

/((?>[^()]+)|\([^()]*\))+/
    ((abc(ade)ufh()()x
    
/\(((?>[^()]+)|\([^()]+\))+\)/
    (abc)
    (abc(def)xyz)
\= Expect no match
    ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa   

/a(?-i)b/i
    ab
    Ab
\= Expect no match 
    aB
    AB
        
/(a (?x)b c)d e/
    a bcd e
\= Expect no match
    a b cd e
    abcd e   
    a bcde 
 
/(a b(?x)c d (?-x)e f)/
    a bcde f
\= Expect no match
    abcdef  

/(a(?i)b)c/
    abc
    aBc
\= Expect no match
    abC
    aBC  
    Abc
    ABc
    ABC
    AbC
    
/a(?i:b)c/
    abc
    aBc
\= Expect no match 
    ABC
    abC
    aBC
    
/a(?i:b)*c/
    aBc
    aBBc
\= Expect no match 
    aBC
    aBBC
    
/a(?=b(?i)c)\w\wd/
    abcd
    abCd
\= Expect no match
    aBCd
    abcD     
    
/(?s-i:more.*than).*million/i
    more than million
    more than MILLION
    more \n than Million 
\= Expect no match
    MORE THAN MILLION    
    more \n than \n million 

/(?:(?s-i)more.*than).*million/i
    more than million
    more than MILLION
    more \n than Million 
\= Expect no match
    MORE THAN MILLION    
    more \n than \n million 
    
/(?>a(?i)b+)+c/
    abc
    aBbc
    aBBc 
\= Expect no match
    Abc
    abAb    
    abbC 
    
/(?=a(?i)b)\w\wc/
    abc
    aBc
\= Expect no match
    Ab 
    abC
    aBC     
    
/(?<=a(?i)b)(\w\w)c/
    abxxc
    aBxxc
\= Expect no match
    Abxxc
    ABxxc
    abxxC      

/^(?(?=abc)\w{3}:|\d\d)$/
    abc:
    12
\= Expect no match
    123
    xyz    

/^(?(?!abc)\d\d|\w{3}:)$/
    abc:
    12
\= Expect no match
    123
    xyz    
    
/(?(?<=foo)bar|cat)/
    foobar
    cat
    fcat
    focat   
\= Expect no match
    foocat  

/(?(?<!foo)cat|bar)/
    foobar
    cat
    fcat
    focat   
\= Expect no match
    foocat  

/(?>a*)*/
    a
    aa
    aaaa
    
/(abc|)+/
    abc
    abcabc
    abcabcabc
    xyz      

/([a]*)*/
    a
    aaaaa 
 
/([ab]*)*/
    a
    b
    ababab
    aaaabcde
    bbbb    
 
/([^a]*)*/
    b
    bbbb
    aaa   
 
/([^ab]*)*/
    cccc
    abab  
 
/([a]*?)*/
    a
    aaaa 
 
/([ab]*?)*/
    a
    b
    abab
    baba   
 
/([^a]*?)*/
    b
    bbbb
    aaa   
 
/([^ab]*?)*/
    c
    cccc
    baba   
 
/(?>a*)*/
    a
    aaabcde 
 
/((?>a*))*/
    aaaaa
    aabbaa 
 
/((?>a*?))*/
    aaaaa
    aabbaa 

/(?(?=[^a-z]+[a-z])  \d{2}-[a-z]{3}-\d{2}  |  \d{2}-\d{2}-\d{2} ) /x
    12-sep-98
    12-09-98
\= Expect no match
    sep-12-98
        
/(?i:saturday|sunday)/
    saturday
    sunday
    Saturday
    Sunday
    SATURDAY
    SUNDAY
    SunDay
    
/(a(?i)bc|BB)x/
    abcx
    aBCx
    bbx
    BBx
\= Expect no match
    abcX
    aBCX
    bbX
    BBX               

/^([ab](?i)[cd]|[ef])/
    ac
    aC
    bD
    elephant
    Europe 
    frog
    France
\= Expect no match
    Africa     

/^(ab|a(?i)[b-c](?m-i)d|x(?i)y|z)/
    ab
    aBd
    xy
    xY
    zebra
    Zambesi
\= Expect no match
    aCD  
    XY  

/(?<=foo\n)^bar/m
    foo\nbar
\= Expect no match
    bar
    baz\nbar   

/(?<=(?<!foo)bar)baz/
    barbaz
    barbarbaz 
    koobarbaz 
\= Expect no match
    baz
    foobarbaz 

# The following tests are taken from the Perl 5.005 test suite; some of them
# are compatible with 5.004, but I'd rather not have to sort them out.

/abc/
    abc
    xabcy
    ababc
\= Expect no match
    xbc
    axc
    abx

/ab*c/
    abc

/ab*bc/
    abc
    abbc
    abbbbc

/.{1}/
    abbbbc

/.{3,4}/
    abbbbc

/ab{0,}bc/
    abbbbc

/ab+bc/
    abbc
\= Expect no match
    abc
    abq

/ab+bc/
    abbbbc

/ab{1,}bc/
    abbbbc

/ab{1,3}bc/
    abbbbc

/ab{3,4}bc/
    abbbbc

/ab{4,5}bc/
\= Expect no match
    abq
    abbbbc

/ab?bc/
    abbc
    abc

/ab{0,1}bc/
    abc

/ab?bc/

/ab?c/
    abc

/ab{0,1}c/
    abc

/^abc$/
    abc
\= Expect no match
    abbbbc
    abcc

/^abc/
    abcc

/^abc$/

/abc$/
    aabc
    aabc
\= Expect no match
    aabcd

/^/
    abc

/$/
    abc

/a.c/
    abc
    axc

/a.*c/
    axyzc

/a[bc]d/
    abd
\= Expect no match
    axyzd
    abc

/a[b-d]e/
    ace

/a[b-d]/
    aac

/a[-b]/
    a-

/a[b-]/
    a-

/a]/
    a]

/a[]]b/
    a]b

/a[^bc]d/
    aed
\= Expect no match
    abd
    abd

/a[^-b]c/
    adc

/a[^]b]c/
    adc
    a-c
\= Expect no match
    a]c

/\ba\b/
    a-
    -a
    -a-

/\by\b/
\= Expect no match
    xy
    yz
    xyz

/\Ba\B/
\= Expect no match
    a-
    -a
    -a-

/\By\b/
    xy

/\by\B/
    yz

/\By\B/
    xyz

/\w/
    a

/\W/
    -
\= Expect no match
    a

/a\sb/
    a b

/a\Sb/
    a-b
\= Expect no match
    a b

/\d/
    1

/\D/
    -
\= Expect no match
    1

/[\w]/
    a

/[\W]/
    -
\= Expect no match
    a

/a[\s]b/
    a b

/a[\S]b/
    a-b
\= Expect no match
    a b

/[\d]/
    1

/[\D]/
    -
\= Expect no match
    1

/ab|cd/
    abc
    abcd

/()ef/
    def

/$b/

/a\(b/
    a(b

/a\(*b/
    ab
    a((b

/a\\b/
    a\\b
\= Expect no match
    a\b

/((a))/
    abc

/(a)b(c)/
    abc

/a+b+c/
    aabbabc

/a{1,}b{1,}c/
    aabbabc

/a.+?c/
    abcabc

/(a+|b)*/
    ab

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

/(a+|b)+/
    ab

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

/(a+|b)?/
    ab

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

/[^ab]*/
    cde

/abc/
\= Expect no match
    b

/a*/

/([abc])*d/
    abbbcd

/([abc])*bcd/
    abcd

/a|b|c|d|e/
    e

/(a|b|c|d|e)f/
    ef

/abcd*efg/
    abcdefg

/ab*/
    xabyabbbz
    xayabbbz

/(ab|cd)e/
    abcde

/[abhgefdc]ij/
    hij

/^(ab|cd)e/

/(abc|)ef/
    abcdef

/(a|b)c*d/
    abcd

/(ab|ab*)bc/
    abc

/a([bc]*)c*/
    abc

/a([bc]*)(c*d)/
    abcd

/a([bc]+)(c*d)/
    abcd

/a([bc]*)(c+d)/
    abcd

/a[bcd]*dcdcde/
    adcdcde

/a[bcd]+dcdcde/
\= Expect no match
    abcde
    adcdcde

/(ab|a)b*c/
    abc

/((a)(b)c)(d)/
    abcd

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

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

/(bc+d$|ef*g.|h?i(j|k))/
    effgz
    ij
    reffgz
\= Expect no match
    effg
    bcdd

/((((((((((a))))))))))/
    a

/(((((((((a)))))))))/
    a

/multiple words of text/
\= Expect no match
    aa
    uh-uh

/multiple words/
    multiple words, yeah

/(.*)c(.*)/
    abcde

/\((.*), (.*)\)/
    (a, b)

/[k]/

/abcd/
    abcd

/a(bc)d/
    abcd

/a[-]?c/
    ac

/abc/i
    ABC
    XABCY
    ABABC
\= Expect no match
    aaxabxbaxbbx
    XBC
    AXC
    ABX

/ab*c/i
    ABC

/ab*bc/i
    ABC
    ABBC

/ab*?bc/i
    ABBBBC

/ab{0,}?bc/i
    ABBBBC

/ab+?bc/i
    ABBC

/ab+bc/i
\= Expect no match
    ABC
    ABQ

/ab{1,}bc/i

/ab+bc/i
    ABBBBC

/ab{1,}?bc/i
    ABBBBC

/ab{1,3}?bc/i
    ABBBBC

/ab{3,4}?bc/i
    ABBBBC

/ab{4,5}?bc/i
\= Expect no match
    ABQ
    ABBBBC

/ab??bc/i
    ABBC
    ABC

/ab{0,1}?bc/i
    ABC

/ab??bc/i

/ab??c/i
    ABC

/ab{0,1}?c/i
    ABC

/^abc$/i
    ABC
\= Expect no match
    ABBBBC
    ABCC

/^abc/i
    ABCC

/^abc$/i

/abc$/i
    AABC

/^/i
    ABC

/$/i
    ABC

/a.c/i
    ABC
    AXC

/a.*?c/i
    AXYZC

/a.*c/i
    AABC
\= Expect no match
    AXYZD

/a[bc]d/i
    ABD

/a[b-d]e/i
    ACE
\= Expect no match
    ABC
    ABD

/a[b-d]/i
    AAC

/a[-b]/i
    A-

/a[b-]/i
    A-

/a]/i
    A]

/a[]]b/i
    A]B

/a[^bc]d/i
    AED

/a[^-b]c/i
    ADC
\= Expect no match
    ABD
    A-C

/a[^]b]c/i
    ADC

/ab|cd/i
    ABC
    ABCD

/()ef/i
    DEF

/$b/i
\= Expect no match
    A]C
    B

/a\(b/i
    A(B

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

/a\\b/i
\= Expect no match
    A\=notbol

/((a))/i
    ABC

/(a)b(c)/i
    ABC

/a+b+c/i
    AABBABC

/a{1,}b{1,}c/i
    AABBABC

/a.+?c/i
    ABCABC

/a.*?c/i
    ABCABC

/a.{0,5}?c/i
    ABCABC

/(a+|b)*/i
    AB

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

/(a+|b)+/i
    AB

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

/(a+|b)?/i
    AB

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

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

/[^ab]*/i
    CDE

/abc/i

/a*/i

/([abc])*d/i
    ABBBCD

/([abc])*bcd/i
    ABCD

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

/(a|b|c|d|e)f/i
    EF

/abcd*efg/i
    ABCDEFG

/ab*/i
    XABYABBBZ
    XAYABBBZ

/(ab|cd)e/i
    ABCDE

/[abhgefdc]ij/i
    HIJ

/^(ab|cd)e/i
\= Expect no match
    ABCDE

/(abc|)ef/i
    ABCDEF

/(a|b)c*d/i
    ABCD

/(ab|ab*)bc/i
    ABC

/a([bc]*)c*/i
    ABC

/a([bc]*)(c*d)/i
    ABCD

/a([bc]+)(c*d)/i
    ABCD

/a([bc]*)(c+d)/i
    ABCD

/a[bcd]*dcdcde/i
    ADCDCDE

/a[bcd]+dcdcde/i

/(ab|a)b*c/i
    ABC

/((a)(b)c)(d)/i
    ABCD

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

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

/(bc+d$|ef*g.|h?i(j|k))/i
    EFFGZ
    IJ
    REFFGZ
\= Expect no match
    ADCDCDE
    EFFG
    BCDD

/((((((((((a))))))))))/i
    A

/(((((((((a)))))))))/i
    A

/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a))))))))))/i
    A

/(?:(?:(?:(?:(?:(?:(?:(?:(?:(a|b|c))))))))))/i
    C

/multiple words of text/i
\= Expect no match
    AA
    UH-UH

/multiple words/i
    MULTIPLE WORDS, YEAH

/(.*)c(.*)/i
    ABCDE

/\((.*), (.*)\)/i
    (A, B)

/[k]/i

/abcd/i
    ABCD

/a(bc)d/i
    ABCD

/a[-]?c/i
    AC

/a(?!b)./
    abad

/a(?=d)./
    abad

/a(?=c|d)./
    abad

/a(?:b|c|d)(.)/
    ace

/a(?:b|c|d)*(.)/
    ace

/a(?:b|c|d)+?(.)/
    ace
    acdbcdbe

/a(?:b|c|d)+(.)/
    acdbcdbe

/a(?:b|c|d){2}(.)/
    acdbcdbe

/a(?:b|c|d){4,5}(.)/
    acdbcdbe

/a(?:b|c|d){4,5}?(.)/
    acdbcdbe

/((foo)|(bar))*/
    foobar

/a(?:b|c|d){6,7}(.)/
    acdbcdbe

/a(?:b|c|d){6,7}?(.)/
    acdbcdbe

/a(?:b|c|d){5,6}(.)/
    acdbcdbe

/a(?:b|c|d){5,6}?(.)/
    acdbcdbe

/a(?:b|c|d){5,7}(.)/
    acdbcdbe

/a(?:b|c|d){5,7}?(.)/
    acdbcdbe

/a(?:b|(c|e){1,2}?|d)+?(.)/
    ace

/^(.+)?B/
    AB

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

/^[<>]&/
    <&OUT

/(?:(f)(o)(o)|(b)(a)(r))*/
    foobar

/(?<=a)b/
    ab
\= Expect no match
    cb
    b

/(?<!c)b/
    ab
    b
    b

/(?:..)*a/
    aba

/(?:..)*?a/
    aba

/^(){3,5}/
    abc

/^(a+)*ax/
    aax

/^((a|b)+)*ax/
    aax

/^((a|bc)+)*ax/
    aax

/(a|x)*ab/
    cab

/(a)*ab/
    cab

/(?:(?i)a)b/
    ab

/((?i)a)b/
    ab

/(?:(?i)a)b/
    Ab

/((?i)a)b/
    Ab

/(?:(?i)a)b/
\= Expect no match
    cb
    aB

/((?i)a)b/

/(?i:a)b/
    ab

/((?i:a))b/
    ab

/(?i:a)b/
    Ab

/((?i:a))b/
    Ab

/(?i:a)b/
\= Expect no match
    aB
    aB

/((?i:a))b/

/(?:(?-i)a)b/i
    ab

/((?-i)a)b/i
    ab

/(?:(?-i)a)b/i
    aB

/((?-i)a)b/i
    aB

/(?:(?-i)a)b/i
    aB
\= Expect no match
    Ab

/((?-i)a)b/i

/(?:(?-i)a)b/i
    aB

/((?-i)a)b/i
    aB

/(?:(?-i)a)b/i
\= Expect no match
    Ab
    AB

/((?-i)a)b/i

/(?-i:a)b/i
    ab

/((?-i:a))b/i
    ab

/(?-i:a)b/i
    aB

/((?-i:a))b/i
    aB

/(?-i:a)b/i
\= Expect no match
    AB
    Ab

/((?-i:a))b/i

/(?-i:a)b/i
    aB

/((?-i:a))b/i
    aB

/(?-i:a)b/i
\= Expect no match
    Ab
    AB

/((?-i:a))b/i

/((?-i:a.))b/i
\= Expect no match
    AB
    a\nB

/((?s-i:a.))b/i
    a\nB

/(?:c|d)(?:)(?:a(?:)(?:b)(?:b(?:))(?:b(?:)(?:b)))/
    cabbbb

/(?:c|d)(?:)(?:aaaaaaaa(?:)(?:bbbbbbbb)(?:bbbbbbbb(?:))(?:bbbbbbbb(?:)(?:bbbbbbbb)))/
    caaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

/foo\w*\d{4}baz/
    foobar1234baz

/x(~~)*(?:(?:F)?)?/
    x~~

/^a(?#xxx){3}c/
    aaac

/^a (?#xxx) (?#yyy) {3}c/x
    aaac

/(?<![cd])b/
\= Expect no match
    B\nB
    dbcb

/(?<![cd])[ab]/
    dbaacb

/(?<!(c|d))b/

/(?<!(c|d))[ab]/
    dbaacb

/(?<!cd)[ab]/
    cdaccb

/^(?:a?b?)*$/
\= Expect no match
    dbcb
    a--

/((?s)^a(.))((?m)^b$)/
    a\nb\nc\n

/((?m)^b$)/
    a\nb\nc\n

/(?m)^b/
    a\nb\n

/(?m)^(b)/
    a\nb\n

/((?m)^b)/
    a\nb\n

/\n((?m)^b)/
    a\nb\n

/((?s).)c(?!.)/
    a\nb\nc\n
    a\nb\nc\n

/((?s)b.)c(?!.)/
    a\nb\nc\n
    a\nb\nc\n

/^b/

/()^b/
\= Expect no match
    a\nb\nc\n
    a\nb\nc\n

/((?m)^b)/
    a\nb\nc\n

/(?(?!a)a|b)/

/(?(?!a)b|a)/
    a

/(?(?=a)b|a)/
\= Expect no match
    a
    a

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

/(\w+:)+/
    one:

/$(?<=^(a))/
    a

/([\w:]+::)?(\w+)$/
    abcd
    xy:z:::abcd

/^[^bcd]*(c+)/
    aexycd

/(a*)b+/
    caab

/([\w:]+::)?(\w+)$/
    abcd
    xy:z:::abcd
\= Expect no match
    abcd:
    abcd:

/^[^bcd]*(c+)/
    aexycd

/(>a+)ab/

/(?>a+)b/
    aaab

/([[:]+)/
    a:[b]:

/([[=]+)/
    a=[b]=

/([[.]+)/
    a.[b].

/((?>a+)b)/
    aaab

/(?>(a+))b/
    aaab

/((?>[^()]+)|\([^()]*\))+/
    ((abc(ade)ufh()()x

/a\Z/
\= Expect no match
    aaab
    a\nb\n

/b\Z/
    a\nb\n

/b\z/

/b\Z/
    a\nb

/b\z/
    a\nb
    
/(?>.*)(?<=(abcd|wxyz))/
    alphabetabcd
    endingwxyz
\= Expect no match
    a rather long string that doesn't end with one of them

/word (?>(?:(?!otherword)[a-zA-Z0-9]+ ){0,30})otherword/
    word cat dog elephant mussel cow horse canary baboon snake shark otherword
\= Expect no match
    word cat dog elephant mussel cow horse canary baboon snake shark
  
/word (?>[a-zA-Z0-9]+ ){0,30}otherword/
\= Expect no match
    word cat dog elephant mussel cow horse canary baboon snake shark the quick brown fox and the lazy dog and several other words getting close to thirty by now I hope

/(?<=\d{3}(?!999))foo/
    999foo
    123999foo 
\= Expect no match
    123abcfoo
    
/(?<=(?!...999)\d{3})foo/
    999foo
    123999foo 
\= Expect no match
    123abcfoo

/(?<=\d{3}(?!999)...)foo/
    123abcfoo
    123456foo 
\= Expect no match
    123999foo  
    
/(?<=\d{3}...)(?<!999)foo/
    123abcfoo   
    123456foo 
\= Expect no match
    123999foo  

/((Z)+|A)*/
    ZABCDEFG

/(Z()|A)*/
    ZABCDEFG

/(Z(())|A)*/
    ZABCDEFG

/((?>Z)+|A)*/
    ZABCDEFG

/((?>)+|A)*/
    ZABCDEFG

/a*/g
    abbab

/[[:space:]]+/
    > \x09\x0a\x0c\x0d\x0b<
     
/[[:blank:]]+/
    > \x09\x0a\x0c\x0d\x0b<
     
/[\s]+/
    > \x09\x0a\x0c\x0d\x0b<
     
/\s+/
    > \x09\x0a\x0c\x0d\x0b<
     
/ab/x
    ab

/(?!\A)x/m
  a\nxb\n

/(?!^)x/m
\= Expect no match
    a\nxb\n

/abc\Qabc\Eabc/
    abcabcabc
    
/abc\Q(*+|\Eabc/
    abc(*+|abc 

/   abc\Q abc\Eabc/x
    abc abcabc
\= Expect no match
    abcabcabc  
    
/abc#comment
    \Q#not comment
    literal\E/x
    abc#not comment\n    literal     

/abc#comment
    \Q#not comment
    literal/x
    abc#not comment\n    literal     

/abc#comment
    \Q#not comment
    literal\E #more comment
    /x
    abc#not comment\n    literal     

/abc#comment
    \Q#not comment
    literal\E #more comment/x
    abc#not comment\n    literal     

/\Qabc\$xyz\E/
    abc\\\$xyz

/\Qabc\E\$\Qxyz\E/
    abc\$xyz

/\Gabc/
    abc
\= Expect no match
    xyzabc  

/\Gabc./g
    abc1abc2xyzabc3

/abc./g
    abc1abc2xyzabc3 

/a(?x: b c )d/
    XabcdY
\= Expect no match 
    Xa b c d Y 

/((?x)x y z | a b c)/
    XabcY
    AxyzB 

/(?i)AB(?-i)C/
    XabCY
\= Expect no match
    XabcY  

/((?i)AB(?-i)C|D)E/
    abCE
    DE
\= Expect no match
    abcE
    abCe  
    dE
    De    

/[z\Qa-d]\E]/
    z
    a
    -
    d
    ] 
\= Expect no match
    b     

/(a+)*b/
\= Expect no match
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 
    
/(?i)reg(?:ul(?:[aä]|ae)r|ex)/
    REGular
    regulaer
    Regex  
    regulär 

/Åæåä[à-ÿÀ-ß]+/
    Åæåäà
    Åæåäÿ
    ÅæåäÀ
    Åæåäß

/(?<=Z)X./
    \x84XAZXB

/^(?(2)a|(1)(2))+$/
    123a

/(?<=a|bbbb)c/
    ac
    bbbbc

/line\nbreak/
    this is a line\nbreak
    line one\nthis is a line\nbreak in the second line 

/line\nbreak/firstline
    this is a line\nbreak
\= Expect no match 
    line one\nthis is a line\nbreak in the second line 

/line\nbreak/m,firstline
    this is a line\nbreak
\= Expect no match 
    line one\nthis is a line\nbreak in the second line 

/1234/
    123\=ps
\= Expect no match 
    a4\=ps,dfa_restart

/1234/
    123\=ps
    4\=ps,dfa_restart

/^/gm
    a\nb\nc\n
    \ 
    
/(?<=C\n)^/gm
    A\nC\nC\n 

/(?s)A?B/
    AB
    aB  

/(?s)A*B/
    AB
    aB  

/(?m)A?B/
    AB
    aB  

/(?m)A*B/
    AB
    aB  

/Content-Type\x3A[^\r\n]{6,}/
    Content-Type:xxxxxyyy 

/Content-Type\x3A[^\r\n]{6,}z/
    Content-Type:xxxxxyyyz

/Content-Type\x3A[^a]{6,}/
    Content-Type:xxxyyy 

/Content-Type\x3A[^a]{6,}z/
    Content-Type:xxxyyyz

/^abc/Im,newline=lf
    xyz\nabc
    xyz\r\nabc
\= Expect no match
    xyz\rabc
    xyzabc\r
    xyzabc\rpqr
    xyzabc\r\n
    xyzabc\r\npqr

/^abc/Im,newline=crlf
    xyz\r\nabclf>
\= Expect no match
    xyz\nabclf
    xyz\rabclf
    
/^abc/Im,newline=cr
    xyz\rabc
\= Expect no match
    xyz\nabc
    xyz\r\nabc

/.*/I,newline=lf
    abc\ndef
    abc\rdef
    abc\r\ndef

/.*/I,newline=cr
    abc\ndef
    abc\rdef
    abc\r\ndef

/.*/I,newline=crlf
    abc\ndef
    abc\rdef
    abc\r\ndef

/\w+(.)(.)?def/Is
    abc\ndef
    abc\rdef
    abc\r\ndef

/\w+(.)(.)?def/s
    abc\ndef
    abc\rdef
    abc\r\ndef

/^\w+=.*(\\\n.*)*/
    abc=xyz\\\npqr

/^(a()*)*/
    aaaa

/^(?:a(?:(?:))*)*/
    aaaa

/^(a()+)+/
    aaaa

/^(?:a(?:(?:))+)+/
    aaaa

/(a|)*\d/
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

/(?>a|)*\d/
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

/(?:a|)*\d/
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4
\= Expect no match
  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

/^a.b/newline=lf
    a\rb
\= Expect no match
    a\nb

/^a.b/newline=cr
    a\nb
\= Expect no match
    a\rb

/^a.b/newline=anycrlf
    a\x85b
\= Expect no match
    a\rb

/^a.b/newline=any
\= Expect no match
    a\nb
    a\rb
    a\x85b

/^abc./gmx,newline=any
    abc1 \x0aabc2 \x0babc3xx \x0cabc4 \x0dabc5xx \x0d\x0aabc6 \x85abc7 JUNK

/abc.$/gmx,newline=any
    abc1\x0a abc2\x0b abc3\x0c abc4\x0d abc5\x0d\x0a abc6\x85 abc9

/^a\Rb/bsr=unicode
    a\nb
    a\rb
    a\r\nb
    a\x0bb
    a\x0cb
    a\x85b   
\= Expect no match
    a\n\rb    

/^a\R*b/bsr=unicode
    ab
    a\nb
    a\rb
    a\r\nb
    a\x0bb
    a\x0cb
    a\x85b   
    a\n\rb    
    a\n\r\x85\x0cb 

/^a\R+b/bsr=unicode
    a\nb
    a\rb
    a\r\nb
    a\x0bb
    a\x0cb
    a\x85b   
    a\n\rb    
    a\n\r\x85\x0cb 
\= Expect no match
    ab  
    
/^a\R{1,3}b/bsr=unicode
    a\nb
    a\n\rb
    a\n\r\x85b
    a\r\n\r\nb 
    a\r\n\r\n\r\nb 
    a\n\r\n\rb
    a\n\n\r\nb 
\= Expect no match
    a\n\n\n\rb
    a\r

/.+foo/
    afoo
\= Expect no match 
    \r\nfoo 
    \nfoo 

/.+foo/newline=crlf
    afoo
    \nfoo 
\= Expect no match 
    \r\nfoo 

/.+foo/newline=any
    afoo
\= Expect no match 
    \nfoo 
    \r\nfoo 

/.+foo/s
    afoo
    \r\nfoo 
    \nfoo 

/^$/gm,newline=any
    abc\r\rxyz
    abc\n\rxyz  
\= Expect no match 
    abc\r\nxyz

/^X/m
    XABC
\= Expect no match 
    XABC\=notbol

/(?m)^$/g,newline=any,aftertext
    abc\r\n\r\n

/(?m)^$|^\r\n/g,newline=any,aftertext
    abc\r\n\r\n
    
/(?m)$/g,newline=any,aftertext
    abc\r\n\r\n

/(?|(abc)|(xyz))/
   >abc<
   >xyz< 

/(x)(?|(abc)|(xyz))(x)/
    xabcx
    xxyzx 

/(x)(?|(abc)(pqr)|(xyz))(x)/
    xabcpqrx
    xxyzx 

/(?|(abc)|(xyz))(?1)/
    abcabc
    xyzabc 
\= Expect no match 
    xyzxyz 
 
/\H\h\V\v/
    X X\x0a
    X\x09X\x0b
\= Expect no match
    \xa0 X\x0a   
    
/\H*\h+\V?\v{3,4}/
    \x09\x20\xa0X\x0a\x0b\x0c\x0d\x0a
    \x09\x20\xa0\x0a\x0b\x0c\x0d\x0a
    \x09\x20\xa0\x0a\x0b\x0c
\= Expect no match 
    \x09\x20\xa0\x0a\x0b
     
/\H{3,4}/
    XY  ABCDE
    XY  PQR ST 
    
/.\h{3,4}./
    XY  AB    PQRS

/\h*X\h?\H+Y\H?Z/
    >XNNNYZ
    >  X NYQZ
\= Expect no match
    >XYZ   
    >  X NY Z

/\v*X\v?Y\v+Z\V*\x0a\V+\x0b\V{2,3}\x0c/
    >XY\x0aZ\x0aA\x0bNN\x0c
    >\x0a\x0dX\x0aY\x0a\x0bZZZ\x0aAAA\x0bNNN\x0c

/.+A/newline=crlf
\= Expect no match
    \r\nA
    
/\nA/newline=crlf
    \r\nA 

/[\r\n]A/newline=crlf
    \r\nA 

/(\r|\n)A/newline=crlf
    \r\nA 

/a\Rb/I,bsr=anycrlf
    a\rb
    a\nb
    a\r\nb
\= Expect no match
    a\x85b
    a\x0bb     

/a\Rb/I,bsr=unicode
    a\rb
    a\nb
    a\r\nb
    a\x85b
    a\x0bb     
    
/a\R?b/I,bsr=anycrlf
    a\rb
    a\nb
    a\r\nb
\= Expect no match
    a\x85b
    a\x0bb     

/a\R?b/I,bsr=unicode
    a\rb
    a\nb
    a\r\nb
    a\x85b
    a\x0bb     
    
/a\R{2,4}b/I,bsr=anycrlf
    a\r\n\nb
    a\n\r\rb
    a\r\n\r\n\r\n\r\nb
\= Expect no match
    a\x0b\x0bb     
    a\x85\x85b

/a\R{2,4}b/I,bsr=unicode
    a\r\rb
    a\n\n\nb
    a\r\n\n\r\rb
    a\x85\x85b
    a\x0b\x0bb     
\= Expect no match 
    a\r\r\r\r\rb 
    
/a(?!)|\wbc/
    abc 

/a[]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
    ab

/a[]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
    ab 

/a[]*+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
\= Expect no match
    ab 

/a[^]b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
    aXb
    a\nb 
\= Expect no match
    ab  
    
/a[^]+b/alt_bsux,allow_empty_class,match_unset_backref,dupnames
    aXb
    a\nX\nXb 
\= Expect no match
    ab  

/X$/dollar_endonly
    X
\= Expect no match 
    X\n 

/X$/
    X
    X\n 

/xyz/auto_callout
  xyz 
  abcxyz 
\= Expect no match 
  abc
  abcxypqr  

/xyz/auto_callout,no_start_optimize
  abcxyz 
\= Expect no match 
  abc
  abcxypqr  

/(*NO_START_OPT)xyz/auto_callout
  abcxyz 
  
/(?C)ab/
  ab
  ab\=callout_none
  
/ab/auto_callout
  ab
  ab\=callout_none

/^"((?(?=[a])[^"])|b)*"$/auto_callout
    "ab"
    "ab"\=callout_none

/\d+X|9+Y/
    ++++123999\=ps
    ++++123999Y\=ps

/Z(*F)/
\= Expect no match 
    Z\=ps
    ZA\=ps
    
/Z(?!)/
\= Expect no match 
    Z\=ps
    ZA\=ps

/dog(sbody)?/
    dogs\=ps
    dogs\=ph
    
/dog(sbody)??/
    dogs\=ps
    dogs\=ph

/dog|dogsbody/
    dogs\=ps
    dogs\=ph
 
/dogsbody|dog/
    dogs\=ps
    dogs\=ph

/Z(*F)Q|ZXY/
    Z\=ps
\= Expect no match 
    ZA\=ps
    X\=ps

/\bthe cat\b/
    the cat\=ps
    the cat\=ph

/dog(sbody)?/
    dogs\=ps
    body\=dfa_restart

/dog(sbody)?/
    dogs\=ph
    body\=dfa_restart

/abc/
   abc\=ps
   abc\=ph

/abc\K123/
    xyzabc123pqr
    
/(?<=abc)123/allusedtext
    xyzabc123pqr 
    xyzabc12\=ps
    xyzabc12\=ph

/\babc\b/allusedtext
    +++abc+++
    +++ab\=ps
    +++ab\=ph

/(?=C)/g,aftertext
    ABCDECBA

/(abc|def|xyz)/I
    terhjk;abcdaadsfe
    the quick xyz brown fox 
\= Expect no match
    thejk;adlfj aenjl;fda asdfasd ehj;kjxyasiupd

/(abc|def|xyz)/I,no_start_optimize
    terhjk;abcdaadsfe
    the quick xyz brown fox
\= Expect no match
    thejk;adlfj aenjl;fda asdfasd ehj;kjxyasiupd

/abcd*/aftertext
    xxxxabcd\=ps
    xxxxabcd\=ph
    dddxxx\=dfa_restart
    xxxxabcd\=ph
    xxx\=dfa_restart

/abcd*/i
    xxxxabcd\=ps
    xxxxabcd\=ph
    XXXXABCD\=ps
    XXXXABCD\=ph

/abc\d*/
    xxxxabc1\=ps
    xxxxabc1\=ph

/abc[de]*/
    xxxxabcde\=ps
    xxxxabcde\=ph

/(?:(?1)|B)(A(*F)|C)/
    ABCD
    CCD
\= Expect no match
    CAD   

/^(?:(?1)|B)(A(*F)|C)/
    CCD
    BCD 
\= Expect no match
    ABCD
    CAD
    BAD    

/^(?!a(*SKIP)b)/
    ac
    
/^(?=a(*SKIP)b|ac)/
    ac
    
/^(?=a(*THEN)b|ac)/
    ac
    
/^(?=a(*PRUNE)b)/
    ab  

/^(?(?!a(*SKIP)b))/
    ac

/(?<=abc)def/allusedtext
    abc\=ph

/abc$/
    abc
    abc\=ps
    abc\=ph

/abc$/m
    abc
    abc\n
    abc\=ph
    abc\n\=ph
    abc\=ps
    abc\n\=ps

/abc\z/
    abc
    abc\=ps
    abc\=ph

/abc\Z/
    abc
    abc\=ps
    abc\=ph

/abc\b/
    abc
    abc\=ps
    abc\=ph

/abc\B/
    abc\=ps
    abc\=ph
\= Expect no match 
    abc

/.+/
    abc\=offset=0
    abc\=offset=1
    abc\=offset=2
\= Bad offsets
    abc\=offset=4
    abc\=offset=-4 
\= Expect no match 
    abc\=offset=3

/^(?:a)++\w/
     aaaab
\= Expect no match 
     aaaa 
     bbb 

/^(?:aa|(?:a)++\w)/
     aaaab
     aaaa 
\= Expect no match 
     bbb 

/^(?:a)*+\w/
     aaaab
     bbb 
\= Expect no match 
     aaaa 

/^(a)++\w/
     aaaab
\= Expect no match 
     aaaa 
     bbb 

/^(a|)++\w/
     aaaab
\= Expect no match 
     aaaa 
     bbb 

/(?=abc){3}abc/aftertext
    abcabcabc
\= Expect no match
    xyz  
    
/(?=abc)+abc/aftertext
    abcabcabc
\= Expect no match
    xyz  
    
/(?=abc)++abc/aftertext
    abcabcabc
\= Expect no match
    xyz  
    
/(?=abc){0}xyz/
    xyz 

/(?=abc){1}xyz/
\= Expect no match
    xyz 
    
/(?=(a))?./
    ab
    bc
      
/(?=(a))??./
    ab
    bc

/^(?=(a)){0}b(?1)/
    backgammon

/^(?=(?1))?[az]([abc])d/
    abd 
    zcdxx 

/^(?!a){0}\w+/
    aaaaa

/(?<=(abc))?xyz/
    abcxyz
    pqrxyz 

/((?2))((?1))/
    abc

/(?(R)a+|(?R)b)/
    aaaabcde

/(?(R)a+|((?R))b)/
    aaaabcde

/((?(R)a+|(?1)b))/
    aaaabcde

/((?(R2)a+|(?1)b))()/
    aaaabcde

/(?(R)a*(?1)|((?R))b)/
    aaaabcde

/(a+)/no_auto_possess
    aaaa\=ovector=3
    aaaa\=ovector=4

/^\R/
    \r\=ps
    \r\=ph
    
/^\R{2,3}x/
    \r\=ps
    \r\=ph
    \r\r\=ps
    \r\r\=ph
    \r\r\r\=ps
    \r\r\r\=ph
    \r\rx
    \r\r\rx    

/^\R{2,3}?x/
    \r\=ps
    \r\=ph
    \r\r\=ps
    \r\r\=ph
    \r\r\r\=ps
    \r\r\r\=ph
    \r\rx
    \r\r\rx    
    
/^\R?x/
    \r\=ps
    \r\=ph
    x
    \rx  

/^\R+x/
    \r\=ps
    \r\=ph
    \r\n\=ps
    \r\n\=ph
    \rx  

/^a$/newline=crlf
    a\r\=ps
    a\r\=ph

/^a$/m,newline=crlf
    a\r\=ps
    a\r\=ph

/^(a$|a\r)/newline=crlf
    a\r\=ps
    a\r\=ph

/^(a$|a\r)/m,newline=crlf
    a\r\=ps
    a\r\=ph

/./newline=crlf
    \r\=ps
    \r\=ph
  
/.{2,3}/newline=crlf
    \r\=ps
    \r\=ph
    \r\r\=ps
    \r\r\=ph
    \r\r\r\=ps
    \r\r\r\=ph

/.{2,3}?/newline=crlf
    \r\=ps
    \r\=ph
    \r\r\=ps
    \r\r\=ph
    \r\r\r\=ps
    \r\r\r\=ph

# Test simple validity check for restarts 

/abcdef/
   abc\=dfa_restart

/<H((?(?!<H|F>)(.)|(?R))++)*F>/
    text <H more text <H texting more  hexA0-"\xA0"    hex above 7F-"\xBC" F> text xxxxx <H text F> text F> text2 <H text sample F> more text.

/^(?>.{4})abc|^\w\w.xabcd/
    xxxxabcd
    xx\xa0xabcd 

/^(.{4}){2}+abc|^\w\w.x\w\w\w\wabcd/
    xxxxxxxxabcd
    xx\xa0xxxxxabcd 

/abcd/
    abcd\=ovector=0

# These tests show up auto-possessification 

/[ab]*/
    aaaa
    
/[ab]*?/
    aaaa
    
/[ab]?/
    aaaa
    
/[ab]??/
    aaaa
    
/[ab]+/
    aaaa
    
/[ab]+?/
    aaaa
    
/[ab]{2,3}/
    aaaa
    
/[ab]{2,3}?/
    aaaa
    
/[ab]{2,}/
    aaaa    

/[ab]{2,}?/
    aaaa    

'\A(?:[^\"]++|\"(?:[^\"]*+|\"\")*+\")++'
    NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED

'\A(?:[^\"]++|\"(?:[^\"]++|\"\")*+\")++'
    NON QUOTED \"QUOT\"\"ED\" AFTER \"NOT MATCHED

/abc(?=xyz)/allusedtext
    abcxyzpqr
    abcxyzpqr\=aftertext
    
/(?<=pqr)abc(?=xyz)/allusedtext
    xyzpqrabcxyzpqr
    xyzpqrabcxyzpqr\=aftertext
    
/a\b/
    a.\=allusedtext
    a\=allusedtext  

/abc(?=abcde)(?=ab)/allusedtext
    abcabcdefg

/a*?b*?/
    ab

/(*NOTEMPTY)a*?b*?/
    ab
    ba
    cb  

/(*NOTEMPTY_ATSTART)a*?b*?/aftertext
    ab
    cdab 

/(a)(b)|(c)/
    XcX\=ovector=2,get=1,get=2,get=3,get=4,getall

/(?<A>aa)/
    aa\=get=A
    aa\=copy=A 

/a+/no_auto_possess
    a\=ovector=2,get=1,get=2,getall
    aaa\=ovector=2,get=1,get=2,getall

/a(b)c(d)/
    abc\=ph,copy=0,copy=1,getall

/ab(?C" any text with spaces ")cde/B
    abcde
    12abcde

/^a(b)c(?C1)def/
      abcdef

/^a(b)c(?C"AB")def/
      abcdef

/^a(b)c(?C1)def/
      abcdef\=callout_capture

/^a(b)c(?C{AB})def/B
      abcdef\=callout_capture

/^(?(?C25)(?=abc)abcd|xyz)/B
    abcdefg
    xyz123 

/^(?(?C$abc$)(?=abc)abcd|xyz)/B
    abcdefg
    xyz123 

/^ab(?C'first')cd(?C"second")ef/
    abcdefg

/(?:a(?C`code`)){3}X/
    aaaXY

# Binary zero in callout string
/"a(?C'x" 00 "z')b"/hex
    abcdefgh

/(?(?!)a|b)/
    bbb
\= Expect no match
    aaa 

/^/gm
    \n\n\n

/^/gm,alt_circumflex
    \n\n\n

/abc/use_offset_limit
    1234abcde\=offset_limit=100
    1234abcde\=offset_limit=9
    1234abcde\=offset_limit=4
    1234abcde\=offset_limit=4,offset=4
\= Expect no match
    1234abcde\=offset_limit=4,offset=5
    1234abcde\=offset_limit=3

/(?<=abc)/use_offset_limit
    1234abc\=offset_limit=7
\= Expect no match
    1234abc\=offset_limit=6

/abcd/null_context
    abcd\=null_context

/()()a+/no_auto_possess
    aaa\=allcaptures
    a\=allcaptures

/(*LIMIT_DEPTH=100)^((.)(?1)|.)$/
\= Expect depth limit exceeded
    a[00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]

/(*LIMIT_HEAP=0)^((.)(?1)|.)$/
\= Expect heap limit exceeded
    a[00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]

/(*LIMIT_HEAP=50000)^((.)(?1)|.)$/
\= Expect success
    a[00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]([00]

/(02-)?[0-9]{3}-[0-9]{3}/
    02-123-123

/^(a(?2))(b)(?1)/
    abbab\=find_limits 

/abc/endanchored
    xyzabc
\= Expect no match
    xyzabcdef
\= Expect error
    xyzabc\=ph

/abc/
    xyzabc\=endanchored
\= Expect no match
    xyzabcdef\=endanchored
\= Expect error
    xyzabc\=ps,endanchored

/abc|bcd/endanchored
    xyzabcd
\= Expect no match
    xyzabcdef

/(*NUL)^.*/
    a\nb\x00ccc
    
/(*NUL)^.*/s
    a\nb\x00ccc
    
/^x/m,newline=nul
    ab\x00xy
    
/'#comment' 0d 0a 00 '^x\' 0a 'y'/x,newline=nul,hex
    x\nyz 
 
/(*NUL)^X\NY/
    X\nY
    X\rY
\= Expect no match
    X\x00Y      

/(?<=abc|)/
    abcde\=aftertext
    
/(?<=|abc)/ 
    abcde\=aftertext

/(?<=abc|)/endanchored
    abcde\=aftertext
    
/(?<=|abc)/endanchored
    abcde\=aftertext

/(*LIMIT_MATCH=100).*(?![|H]?.*(?![|H]?););.*(?![|H]?.*(?![|H]?););\x00\x00\x00\x00\x00\x00\x00(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?![|);)?.*(![|H]?);)?.*(?![|H]?);)?.*(?![|H]?);)?.*(?![|H]););![|H]?););[|H]?);|H]?);)\x00\x00\x00\x00\x00\x00H]?););?![|H]?);)?.*(?![|H]?););[||H]?);)?.*(?![|H]?););[|H]?);(?![|H]?););![|H]?););[|H]?);|H]?);)?.*(?![|H]?););;[\x00\x00\x00\x00\x00\x00\x00![|H]?););![|H]?););[|H]?);|H]?);)?.*(?![|H]?););/no_dotstar_anchor
\= Expect limit exceeded
.*(?![|H]?.*(?![|H]?););.*(?![|H]?.*(?![|H]?););\x00\x00\x00\x00\x00\x00\x00(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?!(?![|);)?.*(![|H]?);)?.*(?![|H]?);)?.*(?![|H]?);)?.*(?![|H]););![|H]?););[|H]?);|H]?);)\x00\x00\x00\x00\x00\x00H]?););?![|H]?);)?.*(?![|H]?););[||H]?);)?.*(?![|H]?););[|H]?);(?![|H]?););![|H]?););[|H]?);|H]?);)?.*(?![|H]?););;[\x00\x00\x00\x00\x00\x00\x00![|H]?););![|H]?););[|H]?);|H]?);)?.*(?![|H]?););

/\n/firstline
    xyz\nabc

/\nabc/firstline
    xyz\nabc

/\x{0a}abc/firstline,newline=crlf
\= Expect no match
    xyz\r\nabc

/[abc]/firstline
\= Expect no match
    \na
    
/foobar/
    the foobar thing\=copy_matched_subject
    the foobar thing\=copy_matched_subject,zero_terminate

/foobar/g
    the foobar thing foobar again\=copy_matched_subject

/(?(VERSION>=0)^B0W)/
    B0W-W0W
\= Expect no match
    0

/(?(VERSION>=1000)^B0W|W0W)/
    B0W-W0W
\= Expect no match
    0

/(?<=pqr)abc(?=xyz)/
    123pqrabcxy\=ps,allusedtext
    123pqrabcxyz\=ps,allusedtext

/(?>a+b)/
    aaaa\=ps
    aaaab\=ps
    
/(abc)(?1)/
    abca\=ps
    abcabc\=ps

/(?(?=abc).*|Z)/
    ab\=ps
    abcxyz\=ps

/(abc)++x/
    abcab\=ps
    abc\=ps 
    ab\=ps
    abcx  

/\z/
    abc\=ph 
    abc\=ps 
   
/\Z/
    abc\=ph 
    abc\=ps 
    abc\n\=ph
    abc\n\=ps

/c*+(?<=[bc])/
    abc\=ph
    ab\=ph
    abc\=ps
    ab\=ps

/c++(?<=[bc])/
    abc\=ph
    ab\=ph

/(?<=(?=.(?<=x)))/
    abx
    ab\=ph
    bxyz 
    xyz

/(?![ab]).*/
    ab\=ph

/c*+/
    ab\=ph,offset=2

# End of testinput6