/[pcre]/code/trunk/testdata/testoutput2

Diff of /code/trunk/testdata/testoutput2

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-revision 41 by nigel,
Sat Feb 24 21:39:17 2007 UTC
+revision 63 by nigel,
Sat Feb 24 21:40:03 2007 UTC
 Line 1
- PCRE version 2.08 31-Aug-1999
+ PCRE version 4.0 17-Feb-2003
  /(a)b|/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
  /abc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
      abc
 : abc
      defabc
 Line 25 
 No match
  No match
  /^abc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 'c'
+ Need char = 'c'
      abc
 : abc
      \Aabc
 Line 41 
 No match
  No match
  /a+bc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
  /a*bc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- Req char = 'c'
+ Need char = 'c'
  /a{3}bc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
  /(abc|a+z)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'a'
- No req char
+ No need char
  /^abc$/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 'c'
+ Need char = 'c'
      abc
 : abc
      *** Failers
 Line 91 
 Failed: number too big in {} quantifier
  /[abcd/
  Failed: missing terminating ] for character class at offset 5
- /[\B]/
+ /(?X)[\B]/
- Failed: invalid escape sequence in character class at offset 2
+ Failed: invalid escape sequence in character class at offset 6
- /[a-\w]/
- Failed: invalid escape sequence in character class at offset 4
  /[z-a]/
  Failed: range out of order in character class at offset 3
-Line 113 
 Failed: missing ) after comment at offse
+Line 110 
 Failed: missing ) after comment at offse
  Failed: unrecognized character after (? at offset 2
  /.*b/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char at start or follows \n
- Req char = 'b'
+ Need char = 'b'
  /.*?b/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char at start or follows \n
- Req char = 'b'
+ Need char = 'b'
  /cat|dog|elephant/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
      this sentence eventually mentions a cat
 : cat
      this sentences rambles on and on for a while and then reaches elephant
 : elephant
  /cat|dog|elephant/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: c d e
      this sentence eventually mentions a cat
 : cat
-Line 146 
 Starting character set: c d e
+Line 144 
 Starting character set: c d e
 : elephant
  /cat|dog|elephant/iS
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: caseless
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: C D E c d e
      this sentence eventually mentions a CAT cat
 : CAT
-Line 157 
 Starting character set: C D E c d e
+Line 156 
 Starting character set: C D E c d e
 : elephant
  /a|[bcd]/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: a b c d
  /(a|[^\dZ])/S
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
    \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
    \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
-Line 184 
 Starting character set: \x00 \x01 \x02 \
+Line 185 
 Starting character set: \x00 \x01 \x02 \
    \xfc \xfd \xfe \xff
  /(a|b)*[\s]/S
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
- Starting character set: \x09 \x0a \x0b \x0c \x0d \x20 a b
+ Study size = 40
+ Starting character set: \x09 \x0a \x0c \x0d \x20 a b
  /(ab\2)/
- Failed: back reference to non-existent subpattern at offset 6
+ Failed: reference to non-existent subpattern at offset 6
  /{4,5}abc/
  Failed: nothing to repeat at offset 4
  /(a)(b)(c)\2/
- Identifying subpattern count = 3
+ Capturing subpattern count = 3
+ Max back reference = 2
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
      abcb
 : abcb
 : a
-Line 227 
 Matched, but too many substrings
+Line 230 
 Matched, but too many substrings
 : c
  /(a)bc|(a)(b)\2/
- Identifying subpattern count = 3
+ Capturing subpattern count = 3
+ Max back reference = 2
  No options
  First char = 'a'
- No req char
+ No need char
      abc
 : abc
 : a
-Line 268 
 Matched, but too many substrings
+Line 272 
 Matched, but too many substrings
 : b
  /abc$/E
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: dollar_endonly
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
      abc
 : abc
      *** Failers
-Line 282 
 No match
+Line 286 
 No match
  No match
  /(a)(b)(c)(d)(e)\6/
- Failed: back reference to non-existent subpattern at offset 17
+ Failed: reference to non-existent subpattern at offset 17
  /the quick brown fox/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 't'
- Req char = 'x'
+ Need char = 'x'
      the quick brown fox
 : the quick brown fox
      this is a line with the quick brown fox
 : the quick brown fox
  /the quick brown fox/A
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 'x'
+ Need char = 'x'
      the quick brown fox
 : the quick brown fox
      *** Failers
-Line 310 
 No match
+Line 314 
 No match
  Failed: unrecognized character after (? at offset 4
  /^abc|def/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
      abcdef
 : abc
      abcdef\B
 : def
  /.*((abc)$|(def))/
- Identifying subpattern count = 3
+ Capturing subpattern count = 3
  No options
  First char at start or follows \n
- No req char
+ No need char
      defabc
 : defabc
 : abc
-Line 396 
 Failed: unmatched parentheses at offset
+Line 400 
 Failed: unmatched parentheses at offset
  Failed: missing terminating ] for character class at offset 4
  /[^aeiou ]{3,}/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
      co-processors, and for
 : -pr
  /<.*>/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = '<'
- Req char = '>'
+ Need char = '>'
      abc<def>ghi<klm>nop
 : <def>ghi<klm>
  /<.*?>/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = '<'
- Req char = '>'
+ Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
  /<.*>/U
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
- Req char = '>'
+ Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
- /<.*>(?U)/
+ /(?U)<.*>/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
- Req char = '>'
+ Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
  /<.*?>/U
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
- Req char = '>'
+ Need char = '>'
      abc<def>ghi<klm>nop
 : <def>ghi<klm>
  /={3,}/U
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: ungreedy
  First char = '='
- Req char = '='
+ Need char = '='
      abc========def
 : ===
  /(?U)={3,}?/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: ungreedy
  First char = '='
- Req char = '='
+ Need char = '='
      abc========def
 : ========
  /(?<!bar|cattle)foo/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'f'
- Req char = 'o'
+ Need char = 'o'
      foo
 : foo
      catfoo
-Line 485 
 Failed: lookbehind assertion is not fixe
+Line 489 
 Failed: lookbehind assertion is not fixe
  Failed: lookbehind assertion is not fixed length at offset 12
  /(?i)abc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: caseless
- First char = 'a'
+ First char = 'a' (caseless)
- Req char = 'c'
+ Need char = 'c' (caseless)
  /(a|(?m)a)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'a'
- No req char
+ No need char
  /(?i)^1234/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored caseless
  No first char
- Req char = '4'
+ Need char = '4'
  /(^b|(?i)^d)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: anchored
  Case state changes
  No first char
- No req char
+ No need char
  /(?s).*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored dotall
  No first char
- No req char
+ No need char
  /[abcd]/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: a b c d
  /(?i)[abcd]/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: caseless
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: A B C D a b c d
  /(?m)[xy]|(b|c)/S
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: multiline
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: b c x y
  /(^a|^b)/m
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: multiline
  First char at start or follows \n
- No req char
+ No need char
  /(?i)(^a|^b)/m
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: caseless multiline
  First char at start or follows \n
- No req char
+ No need char
  /(a)(?(1)a|b|c)/
  Failed: conditional group contains more than two branches at offset 13
-Line 564 
 Failed: assertion expected after (?( at
+Line 571 
 Failed: assertion expected after (?( at
  Failed: assertion expected after (?( at offset 3
  /(?(?<ab))/
- Failed: unrecognized character after (?< at offset 2
+ Failed: unrecognized character after (?< at offset 5
  /((?s)blah)\s+\1/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
+ Max back reference = 1
  No options
  First char = 'b'
- Req char = 'h'
+ Need char = 'h'
  /((?i)blah)\s+\1/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
+ Max back reference = 1
  No options
  Case state changes
- No first char
+ First char = 'b' (caseless)
- Req char = 'h'
+ Need char = 'h' (caseless)
  /((?i)b)/DS
  ------------------------------------------------------------------
-Line 590 
 Req char = 'h'
+Line 599 
 Req char = 'h'
  16 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  Case state changes
- No first char
+ First char = 'b' (caseless)
- Req char = 'b'
+ No need char
- Starting character set: B b
+ Study returned NULL
  /(a*b|(?i:c*(?-i)d))/S
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  Case state changes
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: C a b c d
  /a$/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
      a
 : a
      a\n
-Line 622 
 No match
+Line 632 
 No match
  No match
  /a$/m
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: multiline
  First char = 'a'
- No req char
+ No need char
      a
 : a
      a\n
-Line 638 
 No match
+Line 648 
 No match
  No match
  /\Aabc/m
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored multiline
  No first char
- Req char = 'c'
+ Need char = 'c'
  /^abc/m
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: multiline
  First char at start or follows \n
- Req char = 'c'
+ Need char = 'c'
  /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/
- Identifying subpattern count = 5
+ Capturing subpattern count = 5
  Options: anchored
  No first char
- Req char = 'a'
+ Need char = 'a'
    aaaaabbbbbcccccdef
 : aaaaabbbbbcccccdef
 : aaaaabbbbbcccccdef
-Line 663 
 Req char = 'a'
+Line 673 
 Req char = 'a'
 : def
  /(?<=foo)[ab]/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: a b
  /(?<!foo)(alpha|omega)/S
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- Req char = 'a'
+ Need char = 'a'
+ Study size = 40
  Starting character set: a o
  /(?!alphabet)[ab]/S
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
+ Study size = 40
  Starting character set: a b
  /(?<=foo\n)^bar/m
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: multiline
  First char at start or follows \n
- Req char = 'r'
+ Need char = 'r'
  /(?>^abc)/m
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: multiline
  First char at start or follows \n
- Req char = 'c'
+ Need char = 'c'
      abc
 : abc
      def\nabc
-Line 713 
 Failed: lookbehind assertion is not fixe
+Line 726 
 Failed: lookbehind assertion is not fixe
  Failed: lookbehind assertion is not fixed length at offset 13
  /The next three are in testinput2 because they have variable length branches/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'T'
- Req char = 's'
+ Need char = 's'
  /(?<=bullock|donkey)-cart/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = '-'
- Req char = 't'
+ Need char = 't'
      the bullock-cart
 : -cart
      a donkey-cart race
-Line 735 
 No match
+Line 748 
 No match
  No match
  /(?<=ab(?i)x|y|z)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  Case state changes
  No first char
- No req char
+ No need char
  /(?>.*)(?<=(abcd)|(xyz))/
- Identifying subpattern count = 2
+ Capturing subpattern count = 2
  No options
  First char at start or follows \n
- No req char
+ No need char
      alphabetabcd
 : alphabetabcd
 : abcd
-Line 755 
 No req char
+Line 768 
 No req char
 : xyz
  /(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  Case state changes
  First char = 'Z'
- Req char = 'Z'
+ Need char = 'Z'
      abxyZZ
 : ZZ
      abXyZZ
-Line 784 
 No match
+Line 797 
 No match
  No match
  /(?<!(foo)a)bar/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'b'
- Req char = 'r'
+ Need char = 'r'
      bar
 : bar
      foobbar
-Line 798 
 No match
+Line 811 
 No match
  No match
  /This one is here because Perl 5.005_02 doesn't fail it/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'T'
- Req char = 't'
+ Need char = 't'
  /^(a)?(?(1)a|b)+$/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: anchored
  No first char
- No req char
+ No need char
      *** Failers
  No match
      a
  No match
  /This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'T'
- Req char = 'g'
+ Need char = 'g'
  /^(a\1?){4}$/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
+ Max back reference = 1
  Options: anchored
  No first char
- Req char = 'a'
+ Need char = 'a'
      aaaaaa
 : aaaaaa
 : aa
  /These are syntax tests from Perl 5.005/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'T'
- Req char = '5'
+ Need char = '5'
  /a[b-a]/
  Failed: range out of order in character class at offset 4
-Line 862 
 Failed: nothing to repeat at offset 2
+Line 876 
 Failed: nothing to repeat at offset 2
  Failed: unmatched parentheses at offset 0
  /\1/
- Failed: back reference to non-existent subpattern at offset 2
+ Failed: reference to non-existent subpattern at offset 2
  /\2/
- Failed: back reference to non-existent subpattern at offset 2
+ Failed: reference to non-existent subpattern at offset 2
  /(a)|\2/
- Failed: back reference to non-existent subpattern at offset 6
+ Failed: reference to non-existent subpattern at offset 6
  /a[b-a]/i
  Failed: range out of order in character class at offset 4
-Line 901 
 Failed: unmatched parentheses at offset
+Line 915 
 Failed: unmatched parentheses at offset
  Failed: missing ) at offset 4
  /(?<%)b/
- Failed: unrecognized character after (?< at offset 0
+ Failed: unrecognized character after (?< at offset 3
  /a(?{)b/
  Failed: unrecognized character after (? at offset 3
-Line 943 
 Failed: POSIX code 9: bad escape sequenc
+Line 957 
 Failed: POSIX code 9: bad escape sequenc
  Failed: \ at end of pattern at offset 4
  /(a)bc(d)/
- Identifying subpattern count = 2
+ Capturing subpattern count = 2
  No options
  First char = 'a'
- Req char = 'd'
+ Need char = 'd'
      abcd
 : abcd
 : a
-Line 963 
 Req char = 'd'
+Line 977 
 Req char = 'd'
  copy substring 5 failed -7
  /(.{20})/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
      abcdefghijklmnopqrstuvwxyz
 : abcdefghijklmnopqrst
 : abcdefghijklmnopqrst
-Line 980 
 copy substring 1 failed -6
+Line 994 
 copy substring 1 failed -6
 G abcdefghijklmnopqrst (20)
  /(.{15})/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
      abcdefghijklmnopqrstuvwxyz
 : abcdefghijklmno
 : abcdefghijklmno
-Line 994 
 No req char
+Line 1008 
 No req char
 G abcdefghijklmno (15)
  /(.{16})/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
      abcdefghijklmnopqrstuvwxyz
 : abcdefghijklmnop
 : abcdefghijklmnop
-Line 1010 
 copy substring 1 failed -6
+Line 1024 
 copy substring 1 failed -6
 L abcdefghijklmnop
  /^(a|(bc))de(f)/
- Identifying subpattern count = 3
+ Capturing subpattern count = 3
  Options: anchored
  No first char
- Req char = 'f'
+ Need char = 'f'
      adef\G1\G2\G3\G4\L
 : adef
 : a
-Line 1048 
 get substring 4 failed -7
+Line 1062 
 get substring 4 failed -7
 C adef (4)
  /^abc\00def/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 'f'
+ Need char = 'f'
      abc\00def\L\C0
 : abc\x00def
 C abc (7)
-Line 1061 
 Req char = 'f'
+Line 1075 
 Req char = 'f'
  )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
  )?)?)?)?)?)?)?)?)?otherword/M
  Memory allocation (code space): 428
- Identifying subpattern count = 8
+ Capturing subpattern count = 8
  No options
  First char = 'w'
- Req char = 'd'
+ Need char = 'd'
  /.*X/D
  ------------------------------------------------------------------
-Line 1074 
 Req char = 'd'
+Line 1088 
 Req char = 'd'
   8 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char at start or follows \n
- Req char = 'X'
+ Need char = 'X'
  /.*X/Ds
  ------------------------------------------------------------------
-Line 1087 
 Req char = 'X'
+Line 1101 
 Req char = 'X'
   8 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored dotall
  No first char
- Req char = 'X'
+ Need char = 'X'
  /(.*X|^B)/D
  ------------------------------------------------------------------
-Line 1105 
 Req char = 'X'
+Line 1119 
 Req char = 'X'
  21 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char at start or follows \n
- No req char
+ No need char
  /(.*X|^B)/Ds
  ------------------------------------------------------------------
-Line 1123 
 No req char
+Line 1137 
 No req char
  21 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: anchored dotall
  No first char
- No req char
+ No need char
  /(?s)(.*X|^B)/D
  ------------------------------------------------------------------
-Line 1141 
 No req char
+Line 1155 
 No req char
  21 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  Options: anchored dotall
  No first char
- No req char
+ No need char
  /(?s:.*X|^B)/D
  ------------------------------------------------------------------
-Line 1162 
 No req char
+Line 1176 
 No req char
  27 Ket
     End
  ------------------------------------------------------------------
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char at start or follows \n
- No req char
+ No need char
  /\Biss\B/+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
-Line 1182 
 Req char = 's'
+Line 1196 
 Req char = 's'
 + issippi
  /iss/G+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
-Line 1193 
 Req char = 's'
+Line 1207 
 Req char = 's'
 + ippi
  /\Biss\B/G+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
  /\Biss\B/g+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
-Line 1217 
 No match
+Line 1231 
 No match
  No match
  /(?<=[Ms])iss/g+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
-Line 1228 
 Req char = 's'
+Line 1242 
 Req char = 's'
 + ippi
  /(?<=[Ms])iss/G+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'i'
- Req char = 's'
+ Need char = 's'
      Mississippi
 : iss
 + issippi
  /^iss/g+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 's'
+ Need char = 's'
      ississippi
 : iss
 + issippi
  /.*iss/g+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char at start or follows \n
- Req char = 's'
+ Need char = 's'
      abciss\nxyzisspqr
 : abciss
 + \x0axyzisspqr
-Line 1257 
 Req char = 's'
+Line 1271 
 Req char = 's'
 + pqr
  /.i./+g
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- Req char = 'i'
+ Need char = 'i'
      Mississippi
 : Mis
 + sissippi
-Line 1287 
 Req char = 'i'
+Line 1301 
 Req char = 'i'
 + souri river
  /^.is/+g
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 's'
+ Need char = 's'
      Mississippi
 : Mis
 + sissippi
  /^ab\n/g+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: anchored
  No first char
- Req char = 10
+ Need char = 10
      ab\nab\ncd
 : ab\x0a
 + ab\x0acd
  /^ab\n/mg+
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  Options: multiline
  First char at start or follows \n
- Req char = 10
+ Need char = 10
      ab\nab\ncd
 : ab\x0a
 + ab\x0acd
-Line 1316 
 Req char = 10
+Line 1330 
 Req char = 10
 + cd
  /abc/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
  /abc|bac/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- Req char = 'c'
+ Need char = 'c'
  /(abc|bac)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- Req char = 'c'
+ Need char = 'c'
  /(abc|(c|dc))/
- Identifying subpattern count = 2
+ Capturing subpattern count = 2
  No options
  No first char
- Req char = 'c'
+ Need char = 'c'
  /(abc|(d|de)c)/
- Identifying subpattern count = 2
+ Capturing subpattern count = 2
  No options
  No first char
- Req char = 'c'
+ Need char = 'c'
  /a*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
  /a+/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /(baa|a+)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- Req char = 'a'
+ Need char = 'a'
  /a{0,3}/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
  /baa{3,}/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'b'
- Req char = 'a'
+ Need char = 'a'
  /"([^\\"]+|\\.)*"/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = '"'
- Req char = '"'
+ Need char = '"'
  /(abc|ab[cd])/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'a'
- No req char
+ No need char
  /(a|.)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
  /a|ba|\w/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
  /abc(?=pqr)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'r'
+ Need char = 'r'
  /...(?<=abc)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
  /abc(?!pqr)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'c'
+ Need char = 'c'
  /ab./
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /ab[xyz]/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /abc*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /ab.c*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /a.c*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /.c*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
  /ac*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /(a.c*|b.c*)/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  No first char
- No req char
+ No need char
  /a.c*|aba/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /.+a/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- Req char = 'a'
+ Need char = 'a'
  /(?=abcda)a.*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ Need char = 'a'
  /(?=a)a.*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /a(b)*/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'a'
- No req char
+ No need char
  /a\d*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /ab\d*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /a(\d)*/
- Identifying subpattern count = 1
+ Capturing subpattern count = 1
  No options
  First char = 'a'
- No req char
+ No need char
  /abcde{0,0}/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'd'
+ Need char = 'd'
  /ab\d+/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /a(?(1)b)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /a(?(1)bag|big)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'g'
+ Need char = 'g'
  /a(?(1)bag|big)*/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- No req char
+ No need char
  /a(?(1)bag|big)+/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'g'
+ Need char = 'g'
  /a(?(1)b..|b..)/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'b'
+ Need char = 'b'
  /ab\d{0}e/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  First char = 'a'
- Req char = 'e'
+ Need char = 'e'
  /a?b?/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
      a
 : a
      b
-Line 1580 
 No req char
+Line 1594 
 No req char
  No match
  /|-/
- Identifying subpattern count = 0
+ Capturing subpattern count = 0
  No options
  No first char
- No req char
+ No need char
      abcd
 :
      -abc
-Line 1621 
 No match
+Line 1635 
 No match
 : bbbb
 : z
 : z
+ /^.?abcd/S
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ Need char = 'd'
+ Study returned NULL
+ /\(             # ( at start
+   (?:           # Non-capturing bracket
+   (?>[^()]+)    # Either a sequence of non-brackets (no backtracking)
+   |             # Or
+   (?R)          # Recurse - i.e. nested bracketed string
+   )*            # Zero or more contents
+   \)            # Closing )
+   /x
+ Capturing subpattern count = 0
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (abcd)
+: (abcd)
+     (abcd)xyz
+: (abcd)
+     xyz(abcd)
+: (abcd)
+     (ab(xy)cd)pqr
+: (ab(xy)cd)
+     (ab(xycd)pqr
+: (xycd)
+     () abc ()
+: ()
+(abcde(fsh)xyz(foo(bar))lmno)89
+: (abcde(fsh)xyz(foo(bar))lmno)
+     *** Failers
+ No match
+     abcd
+ No match
+     abcd)
+ No match
+     (abcd
+ No match
+ /\(  ( (?>[^()]+) | (?R) )* \) /xg
+ Capturing subpattern count = 1
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)pqr
+: (ab(xy)cd)
+: cd
+(abcd)(x(y)z)pqr
+: (abcd)
+: abcd
+: (x(y)z)
+: z
+ /\(  (?: (?>[^()]+) | (?R) ) \) /x
+ Capturing subpattern count = 0
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (abcd)
+: (abcd)
+     (ab(xy)cd)
+: (xy)
+     (a(b(c)d)e)
+: (c)
+     ((ab))
+: ((ab))
+     *** Failers
+ No match
+     ()
+ No match
+ /\(  (?: (?>[^()]+) | (?R) )? \) /x
+ Capturing subpattern count = 0
+ Options: extended
+ First char = '('
+ Need char = ')'
+     ()
+: ()
+(abcde(fsh)xyz(foo(bar))lmno)89
+: (fsh)
+ /\(  ( (?>[^()]+) | (?R) )* \) /x
+ Capturing subpattern count = 1
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)
+: (ab(xy)cd)
+: cd
+ /\( ( ( (?>[^()]+) | (?R) )* ) \) /x
+ Capturing subpattern count = 2
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)
+: (ab(xy)cd)
+: ab(xy)cd
+: cd
+ /\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x
+ Capturing subpattern count = 3
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)
+: (ab(xy)cd)
+: <unset>
+: ab(xy)cd
+: cd
+     (123ab(xy)cd)
+: (123ab(xy)cd)
+: 123
+: ab(xy)cd
+: cd
+ /\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x
+ Capturing subpattern count = 3
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)
+: (ab(xy)cd)
+: ab(xy)cd
+: <unset>
+: cd
+     (123ab(xy)cd)
+: (123ab(xy)cd)
+: 123ab(xy)cd
+: 123
+: cd
+ /\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x
+ Capturing subpattern count = 11
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(xy)cd)
+: (ab(xy)cd)
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: ab(xy)cd
+: cd
+ /\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x
+ Capturing subpattern count = 3
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (abcd(xyz<p>qrs)123)
+: (abcd(xyz<p>qrs)123)
+: abcd(xyz<p>qrs)123
+: 123
+: <unset>
+ /\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x
+ Capturing subpattern count = 3
+ Options: extended
+ First char = '('
+ Need char = ')'
+     (ab(cd)ef)
+: (ab(cd)ef)
+: ab(cd)ef
+: ef
+: (cd)
+     (ab(cd(ef)gh)ij)
+: (ab(cd(ef)gh)ij)
+: ab(cd(ef)gh)ij
+: ij
+: (cd(ef)gh)
+ /^[[:alnum:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [0-9A-Za-z]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:alpha:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [A-Za-z]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:ascii:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x00-\x7f]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:blank:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x09 ]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:cntrl:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x00-\x1f\x7f]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:digit:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [0-9]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:graph:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [!-~]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:lower:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [a-z]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:print:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [ -~]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:punct:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [!-/:-@[-`{-~]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:space:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x09-\x0d ]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:upper:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [A-Z]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:xdigit:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [0-9A-Fa-f]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:word:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [0-9A-Z_a-z]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:^cntrl:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [ -~\x80-\xff]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[12[:^digit:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x00-/1-2:-\xff]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:^blank:]]/D
+ ------------------------------------------------------------------
+ 37 Bra 0
+    ^
+    [\x00-\x08\x0a-\x1f!-\xff]
+ 37 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /[01[:alpha:]%]/D
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [%0-1A-Za-z]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[[.ch.]]/
+ Failed: POSIX collating elements are not supported at offset 1
+ /[[=ch=]]/
+ Failed: POSIX collating elements are not supported at offset 1
+ /[[:rhubarb:]]/
+ Failed: unknown POSIX class name at offset 3
+ /[[:upper:]]/i
+ Capturing subpattern count = 0
+ Options: caseless
+ No first char
+ No need char
+     A
+: A
+     a
+: a
+ /[[:lower:]]/i
+ Capturing subpattern count = 0
+ Options: caseless
+ No first char
+ No need char
+     A
+: A
+     a
+: a
+ /((?-i)[[:lower:]])[[:lower:]]/i
+ Capturing subpattern count = 1
+ Options: caseless
+ Case state changes
+ No first char
+ No need char
+     ab
+: ab
+: a
+     aB
+: aB
+: a
+     *** Failers
+: ai
+: a
+     Ab
+ No match
+     AB
+ No match
+ /[\200-\410]/
+ Failed: range out of order in character class at offset 9
+ /^(?(0)f|b)oo/
+ Failed: invalid condition (?(0) at offset 5
+ /This one's here because of the large output vector needed/
+ Capturing subpattern count = 0
+ No options
+ First char = 'T'
+ Need char = 'd'
+ /(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/
+ Capturing subpattern count = 271
+ Max back reference = 270
+ No options
+ No first char
+ No need char
+     \O900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 ABC ABC
+: 1
+: 2
+: 3
+: 4
+: 5
+: 6
+: 7
+: 8
+: 9
+: 10
+: 11
+: 12
+: 13
+: 14
+: 15
+: 16
+: 17
+: 18
+: 19
+: 20
+: 21
+: 22
+: 23
+: 24
+: 25
+: 26
+: 27
+: 28
+: 29
+: 30
+: 31
+: 32
+: 33
+: 34
+: 35
+: 36
+: 37
+: 38
+: 39
+: 40
+: 41
+: 42
+: 43
+: 44
+: 45
+: 46
+: 47
+: 48
+: 49
+: 50
+: 51
+: 52
+: 53
+: 54
+: 55
+: 56
+: 57
+: 58
+: 59
+: 60
+: 61
+: 62
+: 63
+: 64
+: 65
+: 66
+: 67
+: 68
+: 69
+: 70
+: 71
+: 72
+: 73
+: 74
+: 75
+: 76
+: 77
+: 78
+: 79
+: 80
+: 81
+: 82
+: 83
+: 84
+: 85
+: 86
+: 87
+: 88
+: 89
+: 90
+: 91
+: 92
+: 93
+: 94
+: 95
+: 96
+: 97
+: 98
+: 99
+: 100
+: 101
+: 102
+: 103
+: 104
+: 105
+: 106
+: 107
+: 108
+: 109
+: 110
+: 111
+: 112
+: 113
+: 114
+: 115
+: 116
+: 117
+: 118
+: 119
+: 120
+: 121
+: 122
+: 123
+: 124
+: 125
+: 126
+: 127
+: 128
+: 129
+: 130
+: 131
+: 132
+: 133
+: 134
+: 135
+: 136
+: 137
+: 138
+: 139
+: 140
+: 141
+: 142
+: 143
+: 144
+: 145
+: 146
+: 147
+: 148
+: 149
+: 150
+: 151
+: 152
+: 153
+: 154
+: 155
+: 156
+: 157
+: 158
+: 159
+: 160
+: 161
+: 162
+: 163
+: 164
+: 165
+: 166
+: 167
+: 168
+: 169
+: 170
+: 171
+: 172
+: 173
+: 174
+: 175
+: 176
+: 177
+: 178
+: 179
+: 180
+: 181
+: 182
+: 183
+: 184
+: 185
+: 186
+: 187
+: 188
+: 189
+: 190
+: 191
+: 192
+: 193
+: 194
+: 195
+: 196
+: 197
+: 198
+: 199
+: 200
+: 201
+: 202
+: 203
+: 204
+: 205
+: 206
+: 207
+: 208
+: 209
+: 210
+: 211
+: 212
+: 213
+: 214
+: 215
+: 216
+: 217
+: 218
+: 219
+: 220
+: 221
+: 222
+: 223
+: 224
+: 225
+: 226
+: 227
+: 228
+: 229
+: 230
+: 231
+: 232
+: 233
+: 234
+: 235
+: 236
+: 237
+: 238
+: 239
+: 240
+: 241
+: 242
+: 243
+: 244
+: 245
+: 246
+: 247
+: 248
+: 249
+: 250
+: 251
+: 252
+: 253
+: 254
+: 255
+: 256
+: 257
+: 258
+: 259
+: 260
+: 261
+: 262
+: 263
+: 264
+: 265
+: 266
+: 267
+: 268
+: 269
+: ABC
+: ABC
+ /This one's here because Perl does this differently and PCRE can't at present/
+ Capturing subpattern count = 0
+ No options
+ First char = 'T'
+ Need char = 't'
+ /(main(O)?)+/
+ Capturing subpattern count = 2
+ No options
+ First char = 'm'
+ Need char = 'n'
+     mainmain
+: mainmain
+: main
+     mainOmain
+: mainOmain
+: main
+: O
+ /These are all cases where Perl does it differently (nested captures)/
+ Capturing subpattern count = 1
+ No options
+ First char = 'T'
+ Need char = 's'
+ /^(a(b)?)+$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aba
+: aba
+: a
+: b
+ /^(aa(bb)?)+$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(aa|aa(bb))+$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(aa(bb)??)+$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(?:aa(bb)?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: bb
+ /^(aa(b(b))?)+$/
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: aa
+: bb
+: b
+ /^(?:aa(b(b))?)+$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: bb
+: b
+ /^(?:aa(b(?:b))?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: bb
+ /^(?:aa(bb(?:b))?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbbaa
+: aabbbaa
+: bbb
+ /^(?:aa(b(?:bb))?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbbaa
+: aabbbaa
+: bbb
+ /^(?:aa(?:b(b))?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbaa
+: aabbaa
+: b
+ /^(?:aa(?:b(bb))?)+$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbbaa
+: aabbbaa
+: bb
+ /^(aa(b(bb))?)+$/
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbbaa
+: aabbbaa
+: aa
+: bbb
+: bb
+ /^(aa(bb(bb))?)+$/
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ Need char = 'a'
+     aabbbbaa
+: aabbbbaa
+: aa
+: bbbb
+: bb
+ /--------------------------------------------------------------------/
+ Capturing subpattern count = 0
+ No options
+ First char = '-'
+ Need char = '-'
+ /#/xMD
+ Memory allocation (code space): 7
+ ------------------------------------------------------------------
+  3 Bra 0
+  3 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: extended
+ No first char
+ No need char
+ /a#/xMD
+ Memory allocation (code space): 13
+ ------------------------------------------------------------------
+  6 Bra 0
+  1 a
+  6 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: extended
+ First char = 'a'
+ No need char
+ /[\s]/D
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [\x09-\x0a\x0c-\x0d ]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[\S]/D
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [\x00-\x08\x0b\x0e-\x1f!-\xff]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /a(?i)b/D
+ ------------------------------------------------------------------
+ 11 Bra 0
+  1 a
+ 01 Opt
+  1 b
+ 11 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ Case state changes
+ First char = 'a'
+ Need char = 'b' (caseless)
+     ab
+: ab
+     aB
+: aB
+     *** Failers
+ No match
+     AB
+ No match
+ /(a(?i)b)/D
+ ------------------------------------------------------------------
+ 19 Bra 0
+ 11 Bra 1
+  1 a
+ 01 Opt
+  1 b
+ 11 Ket
+ 00 Opt
+ 19 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ Case state changes
+ First char = 'a'
+ Need char = 'b' (caseless)
+     ab
+: ab
+: ab
+     aB
+: aB
+: aB
+     *** Failers
+ No match
+     AB
+ No match
+ /   (?i)abc/xD
+ ------------------------------------------------------------------
+  8 Bra 0
+  3 abc
+  8 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: caseless extended
+ First char = 'a' (caseless)
+ Need char = 'c' (caseless)
+ /#this is a comment
+   (?i)abc/xD
+ ------------------------------------------------------------------
+  8 Bra 0
+  3 abc
+  8 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: caseless extended
+ First char = 'a' (caseless)
+ Need char = 'c' (caseless)
+ /123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+ ------------------------------------------------------------------
+307 Bra 0
+250 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+ 50 12345678901234567890123456789012345678901234567890
+307 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '1'
+ Need char = '0'
+ /\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/D
+ ------------------------------------------------------------------
+307 Bra 0
+250 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+ 50 12345678901234567890123456789012345678901234567890
+307 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '1'
+ Need char = '0'
+ /\Q\E/D
+ ------------------------------------------------------------------
+  3 Bra 0
+  3 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+     \
+:
+ /\Q\Ex/D
+ ------------------------------------------------------------------
+  6 Bra 0
+  1 x
+  6 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ / \Q\E/D
+ ------------------------------------------------------------------
+  6 Bra 0
+  1
+  6 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = ' '
+ No need char
+ /a\Q\E/D
+ ------------------------------------------------------------------
+  6 Bra 0
+  1 a
+  6 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+   abc
+: a
+   bca
+: a
+   bac
+: a
+ /a\Q\Eb/D
+ ------------------------------------------------------------------
+  9 Bra 0
+  1 a
+  1 b
+  9 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+   abc
+: ab
+ /\Q\Eabc/D
+ ------------------------------------------------------------------
+  8 Bra 0
+  3 abc
+  8 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /x*+\w/D
+ ------------------------------------------------------------------
+ 12 Bra 0
+  5 Once
+    x*
+  5 Ket
+    \w
+ 12 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+     *** Failers
+: F
+     xxxxx
+ No match
+ /x?+/D
+ ------------------------------------------------------------------
+ 11 Bra 0
+  5 Once
+    x?
+  5 Ket
+ 11 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /x++/D
+ ------------------------------------------------------------------
+ 11 Bra 0
+  5 Once
+    x+
+  5 Ket
+ 11 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ /x{1,3}+/D
+ ------------------------------------------------------------------
+ 16 Bra 0
+ 10 Once
+  1 x
+    x{,2}
+ 10 Ket
+ 16 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ /(x)*+/D
+ ------------------------------------------------------------------
+ 19 Bra 0
+ 13 Once
+    Brazero
+  6 Bra 1
+  1 x
+  6 KetRmax
+ 13 Ket
+ 19 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+ /^(\w++|\s++)*$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     now is the time for all good men to come to the aid of the party
+: now is the time for all good men to come to the aid of the party
+: party
+     *** Failers
+ No match
+     this is not a line with only words and spaces!
+ No match
+ /(\d++)(\w)/
+ Capturing subpattern count = 2
+ No options
+ No first char
+ No need char
+a
+: 12345a
+: 12345
+: a
+     *** Failers
+ No match
++
+ No match
+ /a++b/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+ /(a++b)/
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+: aaab
+ /(a++)b/
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+: aaa
+ /([^()]++|\([^()]*\))+/
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+     ((abc(ade)ufh()()x
+: abc(ade)ufh()()x
+: x
+ /\(([^()]++|\([^()]+\))+\)/
+ Capturing subpattern count = 1
+ No options
+ First char = '('
+ Need char = ')'
+     (abc)
+: (abc)
+: abc
+     (abc(def)xyz)
+: (abc(def)xyz)
+: xyz
+     *** Failers
+ No match
+     ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ No match
+ /(abc){1,3}+/D
+ ------------------------------------------------------------------
+ 50 Bra 0
+ 44 Once
+  8 Bra 1
+  3 abc
+  8 Ket
+    Brazero
+ 26 Bra 0
+  8 Bra 1
+  3 abc
+  8 Ket
+    Brazero
+  8 Bra 1
+  3 abc
+  8 Ket
+ 26 Ket
+ 44 Ket
+ 50 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /a+?+/
+ Failed: nothing to repeat at offset 3
+ /a{2,3}?+b/
+ Failed: nothing to repeat at offset 7
+ /(?U)a+?+/
+ Failed: nothing to repeat at offset 7
+ /a{2,3}?+b/U
+ Failed: nothing to repeat at offset 7
+ /x(?U)a++b/D
+ ------------------------------------------------------------------
+ 17 Bra 0
+  1 x
+  5 Once
+    a+
+  5 Ket
+  1 b
+ 17 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ Need char = 'b'
+     xaaaab
+: xaaaab
+ /(?U)xa++b/D
+ ------------------------------------------------------------------
+ 17 Bra 0
+  1 x
+  5 Once
+    a+
+  5 Ket
+  1 b
+ 17 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: ungreedy
+ First char = 'x'
+ Need char = 'b'
+     xaaaab
+: xaaaab
+ /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/D
+ ------------------------------------------------------------------
+106 Bra 0
+    ^
+ 99 Bra 1
+  5 Bra 2
+    a+
+  5 Ket
+ 37 Bra 3
+    [a-b]+?
+ 37 Ket
+ 37 Bra 4
+    [b-c]+
+ 37 Ket
+  5 Bra 5
+    \w*
+  5 Ket
+ 99 Ket
+106 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 5
+ Options: anchored
+ No first char
+ Need char = 'a'
+ /^x(?U)a+b/D
+ ------------------------------------------------------------------
+ 12 Bra 0
+    ^
+  1 x
+    a+?
+  1 b
+ 12 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ Need char = 'b'
+ /^x(?U)(a+)b/D
+ ------------------------------------------------------------------
+ 18 Bra 0
+    ^
+  1 x
+  5 Bra 1
+    a+?
+  5 Ket
+  1 b
+ 18 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'b'
+ /[.x.]/
+ Failed: POSIX collating elements are not supported at offset 0
+ /[=x=]/
+ Failed: POSIX collating elements are not supported at offset 0
+ /[:x:]/
+ Failed: POSIX named classes are supported only within a class at offset 0
+ /\l/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\L/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\N{name}/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\pP/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\PP/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\p{prop}/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\P{prop}/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\u/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\U/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /\X/
+ Failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1
+ /[/
+ Failed: missing terminating ] for character class at offset 1
+ /[a-/
+ Failed: missing terminating ] for character class at offset 3
+ /[[:space:]/
+ Failed: missing terminating ] for character class at offset 10
+ /[\s]/DM
+ Memory allocation (code space): 40
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [\x09-\x0a\x0c-\x0d ]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[[:space:]]/DM
+ Memory allocation (code space): 40
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [\x09-\x0d ]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[[:space:]abcde]/DM
+ Memory allocation (code space): 40
+ ------------------------------------------------------------------
+ 36 Bra 0
+    [\x09-\x0d a-e]
+ 36 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /< (?: (?(R) \d++  | [^<>]*+) | (?R)) * >/x
+ Capturing subpattern count = 0
+ Options: extended
+ First char = '<'
+ Need char = '>'
+     <>
+: <>
+     <abcd>
+: <abcd>
+     <abc <123> hij>
+: <abc <123> hij>
+     <abc <def> hij>
+: <def>
+     <abc<>def>
+: <abc<>def>
+     <abc<>
+: <>
+     *** Failers
+ No match
+     <abc
+ No match
+ |8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+ Memory allocation (code space): 421
+ ------------------------------------------------------------------
+417 Bra 0
+250 8J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:
+159 x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+    \b
+417 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '8'
+ Need char = 'X'
+ |\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|DM
+ Memory allocation (code space): 416
+ ------------------------------------------------------------------
+412 Bra 0
+250 $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[
+154 %z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+    \b
+412 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '$'
+ Need char = 'X'
+ /(.*)\d+\1/I
+ Capturing subpattern count = 1
+ Max back reference = 1
+ No options
+ No first char
+ No need char
+ /(.*)\d+/I
+ Capturing subpattern count = 1
+ No options
+ First char at start or follows \n
+ No need char
+ /(.*)\d+\1/Is
+ Capturing subpattern count = 1
+ Max back reference = 1
+ Options: dotall
+ No first char
+ No need char
+ /(.*)\d+/Is
+ Capturing subpattern count = 1
+ Options: anchored dotall
+ No first char
+ No need char
+ /(.*(xyz))\d+\2/I
+ Capturing subpattern count = 2
+ Max back reference = 2
+ No options
+ First char at start or follows \n
+ Need char = 'z'
+ /((.*))\d+\1/I
+ Capturing subpattern count = 2
+ Max back reference = 1
+ No options
+ No first char
+ No need char
+     abc123bc
+: bc123bc
+: bc
+: bc
+ /a[b]/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(?=a).*/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /(?=abc).xyz/iI
+ Capturing subpattern count = 0
+ Options: caseless
+ First char = 'a' (caseless)
+ Need char = 'z' (caseless)
+ /(?=abc)(?i).xyz/I
+ Capturing subpattern count = 0
+ No options
+ Case state changes
+ First char = 'a'
+ Need char = 'z' (caseless)
+ /(?=a)(?=b)/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /(?=.)a/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /((?=abcda)a)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'a'
+ /((?=abcda)ab)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /()a/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ Need char = 'a'
+ /(?(1)ab|ac)/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /(?(1)abz|acz)/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'z'
+ /(?(1)abz)/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /(?(1)abz)123/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = '3'
+ /(a)+/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ No need char
+ /(a){2,3}/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'a'
+ /(a)*/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+ /[a]/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /[ab]/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[ab]/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ Study size = 40
+ Starting character set: a b
+ /[^a]/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /\d456/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = '6'
+ /\d456/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = '6'
+ Study size = 40
+ Starting character set: 0 1 2 3 4 5 6 7 8 9
+ /a^b/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /^a/mI
+ Capturing subpattern count = 0
+ Options: multiline
+ First char at start or follows \n
+ Need char = 'a'
+   abcde
+: a
+   xy\nabc
+: a
+   *** Failers
+ No match
+   xyabc
+ No match
+ /c|abc/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = 'c'
+ /(?i)[ab]/IS
+ Capturing subpattern count = 0
+ Options: caseless
+ No first char
+ No need char
+ Study size = 40
+ Starting character set: A B a b
+ /[ab](?i)cd/IS
+ Capturing subpattern count = 0
+ No options
+ Case state changes
+ No first char
+ Need char = 'd' (caseless)
+ Study size = 40
+ Starting character set: a b
+ /abc(?C)def/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+     abcdef
+ --->abcdef
+^  ^
+: abcdef
+abcdef
+ --->1234abcdef
+    ^  ^
+: abcdef
+     *** Failers
+ No match
+     abcxyz
+ No match
+     abcxyzf
+ --->abcxyzf
+^  ^
+ No match
+ /abc(?C)de(?C1)f/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+abcdef
+ --->123abcdef
+   ^  ^
+   ^    ^
+: abcdef
+ /(?C1)\dabc(?C2)def/
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = 'f'
+abcdef
+ --->1234abcdef
+^
+ ^
+  ^
+   ^
+   ^   ^
+: 4abcdef
+     *** Failers
+ No match
+     abcdef
+ --->abcdef
+^
+ ^
+  ^
+   ^
+    ^
+     ^
+ No match
+ /(?C255)ab/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(?C256)ab/
+ Failed: number after (?C is > 255 at offset 6
+ /(?Cab)xx/
+ Failed: closing ) for (?C expected at offset 3
+ /(?C12vr)x/
+ Failed: closing ) for (?C expected at offset 5
+ /abc(?C)def/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+     *** Failers
+ No match
+     \x83\x0\x61bcdef
+ --->\x83\x00abcdef
+        ^  ^
+: abcdef
+ /(abc)(?C)de(?C1)f/
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'f'
+abcdef
+ --->123abcdef
+   ^  ^
+   ^    ^
+: abcdef
+: abc
+abcdef\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->123abcdef
+        ^  ^
+ Callout 1: last capture = 1
+: <unset>
+: abc
+ --->123abcdef
+        ^    ^
+: abcdef
+: abc
+abcdef\C-
+: abcdef
+: abc
+     *** Failers
+ No match
+abcdef\C!1
+ --->123abcdef
+   ^  ^
+   ^    ^
+ No match
+ /(?C0)(abc(?C1))*/
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+     abcabcabc
+ --->abcabcabc
+^
+^  ^
+^     ^
+^        ^
+: abcabcabc
+: abc
+     abcabc\C!1!3
+ --->abcabc
+^
+^  ^
+^     ^
+: abcabc
+: abc
+     *** Failers
+ --->*** Failers
+^
+:
+     abcabcabc\C!1!3
+ --->abcabcabc
+^
+^  ^
+^     ^
+^        ^
+: abcabc
+: abc
+ /(\d{3}(?C))*/
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123
+     ^  ^
+: 123
+: 123
+\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123456
+     ^  ^
+ Callout 0: last capture = 1
+: <unset>
+: 123
+ --->123456
+     ^     ^
+: 123456
+: 456
+     123456789\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123456789
+     ^  ^
+ Callout 0: last capture = 1
+: <unset>
+: 123
+ --->123456789
+     ^     ^
+ Callout 0: last capture = 1
+: <unset>
+: 456
+ --->123456789
+     ^        ^
+: 123456789
+: 789
+ /((xyz)(?C)p|(?C1)xyzabc)/
+ Capturing subpattern count = 2
+ No options
+ First char = 'x'
+ No need char
+     xyzabc\C+
+ Callout 0: last capture = 2
+: <unset>
+: <unset>
+: xyz
+ --->xyzabc
+     ^  ^
+ Callout 1: last capture = -1
+: <unset>
+ --->xyzabc
+     ^
+: xyzabc
+: xyzabc
+ /(X)((xyz)(?C)p|(?C1)xyzabc)/
+ Capturing subpattern count = 3
+ No options
+ First char = 'X'
+ Need char = 'x'
+     Xxyzabc\C+
+ Callout 0: last capture = 3
+: <unset>
+: X
+: <unset>
+: xyz
+ --->Xxyzabc
+     ^   ^
+ Callout 1: last capture = 1
+: <unset>
+: X
+ --->Xxyzabc
+     ^^
+: Xxyzabc
+: X
+: xyzabc
+ /(?=(abc))(?C)abcdef/
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'f'
+     abcdef\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->abcdef
+     ^
+: abcdef
+: abc
+ /(?!(abc)(?C1)d)(?C2)abcxyz/
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'z'
+     abcxyz\C+
+ Callout 1: last capture = 1
+: <unset>
+: abc
+ --->abcxyz
+     ^  ^
+ Callout 2: last capture = -1
+: <unset>
+ --->abcxyz
+     ^
+: abcxyz
+ /(?<=(abc)(?C))xyz/
+ Capturing subpattern count = 1
+ No options
+ First char = 'x'
+ Need char = 'z'
+    abcxyz\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->abcxyz
+        ^
+: xyz
+: abc
+ /(?C)abc/
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /(?C)^abc/
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ Need char = 'c'
+ /(?C)a|b/S
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ Study size = 40
+ Starting character set: a b
+ /(?R)/
+ Failed: recursive call could loop indefinitely at offset 3
+ /(a|(?R))/
+ Failed: recursive call could loop indefinitely at offset 6
+ /(ab|(bc|(de|(?R))))/
+ Failed: recursive call could loop indefinitely at offset 15
+ /x(ab|(bc|(de|(?R))))/
+ Capturing subpattern count = 3
+ No options
+ First char = 'x'
+ No need char
+     xab
+: xab
+: ab
+     xbc
+: xbc
+: bc
+: bc
+     xde
+: xde
+: de
+: de
+: de
+     xxab
+: xxab
+: xab
+: xab
+: xab
+     xxxab
+: xxxab
+: xxab
+: xxab
+: xxab
+     *** Failers
+ No match
+     xyab
+ No match
+ /(ab|(bc|(de|(?1))))/
+ Failed: recursive call could loop indefinitely at offset 15
+ /x(ab|(bc|(de|(?1)x)x)x)/
+ Failed: recursive call could loop indefinitely at offset 16
+ /^([^()]|\((?1)*\))*$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     abc
+: abc
+: c
+     a(b)c
+: a(b)c
+: c
+     a(b(c))d
+: a(b(c))d
+: d
+     *** Failers)
+ No match
+     a(b(c)d
+ No match
+ /^>abc>([^()]|\((?1)*\))*<xyz<$/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = '<'
+    >abc>123<xyz<
+: >abc>123<xyz<
+: 3
+    >abc>1(2)3<xyz<
+: >abc>1(2)3<xyz<
+: 3
+    >abc>(1(2)3)<xyz<
+: >abc>(1(2)3)<xyz<
+: (1(2)3)
+ /(a(?1)b)/D
+ ------------------------------------------------------------------
+ 18 Bra 0
+ 12 Bra 1
+  1 a
+  3 Recurse
+  1 b
+ 12 Ket
+ 18 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(a(?1)+b)/D
+ ------------------------------------------------------------------
+ 24 Bra 0
+ 18 Bra 1
+  1 a
+  6 Bra 0
+  3 Recurse
+  6 KetRmax
+  1 b
+ 18 Ket
+ 24 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /^\W*(?:((.)\W*(?1)\W*\2|)|((.)\W*(?3)\W*\4|\W*.\W*))\W*$/i
+ Capturing subpattern count = 4
+ Max back reference = 4
+ Options: anchored caseless
+ No first char
+ No need char
+: 1221
+: 1221
+: 1
+     Satan, oscillate my metallic sonatas!
+: Satan, oscillate my metallic sonatas!
+: <unset>
+: <unset>
+: Satan, oscillate my metallic sonatas
+: S
+     A man, a plan, a canal: Panama!
+: A man, a plan, a canal: Panama!
+: <unset>
+: <unset>
+: A man, a plan, a canal: Panama
+: A
+     Able was I ere I saw Elba.
+: Able was I ere I saw Elba.
+: <unset>
+: <unset>
+: Able was I ere I saw Elba
+: A
+     *** Failers
+ No match
+     The quick brown fox
+ No match
+ /^(\d+|\((?1)([+*-])(?1)\)|-(?1))$/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+: 12
+: 12
+     (((2+2)*-3)-7)
+: (((2+2)*-3)-7)
+: (((2+2)*-3)-7)
+: -
+     -12
+: -12
+: -12
+     *** Failers
+ No match
+     ((2+2)*-3)-7)
+ No match
+ /^(x(y|(?1){2})z)/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = 'z'
+     xyz
+: xyz
+: xyz
+: y
+     xxyzxyzz
+: xxyzxyzz
+: xxyzxyzz
+: xyzxyz
+     *** Failers
+ No match
+     xxyzz
+ No match
+     xxyzxyzxyzz
+ No match
+ /((< (?: (?(R) \d++  | [^<>]*+) | (?2)) * >))/x
+ Capturing subpattern count = 2
+ Options: extended
+ First char = '<'
+ Need char = '>'
+     <>
+: <>
+: <>
+: <>
+     <abcd>
+: <abcd>
+: <abcd>
+: <abcd>
+     <abc <123> hij>
+: <abc <123> hij>
+: <abc <123> hij>
+: <abc <123> hij>
+     <abc <def> hij>
+: <def>
+: <def>
+: <def>
+     <abc<>def>
+: <abc<>def>
+: <abc<>def>
+: <abc<>def>
+     <abc<>
+: <>
+: <>
+: <>
+     *** Failers
+ No match
+     <abc
+ No match
+ /(?1)/
+ Failed: reference to non-existent subpattern at offset 3
+ /((?2)(abc)/
+ Failed: reference to non-existent subpattern at offset 4
+ /^(abc)def(?1)/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'f'
+     abcdefabc
+: abcdefabc
+: abc
+ /^(a|b|c)=(?1)+/
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = '='
+     a=a
+: a=a
+: a
+     a=b
+: a=b
+: a
+     a=bc
+: a=bc
+: a
+ /^(a|b|c)=((?1))+/
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ Need char = '='
+     a=a
+: a=a
+: a
+: a
+     a=b
+: a=b
+: a
+: b
+     a=bc
+: a=bc
+: a
+: c
+ /a(?P<name1>b|c)d(?P<longername2>e)/D
+ ------------------------------------------------------------------
+ 33 Bra 0
+  1 a
+  6 Bra 1
+  1 b
+  6 Alt
+  1 c
+ 12 Ket
+  1 d
+  6 Bra 2
+  1 e
+  6 Ket
+ 33 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 2
+ Named capturing subpatterns:
+   longername2   2
+   name1         1
+ No options
+ First char = 'a'
+ Need char = 'e'
+     abde
+: abde
+: b
+: e
+     acde
+: acde
+: c
+: e
+ /(?:a(?P<c>c(?P<d>d)))(?P<a>a)/D
+ ------------------------------------------------------------------
+ 39 Bra 0
+ 24 Bra 0
+  1 a
+ 15 Bra 1
+  1 c
+  6 Bra 2
+  1 d
+  6 Ket
+ 15 Ket
+ 24 Ket
+  6 Bra 3
+  1 a
+  6 Ket
+ 39 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 3
+ Named capturing subpatterns:
+   a   3
+   c   1
+   d   2
+ No options
+ First char = 'a'
+ Need char = 'a'
+ /(?P<a>a)...(?P=a)bbb(?P>a)d/D
+ ------------------------------------------------------------------
+ 29 Bra 0
+  6 Bra 1
+  1 a
+  6 Ket
+    Any
+    Any
+    Any
+    \1
+  3 bbb
+  3 Recurse
+  1 d
+ 29 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ Max back reference = 1
+ Named capturing subpatterns:
+   a   1
+ No options
+ First char = 'a'
+ Need char = 'd'
+ /^\W*(?:(?P<one>(?P<two>.)\W*(?P>one)\W*(?P=two)|)|(?P<three>(?P<four>.)\W*(?P>three)\W*(?P=four)|\W*.\W*))\W*$/i
+ Capturing subpattern count = 4
+ Max back reference = 4
+ Named capturing subpatterns:
+   four    4
+   one     1
+   three   3
+   two     2
+ Options: anchored caseless
+ No first char
+ No need char
+: 1221
+: 1221
+: 1
+     Satan, oscillate my metallic sonatas!
+: Satan, oscillate my metallic sonatas!
+: <unset>
+: <unset>
+: Satan, oscillate my metallic sonatas
+: S
+     A man, a plan, a canal: Panama!
+: A man, a plan, a canal: Panama!
+: <unset>
+: <unset>
+: A man, a plan, a canal: Panama
+: A
+     Able was I ere I saw Elba.
+: Able was I ere I saw Elba.
+: <unset>
+: <unset>
+: Able was I ere I saw Elba
+: A
+     *** Failers
+ No match
+     The quick brown fox
+ No match
+ /((?(R)a|b))\1(?1)?/
+ Capturing subpattern count = 1
+ Max back reference = 1
+ No options
+ No first char
+ No need char
+   bb
+: bb
+: b
+   bbaa
+: bba
+: b
+ /(.*)a/sI
+ Capturing subpattern count = 1
+ Options: anchored dotall
+ No first char
+ Need char = 'a'
+ /(.*)a\1/sI
+ Capturing subpattern count = 1
+ Max back reference = 1
+ Options: dotall
+ No first char
+ Need char = 'a'
+ /(.*)a(b)\2/sI
+ Capturing subpattern count = 2
+ Max back reference = 2
+ Options: anchored dotall
+ No first char
+ Need char = 'b'
+ /((.*)a|(.*)b)z/sI
+ Capturing subpattern count = 3
+ Options: anchored dotall
+ No first char
+ Need char = 'z'
+ /((.*)a|(.*)b)z\1/sI
+ Capturing subpattern count = 3
+ Max back reference = 1
+ Options: dotall
+ No first char
+ Need char = 'z'
+ /((.*)a|(.*)b)z\2/sI
+ Capturing subpattern count = 3
+ Max back reference = 2
+ Options: dotall
+ No first char
+ Need char = 'z'
+ /((.*)a|(.*)b)z\3/sI
+ Capturing subpattern count = 3
+ Max back reference = 3
+ Options: dotall
+ No first char
+ Need char = 'z'
+ /((.*)a|^(.*)b)z\3/sI
+ Capturing subpattern count = 3
+ Max back reference = 3
+ Options: anchored dotall
+ No first char
+ Need char = 'z'
+ /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a/sI
+ Capturing subpattern count = 31
+ Options: anchored dotall
+ No first char
+ No need char
+ /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\31/sI
+ Capturing subpattern count = 31
+ Max back reference = 31
+ Options: dotall
+ No first char
+ No need char
+ /(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)|(.*)a\32/sI
+ Capturing subpattern count = 32
+ Max back reference = 32
+ Options: dotall
+ No first char
+ No need char
+ /(a)(bc)/ND
+ ------------------------------------------------------------------
+ 22 Bra 0
+  6 Bra 0
+  1 a
+  6 Ket
+  7 Bra 0
+  2 bc
+  7 Ket
+ 22 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options:
+ First char = 'a'
+ Need char = 'c'
+   abc
+: abc
+ /(?P<one>a)(bc)/ND
+ ------------------------------------------------------------------
+ 22 Bra 0
+  6 Bra 1
+  1 a
+  6 Ket
+  7 Bra 0
+  2 bc
+  7 Ket
+ 22 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ Named capturing subpatterns:
+   one   1
+ Options:
+ First char = 'a'
+ Need char = 'c'
+   abc
+: abc
+: a
+ /(a)(?P<named>bc)/ND
+ ------------------------------------------------------------------
+ 22 Bra 0
+  6 Bra 0
+  1 a
+  6 Ket
+  7 Bra 1
+  2 bc
+  7 Ket
+ 22 Ket
+    End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ Named capturing subpatterns:
+   named   1
+ Options:
+ First char = 'a'
+ Need char = 'c'