Revert "Free up bit for regex ANYOF nodes"

This reverts commit 34fdef848b1687b91892ba55e9e0c3430e0770f6, and
adds comments referring to it, in case it is ever needed.

1 files changed, 137 insertions, 190 deletions

diff --git a/pod/perldebguts.pod b/pod/perldebguts.pod
index 60538df378..526124e96b 100644
--- a/pod/perldebguts.pod
+++ b/pod/perldebguts.pod
@@ -556,72 +556,56 @@ will be lost.
 
  # Exit points
 
- END                          no         End of program.
- SUCCEED                      no         Return from a subroutine,
-                                         basically.
+ END             no         End of program.
+ SUCCEED         no         Return from a subroutine, basically.
 
  # Anchors:
 
- BOL                          no         Match "" at beginning of line.
- MBOL                         no         Same, assuming multiline.
- SBOL                         no         Same, assuming singleline.
- EOS                          no         Match "" at end of string.
- EOL                          no         Match "" at end of line.
- MEOL                         no         Same, assuming multiline.
- SEOL                         no         Same, assuming singleline.
- BOUND                        no         Match "" at any word boundary
-                                         using native charset semantics
-                                         for non-utf8
- BOUNDL                       no         Match "" at any locale word
-                                         boundary
- BOUNDU                       no         Match "" at any word boundary
-                                         using Unicode semantics
- BOUNDA                       no         Match "" at any word boundary
-                                         using ASCII semantics
- NBOUND                       no         Match "" at any word non-
-                                         boundary using native charset
-                                         semantics for non-utf8
- NBOUNDL                      no         Match "" at any locale word non-
-                                         boundary
- NBOUNDU                      no         Match "" at any word non-
-                                         boundary using Unicode
-                                         semantics
- NBOUNDA                      no         Match "" at any word non-
-                                         boundary using ASCII semantics
- GPOS                         no         Matches where last m//g left
-                                         off.
+ BOL             no         Match "" at beginning of line.
+ MBOL            no         Same, assuming multiline.
+ SBOL            no         Same, assuming singleline.
+ EOS             no         Match "" at end of string.
+ EOL             no         Match "" at end of line.
+ MEOL            no         Same, assuming multiline.
+ SEOL            no         Same, assuming singleline.
+ BOUND           no         Match "" at any word boundary using native
+                            charset semantics for non-utf8
+ BOUNDL          no         Match "" at any locale word boundary
+ BOUNDU          no         Match "" at any word boundary using Unicode
+                            semantics
+ BOUNDA          no         Match "" at any word boundary using ASCII
+                            semantics
+ NBOUND          no         Match "" at any word non-boundary using
+                            native charset semantics for non-utf8
+ NBOUNDL         no         Match "" at any locale word non-boundary
+ NBOUNDU         no         Match "" at any word non-boundary using
+                            Unicode semantics
+ NBOUNDA         no         Match "" at any word non-boundary using
+                            ASCII semantics
+ GPOS            no         Matches where last m//g left off.
 
  # [Special] alternatives:
 
- REG_ANY                      no         Match any one character (except
-                                         newline).
- SANY                         no         Match any one character.
- CANY                         no         Match any one byte.
- ANYOF                        sv         Match character in (or not in)
-                                         this class, single char match
-                                         only
- ANYOF_NON_UTF8_NON_ASCII_ALL sv         like ANYOF, also matches any
-                                         U+80 - U+FF when not in UTF-8
-
- POSIXD                       none       Some [[:class:]] under /d; the
-                                         FLAGS field gives which one
- POSIXL                       none       Some [[:class:]] under /l; the
-                                         FLAGS field gives which one
- POSIXU                       none       Some [[:class:]] under /u; the
-                                         FLAGS field gives which one
- POSIXA                       none       Some [[:class:]] under /a; the
-                                         FLAGS field gives which one
- NPOSIXD                      none       complement of POSIXD,
-                                         [[:^class:]]
- NPOSIXL                      none       complement of POSIXL,
-                                         [[:^class:]]
- NPOSIXU                      none       complement of POSIXU,
-                                         [[:^class:]]
- NPOSIXA                      none       complement of POSIXA,
-                                         [[:^class:]]
-
- CLUMP                        no         Match any extended grapheme
-                                         cluster sequence
+ REG_ANY         no         Match any one character (except newline).
+ SANY            no         Match any one character.
+ CANY            no         Match any one byte.
+ ANYOF           sv         Match character in (or not in) this class,
+                            single char match only
+
+ POSIXD          none       Some [[:class:]] under /d; the FLAGS field
+                            gives which one
+ POSIXL          none       Some [[:class:]] under /l; the FLAGS field
+                            gives which one
+ POSIXU          none       Some [[:class:]] under /u; the FLAGS field
+                            gives which one
+ POSIXA          none       Some [[:class:]] under /a; the FLAGS field
+                            gives which one
+ NPOSIXD         none       complement of POSIXD, [[:^class:]]
+ NPOSIXL         none       complement of POSIXL, [[:^class:]]
+ NPOSIXU         none       complement of POSIXU, [[:^class:]]
+ NPOSIXA         none       complement of POSIXA, [[:^class:]]
+
+ CLUMP           no         Match any extended grapheme cluster sequence
 
  # Alternation
 
@@ -634,49 +618,40 @@ will be lost.
  #               pointer of each individual branch points; each branch
  #               starts with the operand node of a BRANCH node.
  #
- BRANCH                       node       Match this alternative, or the
-                                         next...
+ BRANCH          node       Match this alternative, or the next...
 
  # Back pointer
 
  # BACK          Normal "next" pointers all implicitly point forward;
  #               BACK exists to make loop structures possible.
  # not used
- BACK                         no         Match "", "next" ptr points
-                                         backward.
+ BACK            no         Match "", "next" ptr points backward.
 
  # Literals
 
- EXACT                        str        Match this string (preceded by
-                                         length).
- EXACTF                       str        Match this non-UTF-8 string
-                                         (not guaranteed to be folded)
-                                         using /id rules (w/len).
- EXACTFL                      str        Match this string (not
-                                         guaranteed to be folded) using
-                                         /il rules (w/len).
- EXACTFU                      str        Match this string (folded iff
-                                         in UTF-8, length in folding
-                                         doesn't change if not in UTF-8)
-                                         using /iu rules (w/len).
- EXACTFA                      str        Match this string (not
-                                         guaranteed to be folded) using
-                                         /iaa rules (w/len).
- EXACTFU_SS                   str        Match this string (folded iff
-                                         in UTF-8, length in folding may
-                                         change even if not in UTF-8)
-                                         using /iu rules (w/len).
- EXACTFA_NO_TRIE              str        Match this string (which is not
-                                         trie-able; not guaranteed to be
-                                         folded) using /iaa rules
-                                         (w/len).
+ EXACT           str        Match this string (preceded by length).
+ EXACTF          str        Match this non-UTF-8 string (not guaranteed
+                            to be folded) using /id rules (w/len).
+ EXACTFL         str        Match this string (not guaranteed to be
+                            folded) using /il rules (w/len).
+ EXACTFU         str        Match this string (folded iff in UTF-8,
+                            length in folding doesn't change if not in
+                            UTF-8) using /iu rules (w/len).
+ EXACTFA         str        Match this string (not guaranteed to be
+                            folded) using /iaa rules (w/len).
+ EXACTFU_SS      str        Match this string (folded iff in UTF-8,
+                            length in folding may change even if not in
+                            UTF-8) using /iu rules (w/len).
+ EXACTFA_NO_TRIE str        Match this string (which is not trie-able;
+                            not guaranteed to be folded) using /iaa
+                            rules (w/len).
 
  # Do nothing types
 
- NOTHING                      no         Match empty string.
+ NOTHING         no         Match empty string.
  # A variant of above which delimits a group, thus stops optimizations
- TAIL                         no         Match empty string. Can jump
-                                         here from outside.
+ TAIL            no         Match empty string. Can jump here from
+                            outside.
 
  # Loops
 
@@ -685,89 +660,68 @@ will be lost.
  #               (one character per match) are implemented with STAR
  #               and PLUS for speed and to minimize recursive plunges.
  #
- STAR                         node       Match this (simple) thing 0 or
-                                         more times.
- PLUS                         node       Match this (simple) thing 1 or
-                                         more times.
-
- CURLY                        sv 2       Match this simple thing {n,m}
-                                         times.
- CURLYN                       no 2       Capture next-after-this simple
-                                         thing
- CURLYM                       no 2       Capture this medium-complex
-                                         thing {n,m} times.
- CURLYX                       sv 2       Match this complex thing {n,m}
-                                         times.
+ STAR            node       Match this (simple) thing 0 or more times.
+ PLUS            node       Match this (simple) thing 1 or more times.
+
+ CURLY           sv 2       Match this simple thing {n,m} times.
+ CURLYN          no 2       Capture next-after-this simple thing
+ CURLYM          no 2       Capture this medium-complex thing {n,m}
+                            times.
+ CURLYX          sv 2       Match this complex thing {n,m} times.
 
  # This terminator creates a loop structure for CURLYX
- WHILEM                       no         Do curly processing and see if
-                                         rest matches.
+ WHILEM          no         Do curly processing and see if rest matches.
 
  # Buffer related
 
  # OPEN,CLOSE,GROUPP     ...are numbered at compile time.
- OPEN                         num 1      Mark this point in input as
-                                         start of #n.
- CLOSE                        num 1      Analogous to OPEN.
-
- REF                          num 1      Match some already matched
-                                         string
- REFF                         num 1      Match already matched string,
-                                         folded using native charset
-                                         semantics for non-utf8
- REFFL                        num 1      Match already matched string,
-                                         folded in loc.
- REFFU                        num 1      Match already matched string,
-                                         folded using unicode semantics
-                                         for non-utf8
- REFFA                        num 1      Match already matched string,
-                                         folded using unicode semantics
-                                         for non-utf8, no mixing ASCII,
-                                         non-ASCII
+ OPEN            num 1      Mark this point in input as start of #n.
+ CLOSE           num 1      Analogous to OPEN.
+
+ REF             num 1      Match some already matched string
+ REFF            num 1      Match already matched string, folded using
+                            native charset semantics for non-utf8
+ REFFL           num 1      Match already matched string, folded in loc.
+ REFFU           num 1      Match already matched string, folded using
+                            unicode semantics for non-utf8
+ REFFA           num 1      Match already matched string, folded using
+                            unicode semantics for non-utf8, no mixing
+                            ASCII, non-ASCII
 
  # Named references.  Code in regcomp.c assumes that these all are after
  # the numbered references
- NREF                         no-sv 1    Match some already matched
-                                         string
- NREFF                        no-sv 1    Match already matched string,
-                                         folded using native charset
-                                         semantics for non-utf8
- NREFFL                       no-sv 1    Match already matched string,
-                                         folded in loc.
- NREFFU                       num 1      Match already matched string,
-                                         folded using unicode semantics
-                                         for non-utf8
- NREFFA                       num 1      Match already matched string,
-                                         folded using unicode semantics
-                                         for non-utf8, no mixing ASCII,
-                                         non-ASCII
-
- IFMATCH                      off 1 2    Succeeds if the following
-                                         matches.
- UNLESSM                      off 1 2    Fails if the following matches.
- SUSPEND                      off 1 1    "Independent" sub-RE.
- IFTHEN                       off 1 1    Switch, should be preceded by
-                                         switcher.
- GROUPP                       num 1      Whether the group matched.
+ NREF            no-sv 1    Match some already matched string
+ NREFF           no-sv 1    Match already matched string, folded using
+                            native charset semantics for non-utf8
+ NREFFL          no-sv 1    Match already matched string, folded in loc.
+ NREFFU          num 1      Match already matched string, folded using
+                            unicode semantics for non-utf8
+ NREFFA          num 1      Match already matched string, folded using
+                            unicode semantics for non-utf8, no mixing
+                            ASCII, non-ASCII
+
+ IFMATCH         off 1 2    Succeeds if the following matches.
+ UNLESSM         off 1 2    Fails if the following matches.
+ SUSPEND         off 1 1    "Independent" sub-RE.
+ IFTHEN          off 1 1    Switch, should be preceded by switcher.
+ GROUPP          num 1      Whether the group matched.
 
  # Support for long RE
 
- LONGJMP                      off 1 1    Jump far away.
- BRANCHJ                      off 1 1    BRANCH with long offset.
+ LONGJMP         off 1 1    Jump far away.
+ BRANCHJ         off 1 1    BRANCH with long offset.
 
  # The heavy worker
 
- EVAL                         evl 1      Execute some Perl code.
+ EVAL            evl 1      Execute some Perl code.
 
  # Modifiers
 
- MINMOD                       no         Next operator is not greedy.
- LOGICAL                      no         Next opcode should set the flag
-                                         only.
+ MINMOD          no         Next operator is not greedy.
+ LOGICAL         no         Next opcode should set the flag only.
 
  # This is not used yet
- RENUM                        off 1 1    Group with independently
-                                         numbered parens.
+ RENUM           off 1 1    Group with independently numbered parens.
 
  # Trie Related
 
@@ -775,67 +729,60 @@ will be lost.
  # have inline charclass data (ascii only), the 'C' store it in the
  # structure.
 
- TRIE                         trie 1     Match many EXACT(F[ALU]?)? at
-                                         once. flags==type
- TRIEC                        trie       Same as TRIE, but with embedded
-                              charclass  charclass data
+ TRIE            trie 1     Match many EXACT(F[ALU]?)? at once.
+                            flags==type
+ TRIEC           trie       Same as TRIE, but with embedded charclass
+                 charclass  data
 
- AHOCORASICK                  trie 1     Aho Corasick stclass.
-                                         flags==type
- AHOCORASICKC                 trie       Same as AHOCORASICK, but with
-                              charclass  embedded charclass data
+ AHOCORASICK     trie 1     Aho Corasick stclass. flags==type
+ AHOCORASICKC    trie       Same as AHOCORASICK, but with embedded
+                 charclass  charclass data
 
  # Regex Subroutines
- GOSUB                        num/ofs 2L recurse to paren arg1 at
-                                         (signed) ofs arg2
- GOSTART                      no         recurse to start of pattern
+ GOSUB           num/ofs 2L recurse to paren arg1 at (signed) ofs arg2
+ GOSTART         no         recurse to start of pattern
 
  # Special conditionals
- NGROUPP                      no-sv 1    Whether the group matched.
- INSUBP                       num 1      Whether we are in a specific
-                                         recurse.
- DEFINEP                      none 1     Never execute directly.
+ NGROUPP         no-sv 1    Whether the group matched.
+ INSUBP          num 1      Whether we are in a specific recurse.
+ DEFINEP         none 1     Never execute directly.
 
  # Backtracking Verbs
- ENDLIKE                      none       Used only for the type field of
-                                         verbs
- OPFAIL                       none       Same as (?!)
- ACCEPT                       parno 1    Accepts the current matched
-                                         string.
+ ENDLIKE         none       Used only for the type field of verbs
+ OPFAIL          none       Same as (?!)
+ ACCEPT          parno 1    Accepts the current matched string.
 
  # Verbs With Arguments
- VERB                         no-sv 1    Used only for the type field of
-                                         verbs
- PRUNE                        no-sv 1    Pattern fails at this
-                                         startpoint if no-backtracking
-                                         through this
- MARKPOINT                    no-sv 1    Push the current location for
-                                         rollback by cut.
- SKIP                         no-sv 1    On failure skip forward (to the
-                                         mark) before retrying
- COMMIT                       no-sv 1    Pattern fails outright if
-                                         backtracking through this
- CUTGROUP                     no-sv 1    On failure go to the next
-                                         alternation in the group
+ VERB            no-sv 1    Used only for the type field of verbs
+ PRUNE           no-sv 1    Pattern fails at this startpoint if no-
+                            backtracking through this
+ MARKPOINT       no-sv 1    Push the current location for rollback by
+                            cut.
+ SKIP            no-sv 1    On failure skip forward (to the mark) before
+                            retrying
+ COMMIT          no-sv 1    Pattern fails outright if backtracking
+                            through this
+ CUTGROUP        no-sv 1    On failure go to the next alternation in the
+                            group
 
  # Control what to keep in $&.
- KEEPS                        no         $& begins here.
+ KEEPS           no         $& begins here.
 
  # New charclass like patterns
- LNBREAK                      none       generic newline pattern
+ LNBREAK         none       generic newline pattern
 
  # SPECIAL  REGOPS
 
  # This is not really a node, but an optimized away piece of a "long"
  # node.  To simplify debugging output, we mark it as if it were a node
- OPTIMIZED                    off        Placeholder for dump.
+ OPTIMIZED       off        Placeholder for dump.
 
  # Special opcode with the property that no opcode in a compiled program
  # will ever be of this type. Thus it can be used as a flag value that
  # no other opcode has been seen. END is used similarly, in that an END
  # node cant be optimized. So END implies "unoptimizable" and PSEUDO
  # mean "not seen anything to optimize yet".
- PSEUDO                       off        Pseudo opcode for internal use.
+ PSEUDO          off        Pseudo opcode for internal use.
 
 =for regcomp.pl end