# SUSPEND BRANCHJ, off 1 V 1 ; "Independent" sub-RE.
# IFTHEN BRANCHJ, off 1 V 1 ; Switch, should be preceded by switcher.
# GROUPP GROUPP, num 1 ; Whether the group matched.
+#
+# If we were to start running out of regnodes, many of the ones that are
+# complements could be combined with their non-complement mates. For example,
+# POSIXU could have the flags field have the bottom bit mean do we complement
+# or not, and the type be shifted left 1 bit. Then all that would be needed to
+# extract which to do is a mask for the complement bit, and a right shift for
+# the other, an inconsequential increase in instructions. It might actually be
+# clearer and slightly faster given the case statement and assignment are
+# removed. Note that not everything could be collapsed: NPOSIXA, for example,
+# would require special handling for performance.
#* Exit points
# in regcomp.c uses the enum value of the modifier as an offset from the /d
# version. The complements must come after the non-complements.
# BOUND, POSIX and their complements are affected, as well as EXACTF.
-BOUND BOUND, no ; Like BOUNDA for non-utf8, otherwise match "" between any Unicode \w\W or \W\w
+BOUND BOUND, no ; Like BOUNDA for non-utf8, otherwise like BOUNDU
BOUNDL BOUND, no ; Like BOUND/BOUNDU, but \w and \W are defined by current locale
BOUNDU BOUND, no ; Match "" at any boundary of a given type using /u rules.
BOUNDA BOUND, no ; Match "" at any boundary between \w\W or \W\w, where \w is [_a-zA-Z0-9]
# All NBOUND nodes are required by code in regexec.c to be greater than all BOUND ones
-NBOUND NBOUND, no ; Like NBOUNDA for non-utf8, otherwise match "" between any Unicode \w\w or \W\W
+NBOUND NBOUND, no ; Like NBOUNDA for non-utf8, otherwise like BOUNDU
NBOUNDL NBOUND, no ; Like NBOUND/NBOUNDU, but \w and \W are defined by current locale
NBOUNDU NBOUND, no ; Match "" at any non-boundary of a given type using using /u rules.
NBOUNDA NBOUND, no ; Match "" betweeen any \w\w or \W\W, where \w is [_a-zA-Z0-9]
ANYOFH ANYOF, sv 1 S ; Like ANYOF, but only has "High" matches, none in the bitmap; the flags field contains the lowest matchable UTF-8 start byte
ANYOFHb ANYOF, sv 1 S ; Like ANYOFH, but all matches share the same UTF-8 start byte, given in the flags field
ANYOFHr ANYOF, sv 1 S ; Like ANYOFH, but the flags field contains packed bounds for all matchable UTF-8 start bytes.
-ANYOFHs ANYOF, sv anyofhs S ; Like ANYOFHb, but has a string field that gives the leading matchable UTF-8 bytes; flags field is len
+ANYOFHs ANYOF, sv 1 S ; Like ANYOFHb, but has a string field that gives the leading matchable UTF-8 bytes; flags field is len
ANYOFR ANYOFR, packed 1 S ; Matches any character in the range given by its packed args: upper 12 bits is the max delta from the base lower 20; the flags field contains the lowest matchable UTF-8 start byte
ANYOFRb ANYOFR, packed 1 S ; Like ANYOFR, but all matches share the same UTF-8 start byte, given in the flags field
# There is no ANYOFRr because khw doesn't think there are likely to be real-world cases where such a large range is used.
EXACTFU_S_EDGE EXACT, str ; /di rules, but nothing in it precludes /ui, except begins and/or ends with [Ss]; (string not UTF-8; compile-time only)
+#*New charclass like patterns
+LNBREAK LNBREAK, none ; generic newline pattern
+
+#*Trie Related
+
+#* Behave the same as A|LIST|OF|WORDS would. The '..C' variants
+#* have inline charclass data (ascii only), the 'C' store it in the
+#* structure.
+# NOTE: the relative order of the TRIE-like regops is significant
+
+TRIE TRIE, trie 1 ; Match many EXACT(F[ALU]?)? at once. flags==type
+TRIEC TRIE,trie charclass ; Same as TRIE, but with embedded charclass data
+
+# For start classes, contains an added fail table.
+AHOCORASICK TRIE, trie 1 ; Aho Corasick stclass. flags==type
+AHOCORASICKC TRIE,trie charclass ; Same as AHOCORASICK, but with embedded charclass data
+
#*Do nothing types
NOTHING NOTHING, no ; Match empty string.
#*This is not used yet
RENUM BRANCHJ, off 1 . 1 ; Group with independently numbered parens.
-#*Trie Related
-
-#* Behave the same as A|LIST|OF|WORDS would. The '..C' variants
-#* have inline charclass data (ascii only), the 'C' store it in the
-#* structure.
-# NOTE: the relative order of the TRIE-like regops is significant
-
-TRIE TRIE, trie 1 ; Match many EXACT(F[ALU]?)? at once. flags==type
-TRIEC TRIE,trie charclass ; Same as TRIE, but with embedded charclass data
-
-# For start classes, contains an added fail table.
-AHOCORASICK TRIE, trie 1 ; Aho Corasick stclass. flags==type
-AHOCORASICKC TRIE,trie charclass ; Same as AHOCORASICK, but with embedded charclass data
-
#*Regex Subroutines
GOSUB GOSUB, num/ofs 2L ; recurse to paren arg1 at (signed) ofs arg2
#*Control what to keep in $&.
KEEPS KEEPS, no ; $& begins here.
-#*New charclass like patterns
-LNBREAK LNBREAK, none ; generic newline pattern
-
-# NEW STUFF SOMEWHERE ABOVE THIS LINE
+# NEW STUFF SOMEWHERE ABOVE THIS LINE. Stuff that regexec.c: find_byclass()
+# and regrepeat() use should go way above, near LNBREAK to allow a more compact
+# jump table to be generated for their switch() statements
################################################################################
#* mean "not seen anything to optimize yet".
PSEUDO PSEUDO, off ; Pseudo opcode for internal use.
+REGEX_SET REGEX_SET, depth p S ; Regex set, temporary node used in pre-optimization compilation
+
-------------------------------------------------------------------------------
# Format for second section:
# REGOP \t typelist [ \t typelist]
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