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
|
# regcomp.sym
#
# File has two sections, divided by a line of dashes '-'.
#
# Empty rows after #-comment are removed from input are ignored
#
# First section is for regops, second section is for regmatch-states
#
# Note that the order in this file is important.
#
# Format for first section:
# NAME \s+ TYPE, arg-description [flags] [num-args] [longjump-len] ; DESCRIPTION
#
#
# run perl regen.pl after editing this file
#* Exit points
END END, no ; End of program.
SUCCEED END, no ; Return from a subroutine, basically.
#* Anchors:
BOL BOL, no ; Match "" at beginning of line.
MBOL BOL, no ; Same, assuming multiline.
SBOL BOL, no ; Same, assuming singleline.
EOS EOL, no ; Match "" at end of string.
EOL EOL, no ; Match "" at end of line.
MEOL EOL, no ; Same, assuming multiline.
SEOL EOL, no ; Same, assuming singleline.
BOUND BOUND, no ; Match "" at any word boundary using native charset semantics for non-utf8
BOUNDL BOUND, no ; Match "" at any locale word boundary
BOUNDU BOUND, no ; Match "" at any word boundary using Unicode semantics
BOUNDA BOUND, no ; Match "" at any word boundary using ASCII semantics
# All NBOUND nodes are required by a line regexec.c to be greater than all BOUND ones
NBOUND NBOUND, no ; Match "" at any word non-boundary using native charset semantics for non-utf8
NBOUNDL NBOUND, no ; Match "" at any locale word non-boundary
NBOUNDU NBOUND, no ; Match "" at any word non-boundary using Unicode semantics
NBOUNDA NBOUND, no ; Match "" at any word non-boundary using ASCII semantics
GPOS GPOS, no ; Matches where last m//g left off.
#* [Special] alternatives:
REG_ANY REG_ANY, no 0 S ; Match any one character (except newline).
SANY REG_ANY, no 0 S ; Match any one character.
CANY REG_ANY, no 0 S ; Match any one byte.
ANYOF ANYOF, sv 0 S ; Match character in (or not in) this class, single char match only
ANYOFV ANYOF, sv 0 V ; Match character in (or not in) this class, can match-multiple chars
ALNUM ALNUM, no 0 S ; Match any alphanumeric character using native charset semantics for non-utf8
ALNUML ALNUM, no 0 S ; Match any alphanumeric char in locale
ALNUMU ALNUM, no 0 S ; Match any alphanumeric char using Unicode semantics
ALNUMA ALNUM, no 0 S ; Match [A-Za-z_0-9]
NALNUM NALNUM, no 0 S ; Match any non-alphanumeric character using native charset semantics for non-utf8
NALNUML NALNUM, no 0 S ; Match any non-alphanumeric char in locale
NALNUMU NALNUM, no 0 S ; Match any non-alphanumeric char using Unicode semantics
NALNUMA NALNUM, no 0 S ; Match [^A-Za-z_0-9]
SPACE SPACE, no 0 S ; Match any whitespace character using native charset semantics for non-utf8
SPACEL SPACE, no 0 S ; Match any whitespace char in locale
SPACEU SPACE, no 0 S ; Match any whitespace char using Unicode semantics
SPACEA SPACE, no 0 S ; Match [ \t\n\f\r]
NSPACE NSPACE, no 0 S ; Match any non-whitespace character using native charset semantics for non-utf8
NSPACEL NSPACE, no 0 S ; Match any non-whitespace char in locale
NSPACEU NSPACE, no 0 S ; Match any non-whitespace char using Unicode semantics
NSPACEA NSPACE, no 0 S ; Match [^ \t\n\f\r]
DIGIT DIGIT, no 0 S ; Match any numeric character using native charset semantics for non-utf8
DIGITL DIGIT, no 0 S ; Match any numeric character in locale
DIGITA DIGIT, no 0 S ; Match [0-9]
NDIGIT NDIGIT, no 0 S ; Match any non-numeric character using native charset semantics for non-utf8
NDIGITL NDIGIT, no 0 S ; Match any non-numeric character in locale
NDIGITA NDIGIT, no 0 S ; Match [^0-9]
CLUMP CLUMP, no 0 V ; Match any extended grapheme cluster sequence
#* Alternation
# BRANCH The set of branches constituting a single choice are hooked
# together with their "next" pointers, since precedence prevents
# anything being concatenated to any individual branch. The
# "next" pointer of the last BRANCH in a choice points to the
# thing following the whole choice. This is also where the
# final "next" pointer of each individual branch points; each
# branch starts with the operand node of a BRANCH node.
#
BRANCH BRANCH, node 0 V ; 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 BACK, no 0 V ; Match "", "next" ptr points backward.
#*Literals
EXACT EXACT, str ; Match this string (preceded by length).
EXACTF EXACT, str ; Match this string, folded, native charset semantics for non-utf8 (prec. by length).
EXACTFL EXACT, str ; Match this string, folded in locale (w/len).
EXACTFU EXACT, str ; Match this string, folded, Unicode semantics for non-utf8 (prec. by length).
#*Do nothing types
NOTHING NOTHING, no ; Match empty string.
# A variant of above which delimits a group, thus stops optimizations
TAIL NOTHING, no ; Match empty string. Can jump here from outside.
#*Loops
# STAR,PLUS '?', and complex '*' and '+', are implemented as circular
# BRANCH structures using BACK. Simple cases (one character
# per match) are implemented with STAR and PLUS for speed
# and to minimize recursive plunges.
#
STAR STAR, node 0 V ; Match this (simple) thing 0 or more times.
PLUS PLUS, node 0 V ; Match this (simple) thing 1 or more times.
CURLY CURLY, sv 2 V ; Match this simple thing {n,m} times.
CURLYN CURLY, no 2 V ; Capture next-after-this simple thing
CURLYM CURLY, no 2 V ; Capture this medium-complex thing {n,m} times.
CURLYX CURLY, sv 2 V ; Match this complex thing {n,m} times.
# This terminator creates a loop structure for CURLYX
WHILEM WHILEM, no 0 V ; Do curly processing and see if rest matches.
#*Buffer related
# OPEN,CLOSE,GROUPP ...are numbered at compile time.
OPEN OPEN, num 1 ; Mark this point in input as start of #n.
CLOSE CLOSE, num 1 ; Analogous to OPEN.
REF REF, num 1 V ; Match some already matched string
REFF REF, num 1 V ; Match already matched string, folded using native charset semantics for non-utf8
REFFL REF, num 1 V ; Match already matched string, folded in loc.
# REFFU and NREFFU could have been implemented using the FLAGS field of the
# regnode, but by having a separate node type, we can use the existing switch
# statement to avoid some tests
REFFU REF, num 1 V ; Match already matched string, folded using unicode semantics for non-utf8
#*Named references. Code in regcomp.c assumes that these all are after the numbered references
NREF REF, no-sv 1 V ; Match some already matched string
NREFF REF, no-sv 1 V ; Match already matched string, folded using native charset semantics for non-utf8
NREFFL REF, no-sv 1 V ; Match already matched string, folded in loc.
NREFFU REF, num 1 V ; Match already matched string, folded using unicode semantics for non-utf8
IFMATCH BRANCHJ, off 1 . 2 ; Succeeds if the following matches.
UNLESSM BRANCHJ, off 1 . 2 ; Fails if the following matches.
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.
#*Support for long RE
LONGJMP LONGJMP, off 1 . 1 ; Jump far away.
BRANCHJ BRANCHJ, off 1 V 1 ; BRANCH with long offset.
#*The heavy worker
EVAL EVAL, evl 1 ; Execute some Perl code.
#*Modifiers
MINMOD MINMOD, no ; Next operator is not greedy.
LOGICAL LOGICAL, no ; Next opcode should set the flag only.
# 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[LU]?)? 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
GOSTART GOSTART, no ; recurse to start of pattern
#*Special conditionals
NGROUPP NGROUPP, no-sv 1 ; Whether the group matched.
INSUBP INSUBP, num 1 ; Whether we are in a specific recurse.
DEFINEP DEFINEP, none 1 ; Never execute directly.
#*Backtracking Verbs
ENDLIKE ENDLIKE, none ; Used only for the type field of verbs
OPFAIL ENDLIKE, none ; Same as (?!)
ACCEPT ENDLIKE, parno 1 ; Accepts the current matched string.
#*Verbs With Arguments
VERB VERB, no-sv 1 ; Used only for the type field of verbs
PRUNE VERB, no-sv 1 ; Pattern fails at this startpoint if no-backtracking through this
MARKPOINT VERB, no-sv 1 ; Push the current location for rollback by cut.
SKIP VERB, no-sv 1 ; On failure skip forward (to the mark) before retrying
COMMIT VERB, no-sv 1 ; Pattern fails outright if backtracking through this
CUTGROUP VERB, no-sv 1 ; On failure go to the next alternation in the group
#*Control what to keep in $&.
KEEPS KEEPS, no ; $& begins here.
#*New charclass like patterns
LNBREAK LNBREAK, none ; generic newline pattern
VERTWS VERTWS, none 0 S ; vertical whitespace (Perl 6)
NVERTWS NVERTWS, none 0 S ; not vertical whitespace (Perl 6)
HORIZWS HORIZWS, none 0 S ; horizontal whitespace (Perl 6)
NHORIZWS NHORIZWS, none 0 S ; not horizontal whitespace (Perl 6)
FOLDCHAR FOLDCHAR, codepoint 1 ; codepoint with tricky case folding properties.
# NEW STUFF SOMEWHERE ABOVE THIS LINE
################################################################################
#*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 NOTHING, 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 PSEUDO, off ; Pseudo opcode for internal use.
-------------------------------------------------------------------------------
# Format for second section:
# REGOP \t typelist [ \t typelist] [# Comment]
# typelist= namelist
# = namelist:FAIL
# = name:count
# Anything below is a state
#
#
TRIE next:FAIL
EVAL AB:FAIL
CURLYX end:FAIL
WHILEM A_pre,A_min,A_max,B_min,B_max:FAIL
BRANCH next:FAIL
CURLYM A,B:FAIL
IFMATCH A:FAIL
CURLY B_min_known,B_min,B_max:FAIL
COMMIT next:FAIL
MARKPOINT next:FAIL
SKIP next:FAIL
CUTGROUP next:FAIL
KEEPS next:FAIL
|
