-
Notifications
You must be signed in to change notification settings - Fork 1
/
ReGexParser.py
300 lines (234 loc) · 10.6 KB
/
ReGexParser.py
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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
# Generated from ReGex.g4 by ANTLR 4.7.2
# encoding: utf-8
from antlr4 import *
from io import StringIO
from typing.io import TextIO
import sys
def serializedATN():
with StringIO() as buf:
buf.write("\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\3\16")
buf.write("&\4\2\t\2\3\2\3\2\3\2\3\2\3\2\3\2\3\2\3\2\3\2\3\2\3\2")
buf.write("\3\2\3\2\3\2\3\2\5\2\24\n\2\3\2\3\2\3\2\3\2\3\2\3\2\3")
buf.write("\2\3\2\3\2\3\2\3\2\7\2!\n\2\f\2\16\2$\13\2\3\2\2\3\2\3")
buf.write("\2\2\2\2/\2\23\3\2\2\2\4\5\b\2\1\2\5\24\7\r\2\2\6\24\7")
buf.write("\13\2\2\7\24\7\f\2\2\b\t\7\3\2\2\t\n\5\2\2\2\n\13\7\4")
buf.write("\2\2\13\f\5\2\2\13\f\24\3\2\2\2\r\16\7\3\2\2\16\17\5\2")
buf.write("\2\2\17\20\7\4\2\2\20\24\3\2\2\2\21\24\7\5\2\2\22\24\7")
buf.write("\6\2\2\23\4\3\2\2\2\23\6\3\2\2\2\23\7\3\2\2\2\23\b\3\2")
buf.write("\2\2\23\r\3\2\2\2\23\21\3\2\2\2\23\22\3\2\2\2\24\"\3\2")
buf.write("\2\2\25\26\f\4\2\2\26!\5\2\2\5\27\30\f\3\2\2\30\31\7\n")
buf.write("\2\2\31!\5\2\2\4\32\33\f\t\2\2\33!\7\7\2\2\34\35\f\b\2")
buf.write("\2\35!\7\b\2\2\36\37\f\7\2\2\37!\7\t\2\2 \25\3\2\2\2 ")
buf.write("\27\3\2\2\2 \32\3\2\2\2 \34\3\2\2\2 \36\3\2\2\2!$\3\2")
buf.write("\2\2\" \3\2\2\2\"#\3\2\2\2#\3\3\2\2\2$\"\3\2\2\2\5\23")
buf.write(" \"")
return buf.getvalue()
class ReGexParser ( Parser ):
grammarFileName = "ReGex.g4"
atn = ATNDeserializer().deserialize(serializedATN())
decisionsToDFA = [ DFA(ds, i) for i, ds in enumerate(atn.decisionToState) ]
sharedContextCache = PredictionContextCache()
literalNames = [ "<INVALID>", "'('", "')'", "<INVALID>", "<INVALID>",
"'*'", "'+'", "'?'", "'|'", "'.'" ]
symbolicNames = [ "<INVALID>", "<INVALID>", "<INVALID>", "SET", "RANGE",
"STAR", "PLUS", "MAYBE", "ALTERNATION", "ANY", "NUMBER",
"CHAR", "WS" ]
RULE_exp = 0
ruleNames = [ "exp" ]
EOF = Token.EOF
T__0=1
T__1=2
SET=3
RANGE=4
STAR=5
PLUS=6
MAYBE=7
ALTERNATION=8
ANY=9
NUMBER=10
CHAR=11
WS=12
def __init__(self, input:TokenStream, output:TextIO = sys.stdout):
super().__init__(input, output)
self.checkVersion("4.7.2")
self._interp = ParserATNSimulator(self, self.atn, self.decisionsToDFA, self.sharedContextCache)
self._predicates = None
class ExpContext(ParserRuleContext):
def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
super().__init__(parent, invokingState)
self.parser = parser
def CHAR(self):
return self.getToken(ReGexParser.CHAR, 0)
def ANY(self):
return self.getToken(ReGexParser.ANY, 0)
def NUMBER(self):
return self.getToken(ReGexParser.NUMBER, 0)
def exp(self, i:int=None):
if i is None:
return self.getTypedRuleContexts(ReGexParser.ExpContext)
else:
return self.getTypedRuleContext(ReGexParser.ExpContext,i)
def SET(self):
return self.getToken(ReGexParser.SET, 0)
def RANGE(self):
return self.getToken(ReGexParser.RANGE, 0)
def ALTERNATION(self):
return self.getToken(ReGexParser.ALTERNATION, 0)
def STAR(self):
return self.getToken(ReGexParser.STAR, 0)
def PLUS(self):
return self.getToken(ReGexParser.PLUS, 0)
def MAYBE(self):
return self.getToken(ReGexParser.MAYBE, 0)
def getRuleIndex(self):
return ReGexParser.RULE_exp
def enterRule(self, listener:ParseTreeListener):
if hasattr( listener, "enterExp" ):
listener.enterExp(self)
def exitRule(self, listener:ParseTreeListener):
if hasattr( listener, "exitExp" ):
listener.exitExp(self)
def exp(self, _p:int=0):
_parentctx = self._ctx
_parentState = self.state
localctx = ReGexParser.ExpContext(self, self._ctx, _parentState)
_prevctx = localctx
_startState = 0
self.enterRecursionRule(localctx, 0, self.RULE_exp, _p)
try:
self.enterOuterAlt(localctx, 1)
self.state = 17
self._errHandler.sync(self)
la_ = self._interp.adaptivePredict(self._input,0,self._ctx)
if la_ == 1:
self.state = 3
self.match(ReGexParser.CHAR)
pass
elif la_ == 2:
self.state = 4
self.match(ReGexParser.ANY)
pass
elif la_ == 3:
self.state = 5
self.match(ReGexParser.NUMBER)
pass
elif la_ == 4:
self.state = 6
self.match(ReGexParser.T__0)
self.state = 7
self.exp(0)
self.state = 8
self.match(ReGexParser.T__1)
self.state = 9
self.exp(9)
pass
elif la_ == 5:
self.state = 11
self.match(ReGexParser.T__0)
self.state = 12
self.exp(0)
self.state = 13
self.match(ReGexParser.T__1)
pass
elif la_ == 6:
self.state = 15
self.match(ReGexParser.SET)
pass
elif la_ == 7:
self.state = 16
self.match(ReGexParser.RANGE)
pass
self._ctx.stop = self._input.LT(-1)
self.state = 32
self._errHandler.sync(self)
_alt = self._interp.adaptivePredict(self._input,2,self._ctx)
while _alt!=2 and _alt!=ATN.INVALID_ALT_NUMBER:
if _alt==1:
if self._parseListeners is not None:
self.triggerExitRuleEvent()
_prevctx = localctx
self.state = 30
self._errHandler.sync(self)
la_ = self._interp.adaptivePredict(self._input,1,self._ctx)
if la_ == 1:
localctx = ReGexParser.ExpContext(self, _parentctx, _parentState)
self.pushNewRecursionContext(localctx, _startState, self.RULE_exp)
self.state = 19
if not self.precpred(self._ctx, 2):
from antlr4.error.Errors import FailedPredicateException
raise FailedPredicateException(self, "self.precpred(self._ctx, 2)")
self.state = 20
self.exp(3)
pass
elif la_ == 2:
localctx = ReGexParser.ExpContext(self, _parentctx, _parentState)
self.pushNewRecursionContext(localctx, _startState, self.RULE_exp)
self.state = 21
if not self.precpred(self._ctx, 1):
from antlr4.error.Errors import FailedPredicateException
raise FailedPredicateException(self, "self.precpred(self._ctx, 1)")
self.state = 22
self.match(ReGexParser.ALTERNATION)
self.state = 23
self.exp(2)
pass
elif la_ == 3:
localctx = ReGexParser.ExpContext(self, _parentctx, _parentState)
self.pushNewRecursionContext(localctx, _startState, self.RULE_exp)
self.state = 24
if not self.precpred(self._ctx, 7):
from antlr4.error.Errors import FailedPredicateException
raise FailedPredicateException(self, "self.precpred(self._ctx, 7)")
self.state = 25
self.match(ReGexParser.STAR)
pass
elif la_ == 4:
localctx = ReGexParser.ExpContext(self, _parentctx, _parentState)
self.pushNewRecursionContext(localctx, _startState, self.RULE_exp)
self.state = 26
if not self.precpred(self._ctx, 6):
from antlr4.error.Errors import FailedPredicateException
raise FailedPredicateException(self, "self.precpred(self._ctx, 6)")
self.state = 27
self.match(ReGexParser.PLUS)
pass
elif la_ == 5:
localctx = ReGexParser.ExpContext(self, _parentctx, _parentState)
self.pushNewRecursionContext(localctx, _startState, self.RULE_exp)
self.state = 28
if not self.precpred(self._ctx, 5):
from antlr4.error.Errors import FailedPredicateException
raise FailedPredicateException(self, "self.precpred(self._ctx, 5)")
self.state = 29
self.match(ReGexParser.MAYBE)
pass
self.state = 34
self._errHandler.sync(self)
_alt = self._interp.adaptivePredict(self._input,2,self._ctx)
except RecognitionException as re:
localctx.exception = re
self._errHandler.reportError(self, re)
self._errHandler.recover(self, re)
finally:
self.unrollRecursionContexts(_parentctx)
return localctx
def sempred(self, localctx:RuleContext, ruleIndex:int, predIndex:int):
if self._predicates == None:
self._predicates = dict()
self._predicates[0] = self.exp_sempred
pred = self._predicates.get(ruleIndex, None)
if pred is None:
raise Exception("No predicate with index:" + str(ruleIndex))
else:
return pred(localctx, predIndex)
def exp_sempred(self, localctx:ExpContext, predIndex:int):
if predIndex == 0:
return self.precpred(self._ctx, 2)
if predIndex == 1:
return self.precpred(self._ctx, 1)
if predIndex == 2:
return self.precpred(self._ctx, 7)
if predIndex == 3:
return self.precpred(self._ctx, 6)
if predIndex == 4:
return self.precpred(self._ctx, 5)