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Python3Lexer.py
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469 lines (431 loc) · 23.5 KB
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# Generated from Python3.g4 by ANTLR 4.7.1
from antlr4 import *
from io import StringIO
from typing.io import TextIO
import sys
from Python3Parser import Python3Parser
from antlr4.Token import *
def serializedATN():
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class Python3Lexer(Lexer):
atn = ATNDeserializer().deserialize(serializedATN())
decisionsToDFA = [ DFA(ds, i) for i, ds in enumerate(atn.decisionToState) ]
T__0 = 1
T__1 = 2
T__2 = 3
T__3 = 4
T__4 = 5
T__5 = 6
T__6 = 7
T__7 = 8
T__8 = 9
T__9 = 10
T__10 = 11
T__11 = 12
T__12 = 13
T__13 = 14
T__14 = 15
STRING = 16
NUMBER = 17
DEF = 18
RETURN = 19
IF = 20
ELIF = 21
ELSE = 22
WHILE = 23
FOR = 24
IN = 25
OR = 26
AND = 27
NOT = 28
IS = 29
NONE = 30
TRUE = 31
FALSE = 32
PASS = 33
CONTINUE = 34
BREAK = 35
NEWLINE = 36
NAME = 37
STRING_LITERAL = 38
DECIMAL_INTEGER = 39
DOT = 40
STAR = 41
OPEN_PAREN = 42
CLOSE_PAREN = 43
COMMA = 44
COLON = 45
ASSIGN = 46
OPEN_BRACK = 47
CLOSE_BRACK = 48
OR_OP = 49
XOR = 50
AND_OP = 51
LESS_THAN = 52
GREATER_THAN = 53
EQUALS = 54
GT_EQ = 55
LT_EQ = 56
NOT_EQ = 57
ADD = 58
SUB = 59
DIV = 60
MOD = 61
NOT_OP = 62
POWER = 63
SKIP_ = 64
UNKNOWN_CHAR = 65
channelNames = [ u"DEFAULT_TOKEN_CHANNEL", u"HIDDEN" ]
modeNames = [ "DEFAULT_MODE" ]
literalNames = [ "<INVALID>",
"';'", "'+='", "'-='", "'*='", "'@='", "'/='", "'%='", "'&='",
"'|='", "'^='", "'<<='", "'>>='", "'**='", "'//='", "'->'",
"'def'", "'return'", "'if'", "'elif'", "'else'", "'while'",
"'for'", "'in'", "'or'", "'and'", "'not'", "'is'", "'None'",
"'True'", "'False'", "'pass'", "'continue'", "'break'", "'.'",
"'*'", "'('", "')'", "','", "':'", "'='", "'['", "']'", "'|'",
"'^'", "'&'", "'<'", "'>'", "'=='", "'>='", "'<='", "'!='",
"'+'", "'-'", "'/'", "'%'", "'~'", "'**'" ]
symbolicNames = [ "<INVALID>",
"STRING", "NUMBER", "DEF", "RETURN", "IF", "ELIF", "ELSE", "WHILE",
"FOR", "IN", "OR", "AND", "NOT", "IS", "NONE", "TRUE", "FALSE",
"PASS", "CONTINUE", "BREAK", "NEWLINE", "NAME", "STRING_LITERAL",
"DECIMAL_INTEGER", "DOT", "STAR", "OPEN_PAREN", "CLOSE_PAREN",
"COMMA", "COLON", "ASSIGN", "OPEN_BRACK", "CLOSE_BRACK", "OR_OP",
"XOR", "AND_OP", "LESS_THAN", "GREATER_THAN", "EQUALS", "GT_EQ",
"LT_EQ", "NOT_EQ", "ADD", "SUB", "DIV", "MOD", "NOT_OP", "POWER",
"SKIP_", "UNKNOWN_CHAR" ]
ruleNames = [ "T__0", "T__1", "T__2", "T__3", "T__4", "T__5", "T__6",
"T__7", "T__8", "T__9", "T__10", "T__11", "T__12", "T__13",
"T__14", "STRING", "NUMBER", "DEF", "RETURN", "IF", "ELIF",
"ELSE", "WHILE", "FOR", "IN", "OR", "AND", "NOT", "IS",
"NONE", "TRUE", "FALSE", "PASS", "CONTINUE", "BREAK",
"NEWLINE", "NAME", "STRING_LITERAL", "DECIMAL_INTEGER",
"DOT", "STAR", "OPEN_PAREN", "CLOSE_PAREN", "COMMA", "COLON",
"ASSIGN", "OPEN_BRACK", "CLOSE_BRACK", "OR_OP", "XOR",
"AND_OP", "LESS_THAN", "GREATER_THAN", "EQUALS", "GT_EQ",
"LT_EQ", "NOT_EQ", "ADD", "SUB", "DIV", "MOD", "NOT_OP",
"POWER", "SKIP_", "UNKNOWN_CHAR", "ID_START", "ID_CONTINUE",
"SHORT_STRING", "STRING_NEXTLINE", "SPACES", "COMMENT",
"LINE_JOINING" ]
grammarFileName = "Python3.g4"
def __init__(self, input=None, output:TextIO = sys.stdout):
super().__init__(input, output)
self.checkVersion("4.7.1")
self._interp = LexerATNSimulator(self, self.atn, self.decisionsToDFA, PredictionContextCache())
self._actions = None
self._predicates = None
self.lastToken = None
self.tokens = []
self.indentStack = []
def emit(self,t=None):
if t == None :
s = self._factory.create(self._tokenFactorySourcePair, self._type, self._text, self._channel, self._tokenStartCharIndex,
self.getCharIndex()-1, self._tokenStartLine, self._tokenStartColumn)
self.emitToken(s)
self.tokens.append(s)
return s
else:
self.emitToken(t)
self.tokens.append(t)
return t
def commonToken(self,type,text):
stop = self.getCharIndex()-1
if len(text)==0 :
start = stop
else:
start = stop - len(text)+1
return CommonToken(self._tokenFactorySourcePair,type,self.DEFAULT_TOKEN_CHANNEL,start,stop)
def createDedent(self):
dedent = self.commonToken(Python3Parser.DEDENT,'')
dedent.line = self.lastToken.line
return dedent
@staticmethod
def getIndentationCount(spaces):
count = 0
for ch in spaces:
if ch == '\t':
count +=( 4 - (count%4))
elif ch == ' ':
count += 1
else :
pass
return count
def nextToken(self):
# Check if the end-of-file is ahead and there are still some DEDENTS expected
if(self._input.LA(1)==Token.EOF and len(self.indentStack)!=0):
# Remove ant trailing EOF tokens from our buffer
i = len(self.tokens)-1
while i>= 0 :
if(self.tokens[i].type==Token.EOF):
self.tokens.pop(i)
i-=1
# First emit an extra line break that serves as the end of the stmt
self.emit(self.commonToken(Python3Parser.NEWLINE,'\n'))
# Now emit as much DEDENT tokens as needed
while len(self.indentStack)!=0 :
self.emit(self.createDedent())
self.indentStack.pop()
# put the EOF back on the token stream .
self.emit(self.commonToken(Python3Parser.EOF,'<EOF>'))
next = super().nextToken()
if (next.channel == Token.DEFAULT_CHANNEL):
# Keep track of the last token on the default channel
self.lastToken = next
if len(self.tokens) == 0 :
return next
else :
temp = self.tokens[0]
self.tokens.pop(0)
return temp
def atStartOfInput(self):
if super().getCharIndex()==0 and super().line==1 :
return True
else:
return False
def action(self, localctx:RuleContext, ruleIndex:int, actionIndex:int):
if self._actions is None:
actions = dict()
actions[35] = self.NEWLINE_action
self._actions = actions
action = self._actions.get(ruleIndex, None)
if action is not None:
action(localctx, actionIndex)
else:
raise Exception("No registered action for:" + str(ruleIndex))
def NEWLINE_action(self, localctx:RuleContext , actionIndex:int):
if actionIndex == 0:
newLine = self.text
for i in newLine :
if i == '\r' or i == '\n' or i == '\f':
pass
else:
newLine.replace(str(i),'')
spaces = self.text.replace('\r','')
spaces = self.text.replace('\n','')
spaces = self.text.replace('\f','')
next = self._input.LA(1)
if(next=='\r' or next == '\n' or next == '\f' or next == '<EOF>'):
self.skip()
else:
self.emit(self.commonToken(self.NEWLINE,newLine))
indent = self.getIndentationCount(spaces)
previous = 0
if len(self.indentStack) != 0 :
previous = self.indentStack.pop()
self.indentStack.append(previous)
# it is equal to indentStack.peek()
if indent==previous :
# skip indents of the same size as the present indent-size
self.skip()
elif indent > previous :
self.indentStack.append(indent)
self.emit(self.commonToken(Python3Parser.INDENT,spaces))
else:
# Possibly emit more than 1 DEDENT token
while len(self.indentStack)!=0 and self.indentStack[len(self.indentStack)-1]>indent:
self.emit(self.createDedent())
self.indentStack.pop()
def sempred(self, localctx:RuleContext, ruleIndex:int, predIndex:int):
if self._predicates is None:
preds = dict()
preds[35] = self.NEWLINE_sempred
self._predicates = preds
pred = self._predicates.get(ruleIndex, None)
if pred is not None:
return pred(localctx, predIndex)
else:
raise Exception("No registered predicate for:" + str(ruleIndex))
def NEWLINE_sempred(self, localctx:RuleContext, predIndex:int):
if predIndex == 0:
return self.atStartOfInput()