add NFA parser

grammar NFA_grammar;

/* Parser Rules */

start:       init production* final;

init:        INIT EQUALS statename;

production:  LEFT_PARENTHESIS statename COMMA statename RIGHT_PARENTHESIS EQUALS stateset;

stateset:    LEFT_BRACKET (statename (COMMA statename)* | ) RIGHT_BRACKET;

final:       FINAL EQUALS stateset;

statename:   STATE;

/* Lexer Rules */

/* Tokens */

INIT              : 'init';

EQUALS            : '=';

LEFT_PARENTHESIS  : '(';

RIGHT_PARENTHESIS : ')';

LEFT_BRACKET      : '{';

RIGHT_BRACKET     : '}';

COMMA             : ',';

FINAL             : ('final' | 'F');

STATE             : [a-zA-Z0-9]+;

/* Characters to be ignored */

WS : [ \r\t\n]+ -> skip ;

token literal names:

null

'init'

'='

'('

')'

'{'

'}'

','

null

null

null

token symbolic names:

null

INIT

EQUALS

LEFT_PARENTHESIS

RIGHT_PARENTHESIS

LEFT_BRACKET

RIGHT_BRACKET

COMMA

FINAL

STATE

WS

rule names:

start

init

production

stateset

final

statename

atn:

[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 12, 56, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 3, 2, 3, 2, 7, 2, 17, 10, 2, 12, 2, 14, 2, 20, 11, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 3, 5, 7, 5, 40, 10, 5, 12, 5, 14, 5, 43, 11, 5, 3, 5, 5, 5, 46, 10, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 6, 3, 7, 3, 7, 3, 7, 2, 2, 8, 2, 4, 6, 8, 10, 12, 2, 2, 2, 52, 2, 14, 3, 2, 2, 2, 4, 23, 3, 2, 2, 2, 6, 27, 3, 2, 2, 2, 8, 35, 3, 2, 2, 2, 10, 49, 3, 2, 2, 2, 12, 53, 3, 2, 2, 2, 14, 18, 5, 4, 3, 2, 15, 17, 5, 6, 4, 2, 16, 15, 3, 2, 2, 2, 17, 20, 3, 2, 2, 2, 18, 16, 3, 2, 2, 2, 18, 19, 3, 2, 2, 2, 19, 21, 3, 2, 2, 2, 20, 18, 3, 2, 2, 2, 21, 22, 5, 10, 6, 2, 22, 3, 3, 2, 2, 2, 23, 24, 7, 3, 2, 2, 24, 25, 7, 4, 2, 2, 25, 26, 5, 12, 7, 2, 26, 5, 3, 2, 2, 2, 27, 28, 7, 5, 2, 2, 28, 29, 5, 12, 7, 2, 29, 30, 7, 9, 2, 2, 30, 31, 5, 12, 7, 2, 31, 32, 7, 6, 2, 2, 32, 33, 7, 4, 2, 2, 33, 34, 5, 8, 5, 2, 34, 7, 3, 2, 2, 2, 35, 45, 7, 7, 2, 2, 36, 41, 5, 12, 7, 2, 37, 38, 7, 9, 2, 2, 38, 40, 5, 12, 7, 2, 39, 37, 3, 2, 2, 2, 40, 43, 3, 2, 2, 2, 41, 39, 3, 2, 2, 2, 41, 42, 3, 2, 2, 2, 42, 46, 3, 2, 2, 2, 43, 41, 3, 2, 2, 2, 44, 46, 3, 2, 2, 2, 45, 36, 3, 2, 2, 2, 45, 44, 3, 2, 2, 2, 46, 47, 3, 2, 2, 2, 47, 48, 7, 8, 2, 2, 48, 9, 3, 2, 2, 2, 49, 50, 7, 10, 2, 2, 50, 51, 7, 4, 2, 2, 51, 52, 5, 8, 5, 2, 52, 11, 3, 2, 2, 2, 53, 54, 7, 11, 2, 2, 54, 13, 3, 2, 2, 2, 5, 18, 41, 45]

 No newline at end of file

INIT=1

EQUALS=2

LEFT_PARENTHESIS=3

RIGHT_PARENTHESIS=4

LEFT_BRACKET=5

RIGHT_BRACKET=6

COMMA=7

FINAL=8

STATE=9

WS=10

'init'=1

'='=2

'('=3

')'=4

'{'=5

'}'=6

','=7

token literal names:

null

'init'

'='

'('

')'

'{'

'}'

','

null

null

null

token symbolic names:

null

INIT

EQUALS

LEFT_PARENTHESIS

RIGHT_PARENTHESIS

LEFT_BRACKET

RIGHT_BRACKET

COMMA

FINAL

STATE

WS

rule names:

INIT

EQUALS

LEFT_PARENTHESIS

RIGHT_PARENTHESIS

LEFT_BRACKET

RIGHT_BRACKET

COMMA

FINAL

STATE

WS

channel names:

DEFAULT_TOKEN_CHANNEL

HIDDEN

mode names:

DEFAULT_MODE

atn:

[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 12, 60, 8, 1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 3, 3, 3, 3, 4, 3, 4, 3, 5, 3, 5, 3, 6, 3, 6, 3, 7, 3, 7, 3, 8, 3, 8, 3, 9, 3, 9, 3, 9, 3, 9, 3, 9, 3, 9, 5, 9, 47, 10, 9, 3, 10, 6, 10, 50, 10, 10, 13, 10, 14, 10, 51, 3, 11, 6, 11, 55, 10, 11, 13, 11, 14, 11, 56, 3, 11, 3, 11, 2, 2, 12, 3, 3, 5, 4, 7, 5, 9, 6, 11, 7, 13, 8, 15, 9, 17, 10, 19, 11, 21, 12, 3, 2, 4, 5, 2, 50, 59, 67, 92, 99, 124, 5, 2, 11, 12, 15, 15, 34, 34, 2, 62, 2, 3, 3, 2, 2, 2, 2, 5, 3, 2, 2, 2, 2, 7, 3, 2, 2, 2, 2, 9, 3, 2, 2, 2, 2, 11, 3, 2, 2, 2, 2, 13, 3, 2, 2, 2, 2, 15, 3, 2, 2, 2, 2, 17, 3, 2, 2, 2, 2, 19, 3, 2, 2, 2, 2, 21, 3, 2, 2, 2, 3, 23, 3, 2, 2, 2, 5, 28, 3, 2, 2, 2, 7, 30, 3, 2, 2, 2, 9, 32, 3, 2, 2, 2, 11, 34, 3, 2, 2, 2, 13, 36, 3, 2, 2, 2, 15, 38, 3, 2, 2, 2, 17, 46, 3, 2, 2, 2, 19, 49, 3, 2, 2, 2, 21, 54, 3, 2, 2, 2, 23, 24, 7, 107, 2, 2, 24, 25, 7, 112, 2, 2, 25, 26, 7, 107, 2, 2, 26, 27, 7, 118, 2, 2, 27, 4, 3, 2, 2, 2, 28, 29, 7, 63, 2, 2, 29, 6, 3, 2, 2, 2, 30, 31, 7, 42, 2, 2, 31, 8, 3, 2, 2, 2, 32, 33, 7, 43, 2, 2, 33, 10, 3, 2, 2, 2, 34, 35, 7, 125, 2, 2, 35, 12, 3, 2, 2, 2, 36, 37, 7, 127, 2, 2, 37, 14, 3, 2, 2, 2, 38, 39, 7, 46, 2, 2, 39, 16, 3, 2, 2, 2, 40, 41, 7, 104, 2, 2, 41, 42, 7, 107, 2, 2, 42, 43, 7, 112, 2, 2, 43, 44, 7, 99, 2, 2, 44, 47, 7, 110, 2, 2, 45, 47, 7, 72, 2, 2, 46, 40, 3, 2, 2, 2, 46, 45, 3, 2, 2, 2, 47, 18, 3, 2, 2, 2, 48, 50, 9, 2, 2, 2, 49, 48, 3, 2, 2, 2, 50, 51, 3, 2, 2, 2, 51, 49, 3, 2, 2, 2, 51, 52, 3, 2, 2, 2, 52, 20, 3, 2, 2, 2, 53, 55, 9, 3, 2, 2, 54, 53, 3, 2, 2, 2, 55, 56, 3, 2, 2, 2, 56, 54, 3, 2, 2, 2, 56, 57, 3, 2, 2, 2, 57, 58, 3, 2, 2, 2, 58, 59, 8, 11, 2, 2, 59, 22, 3, 2, 2, 2, 6, 2, 46, 51, 56, 3, 8, 2, 2]

 No newline at end of file

# Generated from NFA_grammar.g4 by ANTLR 4.8

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\2\f")

        buf.write("<\b\1\4\2\t\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7")

        buf.write("\4\b\t\b\4\t\t\t\4\n\t\n\4\13\t\13\3\2\3\2\3\2\3\2\3\2")

        buf.write("\3\3\3\3\3\4\3\4\3\5\3\5\3\6\3\6\3\7\3\7\3\b\3\b\3\t\3")

        buf.write("\t\3\t\3\t\3\t\3\t\5\t/\n\t\3\n\6\n\62\n\n\r\n\16\n\63")

        buf.write("\3\13\6\13\67\n\13\r\13\16\138\3\13\3\13\2\2\f\3\3\5\4")

        buf.write("\7\5\t\6\13\7\r\b\17\t\21\n\23\13\25\f\3\2\4\5\2\62;C")

        buf.write("\\c|\5\2\13\f\17\17\"\"\2>\2\3\3\2\2\2\2\5\3\2\2\2\2\7")

        buf.write("\3\2\2\2\2\t\3\2\2\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2")

        buf.write("\2\2\2\21\3\2\2\2\2\23\3\2\2\2\2\25\3\2\2\2\3\27\3\2\2")

        buf.write("\2\5\34\3\2\2\2\7\36\3\2\2\2\t \3\2\2\2\13\"\3\2\2\2\r")

        buf.write("$\3\2\2\2\17&\3\2\2\2\21.\3\2\2\2\23\61\3\2\2\2\25\66")

        buf.write("\3\2\2\2\27\30\7k\2\2\30\31\7p\2\2\31\32\7k\2\2\32\33")

        buf.write("\7v\2\2\33\4\3\2\2\2\34\35\7?\2\2\35\6\3\2\2\2\36\37\7")

        buf.write("*\2\2\37\b\3\2\2\2 !\7+\2\2!\n\3\2\2\2\"#\7}\2\2#\f\3")

        buf.write("\2\2\2$%\7\177\2\2%\16\3\2\2\2&\'\7.\2\2\'\20\3\2\2\2")

        buf.write("()\7h\2\2)*\7k\2\2*+\7p\2\2+,\7c\2\2,/\7n\2\2-/\7H\2\2")

        buf.write(".(\3\2\2\2.-\3\2\2\2/\22\3\2\2\2\60\62\t\2\2\2\61\60\3")

        buf.write("\2\2\2\62\63\3\2\2\2\63\61\3\2\2\2\63\64\3\2\2\2\64\24")

        buf.write("\3\2\2\2\65\67\t\3\2\2\66\65\3\2\2\2\678\3\2\2\28\66\3")

        buf.write("\2\2\289\3\2\2\29:\3\2\2\2:;\b\13\2\2;\26\3\2\2\2\6\2")

        buf.write(".\638\3\b\2\2")

        return buf.getvalue()

class NFA_grammarLexer(Lexer):

    atn = ATNDeserializer().deserialize(serializedATN())

    decisionsToDFA = [ DFA(ds, i) for i, ds in enumerate(atn.decisionToState) ]

    INIT = 1

    EQUALS = 2

    LEFT_PARENTHESIS = 3

    RIGHT_PARENTHESIS = 4

    LEFT_BRACKET = 5

    RIGHT_BRACKET = 6

    COMMA = 7

    FINAL = 8

    STATE = 9

    WS = 10

    channelNames = [ u"DEFAULT_TOKEN_CHANNEL", u"HIDDEN" ]

    modeNames = [ "DEFAULT_MODE" ]

    literalNames = [ "<INVALID>",

            "'init'", "'='", "'('", "')'", "'{'", "'}'", "','" ]

    symbolicNames = [ "<INVALID>",

            "INIT", "EQUALS", "LEFT_PARENTHESIS", "RIGHT_PARENTHESIS", "LEFT_BRACKET", 

            "RIGHT_BRACKET", "COMMA", "FINAL", "STATE", "WS" ]

    ruleNames = [ "INIT", "EQUALS", "LEFT_PARENTHESIS", "RIGHT_PARENTHESIS", 

                  "LEFT_BRACKET", "RIGHT_BRACKET", "COMMA", "FINAL", "STATE", 

                  "WS" ]

    grammarFileName = "NFA_grammar.g4"

    def __init__(self, input=None, output:TextIO = sys.stdout):

        super().__init__(input, output)

        self.checkVersion("4.8")

        self._interp = LexerATNSimulator(self, self.atn, self.decisionsToDFA, PredictionContextCache())

        self._actions = None

        self._predicates = None