Antlr4.Runtime.Atn.ATNDeserializer.ReadStates C# (CSharp) Method

        protected internal virtual void ReadStates(ATN atn)
        {
            //
            // STATES
            //
            IList<Tuple<LoopEndState, int>> loopBackStateNumbers = new List<Tuple<LoopEndState, int>>();
            IList<Tuple<BlockStartState, int>> endStateNumbers = new List<Tuple<BlockStartState, int>>();
            int nstates = ReadInt();
            for (int i_1 = 0; i_1 < nstates; i_1++)
            {
                StateType stype = (StateType)ReadInt();
                // ignore bad type of states
                if (stype == StateType.InvalidType)
                {
                    atn.AddState(null);
                    continue;
                }
                int ruleIndex = ReadInt();
                if (ruleIndex == char.MaxValue)
                {
                    ruleIndex = -1;
                }
                ATNState s = StateFactory(stype, ruleIndex);
                if (stype == StateType.LoopEnd)
                {
                    // special case
                    int loopBackStateNumber = ReadInt();
                    loopBackStateNumbers.Add(Tuple.Create((LoopEndState)s, loopBackStateNumber));
                }
                else
                {
                    if (s is BlockStartState)
                    {
                        int endStateNumber = ReadInt();
                        endStateNumbers.Add(Tuple.Create((BlockStartState)s, endStateNumber));
                    }
                }
                atn.AddState(s);
            }
            // delay the assignment of loop back and end states until we know all the state instances have been initialized
            foreach (Tuple<LoopEndState, int> pair in loopBackStateNumbers)
            {
                pair.Item1.loopBackState = atn.states[pair.Item2];
            }
            foreach (Tuple<BlockStartState, int> pair_1 in endStateNumbers)
            {
                pair_1.Item1.endState = (BlockEndState)atn.states[pair_1.Item2];
            }
            int numNonGreedyStates = ReadInt();
            for (int i_2 = 0; i_2 < numNonGreedyStates; i_2++)
            {
                int stateNumber = ReadInt();
                ((DecisionState)atn.states[stateNumber]).nonGreedy = true;
            }
            int numPrecedenceStates = ReadInt();
            for (int i_4 = 0; i_4 < numPrecedenceStates; i_4++)
            {
                int stateNumber = ReadInt();
                ((RuleStartState)atn.states[stateNumber]).isPrecedenceRule = true;
            }
        }