Example #1
0
        protected internal virtual void ReadEdges(ATN atn, IList <IntervalSet> sets)
        {
            //
            // EDGES
            //
            int nedges = ReadInt();

            for (int i_9 = 0; i_9 < nedges; i_9++)
            {
                int            src      = ReadInt();
                int            trg      = ReadInt();
                TransitionType ttype    = (TransitionType)ReadInt();
                int            arg1     = ReadInt();
                int            arg2     = ReadInt();
                int            arg3     = ReadInt();
                Transition     trans    = EdgeFactory(atn, ttype, src, trg, arg1, arg2, arg3, sets);
                ATNState       srcState = atn.states[src];
                srcState.AddTransition(trans);
            }
            // edges for rule stop states can be derived, so they aren't serialized
            foreach (ATNState state_1 in atn.states)
            {
                for (int i_10 = 0; i_10 < state_1.NumberOfTransitions; i_10++)
                {
                    Transition t = state_1.Transition(i_10);
                    if (!(t is RuleTransition))
                    {
                        continue;
                    }
                    RuleTransition ruleTransition            = (RuleTransition)t;
                    int            outermostPrecedenceReturn = -1;
                    if (atn.ruleToStartState[ruleTransition.target.ruleIndex].isPrecedenceRule)
                    {
                        if (ruleTransition.precedence == 0)
                        {
                            outermostPrecedenceReturn = ruleTransition.target.ruleIndex;
                        }
                    }
                    EpsilonTransition returnTransition = new EpsilonTransition(ruleTransition.followState, outermostPrecedenceReturn);
                    atn.ruleToStopState[ruleTransition.target.ruleIndex].AddTransition(returnTransition);
                }
            }
            foreach (ATNState state_2 in atn.states)
            {
                if (state_2 is BlockStartState)
                {
                    // we need to know the end state to set its start state
                    if (((BlockStartState)state_2).endState == null)
                    {
                        throw new InvalidOperationException();
                    }
                    // block end states can only be associated to a single block start state
                    if (((BlockStartState)state_2).endState.startState != null)
                    {
                        throw new InvalidOperationException();
                    }
                    ((BlockStartState)state_2).endState.startState = (BlockStartState)state_2;
                }
                else if (state_2 is PlusLoopbackState)
                {
                    PlusLoopbackState loopbackState = (PlusLoopbackState)state_2;
                    for (int i_10 = 0; i_10 < loopbackState.NumberOfTransitions; i_10++)
                    {
                        ATNState target = loopbackState.Transition(i_10).target;
                        if (target is PlusBlockStartState)
                        {
                            ((PlusBlockStartState)target).loopBackState = loopbackState;
                        }
                    }
                }
                else if (state_2 is StarLoopbackState)
                {
                    StarLoopbackState loopbackState = (StarLoopbackState)state_2;
                    for (int i_10 = 0; i_10 < loopbackState.NumberOfTransitions; i_10++)
                    {
                        ATNState target = loopbackState.Transition(i_10).target;
                        if (target is StarLoopEntryState)
                        {
                            ((StarLoopEntryState)target).loopBackState = loopbackState;
                        }
                    }
                }
            }
        }
Example #2
0
        protected internal virtual ATNState StateFactory(StateType type, int ruleIndex)
        {
            ATNState s;

            switch (type)
            {
            case StateType.InvalidType:
            {
                return(null);
            }

            case StateType.Basic:
            {
                s = new BasicState();
                break;
            }

            case StateType.RuleStart:
            {
                s = new RuleStartState();
                break;
            }

            case StateType.BlockStart:
            {
                s = new BasicBlockStartState();
                break;
            }

            case StateType.PlusBlockStart:
            {
                s = new PlusBlockStartState();
                break;
            }

            case StateType.StarBlockStart:
            {
                s = new StarBlockStartState();
                break;
            }

            case StateType.TokenStart:
            {
                s = new TokensStartState();
                break;
            }

            case StateType.RuleStop:
            {
                s = new RuleStopState();
                break;
            }

            case StateType.BlockEnd:
            {
                s = new BlockEndState();
                break;
            }

            case StateType.StarLoopBack:
            {
                s = new StarLoopbackState();
                break;
            }

            case StateType.StarLoopEntry:
            {
                s = new StarLoopEntryState();
                break;
            }

            case StateType.PlusLoopBack:
            {
                s = new PlusLoopbackState();
                break;
            }

            case StateType.LoopEnd:
            {
                s = new LoopEndState();
                break;
            }

            default:
            {
                string message = string.Format(CultureInfo.CurrentCulture, "The specified state type {0} is not valid.", type);
                throw new ArgumentException(message);
            }
            }
            s.ruleIndex = ruleIndex;
            return(s);
        }