Antlr4.Runtime.Atn.ProfilingATNSimulator.ComputeReachSet C# (CSharp) Method

        protected override ATNConfigSet ComputeReachSet(ATNConfigSet closure, int t, bool fullCtx)
        {
            if (fullCtx)
            {
            // this method is called after each time the input position advances
            // during full context prediction
            llStopIndex = input.Index;
            }

            ATNConfigSet reachConfigs = base.ComputeReachSet(closure, t, fullCtx);
            if (fullCtx)
            {
            decisions[currentDecision].LL_ATNTransitions++; // count computation even if error
            if (reachConfigs != null)
            {
            }
            else { // no reach on current lookahead symbol. ERROR.
                   // TODO: does not handle delayed errors per getSynValidOrSemInvalidAltThatFinishedDecisionEntryRule()
                decisions[currentDecision].errors.Add(
                    new ErrorInfo(currentDecision, null /*closure*/, input, startIndex, llStopIndex)
                );
            }
            }
            else {
            decisions[currentDecision].SLL_ATNTransitions++;
            if (reachConfigs != null)
            {
            }
            else { // no reach on current lookahead symbol. ERROR.
                decisions[currentDecision].errors.Add(
                    new ErrorInfo(currentDecision, null /*closure*/, input, startIndex, sllStopIndex)
                );
            }
            }
            return reachConfigs;
        }