Antlr4.Runtime.Atn.ParserATNSimulator.getAltThatFinishedDecisionEntryRule C# (CSharp) Method

        protected int getAltThatFinishedDecisionEntryRule(ATNConfigSet configSet)
        {
            IntervalSet alts = new IntervalSet();
            foreach (ATNConfig c in configSet.configs)
            {
                if (c.OuterContextDepth > 0 || (c.state is RuleStopState && c.context.HasEmptyPath))
                {
                    alts.Add(c.alt);
                }
            }
            if (alts.Count == 0) return ATN.INVALID_ALT_NUMBER;
            return alts.MinElement;
        }