public virtual IntervalSet Look(ATNState s, ATNState stopState, RuleContext ctx)
{
IntervalSet r = new IntervalSet();
bool seeThruPreds = true;
PredictionContext lookContext = ctx != null ? PredictionContext.FromRuleContext(s.atn, ctx) : null;
Look_(s, stopState, lookContext, r, new HashSet<ATNConfig>(), new BitSet(), seeThruPreds, true);
return r;
}
public static PredictionContext FromRuleContext(ATN atn, RuleContext outerContext)
{
if (outerContext == null)
{
outerContext = ParserRuleContext.EMPTY;
}
if (outerContext.Parent == null || outerContext == ParserRuleContext.EMPTY)
{
return(PredictionContext.EMPTY);
}
PredictionContext parent = PredictionContext.FromRuleContext(atn, outerContext.Parent);
ATNState state = atn.states[outerContext.invokingState];
RuleTransition transition = (RuleTransition)state.Transition(0);
return(parent.GetChild(transition.followState.stateNumber));
}