org.antlr.v4.runtime.atn

Class ContextSensitivityInfo

java.lang.Object

org.antlr.v4.runtime.atn.DecisionEventInfo

org.antlr.v4.runtime.atn.ContextSensitivityInfo

public class ContextSensitivityInfo
extends DecisionEventInfo

This class represents profiling event information for a context sensitivity. Context sensitivities are decisions where a particular input resulted in an SLL conflict, but LL prediction produced a single unique alternative.

In some cases, the unique alternative identified by LL prediction is not equal to the minimum represented alternative in the conflicting SLL configuration set. Grammars and inputs which result in this scenario are unable to use PredictionMode.SLL, which in turn means they cannot use the two-stage parsing strategy to improve parsing performance for that input.

Since:

4.3

See Also:

ParserATNSimulator.reportContextSensitivity(org.antlr.v4.runtime.dfa.DFA, int, org.antlr.v4.runtime.atn.ATNConfigSet, int, int), ANTLRErrorListener.reportContextSensitivity(org.antlr.v4.runtime.Parser, org.antlr.v4.runtime.dfa.DFA, int, int, int, org.antlr.v4.runtime.atn.ATNConfigSet)

Field Summary

Fields inherited from class org.antlr.v4.runtime.atn.DecisionEventInfo

configs, decision, fullCtx, input, startIndex, stopIndex

Constructor Summary

Constructors

Constructor and Description
ContextSensitivityInfo(int decision, ATNConfigSet configs, TokenStream input, int startIndex, int stopIndex) Constructs a new instance of the ContextSensitivityInfo class with the specified detailed context sensitivity information.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContextSensitivityInfo

public ContextSensitivityInfo(int decision,
                      ATNConfigSet configs,
                      TokenStream input,
                      int startIndex,
                      int stopIndex)

Constructs a new instance of the ContextSensitivityInfo class with the specified detailed context sensitivity information.

Parameters:

decision - The decision number

configs - The final configuration set containing the unique alternative identified by full-context prediction

input - The input token stream

startIndex - The start index for the current prediction

stopIndex - The index at which the context sensitivity was identified during full-context prediction