org.antlr.v4.runtime.atn

Class ConflictInfo

java.lang.Object

org.antlr.v4.runtime.atn.ConflictInfo

public class ConflictInfo
extends Object

This class stores information about a configuration conflict.

Author:

Sam Harwell

Constructor Summary

Constructors

Constructor and Description
ConflictInfo(BitSet conflictedAlts, boolean exact)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
BitSet	getConflictedAlts() Gets the set of conflicting alternatives for the configuration set.
int	hashCode()
boolean	isExact() Gets whether or not the configuration conflict is an exact conflict.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConflictInfo

public ConflictInfo(BitSet conflictedAlts,
                    boolean exact)

Method Detail

getConflictedAlts

public final BitSet getConflictedAlts()

Gets the set of conflicting alternatives for the configuration set.

isExact

public final boolean isExact()

Gets whether or not the configuration conflict is an exact conflict. An exact conflict occurs when the prediction algorithm determines that the represented alternatives for a particular configuration set cannot be further reduced by consuming additional input. After reaching an exact conflict during an SLL prediction, only switch to full-context prediction could reduce the set of viable alternatives. In LL prediction, an exact conflict indicates a true ambiguity in the input.

For the PredictionMode.LL_EXACT_AMBIG_DETECTION prediction mode, accept states are conflicting but not exact are treated as non-accept states.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object