ANTLR 4 Runtime (Optimized) 4.9.0 · org.antlr.v4.runtime.atn.ConflictInfo

Modifier and Type	Field and Description
private final BitSet	conflictedAlts
private final boolean	exact

Access	Constructor and Description
public	ConflictInfo(BitSet conflictedAlts, boolean exact)

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public final BitSet	getConflictedAlts() Gets the set of conflicting alternatives for the configuration set.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for the object.
public final boolean	isExact() Gets whether or not the configuration conflict is an exact conflict.

conflictedAlts	back to summary
private final BitSet conflictedAlts

exact	back to summary
private final boolean exact

ConflictInfo	back to summary
public ConflictInfo(BitSet conflictedAlts, boolean exact)

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters obj:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise. Annotations @Override

public boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

obj:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations

@Override

getConflictedAlts	back to summary
public final BitSet getConflictedAlts() Gets the set of conflicting alternatives for the configuration set.

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object. Annotations @Override

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int

a hash code value for this object.

Annotations

@Override

isExact back to summary

isExact	back to summary
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.

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.

public Class ConflictInfo

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail