ANTLR 4 Runtime 4.13.1 · org.antlr.v4.runtime.atn.DecisionInfo

Field Summary

Modifier and Type	Field and Description
public final List<AmbiguityInfo>	ambiguities A collection of `AmbiguityInfo` instances describing the ambiguities encountered during LL prediction for this decision.
public final List<ContextSensitivityInfo>	contextSensitivities A collection of `ContextSensitivityInfo` instances describing the context sensitivities encountered during LL prediction for this decision.
public final int	decision The decision number, which is an index into `ATN#decisionToState`.
public final List<ErrorInfo>	errors A collection of `ErrorInfo` instances describing the parse errors identified during calls to `ParserATNSimulator#adaptivePredict` for this decision.
public long	invocations The total number of times `ParserATNSimulator#adaptivePredict` was invoked for this decision.
public long	LL_ATNTransitions The total number of ATN transitions required during LL prediction for this decision.
public long	LL_DFATransitions The total number of DFA transitions required during LL prediction for this decision.
public long	LL_Fallback Gets the total number of times SLL prediction completed in a conflict state, resulting in fallback to LL prediction.
public long	LL_MaxLook Gets the maximum lookahead required for any single LL prediction to complete for this decision.
public LookaheadEventInfo	LL_MaxLookEvent Gets the `LookaheadEventInfo` associated with the event where the `LL_MaxLook` value was set.
public long	LL_MinLook Gets the minimum lookahead required for any single LL prediction to complete for this decision.
public long	LL_TotalLook The sum of the lookahead required for LL prediction for this decision.
public final List<PredicateEvalInfo>	predicateEvals A collection of `PredicateEvalInfo` instances describing the results of evaluating individual predicates during prediction for this decision.
public long	SLL_ATNTransitions The total number of ATN transitions required during SLL prediction for this decision.
public long	SLL_DFATransitions The total number of DFA transitions required during SLL prediction for this decision.
public long	SLL_MaxLook Gets the maximum lookahead required for any single SLL prediction to complete for this decision, by reaching a unique prediction, reaching an SLL conflict state, or encountering a syntax error.
public LookaheadEventInfo	SLL_MaxLookEvent Gets the `LookaheadEventInfo` associated with the event where the `SLL_MaxLook` value was set.
public long	SLL_MinLook Gets the minimum lookahead required for any single SLL prediction to complete for this decision, by reaching a unique prediction, reaching an SLL conflict state, or encountering a syntax error.
public long	SLL_TotalLook The sum of the lookahead required for SLL prediction for this decision.
public long	timeInPrediction The total time spent in `ParserATNSimulator#adaptivePredict` for this decision, in nanoseconds.

Access	Constructor and Description
public	DecisionInfo(int The decision number decision) Constructs a new instance of the `DecisionInfo` class to contain statistics for a particular decision.

Modifier and Type	Method and Description
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Field Detail

ambiguities back to summary

ambiguities	back to summary
public final List<AmbiguityInfo> ambiguities A collection of `AmbiguityInfo` instances describing the ambiguities encountered during LL prediction for this decision. See Also `AmbiguityInfo`

public final List<AmbiguityInfo> ambiguities

A collection of AmbiguityInfo instances describing the ambiguities encountered during LL prediction for this decision.

See Also: AmbiguityInfo

contextSensitivities back to summary

contextSensitivities	back to summary
public final List<ContextSensitivityInfo> contextSensitivities A collection of `ContextSensitivityInfo` instances describing the context sensitivities encountered during LL prediction for this decision. See Also `ContextSensitivityInfo`

public final List<ContextSensitivityInfo> contextSensitivities

A collection of ContextSensitivityInfo instances describing the context sensitivities encountered during LL prediction for this decision.

See Also: ContextSensitivityInfo

decision	back to summary
public final int decision The decision number, which is an index into `ATN#decisionToState`.

errors back to summary

errors	back to summary
public final List<ErrorInfo> errors A collection of `ErrorInfo` instances describing the parse errors identified during calls to `ParserATNSimulator#adaptivePredict` for this decision. See Also `ErrorInfo`

public final List<ErrorInfo> errors

A collection of ErrorInfo instances describing the parse errors identified during calls to ParserATNSimulator#adaptivePredict for this decision.

See Also: ErrorInfo

invocations	back to summary
public long invocations The total number of times `ParserATNSimulator#adaptivePredict` was invoked for this decision.

LL_ATNTransitions back to summary

LL_ATNTransitions	back to summary
public long LL_ATNTransitions The total number of ATN transitions required during LL prediction for this decision. An ATN transition is determined by the number of times the DFA does not contain an edge that is required for prediction, resulting in on-the-fly computation of that edge. If DFA caching of LL transitions is employed by the implementation, ATN computation may cache the computed edge for efficient lookup during future parsing of this decision. Otherwise, the LL parsing algorithm will use ATN transitions exclusively. See Also `LL_DFATransitions`, `ParserATNSimulator#computeTargetState`, `LexerATNSimulator#computeTargetState`

public long LL_ATNTransitions

The total number of ATN transitions required during LL prediction for this decision. An ATN transition is determined by the number of times the DFA does not contain an edge that is required for prediction, resulting in on-the-fly computation of that edge.

If DFA caching of LL transitions is employed by the implementation, ATN computation may cache the computed edge for efficient lookup during future parsing of this decision. Otherwise, the LL parsing algorithm will use ATN transitions exclusively.

See Also: LL_DFATransitions, ParserATNSimulator#computeTargetState, LexerATNSimulator#computeTargetState

LL_DFATransitions back to summary

LL_DFATransitions	back to summary
public long LL_DFATransitions The total number of DFA transitions required during LL prediction for this decision. If the ATN simulator implementation does not use DFA caching for LL transitions, this value will be 0. See Also `ParserATNSimulator#getExistingTargetState`, `LexerATNSimulator#getExistingTargetState`

public long LL_DFATransitions

The total number of DFA transitions required during LL prediction for this decision.

If the ATN simulator implementation does not use DFA caching for LL transitions, this value will be 0.

See Also: ParserATNSimulator#getExistingTargetState, LexerATNSimulator#getExistingTargetState

LL_Fallback back to summary

LL_Fallback	back to summary
public long LL_Fallback Gets the total number of times SLL prediction completed in a conflict state, resulting in fallback to LL prediction. Note that this value is not related to whether or not `PredictionMode#SLL` may be used successfully with a particular grammar. If the ambiguity resolution algorithm applied to the SLL conflicts for this decision produce the same result as LL prediction for this decision, `PredictionMode#SLL` would produce the same overall parsing result as `PredictionMode#LL`.

public long LL_Fallback

Gets the total number of times SLL prediction completed in a conflict state, resulting in fallback to LL prediction.

Note that this value is not related to whether or not PredictionMode#SLL may be used successfully with a particular grammar. If the ambiguity resolution algorithm applied to the SLL conflicts for this decision produce the same result as LL prediction for this decision, PredictionMode#SLL would produce the same overall parsing result as PredictionMode#LL.

LL_MaxLook	back to summary
public long LL_MaxLook Gets the maximum lookahead required for any single LL prediction to complete for this decision. An LL prediction completes when the algorithm reaches a unique prediction, a conflict state (for `PredictionMode#LL`, an ambiguity state (for `PredictionMode#LL_EXACT_AMBIG_DETECTION`, or a syntax error.

LL_MaxLookEvent	back to summary
public LookaheadEventInfo LL_MaxLookEvent Gets the `LookaheadEventInfo` associated with the event where the `LL_MaxLook` value was set.

LL_MinLook	back to summary
public long LL_MinLook Gets the minimum lookahead required for any single LL prediction to complete for this decision. An LL prediction completes when the algorithm reaches a unique prediction, a conflict state (for `PredictionMode#LL`, an ambiguity state (for `PredictionMode#LL_EXACT_AMBIG_DETECTION`, or a syntax error.

LL_TotalLook	back to summary
public long LL_TotalLook The sum of the lookahead required for LL prediction for this decision. Note that LL prediction is only used when SLL prediction reaches a conflict state.

predicateEvals back to summary

predicateEvals	back to summary
public final List<PredicateEvalInfo> predicateEvals A collection of `PredicateEvalInfo` instances describing the results of evaluating individual predicates during prediction for this decision. See Also `PredicateEvalInfo`

public final List<PredicateEvalInfo> predicateEvals

A collection of PredicateEvalInfo instances describing the results of evaluating individual predicates during prediction for this decision.

See Also: PredicateEvalInfo

SLL_ATNTransitions back to summary

SLL_ATNTransitions	back to summary
public long SLL_ATNTransitions The total number of ATN transitions required during SLL prediction for this decision. An ATN transition is determined by the number of times the DFA does not contain an edge that is required for prediction, resulting in on-the-fly computation of that edge. If DFA caching of SLL transitions is employed by the implementation, ATN computation may cache the computed edge for efficient lookup during future parsing of this decision. Otherwise, the SLL parsing algorithm will use ATN transitions exclusively. See Also `SLL_ATNTransitions`, `ParserATNSimulator#computeTargetState`, `LexerATNSimulator#computeTargetState`

public long SLL_ATNTransitions

The total number of ATN transitions required during SLL prediction for this decision. An ATN transition is determined by the number of times the DFA does not contain an edge that is required for prediction, resulting in on-the-fly computation of that edge.

If DFA caching of SLL transitions is employed by the implementation, ATN computation may cache the computed edge for efficient lookup during future parsing of this decision. Otherwise, the SLL parsing algorithm will use ATN transitions exclusively.

See Also: SLL_ATNTransitions, ParserATNSimulator#computeTargetState, LexerATNSimulator#computeTargetState

SLL_DFATransitions back to summary

SLL_DFATransitions	back to summary
public long SLL_DFATransitions The total number of DFA transitions required during SLL prediction for this decision. If the ATN simulator implementation does not use DFA caching for SLL transitions, this value will be 0. See Also `ParserATNSimulator#getExistingTargetState`, `LexerATNSimulator#getExistingTargetState`

public long SLL_DFATransitions

The total number of DFA transitions required during SLL prediction for this decision.

If the ATN simulator implementation does not use DFA caching for SLL transitions, this value will be 0.

See Also: ParserATNSimulator#getExistingTargetState, LexerATNSimulator#getExistingTargetState

SLL_MaxLook	back to summary
public long SLL_MaxLook Gets the maximum lookahead required for any single SLL prediction to complete for this decision, by reaching a unique prediction, reaching an SLL conflict state, or encountering a syntax error.

SLL_MaxLookEvent	back to summary
public LookaheadEventInfo SLL_MaxLookEvent Gets the `LookaheadEventInfo` associated with the event where the `SLL_MaxLook` value was set.

SLL_MinLook	back to summary
public long SLL_MinLook Gets the minimum lookahead required for any single SLL prediction to complete for this decision, by reaching a unique prediction, reaching an SLL conflict state, or encountering a syntax error.

SLL_TotalLook	back to summary
public long SLL_TotalLook The sum of the lookahead required for SLL prediction for this decision. Note that SLL prediction is used before LL prediction for performance reasons even when `PredictionMode#LL` or `PredictionMode#LL_EXACT_AMBIG_DETECTION` is used.

timeInPrediction back to summary

timeInPrediction	back to summary
public long timeInPrediction The total time spent in `ParserATNSimulator#adaptivePredict` for this decision, in nanoseconds. The value of this field contains the sum of differential results obtained by `System#nanoTime()`, and is not adjusted to compensate for JIT and/or garbage collection overhead. For best accuracy, use a modern JVM implementation that provides precise results from `System#nanoTime()`, and perform profiling in a separate process which is warmed up by parsing the input prior to profiling. If desired, call `ATNSimulator#clearDFA` to reset the DFA cache to its initial state before starting the profiling measurement pass.

public long timeInPrediction

The total time spent in ParserATNSimulator#adaptivePredict for this decision, in nanoseconds.

The value of this field contains the sum of differential results obtained by System#nanoTime(), and is not adjusted to compensate for JIT and/or garbage collection overhead. For best accuracy, use a modern JVM implementation that provides precise results from System#nanoTime(), and perform profiling in a separate process which is warmed up by parsing the input prior to profiling. If desired, call ATNSimulator#clearDFA to reset the DFA cache to its initial state before starting the profiling measurement pass.

public Class DecisionInfo

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