PredictionContext class abstract

Implementers

Constructors

PredictionContext(int cachedHashCode)

Properties

cachedHashCode → int
Stores the computed hash code of this PredictionContext. The hash code is computed in parts to match the following reference algorithm.
final
hashCode → int
The hash code for this object.
no setteroverride
id ↔ int
getter/setter pair
isEmpty → bool
This means only the {@link #EMPTY} (wildcard? not sure) context is in set.
no setter
length → int
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

getParent(int index) → PredictionContext?
getReturnState(int index) → int
hasEmptyPath() → bool
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
toStrings(Recognizer<ATNSimulator>? recognizer, PredictionContext stop, int currentState) → List<String>

Operators

operator ==(Object obj) → bool
The equality operator.
override

Static Properties

EMPTY_RETURN_STATE → int
Represents {@code $} in an array in full context mode, when {@code $} doesn't mean wildcard: {@code $ + x = $,x}. Here, {@code $} = {@link #EMPTY_RETURN_STATE}.
final
globalNodeCount ↔ int
getter/setter pair
INITIAL_HASH → int
final

Static Methods

calculateEmptyHashCode() → int
calculateHashCode(List<PredictionContext?> parents, List<int> returnStates) → int
combineCommonParents(List<PredictionContext?> parents) → void
Make pass over all M parents; merge any {@code equals()} ones.
fromRuleContext(ATN atn, RuleContext? outerContext) → PredictionContext
Convert a RuleContext tree to a PredictionContext graph. Return {@link #EMPTY} if outerContext is empty or null.
getAllContextNodes(PredictionContext context) → List<PredictionContext>
getAllContextNodes_(PredictionContext? context, List<PredictionContext> nodes, Map<PredictionContext, PredictionContext> visited) → void
getCachedContext(PredictionContext context, PredictionContextCache contextCache, Map<PredictionContext, PredictionContext> visited) → PredictionContext
merge(PredictionContext a, PredictionContext b, bool rootIsWildcard, Map<Pair<PredictionContext, PredictionContext>, PredictionContext>? mergeCache) → PredictionContext
mergeArrays(ArrayPredictionContext a, ArrayPredictionContext b, bool rootIsWildcard, Map<Pair<PredictionContext, PredictionContext>, PredictionContext>? mergeCache) → PredictionContext
Merge two ArrayPredictionContext instances.
mergeRoot(SingletonPredictionContext a, SingletonPredictionContext b, bool rootIsWildcard) → PredictionContext?
Handle case where at least one of a or b is {@link #EMPTY}. In the following diagrams, the symbol {@code $} is used to represent {@link #EMPTY}.
mergeSingletons(SingletonPredictionContext a, SingletonPredictionContext b, bool rootIsWildcard, Map<Pair<PredictionContext, PredictionContext>, PredictionContext>? mergeCache) → PredictionContext
Merge two SingletonPredictionContext instances.
toDOTString(PredictionContext? context) → String