org.antlr.v4.runtime.atn

Class PredicateTransition

java.lang.Object

org.antlr.v4.runtime.atn.Transition

org.antlr.v4.runtime.atn.AbstractPredicateTransition

org.antlr.v4.runtime.atn.PredicateTransition

public final class PredicateTransition
extends AbstractPredicateTransition

TODO: this is old comment: A tree of semantic predicates from the grammar AST if label==SEMPRED. In the ATN, labels will always be exactly one predicate, but the DFA may have to combine a bunch of them as it collects predicates from multiple ATN configurations into a single DFA state.

Field Summary

Fields

Modifier and Type	Field and Description
boolean	isCtxDependent
int	predIndex
int	ruleIndex

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

ACTION, ATOM, EPSILON, NOT_SET, PRECEDENCE, PREDICATE, RANGE, RULE, serializationNames, serializationTypes, SET, target, WILDCARD

Constructor Summary

Constructors

Constructor and Description
PredicateTransition(ATNState target, int ruleIndex, int predIndex, boolean isCtxDependent)

Method Summary

Methods

Modifier and Type	Method and Description
SemanticContext.Predicate	getPredicate()
int	getSerializationType()
boolean	isEpsilon() Determines if the transition is an "epsilon" transition.
boolean	matches(int symbol, int minVocabSymbol, int maxVocabSymbol)
java.lang.String	toString()

Methods inherited from class org.antlr.v4.runtime.atn.Transition

label

Methods inherited from class java.lang.Object

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

Field Detail

ruleIndex

public final int ruleIndex

predIndex

public final int predIndex

isCtxDependent

public final boolean isCtxDependent

Constructor Detail

PredicateTransition

public PredicateTransition(ATNState target,
                   int ruleIndex,
                   int predIndex,
                   boolean isCtxDependent)

Method Detail

getSerializationType

public int getSerializationType()

Specified by:

getSerializationType in class Transition

isEpsilon

public boolean isEpsilon()

Description copied from class: Transition

Determines if the transition is an "epsilon" transition.

The default implementation returns false.

Overrides:

isEpsilon in class Transition

Returns:

true if traversing this transition in the ATN does not consume an input symbol; otherwise, false if traversing this transition consumes (matches) an input symbol.

matches

public boolean matches(int symbol,
              int minVocabSymbol,
              int maxVocabSymbol)

Specified by:

matches in class Transition

getPredicate

public SemanticContext.Predicate getPredicate()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object