org.antlr.v4.runtime.atn

Class SemanticContext.AND

java.lang.Object

org.antlr.v4.runtime.atn.SemanticContext

org.antlr.v4.runtime.atn.SemanticContext.AND

Enclosing class:

SemanticContext

public static class SemanticContext.AND
extends SemanticContext

Nested Class Summary

Nested classes/interfaces inherited from class org.antlr.v4.runtime.atn.SemanticContext

SemanticContext.AND, SemanticContext.OR, SemanticContext.Predicate

Field Summary

Fields

Modifier and Type	Field and Description
SemanticContext[]	opnds

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

NONE, parent

Constructor Summary

Constructors

Constructor and Description
SemanticContext.AND(SemanticContext a, SemanticContext b)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
boolean	eval(Recognizer<?,?> parser, RuleContext outerContext) For context independent predicates, we evaluate them without a local context (i.e., null context).
int	hashCode()
String	toString()

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

and, or

Methods inherited from class java.lang.Object

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

Field Detail

opnds

@NotNull
public final SemanticContext[] opnds

Constructor Detail

SemanticContext.AND

public SemanticContext.AND(@NotNull
                   SemanticContext a,
                   @NotNull
                   SemanticContext b)

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

eval

public boolean eval(Recognizer<?,?> parser,
           RuleContext outerContext)

Description copied from class: SemanticContext

For context independent predicates, we evaluate them without a local context (i.e., null context). That way, we can evaluate them without having to create proper rule-specific context during prediction (as opposed to the parser, which creates them naturally). In a practical sense, this avoids a cast exception from RuleContext to myruleContext. For context dependent predicates, we must pass in a local context so that references such as $arg evaluate properly as _localctx.arg. We only capture context dependent predicates in the context in which we begin prediction, so we passed in the outer context here in case of context dependent predicate evaluation.

Specified by:

eval in class SemanticContext

toString

public String toString()

Overrides:

toString in class Object