org.antlr.v4.runtime.atn

类 SemanticContext.PrecedencePredicate

java.lang.Object

org.antlr.v4.runtime.atn.SemanticContext

org.antlr.v4.runtime.atn.SemanticContext.PrecedencePredicate

所有已实现的接口:

Comparable<SemanticContext.PrecedencePredicate>

封闭类:

SemanticContext

public static class SemanticContext.PrecedencePredicate
extends SemanticContext
implements Comparable<SemanticContext.PrecedencePredicate>

嵌套类概要

从类继承的嵌套类/接口 org.antlr.v4.runtime.atn.SemanticContext

SemanticContext.AND, SemanticContext.Operator, SemanticContext.OR, SemanticContext.PrecedencePredicate, SemanticContext.Predicate

字段概要

字段

限定符和类型	字段和说明
int	precedence

从类继承的字段 org.antlr.v4.runtime.atn.SemanticContext

NONE

构造器概要

构造器

限定符	构造器和说明
protected	PrecedencePredicate()
	PrecedencePredicate(int precedence)

方法概要

限定符和类型	方法和说明
int	compareTo(SemanticContext.PrecedencePredicate o)
boolean	equals(Object obj)
<T> boolean	eval(Recognizer<T,?> parser, RuleContext parserCallStack) For context independent predicates, we evaluate them without a local context (i.e., null context).
SemanticContext	evalPrecedence(Recognizer<?,?> parser, RuleContext parserCallStack) Evaluate the precedence predicates for the context and reduce the result.
int	hashCode()
String	toString()

从类继承的方法 org.antlr.v4.runtime.atn.SemanticContext

and, or

从类继承的方法 java.lang.Object

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

字段详细资料

precedence

public final int precedence

构造器详细资料

PrecedencePredicate

protected PrecedencePredicate()

PrecedencePredicate

public PrecedencePredicate(int precedence)

方法详细资料

eval

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

从类复制的说明: 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.

指定者:

eval 在类中 SemanticContext

evalPrecedence

public SemanticContext evalPrecedence(Recognizer<?,?> parser,
                                      RuleContext parserCallStack)

从类复制的说明: SemanticContext

Evaluate the precedence predicates for the context and reduce the result.

覆盖:

evalPrecedence 在类中 SemanticContext

参数:

parser - The parser instance.

返回:

The simplified semantic context after precedence predicates are evaluated, which will be one of the following values.

• SemanticContext.NONE: if the predicate simplifies to true after precedence predicates are evaluated.
• null: if the predicate simplifies to false after precedence predicates are evaluated.
• this: if the semantic context is not changed as a result of precedence predicate evaluation.
• A non-null SemanticContext: the new simplified semantic context after precedence predicates are evaluated.

compareTo

public int compareTo(SemanticContext.PrecedencePredicate o)

指定者:

compareTo 在接口中 Comparable<SemanticContext.PrecedencePredicate>

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object