Java.src.org.antlr.v4.runtime.RuleDependency Maven / Gradle / Ivy
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The ANTLR 4 grammar compiler.
/* Copyright (c) 2012 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD-3-Clause license that
* can be found in the LICENSE.txt file in the project root.
*/
package org.antlr.v4.runtime;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Declares a dependency upon a grammar rule, along with a set of zero or more
* dependent rules.
*
* Version numbers within a grammar should be assigned on a monotonically
* increasing basis to allow for accurate tracking of dependent rules.
*
* @author Sam Harwell
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.FIELD})
public @interface RuleDependency {
Class> recognizer();
int rule();
int version();
/**
* Specifies the set of grammar rules related to {@link #rule} which the
* annotated element depends on. Even when absent from this set, the
* annotated element is implicitly dependent upon the explicitly specified
* {@link #rule}, which corresponds to the {@link Dependents#SELF} element.
*
* By default, the annotated element is dependent upon the specified
* {@link #rule} and its {@link Dependents#PARENTS}, i.e. the rule within
* one level of context information. The parents are included since the most
* frequent assumption about a rule is where it's used in the grammar.
*/
Dependents[] dependents() default {Dependents.SELF, Dependents.PARENTS};
}