/*
* Copyright 2013 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.errorprone.refaster.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates that Refaster should, additionally, refactor the negation of this rule and its
* corresponding before templates. For example, given a {@code BeforeTemplate} with the code
* {@code str.length() == 0} and an {@code @AfterTemplate @AlsoNegation} with the code
* {@code str.isEmpty()}, Refaster would also rewrite {@code str.length() != 0} as
* {@code !str.isEmpty()}.
*
* <p>If this annotation is applied, all {@code BeforeTemplate} and {@code AfterTemplate}
* templates must be expression templates with boolean return type.
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.SOURCE)
@RequiredAnnotation(AfterTemplate.class)
public @interface AlsoNegation {}