com.google.j2objc.annotations.Weak Maven / Gradle / Ivy
/*
* Copyright 2012 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.j2objc.annotations;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.CLASS;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Annotation that indicates a variable has a weak relationship to its owner. The variable will be
* declared with the __weak annotation if compiled with either ARC ("-fobjc-arc" clang flag) or the
* "-fobjc-weak" clang flag (set by j2objc script).
*
* If compiled with neither clang flag, the variable will be declared with the
* __unsafe_unretained annotation. However, it's recommended that either ARC compilation or using
* the "-fobjc-weak" flag be used.
*
* @author Tom Ball
*/
@Target({FIELD, LOCAL_VARIABLE, PARAMETER})
@Retention(CLASS)
public @interface Weak {}