jsinterop.annotations.JsNullable Maven / Gradle / Ivy
/*
* Copyright 2018 Google Inc.
*
* 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 jsinterop.annotations;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* JsNullable marks a type variable as nullable indicating that program elements of such a type can
* hold a {@code null} value.
*
* Note that JsNullable can only be used on type variables in the context of a JsConstructor, a
* JsMethod, a JsProperty or a JsFunction method.
*
*
This annotation is informational in the GWT compiler but other compilers or tools might use it
* for example to annotate types in the output JavaScript program.
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE_USE)
@Documented
public @interface JsNullable {}