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package org.checkerframework.checker.nullness.qual;
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;
/**
* {@link Nullable} is a type annotation that indicates that the value is not
* known to be non-null (see {@link NonNull}). Only if an expression has a
* {@link Nullable} type may it be assigned {@code null}.
*
* <p>
* This annotation is associated with the {@link AbstractNullnessChecker}.
*
* @see NonNull
* @see MonotonicNonNull
* @see AbstractNullnessChecker
* @checker_framework.manual #nullness-checker Nullness Checker
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE_USE, ElementType.TYPE_PARAMETER })
public @interface Nullable {
}
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