org.checkerframework.common.returnsreceiver.qual.UnknownThis Maven / Gradle / Ivy
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The Checker Framework enhances Java's type system to
make it more powerful and useful. This lets software developers
detect and prevent errors in their Java programs.
The Checker Framework includes compiler plug-ins ("checkers")
that find bugs or verify their absence. It also permits you to
write your own compiler plug-ins.
package org.checkerframework.common.returnsreceiver.qual;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.checkerframework.framework.qual.DefaultFor;
import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
import org.checkerframework.framework.qual.LiteralKind;
import org.checkerframework.framework.qual.QualifierForLiterals;
import org.checkerframework.framework.qual.SubtypeOf;
import org.checkerframework.framework.qual.TypeUseLocation;
/**
* The top type for the Returns Receiver Checker's type system. Values of the annotated type might
* be the receiver ({@code this}) or might not. Programmers should rarely write this type.
*
* @checker_framework.manual #returns-receiver-checker Returns Receiver Checker
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
@DefaultQualifierInHierarchy
@SubtypeOf({})
@QualifierForLiterals(LiteralKind.NULL)
@DefaultFor(value = TypeUseLocation.LOWER_BOUND)
public @interface UnknownThis {}