| 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 {} |