| package org.checkerframework.checker.initialization.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; |
| import org.checkerframework.framework.qual.LiteralKind; |
| import org.checkerframework.framework.qual.QualifierForLiterals; |
| import org.checkerframework.framework.qual.SubtypeOf; |
| import org.checkerframework.framework.qual.TargetLocations; |
| import org.checkerframework.framework.qual.TypeUseLocation; |
| |
| /** |
| * The bottom type in the initialization type system. Programmers should rarely write this type. |
| * |
| * <p>The "FBC" in the name stands for "Freedom Before Commitment", an approach that the |
| * Initialization Checker builds upon. |
| * |
| * @checker_framework.manual #initialization-checker Initialization Checker |
| * @checker_framework.manual #bottom-type the bottom type |
| */ |
| @Documented |
| @Retention(RetentionPolicy.RUNTIME) |
| @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER}) |
| @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND}) |
| @SubtypeOf({UnderInitialization.class, Initialized.class}) |
| @QualifierForLiterals(LiteralKind.NULL) |
| public @interface FBCBottom {} |