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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.checker.fenum.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.DefaultFor;
import org.checkerframework.framework.qual.SubtypeOf;
import org.checkerframework.framework.qual.TargetLocations;
import org.checkerframework.framework.qual.TypeUseLocation;
/**
* The bottom type in the Fenum type system. Programmers should rarely write this type.
*
* Its relationships are set up via the FenumAnnotatedTypeFactory.
*
* @checker_framework.manual #propkey-checker Property File 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})
// Subtype relationships are set up by passing this class as a bottom
// to the multigraph hierarchy constructor.
@SubtypeOf({})
@DefaultFor(TypeUseLocation.LOWER_BOUND)
public @interface FenumBottom {}