checker.src.org.checkerframework.checker.nullness.qual.UnknownKeyFor Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of checker Show documentation

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.

There is a newer version: 3.42.0

Show newest version

package org.checkerframework.checker.nullness.qual;

import java.lang.annotation.*;

import org.checkerframework.framework.qual.*;

/**
 * Used internally by the type system; should never be written by a programmer.
 *
 * 
 * Indicates that the value assigned to the annotated variable is not known to be
 * a key for any map.  It is the top type qualifier in the
 * {@link KeyFor} hierarchy.  It is also the default type qualifier.
 *
 * @checker_framework.manual #map-key-checker Map Key Checker
 */
@InvisibleQualifier
@SubtypeOf({})
@DefaultQualifierInHierarchy
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
public @interface UnknownKeyFor {}