org.checkerframework.framework.qual.DefaultQualifierInHierarchy Maven / Gradle / Ivy
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package org.checkerframework.framework.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;
/**
* Indicates that the annotated qualifier is the default qualifier in the qualifier hierarchy: it
* applies if the programmer writes no explicit qualifier and no other default has been specified
* for the location.
*
* Other defaults can be specified for a checker via the {@link DefaultFor} meta-annotation,
* which takes precedence over {@code DefaultQualifierInHierarchy}, or via {@code
* GenericAnnotatedTypeFactory.addCheckedCodeDefaults()}. Also, the CLIMB-to-top rule applies unless
* explicitly overruled.
*
*
The {@link DefaultQualifier} annotation, which targets Java code elements, takes precedence
* over {@code DefaultQualifierInHierarchy}.
*
*
Each type qualifier hierarchy may have at most one qualifier marked as {@code
* DefaultQualifierInHierarchy}.
*
* @checker_framework.manual #effective-qualifier The effective qualifier on a type (defaults and
* inference)
* @checker_framework.manual #defaults Default qualifiers for unannotated types
* @see org.checkerframework.framework.qual.DefaultQualifier
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.ANNOTATION_TYPE)
public @interface DefaultQualifierInHierarchy {}