package org.checkerframework.framework.qual;
import java.lang.annotation.Annotation;
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;
/**
* A precondition annotation to indicate that a method requires certain expressions to have a
* certain qualifier at the time of the call to the method. The expressions for which the annotation
* must hold after the methods execution are indicated by {@code expression} and are specified using
* a string. The qualifier is specified by {@code qualifier}.
*
* @author Stefan Heule
* @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
public @interface RequiresQualifier {
/**
* The Java expressions for which the annotation need to be present.
*
* @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
*/
String[] expression();
/** The qualifier that is required. */
Class<? extends Annotation> qualifier();
}