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/*
* @test /nodynamiccopyright/
* @bug 8231827
* @summary Testing pattern matching against the null constant
* @run main NullsInPatterns
*/
import java.util.List;
public class NullsInPatterns {
public static void main(String... args) {
if (null instanceof List t) {
throw new AssertionError("broken");
} else {
System.out.println("null does not match List type pattern");
}
//reifiable types not allowed in type test patterns in instanceof:
// if (null instanceof List<Integer> l) {
// throw new AssertionError("broken");
// } else {
// System.out.println("null does not match List<Integer> type pattern");
// }
if (null instanceof List<?> l) {
throw new AssertionError("broken");
} else {
System.out.println("null does not match List<?> type pattern");
}
}
}
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