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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8231827
 * @summary Testing pattern matching against the null constant
 * @compile --enable-preview -source ${jdk.version} NullsInPatterns.java
 * @run main/othervm --enable-preview 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");
        }
    }
}