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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * 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");

        }

    }

}