53 lines
2.0 KiB
Java
53 lines
2.0 KiB
Java
/*
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* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8231827
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* @summary Testing pattern matching against the null constant
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* @compile/fail/ref=NullsInPatterns.out -XDrawDiagnostics NullsInPatterns.java
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*/
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import java.util.List;
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public class NullsInPatterns {
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public static void main(String[] args) {
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if (null instanceof List t) {
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throw new AssertionError("broken");
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} else {
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System.out.println("null does not match List type pattern");
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}
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//reifiable types not allowed in type test patterns in instanceof:
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// if (null instanceof List<Integer> l) {
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// throw new AssertionError("broken");
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// } else {
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// System.out.println("null does not match List<Integer> type pattern");
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// }
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if (null instanceof List<?> l) {
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throw new AssertionError("broken");
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} else {
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System.out.println("null does not match List<?> type pattern");
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}
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}
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}
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