87 lines
2.5 KiB
Java
87 lines
2.5 KiB
Java
/*
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* Copyright (c) 2023, 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 8318144
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* @summary Verify switches work in presence of enum constants that have bodies
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* @compile SwitchEnumConstants.java
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* @run main SwitchEnumConstants
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*/
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import java.util.function.ToIntFunction;
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public class SwitchEnumConstants {
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public static void main(String... args) throws Exception {
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new SwitchEnumConstants().run();
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}
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void run() throws Exception {
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doRun(this::typeSwitch);
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doRun(this::enumSwitch);
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}
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void doRun(ToIntFunction<Object> c) throws Exception {
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assertEquals(0, c.applyAsInt(E.A));
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assertEquals(1, c.applyAsInt(E.B));
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assertEquals(2, c.applyAsInt(E.C));
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assertEquals(3, c.applyAsInt(""));
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}
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int typeSwitch(Object o) {
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return switch (o) {
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case E.A -> 0;
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case E.B -> 1;
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case E.C -> 2;
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case String s -> 3;
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default -> throw new IllegalStateException();
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};
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}
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int enumSwitch(Object o) {
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if (!(o instanceof E e)) {
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return 3;
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}
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return switch (e) {
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case A -> 0;
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case B -> 1;
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case C -> 2;
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};
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}
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private static void assertEquals(int expected, int actual) {
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if (expected != actual) {
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throw new AssertionError("expected: " + expected +
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", actual: " + actual);
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}
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}
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enum E {
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A {},
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B {},
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C {}
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}
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}
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