test/langtools/tools/javac/switchexpr/ExpressionSwitchIntersectionTypes.java
author darcy
Thu, 13 Dec 2018 19:06:11 +0100
changeset 53023 6879069d9d94
parent 51563 de411d537aae
child 53878 4584d0331318
permissions -rw-r--r--
8205626: Start of release updates for JDK 13 8205393: Add SourceVersion.RELEASE_13 8205394: Add source 13 and target 13 to javac 8205645: Bump maximum recognized class file version to 57 for JDK 13 8214825: Update preview language features for start of JDK 13 Reviewed-by: erikj, alanb, mchung, mcimadamore, dholmes, smarks, jjg

/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 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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 * questions.
 */

/*
 * @test
 * @bug 8206986
 * @summary Verify behavior when an intersection type is inferred for switch expression.
 * @compile --enable-preview -source 13 ExpressionSwitchIntersectionTypes.java
 * @run main/othervm --enable-preview ExpressionSwitchIntersectionTypes
 */

public class ExpressionSwitchIntersectionTypes<X  extends java.io.Serializable & Runnable> {

    void test1(int i, X x) {
        Runnable r1 = switch (i) {
            default -> x;
        };
        r1.run();
    }

    void test2(int i, X x) {
        (switch (i) {
            default -> x;
        }).run();
    }

    public static void main(String[] args) {
        ExpressionSwitchIntersectionTypes t = new ExpressionSwitchIntersectionTypes();
        try {
            t.test1(0, "");
            throw new AssertionError("Expected exception didn't occur.");
        } catch (ClassCastException ex) {
            //good
        }
        try {
            t.test2(0, "");
            throw new AssertionError("Expected exception didn't occur.");
        } catch (ClassCastException ex) {
            //good
        }
    }

}