67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/*
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* Copyright (c) 2024, 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 8340145
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* @summary Problem with generic pattern matching results in internal compiler error
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* @compile T8340145.java
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* @run main T8340145
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*/
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public class T8340145 {
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public static void main(String[] args) {
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Option<Integer> optionInteger = new Option.Some<>(21);
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Number number = Option.unwrapOrElse(optionInteger, 5.2);
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Option2<Impl> optionBound = new Option2.Some<>(new Impl (){});
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Bound number2 = Option2.unwrapOrElse(optionBound, new Impl(){});
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}
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sealed interface Option<T> permits Option.Some, Option.None {
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record Some<T>(T value) implements Option<T> {}
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record None<T>() implements Option<T> {}
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static <T, T2 extends T> T unwrapOrElse(Option<T2> option, T defaultValue) {
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return switch (option) {
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case Option.Some(T2 value) -> value;
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case Option.None<T2> _ -> defaultValue;
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};
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}
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}
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interface Bound {}
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interface Bound2 {}
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static class Impl implements Bound, Bound2 {}
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sealed interface Option2<T> permits Option2.Some, Option2.None {
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record Some<T>(T value) implements Option2<T> {}
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record None<T>() implements Option2<T> {}
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static <T extends Bound & Bound2> T unwrapOrElse(Option2<T> option, T defaultValue) {
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return switch (option) {
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case Option2.Some(T value) -> value;
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case Option2.None<T> _ -> defaultValue;
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};
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}
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}
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}
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