163 lines
4.4 KiB
Java
163 lines
4.4 KiB
Java
/*
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* Copyright (c) 2018, 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 8206986 8214114 8214529
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* @summary Verify various corner cases with nested switch expressions.
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* @compile ExpressionSwitchBugs.java
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* @run main ExpressionSwitchBugs
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*/
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public class ExpressionSwitchBugs {
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public static void main(String... args) {
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new ExpressionSwitchBugs().testNested();
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new ExpressionSwitchBugs().testAnonymousClasses();
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new ExpressionSwitchBugs().testFields();
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check(3, new C(-1, 3).test(false));
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check(3, new C(3, -1).test(true));
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}
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private void testNested() {
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int i = 0;
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check(42, id(switch (42) {
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default: i++; yield 42;
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}));
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i = 0;
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check(43, id(switch (42) {
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case 42: while (i == 0) {
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i++;
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}
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yield 42 + i;
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default: i++; yield 42;
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}));
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i = 0;
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check(42, id(switch (42) {
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case 42: if (i == 0) {
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yield 42;
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}
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default: i++; yield 43;
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}));
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i = 0;
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check(42, id(switch (42) {
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case 42: if (i == 0) {
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yield 41 + switch (0) {
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case 0 -> 1;
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default -> -1;
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};
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}
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default: i++; yield 43;
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}));
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}
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private void testAnonymousClasses() {
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for (int i : new int[] {1, 2}) {
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check(3, id((switch (i) {
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case 1: yield new I() {
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public int g() { return 3; }
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};
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default: yield (I) () -> { return 3; };
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}).g()));
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check(3, id((switch (i) {
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case 1 -> new I() {
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public int g() { return 3; }
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};
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default -> (I) () -> { return 3; };
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}).g()));
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}
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}
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private void testFields() {
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check(3, field);
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check(3, ExpressionSwitchBugs.staticField);
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}
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private final int value = 2;
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private final int field = id(switch(value) {
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case 0 -> -1;
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case 2 -> {
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int temp = 0;
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temp += 3;
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yield temp;
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}
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default -> throw new IllegalStateException();
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});
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private static final int staticValue = 2;
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private static final int staticField = new ExpressionSwitchBugs().id(switch(staticValue) {
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case 0 -> -1;
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case 2 -> {
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int temp = 0;
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temp += 3;
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yield temp;
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}
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default -> throw new IllegalStateException();
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});
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private int id(int i) {
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return i;
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}
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private int id(Object o) {
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return -1;
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}
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private static void check(int actual, int expected) {
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if (actual != expected) {
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throw new AssertionError("Unexpected result: " + actual);
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}
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}
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public interface I {
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public int g();
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}
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static class Super {
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public final int i;
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public Super(int i) {
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this.i = i;
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}
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}
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static class C extends Super {
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public final int i;
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public C(int superI, int i) {
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super(superI);
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this.i = i;
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}
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public int test(boolean fromSuper) {
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return switch (fromSuper ? 0 : 1) {
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case 0 -> {
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yield super.i;
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}
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default -> {
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yield this.i;
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}
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};
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}
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}
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}
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