b3b644438e
8207405: Compiler Tree API support for Switch Expressions (Preview) Support for switch expression, switch with rules and multiple constants for cases. Reviewed-by: jjg, mcimadamore, vromero
83 lines
2.4 KiB
Java
83 lines
2.4 KiB
Java
/*
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* Copyright (c) 2018, 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
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* @summary Verify various corner cases with nested switch expressions.
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* @compile --enable-preview -source 12 ExpressionSwitchBugs.java
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* @run main/othervm --enable-preview 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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}
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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++; break 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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break 42 + i;
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default: i++; break 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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break 42;
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}
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default: i++; break 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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break 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++; break 43;
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}));
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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 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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}
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