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/*
* Copyright (c) 2018, 2019, 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8206986 8214114 8214529
* @summary Verify various corner cases with nested switch expressions.
* @compile ExpressionSwitchBugs.java
* @run main ExpressionSwitchBugs
*/
public class ExpressionSwitchBugs {
public static void main(String... args) {
new ExpressionSwitchBugs().testNested();
new ExpressionSwitchBugs().testAnonymousClasses();
new ExpressionSwitchBugs().testFields();
check(3, new C(-1, 3).test(false));
check(3, new C(3, -1).test(true));
}
private void testNested() {
int i = 0;
check(42, id(switch (42) {
default: i++; yield 42;
}));
i = 0;
check(43, id(switch (42) {
case 42: while (i == 0) {
i++;
}
yield 42 + i;
default: i++; yield 42;
}));
i = 0;
check(42, id(switch (42) {
case 42: if (i == 0) {
yield 42;
}
default: i++; yield 43;
}));
i = 0;
check(42, id(switch (42) {
case 42: if (i == 0) {
yield 41 + switch (0) {
case 0 -> 1;
default -> -1;
};
}
default: i++; yield 43;
}));
}
private void testAnonymousClasses() {
for (int i : new int[] {1, 2}) {
check(3, id((switch (i) {
case 1: yield new I() {
public int g() { return 3; }
};
default: yield (I) () -> { return 3; };
}).g()));
check(3, id((switch (i) {
case 1 -> new I() {
public int g() { return 3; }
};
default -> (I) () -> { return 3; };
}).g()));
}
}
private void testFields() {
check(3, field);
check(3, ExpressionSwitchBugs.staticField);
}
private final int value = 2;
private final int field = id(switch(value) {
case 0 -> -1;
case 2 -> {
int temp = 0;
temp += 3;
yield temp;
}
default -> throw new IllegalStateException();
});
private static final int staticValue = 2;
private static final int staticField = new ExpressionSwitchBugs().id(switch(staticValue) {
case 0 -> -1;
case 2 -> {
int temp = 0;
temp += 3;
yield temp;
}
default -> throw new IllegalStateException();
});
private int id(int i) {
return i;
}
private int id(Object o) {
return -1;
}
private static void check(int actual, int expected) {
if (actual != expected) {
throw new AssertionError("Unexpected result: " + actual);
}
}
public interface I {
public int g();
}
static class Super {
public final int i;
public Super(int i) {
this.i = i;
}
}
static class C extends Super {
public final int i;
public C(int superI, int i) {
super(superI);
this.i = i;
}
public int test(boolean fromSuper) {
return switch (fromSuper ? 0 : 1) {
case 0 -> {
yield super.i;
}
default -> {
yield this.i;
}
};
}
}
}
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