1 /*
2  * @test /nodynamiccopyright/
3  * @bug 4974927 8064464
4  * @summary The compiler was allowing void types in its parsing of conditional expressions.
5  * @author tball
6  *
7  * @compile/fail/ref=ConditionalWithVoid.out --enable-preview -source ${jdk.version} -XDrawDiagnostics ConditionalWithVoid.java
8  */
9 public class ConditionalWithVoid {
test(Object o, String s)10     public void test(Object o, String s) {
11         // Should fail to compile since Object.wait() has a void return type. Poly case.
12         System.out.println(o instanceof String ? o.hashCode() : o.wait());
13         // Should fail to compile since Object.wait() has a void return type. Standalone case.
14         (o instanceof String ? o.hashCode() : o.wait()).toString();
15         // Should fail to compile since Object.wait() has a void return type. Poly case.
16         System.out.println(switch (s) {case "" -> o.hashCode(); default -> o.wait();});
17         // Should fail to compile since Object.wait() has a void return type. Standalone case.
18         (switch (s) {case "" -> o.hashCode(); default -> o.wait();}).toString();
19     }
20 }
21