8205626: Start of release updates for JDK 13
8205393: Add SourceVersion.RELEASE_13
8205394: Add source 13 and target 13 to javac
8205645: Bump maximum recognized class file version to 57 for JDK 13
8214825: Update preview language features for start of JDK 13
Reviewed-by: erikj, alanb, mchung, mcimadamore, dholmes, smarks, jjg
/*
* @test /nodynamiccopyright/
* @bug 8206986
* @summary Check types inferred for switch expressions.
* @compile/fail/ref=ExpressionSwitchInfer.out -XDrawDiagnostics --enable-preview -source 13 ExpressionSwitchInfer.java
*/
import java.util.ArrayList;
import java.util.List;
public class ExpressionSwitchInfer {
private static final String NULL = "null";
private <T> T test(List<T> l, Class<T> c, String param) {
test(param == NULL ? new ArrayList<>() : new ArrayList<>(), CharSequence.class, param).charAt(0);
test(param == NULL ? new ArrayList<>() : new ArrayList<>(), CharSequence.class, param).substring(0);
test(switch (param) {
case NULL -> new ArrayList<>();
default -> new ArrayList<>();
}, CharSequence.class, param).charAt(0);
test(switch (param) {
case NULL -> new ArrayList<>();
default -> new ArrayList<>();
}, CharSequence.class, param).substring(0);
String str = switch (param) {
case "" -> {
break 0;
} default ->"default";
};
return null;
}
}