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/**
* Inspired by examples in https://openjdk.java.net/jeps/420
*/
public class SwitchPatternPreview3Error2 {
static void constantLabelsMustAppearBeforePatterns2(Object o) {
switch (o) {
case null -> System.out.println("value unavailable: " + o);
// This seems to be a bug in JEP 420 implementation. Those constants should be compatible with 'Object'.
// case -1, 1 -> System.out.println("absolute value 1: " + o);
// case "hello" -> System.out.println("string value: " + o);
// 'Integer value' dominates the next two, more specific ones -> error
case Integer value -> System.out.println("other integer: " + o);
case Integer value when (value == 1 || value == -1) -> System.out.println("absolute value 1: " + o);
case Integer value when value > 0 -> System.out.println("positive integer: " + o);
case String value when value.startsWith("hello") -> System.out.println("greeting: " + o);
default -> System.out.println("other type: " + o);
}
}
}
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