Error formatting switch blocks with arrow labels

[skirkpatrick]

GJF gives the following error when formatting a file containing a switch statement using Java 14 arrow labels (case ... ->):

error: expected token: 'case'; generated ; instead

For example:

public class App {

  public void test(String subject) {
    switch (subject) {
      case "A" -> System.out.println("A");
      case "B" -> System.out.println("B");
    }
  }
}

GJF version: google-java-format-1.8-all-deps.jar
Java version:

openjdk version "14.0.1" 2020-04-14
OpenJDK Runtime Environment AdoptOpenJDK (build 14.0.1+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 14.0.1+7, mixed mode, sharing)

[tbroyer]

Duplicate of #477 ?

[skirkpatrick]

#477 refers to switch expressions, and has been fixed in GJF 1.8.

This issue specifically affects switch statements (non-value returning) using the arrow label syntax (traditional case ...: labels work fine)

EDIT: actually, I could be wrong. Testing with the HEAD build...

[skirkpatrick]

@tbroyer you're correct, looks like this has already been fixed on master. Closing!

[tbroyer]

A test was added when adding support for yield in #489 (not sure which commit actually fixed it though):

google-java-format/core/src/test/resources/com/google/googlejavaformat/java/testdata/ExpressionSwitch.input

Lines 23 to 26 in 45fb41a

	switch (i) {
	case 0 -> { System.out.println("0"); }
	default -> System.out.println("default");
	}