IssueTracker

Android Studio 3.0 Beta 6
Build #AI-171.4333198, built on September 13, 2017
JRE: 1.8.0_152-release-915-b01 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

Suppose you wish to convert the next Java code:

    public enum AppComponentState {
        ENABLED, DISABLED, DEFAULT
    }

    public static AppComponentState getAppComponentState(final Context context, final Class<?> appComponentClass) {
        final ComponentName componentName = new ComponentName(context, appComponentClass);
        final PackageManager pm = context.getPackageManager();
        final int result = pm.getComponentEnabledSetting(componentName);
        switch (result) {
            case PackageManager.COMPONENT_ENABLED_STATE_DISABLED:
                return AppComponentState.DISABLED;
            case PackageManager.COMPONENT_ENABLED_STATE_ENABLED:
                return AppComponentState.ENABLED;
            default:
                // other values aren't supposed to be returned, according to the documentation
                return AppComponentState.DEFAULT;
        }
    }

You get this:

    enum class AppComponentState {
        ENABLED, DISABLED, DEFAULT
    }

    @JvmStatic
    fun getAppComponentState(context: Context, appComponentClass: Class<*>): AppComponentState {
        val componentName = ComponentName(context, appComponentClass)
        val pm = context.packageManager
        val result = pm.getComponentEnabledSetting(componentName)
        when (result) {
            PackageManager.COMPONENT_ENABLED_STATE_DISABLED -> return AppComponentState.DISABLED
            PackageManager.COMPONENT_ENABLED_STATE_ENABLED -> return AppComponentState.ENABLED
            else ->
                // other values aren't supposed to be returned, according to the documentation
                return AppComponentState.DEFAULT
        }
    }

However, as opposed to Java, that offers you to add missing cases to the switch-case, on Kotlin it only warns you.

Attached screenshots to show issue.