И еще раз про Guard Conditions

👉 Как включить:
1) Проверяем что стоит галочка напротив Enable K2 mode в IDE
2) Добавляем compileOptions

kotlin {
    compilerOptions {
        freeCompilerArgs.add("-Xwhen-guards")
    }
}

👉 Без guard conditions:

when (response) {
    is HttpResult.Success -> println("Success")
    is HttpResult.Failed -> {
        if (response.statusCode == 503) {
            println("Maintenance")
        } else {
            println("Failed with code ${response.statusCode}")
        }
    }
}

👉 С guard conditions:

when (response) {
    is HttpResult.Success -> println("Success")
    is HttpResult.Failed if response.statusCode == 503 -> println("Maintenance")
    is HttpResult.Failed -> println("Failed with code ${response.statusCode}")
}