用于全局kotlinx.serialization的类型无效

Question

首先，我会发布代码

@OptIn(ExperimentalSerializationApi::class)
@Serializer(forClass = UUID::class)
object UUIDserializer : KSerializer<UUID> {
    override fun deserialize(decoder: Decoder): UUID = UUID.fromString(decoder.decodeString())

    override val descriptor: SerialDescriptor
        get() = PrimitiveSerialDescriptor("UUID", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: UUID) {
        encoder.encodeString(value.toString())
    }
}
typealias SID = @Serializable(with = UUIDserializer::class) UUID
fun randomSid() = UUID.randomUUID() as SID
@Serializable
data class Example(val id:SID = randomSid())
class SerializeId {
    @Test
    fun nestedTypeUsage() {
        val example = Example()
        val string = Json.encodeToString(example)
        println(string)
    }
    @Test
    fun directTypeUsage () {
        val hi = randomSid()
        val string = Json.encodeToString(hi)
        println(string)
    }
}

nestedTypeUsage运行并传递，但directTypeUsage失败。

未找到类“UUID”的

序列化程序。将类标记为@Serializable或显式提供序列化程序。kotlinx.serialization.SerializationException:找不到类'UUID‘的序列化程序

我无法将@Serializable注释直接应用于val或函数参数。

Answer 1

几乎是在发布这篇文章之后。我意识到我可以

@Test
fun directTypeUsage () {
    val hi = randomSid()
    val string = hi.toString()
    println(string)
}