Make `interface Event` the base type of a event, remove `interface Subscribable`

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/message/MessageQQA.kt

@@ -295,7 +295,7 @@ internal fun ImMsgBody.SourceMsg.toMessageChain(): MessageChain {
 }
 
 
-@UseExperimental(MiraiInternalAPI::class)
+@UseExperimental(MiraiInternalAPI::class, ExperimentalUnsignedTypes::class)
 internal fun List<ImMsgBody.Elem>.joinToMessageChain(message: MessageChain) {
     this.forEach {
         when {

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt

@@ -21,10 +21,13 @@ import kotlinx.io.core.use
 import net.mamoe.mirai.contact.ContactList
 import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.contact.MemberPermission
-import net.mamoe.mirai.event.events.ForceOfflineEvent
 import net.mamoe.mirai.data.MultiPacket
 import net.mamoe.mirai.data.Packet
-import net.mamoe.mirai.event.*
+import net.mamoe.mirai.event.BroadcastControllable
+import net.mamoe.mirai.event.Event
+import net.mamoe.mirai.event.broadcast
+import net.mamoe.mirai.event.events.ForceOfflineEvent
+import net.mamoe.mirai.event.subscribeAlways
 import net.mamoe.mirai.network.BotNetworkHandler
 import net.mamoe.mirai.qqandroid.GroupImpl
 import net.mamoe.mirai.qqandroid.MemberImpl
@@ -350,7 +353,7 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
 
 
         // broadcast
-        if (packet is Subscribable) {
+        if (packet is Event) {
             if (packet is BroadcastControllable) {
                 if (packet.shouldBroadcast) packet.broadcast()
             } else {

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/PacketFactory.kt

@@ -12,7 +12,7 @@ package net.mamoe.mirai.qqandroid.network.protocol.packet
 import kotlinx.io.core.*
 import kotlinx.io.pool.useInstance
 import net.mamoe.mirai.data.Packet
-import net.mamoe.mirai.event.Subscribable
+import net.mamoe.mirai.event.Event
 import net.mamoe.mirai.qqandroid.QQAndroidBot
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.TroopManagement
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.image.ImgStore
@@ -20,7 +20,6 @@ import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.image.LongConn
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.receive.MessageSvc
 import net.mamoe.mirai.qqandroid.network.protocol.packet.chat.receive.OnlinePush
 import net.mamoe.mirai.qqandroid.network.protocol.packet.list.FriendList
-import net.mamoe.mirai.qqandroid.network.protocol.packet.login.*
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.ConfigPushSvc
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.Heartbeat
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.StatSvc
@@ -59,7 +58,7 @@ internal abstract class OutgoingPacketFactory<TPacket : Packet>(
     final override val receivingCommandName: String get() = commandName
 
     /**
-     * **解码**服务器的回复数据包. 返回的包若是 [Subscribable], 则会 broadcast.
+     * **解码**服务器的回复数据包. 返回的包若是 [Event], 则会 broadcast.
      */
     abstract suspend fun ByteReadPacket.decode(bot: QQAndroidBot): TPacket
 
@@ -85,7 +84,7 @@ internal abstract class IncomingPacketFactory<TPacket : Packet>(
     val responseCommandName: String = ""
 ) : PacketFactory<TPacket>() {
     /**
-     * **解码**服务器的回复数据包. 返回的包若是 [Subscribable], 则会 broadcast.
+     * **解码**服务器的回复数据包. 返回的包若是 [Event], 则会 broadcast.
      */
     abstract suspend fun ByteReadPacket.decode(bot: QQAndroidBot, sequenceId: Int): TPacket
 

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/data/EventPacket.kt

@@ -9,11 +9,11 @@
 
 package net.mamoe.mirai.data
 
-import net.mamoe.mirai.event.Subscribable
+import net.mamoe.mirai.event.Event
 
 /**
  * 事件包. 可被监听.
  *
- * @see Subscribable
+ * @see Event
  */
-interface EventPacket : Subscribable, Packet
\ No newline at end of file
+interface EventPacket : Event, Packet
\ No newline at end of file

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/data/Packet.kt

@@ -11,6 +11,7 @@ package net.mamoe.mirai.data
 
 /**
  * 从服务器收到的包解析之后的结构化数据.
+ * 它是一个数据包工厂的处理的返回值.
  */
 interface Packet {
     /**

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/Subscribable.kt

@@ -17,61 +17,44 @@ import net.mamoe.mirai.event.internal.broadcastInternal
 import net.mamoe.mirai.utils.MiraiInternalAPI
 
 /**
- * 可被监听的.
+ * 可被监听的类, 可以是任何 class 或 object.
  *
- * 可以是任何 class 或 object.
+ * 若监听这个类, 监听器将会接收所有事件的广播.
  *
  * @see subscribeAlways
  * @see subscribeWhile
  *
  * @see subscribeMessages
- */
-interface Subscribable
-
-/**
- * 所有事件的基类.
- * 若监听这个类, 监听器将会接收所有事件的广播.
  *
  * @see [broadcast] 广播事件
  * @see [subscribe] 监听事件
  */
-abstract class Event : Subscribable {
+interface Event
 
+/**
+ * 可被取消的事件
+ */
+abstract class CancellableEvent : Event {
     /**
-     * 事件是否已取消. 事件需实现 [Cancellable] 才可以被取消, 否则这个字段为常量值 false
+     * 事件是否已取消.
      */
     val cancelled: Boolean get() = _cancelled
 
     private var _cancelled: Boolean = false
-        get() = field.takeIf { this is Cancellable } ?: false
-        private set(value) =
-            if (this is Cancellable) field = value
-            else throw UnsupportedOperationException()
 
     /**
-     * 取消事件. 事件需实现 [Cancellable] 才可以被取消
-     *
-     * @throws UnsupportedOperationException 如果事件没有实现 [Cancellable]
+     * 取消事件.
      */
     fun cancel() {
         _cancelled = true
     }
 }
 
-/**
- * 实现这个接口的事件([Event])可以被取消. 在广播中取消不会影响广播过程.
- */
-interface Cancellable : Subscribable {
-    val cancelled: Boolean
-
-    fun cancel()
-}
-
 /**
  * 广播一个事件的唯一途径.
  */
 @UseExperimental(MiraiInternalAPI::class)
-suspend fun <E : Subscribable> E.broadcast(): E = apply {
+suspend fun <E : Event> E.broadcast(): E = apply {
     if (this is BotEvent && !(this.bot as BotImpl<*>).onEvent(this)) {
         return@apply
     }
@@ -81,7 +64,7 @@ suspend fun <E : Subscribable> E.broadcast(): E = apply {
 /**
  * 可控制是否需要广播这个事件包
  */
-interface BroadcastControllable : Subscribable {
+interface BroadcastControllable : Event {
     val shouldBroadcast: Boolean
         get() = true
 }
\ No newline at end of file

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/Subscribers.kt

@@ -39,7 +39,7 @@ enum class ListeningStatus {
  * 事件监听器.
  * 由 [subscribe] 等方法返回.
  */
-interface Listener<in E : Subscribable> : CompletableJob {
+interface Listener<in E : Event> : CompletableJob {
     suspend fun onEvent(event: E): ListeningStatus
 }
 
@@ -47,7 +47,7 @@ interface Listener<in E : Subscribable> : CompletableJob {
 
 /**
  * 在指定的 [CoroutineScope] 下订阅所有 [E] 及其子类事件.
- * 每当 [事件广播][Subscribable.broadcast] 时, [handler] 都会被执行.
+ * 每当 [事件广播][Event.broadcast] 时, [handler] 都会被执行.
  *
  * 当 [handler] 返回 [ListeningStatus.STOPPED] 时停止监听.
  * 或 [Listener] complete 时结束.
@@ -57,7 +57,7 @@ interface Listener<in E : Subscribable> : CompletableJob {
  * 例如:
  * ```kotlin
  * runBlocking { // this: CoroutineScope
- *   subscribe<Subscribable> { /* 一些处理 */ } // 返回 Listener, 即 CompletableJob
+ *   subscribe<Event> { /* 一些处理 */ } // 返回 Listener, 即 CompletableJob
  * }
  * foo()
  * ```
@@ -66,7 +66,7 @@ interface Listener<in E : Subscribable> : CompletableJob {
  *
  * 要创建一个全局都存在的监听, 即守护协程, 请在 [GlobalScope] 下调用本函数:
  * ```kotlin
- * GlobalScope.subscribe<Subscribable> { /* 一些处理 */ }
+ * GlobalScope.subscribe<Event> { /* 一些处理 */ }
  * ```
  *
  *
@@ -75,52 +75,52 @@ interface Listener<in E : Subscribable> : CompletableJob {
  * bot.subscribe<Subscribe> { /* 一些处理 */ }
  * ```
  */
-inline fun <reified E : Subscribable> CoroutineScope.subscribe(crossinline handler: suspend E.(E) -> ListeningStatus): Listener<E> =
+inline fun <reified E : Event> CoroutineScope.subscribe(crossinline handler: suspend E.(E) -> ListeningStatus): Listener<E> =
     E::class.subscribeInternal(Handler { it.handler(it) })
 
 /**
  * 在指定的 [CoroutineScope] 下订阅所有 [E] 及其子类事件.
- * 每当 [事件广播][Subscribable.broadcast] 时, [listener] 都会被执行.
+ * 每当 [事件广播][Event.broadcast] 时, [listener] 都会被执行.
  *
  * 仅当 [Listener] complete 时结束.
  *
  * @see subscribe 获取更多说明
  */
-inline fun <reified E : Subscribable> CoroutineScope.subscribeAlways(crossinline listener: suspend E.(E) -> Unit): Listener<E> =
+inline fun <reified E : Event> CoroutineScope.subscribeAlways(crossinline listener: suspend E.(E) -> Unit): Listener<E> =
     E::class.subscribeInternal(Handler { it.listener(it); ListeningStatus.LISTENING })
 
 /**
  * 在指定的 [CoroutineScope] 下订阅所有 [E] 及其子类事件.
- * 仅在第一次 [事件广播][Subscribable.broadcast] 时, [listener] 会被执行.
+ * 仅在第一次 [事件广播][Event.broadcast] 时, [listener] 会被执行.
  *
  * 在这之前, 可通过 [Listener.complete] 来停止监听.
  *
  * @see subscribe 获取更多说明
  */
-inline fun <reified E : Subscribable> CoroutineScope.subscribeOnce(crossinline listener: suspend E.(E) -> Unit): Listener<E> =
+inline fun <reified E : Event> CoroutineScope.subscribeOnce(crossinline listener: suspend E.(E) -> Unit): Listener<E> =
     E::class.subscribeInternal(Handler { it.listener(it); ListeningStatus.STOPPED })
 
 /**
  * 在指定的 [CoroutineScope] 下订阅所有 [E] 及其子类事件.
- * 每当 [事件广播][Subscribable.broadcast] 时, [listener] 都会被执行, 直到 [listener] 的返回值 [equals] 于 [valueIfStop]
+ * 每当 [事件广播][Event.broadcast] 时, [listener] 都会被执行, 直到 [listener] 的返回值 [equals] 于 [valueIfStop]
  *
  * 可在任意时刻通过 [Listener.complete] 来停止监听.
  *
  * @see subscribe 获取更多说明
  */
-inline fun <reified E : Subscribable, T> CoroutineScope.subscribeUntil(valueIfStop: T, crossinline listener: suspend E.(E) -> T): Listener<E> =
+inline fun <reified E : Event, T> CoroutineScope.subscribeUntil(valueIfStop: T, crossinline listener: suspend E.(E) -> T): Listener<E> =
     E::class.subscribeInternal(Handler { if (it.listener(it) == valueIfStop) ListeningStatus.STOPPED else ListeningStatus.LISTENING })
 
 /**
  * 在指定的 [CoroutineScope] 下订阅所有 [E] 及其子类事件.
- * 每当 [事件广播][Subscribable.broadcast] 时, [listener] 都会被执行,
+ * 每当 [事件广播][Event.broadcast] 时, [listener] 都会被执行,
  * 如果 [listener] 的返回值 [equals] 于 [valueIfContinue], 则继续监听, 否则停止
  *
  * 可在任意时刻通过 [Listener.complete] 来停止监听.
  *
  * @see subscribe 获取更多说明
  */
-inline fun <reified E : Subscribable, T> CoroutineScope.subscribeWhile(valueIfContinue: T, crossinline listener: suspend E.(E) -> T): Listener<E> =
+inline fun <reified E : Event, T> CoroutineScope.subscribeWhile(valueIfContinue: T, crossinline listener: suspend E.(E) -> T): Listener<E> =
     E::class.subscribeInternal(Handler { if (it.listener(it) != valueIfContinue) ListeningStatus.STOPPED else ListeningStatus.LISTENING })
 
 // endregion
@@ -146,7 +146,7 @@ inline fun <reified E : Subscribable, T> CoroutineScope.subscribeWhile(valueIfCo
  */
 @ListenersBuilderDsl
 @Suppress("MemberVisibilityCanBePrivate", "unused")
-inline class ListenerBuilder<out E : Subscribable>(
+inline class ListenerBuilder<out E : Event>(
     @PublishedApi internal inline val handlerConsumer: CoroutineCoroutineScope.(Listener<E>) -> Unit
 ) {
     fun CoroutineCoroutineScope.handler(listener: suspend E.(E) -> ListeningStatus) {

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/events/BotEvents.kt

@@ -13,86 +13,120 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.contact.Group
 import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.contact.MemberPermission
+import net.mamoe.mirai.data.Packet
 import net.mamoe.mirai.event.Event
-import net.mamoe.mirai.utils.WeakRef
-import kotlin.properties.Delegates
 
-
-abstract class BotEvent : Event {
-    private lateinit var _bot: Bot
-    open val bot: Bot get() = _bot
-
-    constructor(bot: Bot) : super() {
-        this._bot = bot
-    }
-
-    constructor() : super()
+/**
+ * 有关一个 [Bot] 的事件
+ */
+interface BotEvent : Event {
+    val bot: Bot
 }
 
-class BotLoginSucceedEvent(bot: Bot) : BotEvent(bot)
-
-class BotOfflineEvent(bot: Bot) : BotEvent(bot)
+/**
+ * [Bot] 登录完成, 好友列表, 群组列表初始化完成
+ */
+data class BotLoginSucceedEvent(override val bot: Bot) : BotEvent
 
-class BotReadyEvent(bot: Bot) : BotEvent(bot)
+/**
+ * [Bot] 离线.
+ */
+data class BotOfflineEvent(override val bot: Bot) : BotEvent
 
-interface GroupEvent {
+/**
+ * 被挤下线
+ */
+data class ForceOfflineEvent(
+    override val bot: Bot,
+    val title: String,
+    val tips: String
+) : BotEvent, Packet
+
+/**
+ * 有关群的事件
+ */
+interface GroupEvent : BotEvent {
     val group: Group
+    override val bot: Bot
+        get() = group.bot
 }
 
-class AddGroupEvent(bot: Bot, override val group: Group) : BotEvent(bot), GroupEvent
+data class AddGroupEvent(override val group: Group) : BotEvent, GroupEvent
 
-class RemoveGroupEvent(bot: Bot, override val group: Group) : BotEvent(bot), GroupEvent
+data class RemoveGroupEvent(override val group: Group) : BotEvent, GroupEvent
 
-class BotGroupPermissionChangeEvent(
-    bot: Bot,
+data class BotGroupPermissionChangeEvent(
     override val group: Group,
     val origin: MemberPermission,
     val new: MemberPermission
-) : BotEvent(bot), GroupEvent
+) : BotEvent, GroupEvent
+
 
 interface GroupSettingChangeEvent<T> : GroupEvent {
+    val operator: Member
     val origin: T
     val new: T
+
+    override val group: Group
+        get() = operator.group
 }
 
-class GroupNameChangeEvent(
-    bot: Bot,
-    override val group: Group,
+data class GroupNameChangeEvent(
+    override val operator: Member,
     override val origin: String,
     override val new: String
-) : BotEvent(bot), GroupSettingChangeEvent<String>
+) : BotEvent, GroupSettingChangeEvent<String>
 
-class GroupMuteAllEvent(
-    bot: Bot,
-    override val group: Group,
+/**
+ * 群 "全员禁言" 功能开启
+ */
+data class GroupMuteAllEvent(
+    override val operator: Member,
     override val origin: Boolean,
     override val new: Boolean
-) : BotEvent(bot), GroupSettingChangeEvent<Boolean>
+) : BotEvent, GroupSettingChangeEvent<Boolean>
 
-class GroupConfessTalkEvent(
-    bot: Bot,
-    override val group: Group,
+data class GroupConfessTalkEvent(
+    override val operator: Member,
     override val origin: Boolean,
     override val new: Boolean
-) : BotEvent(bot), GroupSettingChangeEvent<Boolean>
+) : BotEvent, GroupSettingChangeEvent<Boolean>
+
 
+/**
+ * 有关群成员的事件
+ */
 interface GroupMemberEvent : GroupEvent {
     val member: Member
     override val group: Group
         get() = member.group
 }
 
-class MemberJoinEvent(bot: Bot, override val member: Member) : BotEvent(bot), GroupMemberEvent
-
-class MemberLeftEvent(bot: Bot, override val member: Member) : BotEvent(bot), GroupMemberEvent
+/**
+ * 成员加入群的事件
+ */
+data class MemberJoinEvent(override val member: Member) : BotEvent, GroupMemberEvent
 
-class MemberMuteEvent(bot: Bot, override val member: Member) : BotEvent(bot), GroupMemberEvent
+/**
+ * 成员离开群的事件
+ */
+sealed class MemberLeftEvent : BotEvent, GroupMemberEvent {
+    /**
+     * 成员被踢出群
+     */
+    data class Kick(override val member: Member, val operator: Member) : MemberLeftEvent()
+
+    /**
+     * 成员主动离开
+     */
+    data class Quit(override val member: Member) : MemberLeftEvent()
+}
 
-class MemberPermissionChangeEvent(
-    bot: Bot,
+data class MemberPermissionChangeEvent(
+    override val bot: Bot,
     override val member: Member,
     val origin: MemberPermission,
     val new: MemberPermission
-) : BotEvent(bot), GroupMemberEvent
+) : BotEvent, GroupMemberEvent
 
 

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/events/ForceOfflineEvent.kt

-package net.mamoe.mirai.event.events
-
-import net.mamoe.mirai.Bot
-import net.mamoe.mirai.data.Packet
-
-/**
- * 被挤下线
- */
-data class ForceOfflineEvent(
-    override val bot: Bot,
-    val title: String,
-    val tips: String
-) : BotEvent(), Packet
\ No newline at end of file

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/data/MuteEvent.kt → mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/events/MuteEvent.kt

@@ -7,10 +7,11 @@
  * https://github.com/mamoe/mirai/blob/master/LICENSE
  */
 
-package net.mamoe.mirai.data
+package net.mamoe.mirai.event.events
 
 import net.mamoe.mirai.contact.Group
 import net.mamoe.mirai.contact.Member
+import net.mamoe.mirai.data.EventPacket
 
 
 // region mute

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt

@@ -10,9 +10,9 @@
 package net.mamoe.mirai.event.internal
 
 import kotlinx.coroutines.*
+import net.mamoe.mirai.event.Event
 import net.mamoe.mirai.event.Listener
 import net.mamoe.mirai.event.ListeningStatus
-import net.mamoe.mirai.event.Subscribable
 import net.mamoe.mirai.utils.LockFreeLinkedList
 import net.mamoe.mirai.utils.MiraiDebugAPI
 import net.mamoe.mirai.utils.MiraiLogger
@@ -29,14 +29,14 @@ import kotlin.reflect.KClass
 var EventDisabled = false
 
 @PublishedApi
-internal fun <L : Listener<E>, E : Subscribable> KClass<out E>.subscribeInternal(listener: L): L {
+internal fun <L : Listener<E>, E : Event> KClass<out E>.subscribeInternal(listener: L): L {
     this.listeners().addLast(listener)
     return listener
 }
 
 @PublishedApi
 @Suppress("FunctionName")
-internal fun <E : Subscribable> CoroutineScope.Handler(handler: suspend (E) -> ListeningStatus): Handler<E> {
+internal fun <E : Event> CoroutineScope.Handler(handler: suspend (E) -> ListeningStatus): Handler<E> {
     return Handler(coroutineContext[Job], coroutineContext, handler)
 }
 
@@ -45,7 +45,7 @@ private inline fun inline(block: () -> Unit) = block()
  * 事件处理器.
  */
 @PublishedApi
-internal class Handler<in E : Subscribable>
+internal class Handler<in E : Event>
 @PublishedApi internal constructor(parentJob: Job?, private val subscriberContext: CoroutineContext, @JvmField val handler: suspend (E) -> ListeningStatus) :
     Listener<E>, CompletableJob by Job(parentJob) {
 
@@ -79,21 +79,21 @@ internal class Handler<in E : Subscribable>
 /**
  * 这个事件类的监听器 list
  */
-internal fun <E : Subscribable> KClass<out E>.listeners(): EventListeners<E> = EventListenerManager.get(this)
+internal fun <E : Event> KClass<out E>.listeners(): EventListeners<E> = EventListenerManager.get(this)
 
-internal class EventListeners<E : Subscribable> : LockFreeLinkedList<Listener<E>>()
+internal class EventListeners<E : Event> : LockFreeLinkedList<Listener<E>>()
 
 /**
  * 管理每个事件 class 的 [EventListeners].
  * [EventListeners] 是 lazy 的: 它们只会在被需要的时候才创建和存储.
  */
 internal object EventListenerManager {
-    private data class Registry<E : Subscribable>(val clazz: KClass<E>, val listeners: EventListeners<E>)
+    private data class Registry<E : Event>(val clazz: KClass<E>, val listeners: EventListeners<E>)
 
     private val registries = LockFreeLinkedList<Registry<*>>()
 
     @Suppress("UNCHECKED_CAST")
-    internal fun <E : Subscribable> get(clazz: KClass<out E>): EventListeners<E> {
+    internal fun <E : Event> get(clazz: KClass<out E>): EventListeners<E> {
         return registries.filteringGetOrAdd({ it.clazz == clazz }) {
             Registry(
                 clazz,
@@ -105,7 +105,7 @@ internal object EventListenerManager {
 
 // inline: NO extra Continuation
 @Suppress("UNCHECKED_CAST")
-internal suspend inline fun Subscribable.broadcastInternal() {
+internal suspend inline fun Event.broadcastInternal() {
     if (EventDisabled) return
 
     callAndRemoveIfRequired(this::class.listeners())
@@ -113,18 +113,18 @@ internal suspend inline fun Subscribable.broadcastInternal() {
     var supertypes = this::class.supertypes
     while (true) {
         val superSubscribableType = supertypes.firstOrNull {
-            it.classifier as? KClass<out Subscribable> != null
+            it.classifier as? KClass<out Event> != null
         }
 
         superSubscribableType?.let {
-            callAndRemoveIfRequired((it.classifier as KClass<out Subscribable>).listeners())
+            callAndRemoveIfRequired((it.classifier as KClass<out Event>).listeners())
         }
 
         supertypes = (superSubscribableType?.classifier as? KClass<*>)?.supertypes ?: return
     }
 }
 
-private suspend inline fun <E : Subscribable> E.callAndRemoveIfRequired(listeners: EventListeners<E>) {
+private suspend inline fun <E : Event> E.callAndRemoveIfRequired(listeners: EventListeners<E>) {
     // atomic foreach
     listeners.forEach {
         if (it.onEvent(this) == ListeningStatus.STOPPED) {

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/Message.kt

@@ -59,14 +59,14 @@ interface Message {
     infix fun eq(other: Message): Boolean = this == other
 
     /**
-     * 将 [stringValue] 与 [other] 比较
+     * 将 [toString] 与 [other] 比较
      */
     infix fun eq(other: String): Boolean = this.toString() == other
 
     operator fun contains(sub: String): Boolean = false
 
     /**
-     * 把 [this] 连接到 [tail] 的头部. 类似于字符串相加.
+     * 把 `this` 连接到 [tail] 的头部. 类似于字符串相加.
      *
      * 例:
      * ```kotlin
@@ -92,7 +92,7 @@ interface Message {
     override fun toString(): String
 
     operator fun plus(another: Message): MessageChain = this.followedBy(another)
-    operator fun plus(another: String): MessageChain = this.followedBy(another.toString().toMessage())
+    operator fun plus(another: String): MessageChain = this.followedBy(another.toMessage())
     // `+ ""` will be resolved to `plus(String)` instead of `plus(CharSeq)`
     operator fun plus(another: CharSequence): MessageChain = this.followedBy(another.toString().toMessage())
 }

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/event/SubscribersJvm.kt

@@ -17,6 +17,6 @@ package net.mamoe.mirai.event
 object Events {
     /*
     @JvmStatic
-    fun <E : Subscribable> subscribe(type: Class<E>, handler: suspend (E) -> ListeningStatus) =
+    fun <E : Event> subscribe(type: Class<E>, handler: suspend (E) -> ListeningStatus) =
         runBlocking { type.kotlin.subscribe(handler) }*/
 }

mirai-core/src/jvmTest/kotlin/net/mamoe/mirai/event/EventTests.kt

@@ -12,12 +12,11 @@ package net.mamoe.mirai.event
 import kotlinx.coroutines.CompletableJob
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.runBlocking
-import net.mamoe.mirai.test.shouldBeEqualTo
 import kotlin.system.exitProcess
 import kotlin.test.Test
 
 
-class TestEvent : Subscribable {
+class TestEvent : Event {
     var triggered = false
 }
 
@@ -46,7 +45,7 @@ class EventTests {
     }
 
 
-    open class ParentEvent : Subscribable {
+    open class ParentEvent : Event {
         var triggered = false
     }
 

mirai-demos/mirai-demo-gentleman/src/main/kotlin/demo/gentleman/Main.kt

@@ -20,7 +20,7 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.alsoLogin
 import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.contact.MemberPermission
-import net.mamoe.mirai.event.Subscribable
+import net.mamoe.mirai.event.Event
 import net.mamoe.mirai.event.events.ReceiveFriendAddRequestEvent
 import net.mamoe.mirai.event.subscribeAlways
 import net.mamoe.mirai.event.subscribeGroupMessages
@@ -48,8 +48,8 @@ suspend fun main() {
         // override config here.
     }.alsoLogin()
 
-    // 任何可以监听的对象都继承 Subscribable, 因此这个订阅会订阅全部的事件.
-    GlobalScope.subscribeAlways<Subscribable> {
+    // 任何可以监听的对象都继承 Event, 因此这个订阅会订阅全部的事件.
+    GlobalScope.subscribeAlways<Event> {
         //bot.logger.verbose("收到了一个事件: $this")
     }