From 618e6d9c4ba9b5e75c955577a9cd18d31cc81c4e Mon Sep 17 00:00:00 2001
From: Him188 <Him188@mamoe.net>
Date: Tue, 31 Dec 2019 16:38:11 +0800
Subject: [PATCH] Explict `operator` modifier for `fun subList`

---
 .../kotlin/net.mamoe.mirai/message/data/MessageChain.kt       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/MessageChain.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/MessageChain.kt
index 45c72c825..df7592cff 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/MessageChain.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/data/MessageChain.kt
@@ -278,7 +278,7 @@ internal inline class MessageChainImpl constructor(
      * Elements will not be instances of [MessageChain]
      */
     private val delegate: MutableList<Message>
-) : Message, MutableList<Message>,
+) : Message, MutableList<Message>, // do not `by delegate`, bcz Inline class cannot implement an interface by delegation
     MessageChain {
 
     constructor(vararg messages: Message) : this(messages.toMutableList())
@@ -316,7 +316,7 @@ internal inline class MessageChainImpl constructor(
     override fun retainAll(elements: Collection<Message>): Boolean = delegate.retainAll(elements)
     override fun set(index: Int, element: Message): Message = delegate.set(index, element)
     override fun subList(fromIndex: Int, toIndex: Int): MutableList<Message> = delegate.subList(fromIndex, toIndex)
-    override fun iterator(): MutableIterator<Message> = delegate.iterator()
+    override operator fun iterator(): MutableIterator<Message> = delegate.iterator()
     override operator fun contains(element: Message): Boolean = delegate.contains(element)
     override val size: Int get() = delegate.size
     // endregion