关于运算符重载：Kotlin Coroutines中的“ +”？

“+” in Kotlin Coroutines?

这是Kotlin Coroutines通过显式作业取消的示例代码：

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fun main(args: Array<String>) = runBlocking<Unit> {
val job = Job() // create a job object to manage our lifecycle

// now launch ten coroutines for a demo, each working for a different time
val coroutines = List(10) { i ->
// they are all children of our job object
launch(coroutineContext + job) { // we use the context of main runBlocking thread, but with our own job object
delay((i + 1) * 200L) // variable delay 200ms, 400ms, ... etc
println("Coroutine $i is done")
}
}
println("Launched ${coroutines.size} coroutines")
delay(500L) // delay for half a second
println("Cancelling the job!")
job.cancelAndJoin() // cancel all our coroutines and wait for all of them to complete
}

我对表达式coroutineContext + job中的+感到困惑吗？

它在做什么？是运营商覆盖吗？

相关讨论

这是运算符重载的一个示例。
下面显示了方法CoroutineContext::plus的文档：

1	open operator fun plus(context: CoroutineContext): CoroutineContext

Returns a context containing elements from this context and elements from other context. The elements from this context with the same key as in the other one are dropped.

它基本上是两种情况的合并。