Roborock Q10 S5+
Finally, the fact that cancelation uses what you might call an "in-band" signalling mechanism means that there's no obvious way for libraries (including the standard library) to handle generic cancelation, even for tasks they initiate, unless they constrain the signatures of functions they're calling. For example, a concurrent AsyncIterator.prototype.map is invoking a generic async mapping function; it would be nice if closing the iterator early (with .return) could cancel the tasks created by invoking said function, but there is no obvious way to do this unless the iterator internally creates an AbortController and passes its signal to the mapping functions.
。关于这个话题，chrome提供了深入分析
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#[serde(deserialize_with = "comma_separated")]