std::experimental:: packaged_task
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std::experimental::packaged_task
可能指：
-
std::experimental::fundamentals_v1::packaged_task或std::experimental::fundamentals_v2::packaged_task，由 库基础技术规范 提供的 std::packaged_task 修改版本，支持类型擦除分配器； -
std::experimental::concurrency_v1::packaged_task，由 并发技术规范 提供的std::packaged_task修改版本，其get_future()成员函数返回该技术规范提供的改进版 std::experimental::future 。