不想基于QtConcurrent實作，希望能夠使用標準庫實作，std::thread沒有問題，但是std::async卻做不到，但是用boost::async卻可以，這是為什么？請大俠賜教
uj5u.com熱心網友回復：
沒有代碼，只能猜，可能你的呼叫不對，boost 和 stl 可能行為不一樣Boost:
If this policy is specified together with other policies, such as when using a policy value of launch::async | launch::deferred, implementations should defer invocation or the selection of the policy when no more concurrency can be effectively exploited.
STL:
If both the std::launch::async and std::launch::deferred flags are set in policy, it is up to the implementation whether to perform asynchronous execution or lazy evaluation.
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標籤：Qt