在 scope 之外的本地 object 之后，异步成员 function 会发生什么情况？

Question

For example, if I can call an async function like this:

{
    Example example;
    example.asyncFuncInside();
}

Since the object is freed after the scope, will it have any risks on the ongoing task running inside the async function?

Answer 1

This cannot be answered in the current form. If the "async" is a detached std::thread , nothing bad happens. If the async function was implemented using std::async , on the other hand, then asyncFuncInside would return its std::future , and since that's ignored the dtor of std::future would block.