Fix This std::async Call

Question

Having trouble with std::async , every way I write it turns out to be illegal. Anyone got any suggestions?

PS: It's an async IP range scanner.

bool PortCheck(std::string ip, int port)
{

}

std::vector<std::pair<std::string, std::future<bool>>> JobPool;

std::future<bool > f = PortCheck(argStartAddress, argPort);


JobPool.push_back(std::make_pair(
    argStartAddress,
    f
));

Answer 1

std::future<bool> f = std::async(PortCheck, argStartAddress, argPort);

JobPool.push_back(std::make_pair(
    argStartAddress,
    std::move(f)  // note std::move
));