async_enum_values.cpp

#include <iostream>
#include <future>

int main()
{
    std::cout << "Launch async = " << static_cast<int>(std::launch::async) << '\n';
    std::cout << "Launch deferred = " << static_cast<int>(std::launch::deferred) << '\n';
    std::cout << "async OR deferred = " << static_cast<int>(std::launch::async|std::launch::deferred) << '\n';
}
/*
Output
Launch asyc = 1
Launch deferred = 2
async OR deferred = 3
*/