I am learning C++20, and there are a question about coroutines. Suppose there is a function that uses a callback to iterate over the data:

void get_number( function<void(int)> callback )
{
    for(int i=0; i<10; i++) callback(i);       
}

Is it possible to turn it into generator using co_yield in C++20 like below code?

generator<int> co_get_number()
{
    auto co_callback = [](int i){
       // is it possible use co_yield here?
       // co_yield i;
    }
    get_number(co_callback);
}
    
int main()
{
    for(int i : co_get_number())
    {
        cout << i << endl;
    }
}

Thanks to chris, since the C++20 coroutine is stackless, it cannot be suspended within a nested stackframe. However, I think this requirement is more practical, is there some neat way to make stackless coroutine also do that?