相关代码:

int SomeCollection::Enumerate()
{
    for (int i=0; i<4; i++)
        yield_return(rand());
    return rand();
}

需要自定义类：

template <class T, class R>
void Enumerator::Return(const R &value)
{
    Enumerator *E=(Enumerator *)GetFiberData(); // get the context, stored in fiber data

    if (E->Fiber!=GetCurrentFiber()) // check, if it is the same fiber - 

                                        // Fiber field is spoofed at cleanup

    {
        *E->pResult=value; // set the result

        SwitchToFiber(E->Fiber); // return to main fiber

    }
}