If you have ever used iterators in C# or Visual Basic, then this is essentially the same thing. You would need to enable the new experimental /await compiler option, same as in the previous blog entry.
std::experimental::generator<int> evens(size_t count)
{
using namespace std::chrono;
for (size_t i = 1; i <= count; i++)
{
yield i * 2;
std::cout << "yielding..." << std::endl;
std::this_thread::sleep_for(1s);
}
}
Calling this method would be fairly straightforward.
void main_yield()
{
for (auto ev : evens(7))
{
std::cout << ev << std::endl;
}
}
And here’s the expected output.
I added the console output to demonstrate the laziness of the generator.
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