Thank you mirek for all the hard work!

I have a question. In CoWork.h, line 186, etc,

		void Do(Function&& f, Args&&... args) { co.Do([=]() { ret = f(args...); }); }

shouldn't it be something like

void Do(Function&& f, Args&&... args) { co.Do([=]() { ret = f(std::forward<Args>(args)...); }); }

for perfect forwarding to actually work?

#include <Core/Core.h>

using namespace Upp;

CONSOLE_APP_MAIN
{
	auto a = Async([](int n) -> double {
		double f = 1;
		for(int i = 2; i <= n; i++)
			f *= i;
		return f;
	}, 100);
}