composer.cpp

struct Comp
{
	template <class F1, class F2>
	auto operator()(F1&& lhs, F2&& rhs)
	{
		return [
			lhs = perfect_capture_t<F1>(std::forward<F1>(lhs)),
			rhs = perfect_capture_t<F2>(std::forward<F2>(rhs))
		](auto&&... args)
		{
			return lhs(rhs(std::forward<decltype(args)>(args)...));
		};
	}
};