Function circular_less_than

concurrentqueue.h:490–496

	
	template<typename T>
	static inline bool circular_less_than(T a, T b)
	{
		static_assert(std::is_integral<T>::value && !std::numeric_limits<T>::is_signed, "circular_less_than is intended to be used only with unsigned integer types");
		return static_cast<T>(a - b) > static_cast<T>(static_cast<T>(1) << (static_cast<T>(sizeof(T) * CHAR_BIT - 1)));
		// Note: extra parens around rhs of operator<< is MSVC bug: https://developercommunity2.visualstudio.com/t/C4554-triggers-when-both-lhs-and-rhs-is/10034931
		//       silencing the bug requires #pragma warning(disable: 4554) around the calling code and has no effect when done here.
	}
	
	template<typename U>
	static inline char* align_for(char* ptr)