Function deref_noexcept

deps/concurrentqueue/concurrentqueue.h:542–545

	
	template<typename It>
	static inline auto deref_noexcept(It& it) MOODYCAMEL_NOEXCEPT -> decltype(*it)
	{
		return *it;
	}
	
#if defined(__clang__) || !defined(__GNUC__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
	template<typename T> struct is_trivially_destructible : std::is_trivially_destructible<T> { };