Method try_dequeue

benchmarks/stdqueue.h:25–34

	}
	
	inline bool try_dequeue(T& item)
	{
		if (q.empty()) {
			return false;
		}
		
		item = std::move(q.front());
		q.pop();
		return true;
	}
	
	// Dummy token methods (not used)
	bool enqueue(producer_token_t const&, T const&) { return false; }