Define hassle-free. In readability of user code? Yes. In getting clean compiler errors? No. One example would be Eigen: https://eigen.tuxfamily.org/index.php?t

Define hassle-free. In readability of user code? Yes. In getting clean compiler errors? No. One example would be Eigen: https://eigen.tuxfamily.org/index.php?title=Main_Page https://eigen.tuxfamily.org/index.php?title=Main_Page See also their page on lazy evaluation: https://eigen.tuxfamily.org/dox/TopicLazyEvaluation.html https://eigen.tuxfamily.org/dox/TopicLazyEvaluation.html Of course, C++ is powerful enough that using specific tools can make the expression template abstraction fall apart (e.g. auto), but fundamentally you can write matrix code very cleanly and get great lazy-evaluated performance.