https://mattbolitho.github.io/tags/design/Recent content in Design on Matt BolithoHugo -- gohugo.ioen-GBMatt BolithoSun, 08 Sep 2024 19:00:00 +0000https://mattbolitho.github.io/posts/structured-validation-rules-in-cpp/Sun, 08 Sep 2024 19:00:00 +0000https://mattbolitho.github.io/posts/structured-validation-rules-in-cpp/Validation is a common problem when dealing with any data provided by a user. Even when developing a library, you likely provide custom data types for consuming developers, which are equally (if not more!) untrustworthy. In a personal project, I was dealing with validating user provided numerical optimization problems. For the sake of brevity in this post, let’s assume these problems look like this: 1struct OptimizationProblem 2{ 3 std::vector<double> XLb; 4 std::vector<double> XUb; 5 std::function<double(std::span<double const>)> Eval; 6}; OptimizationProblem contains upper and lower bounds for the primal variables we are optimizing over.