The Absurdity of Error Handling: Finding a Purpose for Errors in Safety-Critical SYCL Erik Tomusk CppCon 2023 October 5, 2023© 2023 Codeplay Software Ltd. Codeplay Corporate Slide 2© 2023 Codeplay explicitly stated© 2023 Codeplay Software Ltd. Outline • Definition of Safety • Definition of Error Handling • Case Study • Why is this Important? • Is it Really so bad? • What does this mean for SYCL execution time (in mainstream compilers) 17Definition of Error Handling 18© 2023 Codeplay Software Ltd. Definition of Error Handling • Exceptions and error codes are sometimes used for reporting or information

Modern C++ Handling Phil Nash Error2018 2019series disappointments of a (total) Part 1int parse_int(std::string_view number)// TODO: +, -, digit separators? int acc = 0; for(char c first_digit = false; } return ParseStatus::Numeric; } 42 42 (starts with an int) Error: x42 is not an int test("42"); test("42x"); test("x42"); [[nodiscard]] void test(std::string_view int)”, i); break; case ParseStatus::NonNumeric: std::println(“Error: {} is not an int", str); break; } }int parse_int(std::string_view number) {

Design patterns for error handling in C++ programs using parallel algorithms and executors Mark Hoemmen* mhoemmen@stellarscience.com CppCon 2020 * hoʊ’mən, or hœm’mən; he/himWho am I? • > 10 years Started new job at Stellar Science in March Eschew raw pointersOutline • Parallelism makes error handling harder… • …C++ parallel algorithms and tasks specifically • Message Passing Interface (MPI): Steve Jurvetson)Parallel hinders error handling • … because parallelism relaxes execution order – Deliberately, to improve performance • Errors interrupt execution; handling constrains order • Errors could

CppCon 2024 Customizing Compilation Error Messages Formatting a Compile-Time String During Substitution Failure Patrick Roberts, P.E. Principal Software Engineer 1CppCon 2024 What problem does solve? 2CppCon 2024 3CppCon 2024 4CppCon 2024 5CppCon 2024 6 Guidelines for a helpful error message Where is the error? ✅ What is wrong? ✅ How can it be fixed? ❌CppCon 2024 7CppCon 2024 8CppCon 2024 9

Message Handling with Boolean Algebra Ben Deane / CppCon / 2024-09-16 1Alternative Title "The Unreasonable Effectiveness of Boolean Algebra in Software Design, Showing the Particular Application of of a Message Handling Library, with an Excursion into the Roots of Programming" 2Frontmatter No AI/LLM was used in the creation of this talk. Code is simplified for slides; may have some errors in ] SVG diagrams for resolution-independence 4What this talk is about The workings of a message-handling library. How messages and the fields in them are specified. Efficiently identifying (with matchers)

Using Kubernetes for handling second screen experience of european tv show About us Thomas Hector Head of IT Operations Key Qualifications ● 12+ years’ experience with development and operations operations ● Automating everything ● Been handling Kubernetes clusters in production for 2 years Jan-Erik Revsbech CTO Key Qualifications ● 20+ year of experience in web-development & operation/hosting

std::shared_ptr response) { if (map_.get_data().size() == 0) { RCLCPP_ERROR_STREAM(this->get_logger(), "MAP IS EMPTY!!"); response->code.code = example_srvs::msg::GetPat _OCCUPANCY_MAP; response->path = std_msgs::msg::UInt8MultiArray(); return; } /* More error pre-checks */ auto const start = Position{request->start.data[0], request->start.data[1]}; auto std::shared_ptr response) { if (map_.get_data().size() == 0) { RCLCPP_ERROR_STREAM(this->get_logger(), "MAP IS EMPTY!!"); response->code.code = example_srvs::msg::GetPat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 1.11 Configuration Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 1.12 Signals implemented in Flask itself. Numerous extensions provide database integration, form validation, upload handling, various open authentication technologies, and more. Flask may be “micro”, but it’s ready for pro- not exist, there are multiple reasons this might be the case. First of all you need to look at the error message. Old Version of Flask Versions of Flask older than 0.11 used to have different ways to start

Accessing and Modifying Sessions Testing JSON APIs Testing CLI Commands Application Errors Error Logging Tools Error handlers Logging Debugging Application Errors When in Doubt, Run Manually Working with Configuration Email Errors to Admins Injecting Request Information Other Libraries Configuration Handling Configuration Basics Environment and Debug Features Builtin Configuration Values Configuring from Preservation on Error Notes On Proxies Modular Applications with Blueprints Why Blueprints? The Concept of Blueprints My First Blueprint Registering Blueprints Blueprint Resources Building URLs Error Handlers

localization Time zone Localized resources International sites Summary Error handling, debugging and testing Error handling Debugging by using GDB Write test cases Summary Deployment and maintenance reason that this (thankfully!) is a syntax error func main () { } because the compiler adds a semi colon at the end of main() which is a syntax error and as stated above, it helps avoid religious `hello world` ` will not escape any characters in a string. Error types Go has one error type for purpose of dealing with error messages. There is also a package called errors to handle errors