Customization Methods: Connecting User And Library Code Inbal Levi ## Who Am I? • A C++ Developer at Millennium. • Active member of ISO C++ work group (WG21): • Library Evolution Work Group Chair • Israeli this talk • The presentation presents my views and opinions only. ## Outline Part 0: What is a Library Part I: What are Customization Points (+ Some History...) Part II: An overview of CPs methods (+ Part 0: What is a Library Part 0: What is a Library  @@@ All of library code is in LibSpace, user code without frame is

Linear Algebra with The Eigen C++ Library ## +24 ## DANIEL HANSON ## Outline • A short history – linear algebra and C++ (1998 – Present) • The Eigen C++ Template Library for Linear Algebra • Linear Algebra Disclaimers/Caveats • This presentation is on solving problems using • The Eigen linear algebra library • stdBLAS in C++26 • Not affiliated with Eigen but have used it in financial programming and teaching essentially were: • Write your own Matrix class and operations • Convince your boss to buy a commercial library ## A Little History: Open-Source Libraries ## • Boost uBLAS (BLAS: “Basic Linear Algebra Subroutines”)

# Top 5 improvements to Debugging Go Code in VS Code in the last year Ramya Rao Software Engineer, Microsoft Maintainer of the Go plugin to VS Code ## Add/remove breakpoints when in the middle of debugging

## +21 ## Code Analysis++ ## ANASTASIA KAZAKOVA ## 20 21 October 24-29 • Anastasia Kazakova, @anastasiak2512 C++ Dev: Embedded, Networking C++ Tools PMM and .NET Tools Marketing Lead, JetBrains - UG: https://www.meetup.com/St-Petersburg-CPP-User-Group/ C++ Russia: https://cppconf.ru/en/ ## Why Code Analysis? ## Software Quality While preparing for my workshop at #CppOnSea, I want to ask you: reply about software quality. Readability Repeatable tests SW helps solving Maintainability Expressive code less UB problems Simplicity tools Robustness The Last Spike Work as intended fuzzer Orthogonality

+23 ## Better Code: Contracts ## SEAN PARENT & DAVE ABRAHAMS ## 20 23 October 01 - 06  ## Better Code: Contracts Dave Co-creator Documentation > Code  Local reasoning is the idea that the reader can make sense of the code directly in front of them them, without going on a journey discovering how the code works. ## —Nathan Gitter (https://medium.com/@nathangitter/local-reasoning-in-swift-6782e459d) ## Local reasoning | The tower of abstraction

## +24 ## Improving Our Safety With a Quantities and Units Library ## MATEUSZ PUSZ ## The future is here  ## The future fundamental types – updating the core language rules – providing safer high-level abstractions in the library ## C++ developers needs help • Many C++ engineers are expected to write life-critical software today • Training alone will not solve the issue of mistakes caused by confusing units or quantities - Code handling the physical computation is often written by domain experts such as physicists that are not

## A Physical Units Library For the Next C++ Mateusz Pusz September 15, 2020 ## Motivation, Existing Practice, Challenges  slide number. ## QUICK START ## Physical Units library in a nutshell // simple numeric operations static_assert(10_q_km / 2 == 5_q_km); ## Physical Units library in a nutshell ## // simple numeric operations static_assert(1_q_h == 3600_q_s); static_assert(1_q_km + 1_q_m == 1001_q_m); ## Physical Units library in a nutshell // simple numeric operations static_assert(10_q_km / 2 == 5_q_km); // unit conversions

cppcon_add_library(basic LIBRARIES Asio::asio) add_subdirectory(tests)

stdx::interval, a library for intervals on totally ordered sets Eric Hughes, Meadhbh Hamrick ## I n brief stdx::interval implements the mathematical sense of an interval on a totally ordered set. The library reasons reasons about intervals as sets, not as interval expressions. The library is header-only and targets C++20. It is available under the MIT License. ## Features ## Predicates Membership. Determine if a point \infty,b](-\infty,b)(-\infty,+\infty) Generic. The library handles the differences between discrete (e.g. int and other integral types) and continuous (string

## GARMIN $ ^{®} $ ## Changing Legacy Code with Confidence: ## Practical Advice for Maintaining and Migrating Working Code ## Part 0: Legacy Code ## Legacy code has value • It works $ ^{*} $ It may making the company money • One person's bug is another's critical feature ## The Legacy of Code • Best practices and languages change • Developers cycle through projects • Features added/removed/re-added • Supporting tools change ## Goals of this talk • Preserve working code • Introduce testing • Gradual improvement • Make code self documenting • Instill confidence in changes • Develop for maintenance