Back to Basics: Master C++ Friendship - Mateusz Pusz - CppCon 2025

Video Description

https://cppcon.org --- Back to Basics: Master C++ Friendship - Mateusz Pusz - CppCon 2025 --- C++ offers a rich set of access specifiers to control the visibility of class members. However, the friend keyword introduces a unique and often misunderstood concept. This talk explores the nuances of friendship, examining its role in code design, testing, and compilation performance optimization. We'll delve into the intricacies of friendship, exploring its benefits and potential pitfalls. We'll examine how to leverage friendship effectively, discuss best practices, and uncover hidden gems and common misconceptions. We will see how friendship affects name lookup and compile-time error messages. We will discuss best practices for using it effectively and learn how to avoid or resolve compilation problems that may occur when C++ templates are involved. By the end of this session, you'll have a solid grasp of friendship and be able to use it to write more elegant, efficient, and maintainable C++ code. --- Slides: https://github.com/CppCon/CppCon2025/blob/main/Presentations/Back_To_Basics_Friendship.pdf Work at Hudson River Trading (HRT): https://tinyurl.com/safxfctf --- Mateusz Pusz A software architect, principal engineer, and security champion with over 20 years of experience designing, writing, and maintaining C++ code for fun and a living. A trainer with over 15 years of C++ teaching experience, a consultant, a conference speaker, and an evangelist. His main areas of interest and expertise are Modern C++, code performance, low latency, safety, and maintainability.Mateusz worked at Intel for 13 years and is now a Principal Software Engineer and the head of the C++ Competency Center at EPAM Systems. He is also the founder of Train IT, which provides dedicated C++ training and consulting services to corporations worldwide.Mateusz contributes to and is an active voting member of the ISO C++ Committee (WG21), where he, along with the top C++ experts worldwide, shapes the future of the C++ language. --- CppCon is the annual, week-long face-to-face gathering for the entire C++ community. The conference is organized by the C++ community for the community. You will enjoy inspirational talks and a friendly atmosphere designed to help attendees learn from each other, meet interesting people, and generally have a stimulating experience. Taking place this year in Aurora, Colorado, near the Denver airport, and including multiple diverse tracks, the conference will appeal to anyone from C++ novices to experts. Annual CppCon Conference - https://www.cppcon.org https://www.linkedin.com/company/cppcon https://x.com/cppcon https://www.facebook.com/CppConference https://www.reddit.com/r/cppcon/ https://mastodon.social/@CppCon --- Videos Filmed & Edited by Bash Films: http://www.BashFilms.com YouTube Channel Managed by Digital Medium Ltd: https://events.digital-medium.co.uk --- #cpp #cplusplus #programming #coding #softwareengineering