https://cppcon.org
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Back to Basics: C++ Concepts - Jeff Garland - CppCon 2025
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C++20 introduced concepts as a first-class language feature, formalizing a long-standing tradition of template-based constraints in modern C++. Concepts offer a new level of clarity, safety, and expressiveness—and they’re now fully supported by compilers and the standard library.
This tutorial takes a practical, hands-on approach to understanding and applying concepts in real-world C++ projects. We'll begin with the fundamentals: understanding concept definitions and the requires keyword. Then we'll explore the application of concepts from a library user point of view. Including as a variable declaration, return values, and function parameters. And finally, we'll survey and apply c++20 standard library concepts to typical development of a typical c++ class.
In Part II, we'll dig into writing custom concepts. We’ll refactor a function to work with concepts, using this as a springboard to examine design choices when applying concepts to function interfaces. We’ll also design a reusable concept to demonstrate how concepts can improve the structure and clarity of libraries that work with families of related types.
Finally, we’ll reflect on how concepts can influence overall design patterns in C++, including their potential to improve readability, diagnostics, and long-term maintainability.
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Slides: https://github.com/CppCon/CppCon2025/...
Work at Hudson River Trading (HRT): https://tinyurl.com/safxfctf
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Jeff Garland
Jeff Garland has worked on many large-scale, distributed software projects over the past 30+ years. The systems span many different domains including telephone switching, industrial process control, satellite ground control, ip-based communications, and financial systems. He has written C++ networked code for several large systems including the development high performance network servers and data distribution frameworks. Mr. Garland’s interest in Boost started in 2000 as a user. Since then he has developed Boost.date_time, become a moderator, served as a review manager for several libraries (including asio and serialization), administered the Boost wiki, and served as a mentor for Google Summer of Code. Mr. Garland holds a Master’s degree in Computer Science from Arizona State University and a Bachelor of Science in Systems Engineering from the University of Arizona. He is co-author of Large Scale Software Architecture: A Practical Guide Using UML. He is currently Principal Consultant for his own company: CrystalClear Software, Inc and assistant chair of the Library Working Group for the C++ standards committee.
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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
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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com
YouTube Channel Managed by Digital Medium Ltd: https://events.digital-medium.co.uk
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