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C++ Coroutines, from Scratch - Phil Nash - CppCon 2022
github.com/CppCon/CppCon2022
C++ 20 introduced coroutines into the language. Coroutines have the potential to greatly simplify some types of code - particularly, but not limited to, anything asynchronous in nature. But early adoption has been hindered by both the lack of library support in the standard and the inherent complexity of the feature itself (which, due to that lack of library support, you are typically more exposed to).
Now we have a bit of a “Blind men and an elephant” problem - where we’re getting disjointed glimpses of what coroutines, supposedly, are - without the big picture. I can’t claim to be able to give you a comprehensively big enough picture in a 60 or 120 minute talk, but my aim is to plot a journey through it by starting with a motivating example (a typical multiple async task problem), looking at how we might approach this without coroutines, then seeing what coroutines can do for us - and finally looking at what that would look like with library support.
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Phil Nash
Phil Nash is the original author of the C++ test framework, Catch2, and composable command line parser, Clara. As Developer Advocate at SonarSource he’s involved with SonarQube, SonarLint and SonarCloud, particularly in the context of C++. He’s also a member of the ISO C++ standards committee, organiser of C++ London and C++ on Sea, as well as co-host and producer of the Cpp.chat and No Diagnostic Required podcasts.
More generally Phil’s an advocate for good testing practices, TDD and using the type system and functional techniques to reduce complexity and increase correctness. He’s previously worked in Finance and Mobile and offers training and coaching in TDD for C++.
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