#std::format#typeerasure#c++20
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Programming languagesSystems programmingC++Performance and optimizationCompilers and interpreters
Charlie Barto explains the internals of C++20's std::format, focusing on how type erasure optimizes code size and performance.
cppcon.org/ github.com/CppCon/CppCon2021 --- std::format is a very convenient and very fast text formatting interface added in C++20. This session looks at the internals of how std::format works, and why it works that way. We'll cover how and why argument types are erased (along with the basics of type erasure in general), how to customize format for your own types, precisely what happens when you do, and how format optimizes copying to its output without generating excessive amounts of code. No knowledge of std::format is required to understand this session. While the primary goal of this session is to understand some std::format internals, many of the techniques described may help you make your own generic libraries smaller and faster. --- Charlie Barto Charlie works on the Visual C++ Standard Library. He and open source contributors implemented ＜format＞ for msvc, based on {fmt}. --- Videos Filmed & Edited by Bash Films: BashFilms.com YouTube Channel Managed by Digital Medium Ltd events.digital-medium.co.uk *--*What people say. Recommended as a talk demonstrating how type erasure can improve performance and reduce code size in C++.
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