gregoire@nuonsoft.com  Microsoft VC++ MVP Since 2007  Author of Professional C++, 2nd, 3rd, 4th, and 5th Edition  Co-author of C++ Standard Library Quick Reference& C++17 Standard Library Quick Reference  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection SupportC++23 Core Language6 Agenda  C++23 Core Language  Explicit Object std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support7 Explicit Object Parameters  Instead of implicit this, explicitly

Version 1.0 - September 15, 2020 1 C++20 STL Features: 1 Year of Development on GitHub Stephan T. Lavavej "Steh-fin Lah-wah-wade" Principal Software Engineer, Visual C++ Libraries stl@microsoft.com @StephanTLavavej2 down the slide numbers • Part 0: Overview • What's happened in the last year • Part 1: C++20 STL Features • Everything here is Standard, except as noted • Part 2: GitHub Development • For contributors • github.com/microsoft/STL • Apache License v2.0 with LLVM Exception • Implemented ~50 C++20 features • Majority from our amazing contributors • Extensively reviewed and tested • Released VS 2019

Metrology  Microsoft VC++ MVP Since 2007  Author of Professional C++, 2nd, 3rd and 4th Edition  5th Edition (C++20) coming later this year  Co-author of C++ Standard Library Quick Reference& C++17 Reference  Founder of the Belgian C++ Users Group (BeCPP)3 C++20 C++20 is big! Lots of new features! On Friday September 4, 2020, the C++20 standard passed ISO voting, expected to be formally std::vector are now constexpr  Needed to support constexpr reflection in the future “C++20 STL Features: One Year of Development on GitHub” -- Stephan T. Lavavej Tuesday, September 15 • 13:30Concurrency

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Metrology  Microsoft VC++ MVP Since 2007  Author of Professional C++, 2nd, 3rd, 4th, and 5th Edition  Co-author of C++ Standard Library Quick Reference& C++17 Standard Library Quick Reference 

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version 16.11, C++20 is now feature complete • All features under /std:c++20 switch are production ready including modules, coroutines, concepts • C++20 features awaiting DR resolution are available for now • C++23 • out_ptr and inout_ptr • contains for basic_string and basic_string_view • Other small features 🕙 Coming next for C++23 • STL • Standard library modules • Coroutines 💡 C++98* * with /permissive-