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 @StephanTLavavej 1 Version 1.0 - September Write 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 CppCon 2020 • Announced at CppCon 2019 • github.com/microsoft/STL • Apache License v2.0 with LLVM Exception • Implemented ~50 C++20 features • Majority from our amazing contributors • Extensively reviewed

Leveraging C++20/23 Features for Low Level InteractionsOverview In a baremetal environment, we’re going to demonstrate e�ective use of C++ How did we end up with C language HW interactions? What are best e�ectively in line with C++ best practices? �. See also Stroustrup (2023), in referencesKey C++ Safety Features There’s lots, but…. Lifetime Management Smart pointers handle new/delete for you. We’ll mostly “Delivering Safe C++”, cppcon2023 https://www.youtube.com/watch? v=I8UvQKvOSSw Fertig, Andreas (2020) “C++20: Aggregate, POD, trivial type, standard layout class, what is what.” https://andreasfertig.blog/2

required* features • Requires preview release of Windows SDK • *C11 optional features not yet supported Visit https://aka.ms/cpp/c17 for more detailsAt CppCon last yearAnnouncing today C++20 Modules are experimental module tooling Visit https://aka.ms/cpp/20modules for more detailsAnnouncing today C++20 Coroutines are feature complete • Available in Visual Studio 2019 version 16.8 • Under /std:c++latest <=> three-way comparison operator • 84 STL features including • C++ synchronization library 🕙 Coming next • C++20 constexpr • Rest of 24 C++20 STL features • std::ranges, std::format & Chrono • Specialized

1.4 Online Event October 12, 2020 @sveta_isakova Kotlin 1.4 Language Features Svetlana Isakova Kotlin 1.4 Language Features • SAM conversions for Kotlin classes • Explicit API mode • Trailing

Back to Basics: Classic STL Bob Steagall CppCon 2021CppCon 2021 – Back to Basics: Classic STL Copyright © 2021 Bob Steagall Overview • Rationale • History and design overview • Iterators • Containers • Algorithms 2CppCon 2021 – Back to Basics: Classic STL Copyright © 2021 Bob Steagall Goals and References • Goals • Understand overall STL design • Understand iterators • Recommended references The Standard C++ Library, Second Edition Nicolai M. Josuttis – Addison-Wesley 2012 • Effective STL Scott Meyers – O'Reilly 2001 • Programming: Principles and Practice Using C++, Second Edition Bjarne

EXPLORATION OF C++20 METAPROGRAMMING INBAL LEVIWHO AM I? • AC++ enthusiast. • An embedded software engineer at Solar Edge working on smart home. • One of the organizers of CoreCpp conference and user code. 3MOTIVATION • Some environments discourage extensive use of templates 4 • We’ll see how C++20 creates a paradigm shift in the way we use metaprogramming. And I don’t blame them…• Part 0: (Prologue) II: Overload resolution and ADL • Part III: Conditions at compile time pre C++20 • Part IV: Conditions at compile time using C++20 (and beyond…) • Part V: Advanced methods for controlling compile time logic

C++20 ❤ SQL John R Bandela, MDOverview u SQL u C++ Example u Implementation techniques u fixed_string u meta_struct u Parsing compile time strings into meta_structsOverview v SQL v C++ Example [&](auto &m) mutable { read_row_into(stmt, index, m.value); ++index; }, row); return row; }C++20 ❤ SQL https://github.com/google/cpp-from-the-sky-down/tree/master/meta_struct_20/cppcon_version

Agenda 1. Improving C++20 Atomic Min/Max(P0493; Michael) 2. Hazard pointer extensions (P3135; Maged) 3. Pointer tagging (P3125; Maged) 4. Parallel Range algorithms (P3179; Michael), may be Parallel Parallel Algorithms (P2500)C++26: Atomic Min/MaxC++26: Improving C++20 Concurrency primitives atomic min/max (P0493)Atomic min/max motivation (P0493) Long history - almost as old as atomic addition Multithreaded (P3008) Atomic min/max operations are crucial for concurrent algorithms Integer versions added in C++20 Floating-point versions were removed due to concerns The Challenge of Floating-Point Corner Cases

CPPCON 2020 / CPPCON 2020 / MACRO-FREE TESTING MACRO-FREE TESTING WITH C++20 WITH C++20 | | | | HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 KRIS@JUSIAK 14UT - UT - HTTPS://GITHUB.COM/BOOST-EXT/UT HTTPS://GITHUB.COM/BOOST-EXT/UT 2 / 14UT - UT - C++20 ( C++20 ( , , ) (*) LIMITATIONS MAY APPLY (*) LIMITATIONS MAY APPLY HTTPS://GITHUB.COM/BOOST-EXT/UT CLANG-11.0.0+ GCC-9+, CLANG-9.0+, APPLE CLANG-11.0.0+ MSVC-2019+* MSVC-2019+* 2 / 14UT - UT - C++20 ( C++20 ( , , ) SINGLE SINGLE (2K LOC) WITH NO EXTERNAL DEPENDENCIES (2K LOC) WITH NO EXTERNAL DEPENDENCIES

C++26 for C++14 Developers: STL-Preview Author Tony Lee Reply-To cosgenio@gmail.com 1. Introduction Since the introduction of modern C++ in 2011, the language has seen seen numerous enhancements, particularly in compiler support and the STL. By 2024, C++23 has introduced many useful standard libraries like ranges, format, expected, and span. Despite these advancements on C++14 or C++17, with minimal adoption of C++20 or later１. This paper introduces stl-preview２, a library that backports most of the latest STL features (including those from C++26) to C++14 (but not