1Michael Wong Distinguished Engineer ● Chair of SYCL Heterogeneous Programming Language ● ISO C++ Directions Group past Chair ● Past CEO OpenMP ● ISOCPP.org Director, VP http://isocpp.org/wiki/ 2.1 Simplify porting of standard C++ applications to SYCL Closer alignment and integration with ISO C++ Multiple Backend acceleration and API independent SYCL 2020 increases expressiveness and simplicity Lite-Runtime https://software.intel.com/content/www/us/en/develop/articles/interoperability-dpcpp-sycl-opencl.html https://www.renesas.com/br/en/about/press-room/renesas-electronics-and-codeplay-coll

we use async exceptions on all modules docs.microsoft.com/en-us/cpp/cpp/structured-exception-handling-c-cpp?view=msvc-160 docs.microsoft.com/en-us/windows/win32/debug/structured-exception-handling2021 processor specific BYTE ExtendedRegisters[MAXIMUM_SUPPORTED_EXTENSION]; }; docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-context Contains processor-specific register data. The system SegSs; BYTE ExtendedRegisters[MAXIMUM_SUPPORTED_EXTENSION]; ... }; docs.microsoft.com/en-us/windows/win32/api/winnt/ns-winnt-context Contains processor-specific register data. The system

of mistakes caused by confusing units or quantities • Code handling the physical computation is o�en written by domain experts such as physicists that are not necessarily fluent in C++ CppCon 2024: Improving our safety with a quantities and units library The proliferation of conversion macros 13• O�en more than once in the repository #define RAD_TO_DEG (180 / PI) #define RAD_TO_DEG 57.2957795131 #define Approach to Physical Units CppCon 2024: Improving our safety with a quantities and units library ISO C++ papers 21• P1935: A C++ Approach to Physical Units • P2980: A motivation, scope, and plan for

Conceived and served as Project Editor for Int’l Standard on Mathema:cal Special Func:ons in C++ (ISO/IEC 29124), now incorporated into C++17’s . • Be forewarned: Based on my training and experience � Any type aliases (typedef/using) or namespace names. • Never defined, only declared: � Names of en``es (e.g., std::declval) intended for use in only unevaluated contexts. • Predefined: � Certain digits.” (The grammar clarifies that leYers includes underscore plus most characters from ISO/IEC 10646). � “An en:ty is a value, object, reference, structured binding, func`on, enumerator, type, class

participant in C++ standardization 3 Copyright © 2022-2024 by Walter E. Brown. All rights reserved. • Wri0en ̴175 papers for WG21, proposing such now-standard C++ library features as gcd/lcm, cbegin/cend Conceived and served as Project Editor for the Int’l Standard on Mathema:cal Special Func:ons in C++ (ISO/IEC 29124), incorporated into since C++17. • Be forewarned: Based on my training and experience detec%on idiom code [2014]. • In due course, that idiom was proposed, adopted, and published in the ISO Library Fundamentals TS [Technical Specifica,on]: � E.g., GCC and clang each provide std::experimental::nonesuch

just months away! 2025-06 –> c++26 dra� ships June to Feb 2026– national body/iso review and bug fixing late 2026 –> final iso approval 2.1Priorities for c++26 bug fixes - always a high priority concurrency Wright http://crystalclearso�ware.com/2024cppcon/cpp26preview.pdf https://en.cppreference.com/w/cpp/compiler_support https://en.cppreference.com/w/cpp/utility/program/atexit 90

35 40 “Which development environments (IDEs) or editors do you use for C++ development?” 2023 ISO C++ Developer Survey “Lite” *data shown is for “primary” IDEs/editors 37% 25% 11% 8% Visual Studio install Microsoft.VisualStudio.2022.Community --silent --override "--wait --quiet --add ProductLang en-us --add Microsoft.VisualStudio.Workload.NativeDesktop --includeRecommended" https://aka.ms/getvisualstudioPopular cppreference list of libraries: https://en.cppreference.com/w/cpp/links/libs conan search https://conan.io/center vcpkg search https://vcpkg.io/en/packagesCode reuse with libraries

2MOTIVATION Q14 Is throwing exceptions to report errors allowed throughout your current project? ISO Survey 2020 45.1% 37.1% 17.8% Q2 What is your company’s main domain? (answers may overlap) C++ Koenig Bjarne Stroustrup 1989 PART I: HISTORY 17PART I: HISTORY Original design Standard / formal ISO Existing practice Exceptions are used primarily for error handling. Control flow management is authors: http://refspecs.linux-foundation.org/abi-eh-1.21.html • MSVC’s SEH: https://docs.microsoft.com/en-us/cpp/cpp/structured-exception-handling-c-cpp?view=vs-2019 CppCon2018: James McNellis“Unwinding the

Compatibilities with C CHAPTER 01: TOWARDS MODERN C++ Figure 1: Figure 1.2: Compatabilities between ISO C and ISO C++ 1.2 Compatibilities with C For some force majeure and historical reasons, we had to use Edition) Bjarne Stroustrup History of C++ • C++ compiler support • Incompatibilities Between ISO C and ISO C++ Chapter 02: Language Usability Enhancements When we declare, define a variable or constant not occur after the release operation, which is a backward barrier, and std::memory_order_acquire en- sures that a subsequent read or write after a acquire does not occur before the acquire operation

Table (IAT) List of import addresses as resolved by the loader … … … https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section 10 * Actually in section .rdata… .idata lib1: platform to make a conforming C++ implementation on top of that stuff. “ Arthur O’Dwyer, on the iso mailing list https://lists.isocpp.org/std-proposals/2023/07/7239.php 49Takeaways 50Shared Libs offset Hint/Name Table • Hint idx to export table • Function name https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section 56dll1.dll void f() { ... } exe dll1: __imp_f