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BenBEOkay, let's see how long it takes for this feature to get implemented in clang …<a href="https://github.com/llvm/llvm-project/issues/135764" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://github.com/llvm/llvm-project/issues/135764</a><a href="https://social.chaotikum.org/tags/clang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#clang</a> <a href="https://social.chaotikum.org/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://social.chaotikum.org/tags/constexpr" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#constexpr</a>

BenBEIs there a way to get Clang to output the exact number of constexpr evaluation steps it took while evaluating an initializer? AFAICS -ftime-trace only reports the time it took, not the evaluation steps counted against the evaluation step limit.Use-case: I have some constexpr-heavy C++ code I want to optimize to work with fewer constexpr evals when compiling, so you can do more of the operations of that lib at compile time …<a href="https://social.chaotikum.org/tags/clang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#clang</a> <a href="https://social.chaotikum.org/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a>

Andreas FertigYou can benefit from my knowledge of modern and clean code, too.Order your copy here:Print: <a href="https://amzn.to/4hZLrc1" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://amzn.to/4hZLrc1</a> E-book: <a href="https://fertig.to/bpwcpp20" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://fertig.to/bpwcpp20</a><a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#programming</a> <a href="https://mas.to/tags/book" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#book</a> <a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a>

BenBEGot some problem with C++: GCC compiles fine, Clang throws an error.Minimal reproducer:template <typename T> class A { public: typedef A<T> self_type; private: T v; public: constexpr A() : v() {} constexpr A(T _v): v(_v) {} public: static constexpr self_type def = self_type(T(42)); };int main() { volatile auto foo = A<int>::def; (void)foo; return 0; }How to get this to work with Clang? I want to keep def as a class constant.<a href="https://social.chaotikum.org/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://social.chaotikum.org/tags/gcc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#gcc</a> <a href="https://social.chaotikum.org/tags/clang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#clang</a>

C++NowC++Now 2025 SESSION ANNOUNCEMENT: A Practitioner's Guide to Writing std-Compatible Views by Zach Laine<a href="https://schedule.cppnow.org/session/2025/a-practitioners-guide-to-writing-std-compatible-views/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://schedule.cppnow.org/session/2025/a-practitioners-guide-to-writing-std-compatible-views/</a>Register now at <a href="https://cppnow.org/registration/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cppnow.org/registration/</a><a href="https://mastodon.social/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mastodon.social/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mastodon.social/tags/Cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Cpp20</a> <a href="https://mastodon.social/tags/ranges" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ranges</a>

Andreas FertigDon't miss out, I'm hosting a free of charge 1-Hour C++ training class<a href="https://andreasfertig.com/blog/2025/04/free-1-hour-cpp-training-class/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://andreasfertig.com/blog/2025/04/free-1-hour-cpp-training-class/</a><a href="https://mas.to/tags/cpp17" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp17</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/course" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#course</a>

Andreas FertigThe German @iXmagazin issue 2025/04 contains one of my articles "C++20-Coroutinen, Teil 4: Stream-Parser"<a href="https://andreasfertig.com/blog/2025/04/ix-article-cpp20-coroutinen-teil-4-stream-parser/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://andreasfertig.com/blog/2025/04/ix-article-cpp20-coroutinen-teil-4-stream-parser/</a><a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/ct" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ct</a> <a href="https://mas.to/tags/heise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heise</a> <a href="https://mas.to/tags/article" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#article</a>

C++NowC++Now 2025 SESSION ANNOUNCEMENT: Advanced Ranges - Writing Modular, Clean, and Efficient Code with Custom Views by Steve Sorkin<a href="https://schedule.cppnow.org/session/2025/advanced-ranges/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://schedule.cppnow.org/session/2025/advanced-ranges/</a>Register now at <a href="https://cppnow.org/registration/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cppnow.org/registration/</a><a href="https://mastodon.social/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mastodon.social/tags/Cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Cpp20</a> <a href="https://mastodon.social/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#programming</a> <a href="https://mastodon.social/tags/ranges" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ranges</a>

Andreas FertigFor C++ developers who want to write modern codeThe book "Programming with C++20 "will help you to apply the new features of C++20.Order your copy here:Print: <a href="https://amzn.to/4hZLrc1" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://amzn.to/4hZLrc1</a> E-book: <a href="https://fertig.to/bpwcpp20" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://fertig.to/bpwcpp20</a><a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#programming</a> <a href="https://mas.to/tags/book" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#book</a> <a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a>

C++NowC++Now 2025 SESSION ANNOUNCEMENT: Distributed Programming With C++ Coroutines and Asynchronous Communication Frameworks by Johan Vanslembrouck<a href="https://schedule.cppnow.org/session/2025/distributed-programming-with-cpp-coroutines-and-asynchronous-communication-frameworks/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://schedule.cppnow.org/session/2025/distributed-programming-with-cpp-coroutines-and-asynchronous-communication-frameworks/</a>Register now at <a href="https://cppnow.org/registration/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cppnow.org/registration/</a><a href="https://mastodon.social/tags/coroutines" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#coroutines</a> <a href="https://mastodon.social/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mastodon.social/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mastodon.social/tags/Cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Cpp20</a>

Andreas FertigDo you care about performance and like to know how lambdas score compared to function objects? Check out my post, "Under the covers of C++ lambdas - Part 3: Generic lambdas"<a href="https://andreasfertig.com/blog/2020/12/under-the-covers-of-cpp-lambdas-part-3-generic-lambdas/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://andreasfertig.com/blog/2020/12/under-the-covers-of-cpp-lambdas-part-3-generic-lambdas/</a><a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a>

Andreas FertigIn my latest blog post, "The correct way to do type punning in C++," you'll learn about the proper way to do type punning in modern C++.<a href="https://andreasfertig.com/blog/2025/03/the-correct-way-to-do-type-punning-in-cpp/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://andreasfertig.com/blog/2025/03/the-correct-way-to-do-type-punning-in-cpp/</a><a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a>

h-1^[solo]I consciously use up to C++17 features in my code. I completed C++20 book recently and I find evolution of the language already delivered, quite useful, which is contrary to my own fears from the past that helped me ignore any further development after C++17. Practical usage is still ahead of me but aside of book, examples like this are extremely helpful to continue understanding their practicality: <a href="https://oleksandrkvl.github.io/2021/04/02/cpp-20-overview.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://oleksandrkvl.github.io/2021/04/02/cpp-20-overview.html</a> <a href="https://graphics.social/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://graphics.social/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a>

Andreas FertigThe German @iXmagazin issue 2025/03 contains one of my articles "C++20s Coroutinen - Ein Scheduler mit C++-Coroutinen "<a href="https://andreasfertig.com/blog/2025/02/ix-article-cpp20s-coroutinen-ein-scheduler-mit-cpp-coroutinen/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://andreasfertig.com/blog/2025/02/ix-article-cpp20s-coroutinen-ein-scheduler-mit-cpp-coroutinen/</a><a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/ct" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ct</a> <a href="https://mas.to/tags/heise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heise</a> <a href="https://mas.to/tags/article" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#article</a>

Andreas FertigIn my latest blog post, "C++ for embedded systems: constexpr and consteval," you'll learn what C++ does for embedded software development.<a href="https://bit.ly/411jSbK" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://bit.ly/411jSbK</a><a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp23" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp23</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a>

Andreas FertigThe German @iXmagazin issue 2025/02 contains one of my articles "C++-Coroutinen einsetzen: Tasks und Generatoren"<a href="https://bit.ly/40Yw6C5" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://bit.ly/40Yw6C5</a><a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/ct" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ct</a> <a href="https://mas.to/tags/heise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heise</a> <a href="https://mas.to/tags/article" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#article</a>

Andreas FertigI'm thrilled to let you know that I'll give the workshop Safe and Efficient C++ for Embedded Environments (compact) at C++Online<a href="https://bit.ly/4h8FIjc" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://bit.ly/4h8FIjc</a><a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a> <a href="https://mas.to/tags/cpp17" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp17</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a>

Andreas FertigThe German @iXmagazin issue 2025/01 contains one of my articles "C++20-Coroutinen effizient verwenden"<a href="https://bit.ly/4hsTLQg" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://bit.ly/4hsTLQg</a><a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/ct" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ct</a> <a href="https://mas.to/tags/heise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heise</a> <a href="https://mas.to/tags/article" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#article</a>

Andreas FertigThe recording of my talk "Fast and small C++ - When efficiency matters" at <a href="https://mas.to/@code" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@code</a>::dive is available!<a href="https://bit.ly/4ar9Wvf" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://bit.ly/4ar9Wvf</a><a href="https://mas.to/tags/cpp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp</a> <a href="https://mas.to/tags/cpp20" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cpp20</a> <a href="https://mas.to/tags/cplusplus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cplusplus</a>

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