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Trip report: June 2025 ISO C++ standards meeting (Sofia, Bulgaria) – Sutter’s Mill

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Today marks a turning point in C++: A few minutes ago, the C++ committee voted the first seven (7) papers for compile-time reflection into draft C++26 to several sustained rounds of applause in the room. I think Hana “Ms. Constexpr” Dusíková summarized the impact of this feature best a few days ago, in her calm deadpan way… when she was told that the reflection paper was going to make it to the Saturday adoption poll, she gave a little shrug and just quietly said: “Whole new language.” Mic drop. Until today, perhaps the most momentous single feature poll of C++’s history was the poll in Toronto in July 2007 to adopt Bjarne Stroustrup’s and Gabriel Dos Reis’ first “constexpr” paper into draft C++11. Looking back now, we can see what a tectonic shift that started for C++. I’m positive that for many years to come we’ll be looking back at today, the day reflection first was adopted for standard C++, as a pivotal date in the language’s history. Reflection will fundamentally improve the way

Herb Sutter C++ 2025-06-21 2025-06-22 6 Minutes A unique milestone: “Whole new language” Today marks a turning point in C++: A few minutes ago, the C++ committee voted the first seven (7) papers for compile-time reflection into draft C++26 to several sustained rounds of applause in the room. I think Hana “Ms. Constexpr” Dusíková summarized the impact of this feature best a few days ago, in her calm deadpan way… when she was told that the reflection paper was going to make it to the Saturday adoption poll, she gave a little shrug and just quietly said: “Whole

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