fornwall opened a new pull request, #4506:
URL: https://github.com/apache/arrow-adbc/pull/4506
Raise the C++ language standard for the whole ADBC C++ project (the `c/`
directory) from C++17 to C++20.
- Compiler support matrix:
- [Compiler support for
C++17](https://en.cppreference.com/cpp/compiler_support/17)
- [Compiler support for
C++20](https://en.cppreference.com/cpp/compiler_support/20)
- A post from LLVM in November 2025:
- [RFC: Raise the minimum compiler requirements to move toward
C++20](https://discourse.llvm.org/t/rfc-raise-the-minimum-compiler-requirements-to-move-toward-c-20/88894)
- Bumps in notable open source projects:
- **Qt** — project agreed to raise its minimum required standard to C++20,
dev mailing list **May 2023**:
https://lists.qt-project.org/pipermail/development/2023-May/043893.html
- **Chromium** — C++20 allowed in first-party code, **November 2023**:
https://groups.google.com/a/chromium.org/g/chromium-dev/c/qjveLqape0I
- **Node.js 22** (V8 12.4) — build switched to requiring C++20, **April
2024**: https://nodejs.org/en/blog/release/v22.0.0
- What C++20 unlocks (concepts, ranges, coroutines, modules, designated
initializers, `consteval`/`constinit`, the `<=>` spaceship operator,
`std::span`, `std::format`, calendar/timezone `<chrono>`, etc):
- https://en.cppreference.com/w/cpp/20
-
https://github.com/AnthonyCalandra/modern-cpp-features/blob/master/CPP20.md
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