Bump C++ standard to C++20
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@rascani is already working on this.
Since Jun 23, 2026.
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Description
🚀 The feature, motivation and pitch
PyTorch has started rolling out C++20 (https://github.com/pytorch/pytorch/issues/176662), while ExecuTorch has remained on C++17. This has started to cause reverts to pytorch for C++ code that is shared with ExecuTorch (https://github.com/pytorch/pytorch/pull/179286).
We would like to consider bumping ExecuTorch's C++ standard to C++20, but first we would like to solicit feedback from users and partners on whether their toolchains support C++20.
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