In the pre-Kona WG21 mailing is P3858R0 “A Lifetime-Management Primitive for Trivially Relocatable Types” (std::restart_lifetime) (Sankel, Bauman, Halpern). A correspondent asks for my thoughts on it.| Arthur O’Dwyer
The pre-Kona WG21 mailing includes [N5028 "SoV and Collated Comments,"](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/n5028.pdf) which is the collation of all 26 National Bodies' comments on the C++26 [CD](/blog/2019/08/02/the-tough-guide-to-cpp-acronyms/#wg21-cd-dis-is-nb-wd). Nineteen NBs submitted comments. It is important to note that different NBs have different mechanisms for soliciting their comments. The US NB simply submits every comment it receives — no filter. My impre...| Arthur O’Dwyer
Here’s a simple and trivially relocatable MoveOnlyCallable type. This is like std::move_only_function<int(int) const>, except that the “take int and return int” part is hard-coded, for simplicity. (Godbolt.)| Arthur O’Dwyer