
Implements [P2602R2 Poison Pills are Too Toxic](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2602r2.html) as a DR in C++20 mode.
Implements [P2602R2 Poison Pills are Too Toxic](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2602r2.html) as a DR in C++20 mode.