[Bug c++/95242] [10/11 Regression] spurious "warning: zero as null pointer constant [-Wzero-as-null-pointer-constant]" on comparisons with -std=c++2a

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95242

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Another way to implement the __unspec constructor would be:

  consteval __unspec(int __n) { if (__n != 0) throw __n; }

But I think I discussed this with Richard Smith in Prague and we realised there
was a problem with it, but I might be misremembering.