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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95242] [10/11 Regression] spurious "warning: zero as null
 pointer constant [-Wzero-as-null-pointer-constant]" on comparisons with
 -std=c++2a
Date: Tue, 26 May 2020 23:13:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95242

--- 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 !=3D 0) throw __n; }

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