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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/88173] `std::numeric_limits<T>::quiet_NaN()` is not always
 constexpr
Date: Tue, 08 Dec 2020 18:52:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88173

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-12-08
                 CC|                            |jason at gcc dot gnu.org

--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
Shorter:

#define inf __builtin_huge_val()
#define nan __builtin_nan("")

constexpr bool b1 =3D inf > nan; // OK
constexpr bool b2 =3D nan < inf; // =E2=80=98(+QNaN <=3D 1.7976931348623157=
e+308)=E2=80=99 is not a
constant expression=