[Bug c++/88173] `std::numeric_limits::quiet_NaN()` is not always constexpr

[jason at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88173

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 = inf > nan; // OK
constexpr bool b2 = nan < inf; // ‘(+QNaN <= 1.7976931348623157e+308)’ is not a
constant expression