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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/94162] ICE [neg] bad return type in defaulted <=>
Date: Mon, 08 Mar 2021 16:32:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94162

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Test from PR99429:
namespace std {
struct strong_ordering {
  int _v;
  constexpr strong_ordering (int v) :_v(v) {}
  constexpr operator int (void) const { return _v; }
  static const strong_ordering less;
  static const strong_ordering equal;
  static const strong_ordering greater;
};
constexpr strong_ordering strong_ordering::less =3D -1;
constexpr strong_ordering strong_ordering::equal =3D 0;
constexpr strong_ordering strong_ordering::greater =3D 1;
}

template <unsigned long N>
struct duration {
  static constexpr const long period =3D N;
  constexpr duration (void) =3D default;
  constexpr duration (const duration& d) =3D default;
  constexpr bool operator=3D=3D (const duration& d) const =3D default;
  constexpr bool operator<=3D> (const duration& d) const =3D default;
  long _d;
};

using nanoseconds =3D duration<1>;
using microseconds =3D duration<nanoseconds::period * 1000>;=