36   struct B {  struct
37     bool operator==(const B&) const;
40     B b;
87   struct B {  struct
89     std::strong_ordering operator<=>(const B&) const = default;
91   DEF(B() <=> B());
92   static_assert(!noexcept(B() <=> B()));
139   struct B {  struct
141     friend std::strong_ordering operator<=>(B, B) = default;
143   std::strong_ordering operator<=>(B, B) noexcept;
183   struct B {  struct
184     friend bool operator==(B, B) noexcept;
185     friend bool operator!=(B, B) = default;
187     friend int operator<=>(B, B) noexcept;
188     friend bool operator<(B, B) = default;
189     friend bool operator<=(B, B) = default;
190     friend bool operator>(B, B) = default;
191     friend bool operator>=(B, B) = default;
193   bool operator!=(B, B) noexcept;
194   bool operator<(B, B) noexcept;
195   bool operator<=(B, B) noexcept;
196   bool operator>(B, B) noexcept;
197   bool operator>=(B, B) noexcept;
216   template<int> struct B {  struct
217     B();
218     B(const B&) = delete; // expected-note 3{{here}}
219     friend bool operator==(B, B); // expected-note 3{{passing}}
220     bool operator!=(const B&) const = default; // expected-error 3{{call to deleted constructor}}
223   bool b0 = B<0>() != B<0>(); // expected-note {{in defaulted equality comparison operator}}
224 …bool b1 = B<1>().operator!=(B<1>()); // expected-note {{in defaulted equality comparison operator}}
225   int b2 = sizeof(&B<2>::operator!=); // expected-note {{in evaluation of exception specification}}