1 // RUN: %clang_cc1 -std=c++2a -verify %s
2 
3 struct Good {
4   int operator<=>(const Good&) const;
5 
6   bool operator<(const Good&) const = default;
7   bool operator>(const Good&) const = default;
8   friend bool operator<=(const Good&, const Good&) = default;
9   friend bool operator>=(const Good&, const Good&) = default;
10 };
11 
12 enum Bool : bool {};
13 struct Bad {
14   bool &operator<(const Bad&) const = default; // expected-error {{return type for defaulted relational comparison operator must be 'bool', not 'bool &'}}
15   const bool operator>(const Bad&) const = default; // expected-error {{return type for defaulted relational comparison operator must be 'bool', not 'const bool'}}
16   friend Bool operator<=(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted relational comparison operator must be 'bool', not 'Bool'}}
17   friend int operator>=(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted relational comparison operator must be 'bool', not 'int'}}
18 };
19 
20 template<typename T> struct Ugly {
21   T operator<(const Ugly&) const = default; // expected-error {{return type}}
22   T operator>(const Ugly&) const = default; // expected-error {{return type}}
23   friend T operator<=(const Ugly&, const Ugly&) = default; // expected-error {{return type}}
24   friend T operator>=(const Ugly&, const Ugly&) = default; // expected-error {{return type}}
25 };
26 template struct Ugly<bool>;
27 template struct Ugly<int>; // expected-note {{in instantiation of}}
28