28 lines · cpp
1// RUN: %clang_cc1 -std=c++2a -verify %s2 3struct 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 12enum Bool : bool {};13struct 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 20template<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};26template struct Ugly<bool>;27template struct Ugly<int>; // expected-note {{in instantiation of}}28