28 lines · cpp
1// RUN: %clang_cc1 -std=c++2a -verify %s2 3struct Good1 {4 bool operator==(const Good1&) const = default;5 bool operator!=(const Good1&) const = default;6};7struct Good2 {8 friend bool operator==(const Good2&, const Good2&) = default;9 friend bool operator!=(const Good2&, const Good2&) = default;10};11 12enum Bool : bool {};13struct Bad {14 bool &operator==(const Bad&) const = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'bool &'}}15 const bool operator!=(const Bad&) const = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'const bool'}}16 friend Bool operator==(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'Bool'}}17 friend int operator!=(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted equality 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