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// RUN: %clang_cc1 -std=c++2a -verify %s
struct Good {
bool operator==(const Good&) const = default;
bool operator!=(const Good&) const = default;
friend bool operator==(const Good&, const Good&) = default;
friend bool operator!=(const Good&, const Good&) = default;
};
enum Bool : bool {};
struct Bad {
bool &operator==(const Bad&) const = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'bool &'}}
const bool operator!=(const Bad&) const = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'const bool'}}
friend Bool operator==(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'Bool'}}
friend int operator!=(const Bad&, const Bad&) = default; // expected-error {{return type for defaulted equality comparison operator must be 'bool', not 'int'}}
};
template<typename T> struct Ugly {
T operator==(const Ugly&) const = default; // expected-error {{return type}}
T operator!=(const Ugly&) const = default; // expected-error {{return type}}
friend T operator==(const Ugly&, const Ugly&) = default; // expected-error {{return type}}
friend T operator!=(const Ugly&, const Ugly&) = default; // expected-error {{return type}}
};
template struct Ugly<bool>;
template struct Ugly<int>; // expected-note {{in instantiation of}}
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