26 struct EvilBool {  struct
29   EvilBool(EvilBool const&) = default;  argument
30   EvilBool(EvilBool&&) = default;
32   friend EvilBool operator!(EvilBool const& other) {  in operator !()
34     return EvilBool{!other.value};  in operator !()
38   friend struct MoveOnlyCallable<EvilBool>;
39   friend struct CopyCallable<EvilBool>;
40   friend struct NoExceptCallable<EvilBool>;
42   constexpr explicit EvilBool(bool x) : value(x) {}  in EvilBool()  argument
43   EvilBool& operator=(EvilBool const& other) = default;
49 int EvilBool::bang_called = 0;  argument
181         using T = CopyCallable<EvilBool>;  in return_type_tests()
183         static_assert(is_same<decltype(ret()), EvilBool>::value, "");  in return_type_tests()
184         EvilBool::bang_called = 0;  in return_type_tests()
186         assert(EvilBool::bang_called == 1);  in return_type_tests()
189         assert(EvilBool::bang_called == 2);  in return_type_tests()
416         using T = NoExceptCallable<EvilBool>;  in call_operator_noexcept_test()