1 // Test diagnostics for ill-formed STL <compare> headers. 2 3 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fcxx-exceptions -fsyntax-only -pedantic -verify -Wsign-compare -std=c++2a %s 4 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fcxx-exceptions -fsyntax-only -pedantic -verify -Wsign-compare -std=c++2a -DTEST_TRIVIAL=1 %s 5 6 #ifndef TEST_TRIVIAL compare_not_found_test()7void compare_not_found_test() { 8 // expected-error@+1 {{cannot use builtin operator '<=>' because type 'std::partial_ordering' was not found; include <compare>}} 9 (void)(0.0 <=> 42.123); 10 } 11 12 struct deduction_compare_not_found { 13 // expected-error@+1 {{cannot default 'operator<=>' because type 'std::strong_ordering' was not found; include <compare>}} 14 friend auto operator<=>(const deduction_compare_not_found&, const deduction_compare_not_found&) = default; 15 }; 16 17 struct comparable { 18 int operator<=>(comparable); 19 }; 20 struct default_compare_not_found { 21 // expected-error@+1 {{cannot default 'operator<=>' because type 'std::strong_ordering' was not found; include <compare>}} 22 friend int operator<=>(const default_compare_not_found&, const default_compare_not_found&) = default; 23 }; 24 bool b = default_compare_not_found() < default_compare_not_found(); // expected-note {{first required here}} 25 26 namespace std { 27 inline namespace __1 { 28 struct partial_ordering; // expected-note {{forward declaration}} 29 } 30 } // namespace std 31 compare_incomplete_test()32auto compare_incomplete_test() { 33 // expected-error@+1 {{incomplete type 'std::partial_ordering' where a complete type is required}} 34 return (-1.2 <=> 123.0); 35 } 36 37 namespace std { 38 inline namespace __1 { 39 struct partial_ordering { 40 unsigned value; 41 }; 42 } // namespace __1 43 } // namespace std 44 missing_member_test()45auto missing_member_test() { 46 // expected-error@+1 {{standard library implementation of 'std::partial_ordering' is not supported; member 'equivalent' is missing}} 47 return (1.0 <=> 1.0); 48 } 49 50 namespace std { 51 inline namespace __1 { 52 struct strong_ordering { 53 long long value; 54 static const strong_ordering equal; // expected-note {{declared here}} 55 }; 56 } // namespace __1 57 } // namespace std 58 test_non_constexpr_var()59auto test_non_constexpr_var() { 60 // expected-error@+1 {{standard library implementation of 'std::strong_ordering' is not supported; member 'equal' does not have expected form}} 61 return (1 <=> 0); 62 } 63 64 #else 65 66 namespace std { 67 inline namespace __1 { 68 struct strong_ordering { 69 char value = 0; 70 constexpr strong_ordering() = default; 71 // non-trivial strong_orderingstd::__1::strong_ordering72 constexpr strong_ordering(strong_ordering const &other) : value(other.value) {} 73 }; 74 } // namespace __1 75 } // namespace std 76 test_non_trivial(int LHS,int RHS)77auto test_non_trivial(int LHS, int RHS) { 78 // expected-error@+1 {{standard library implementation of 'std::strong_ordering' is not supported; the type is not trivially copyable}} 79 return LHS <=> RHS; 80 } 81 82 #endif 83