83 lines · cpp
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 %s4// RUN: %clang_cc1 -triple x86_64-apple-darwin -fcxx-exceptions -fsyntax-only -pedantic -verify -Wsign-compare -std=c++2a -DTEST_TRIVIAL=1 %s5 6#ifndef TEST_TRIVIAL7void 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 12struct 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 17struct comparable {18 int operator<=>(comparable);19};20struct 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};24bool b = default_compare_not_found() < default_compare_not_found(); // expected-note {{first required here}}25 26namespace std {27inline namespace __1 {28struct partial_ordering; // expected-note {{forward declaration}}29}30} // namespace std31 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 37namespace std {38inline namespace __1 {39struct partial_ordering {40 unsigned value;41};42} // namespace __143} // namespace std44 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 50namespace std {51inline namespace __1 {52struct strong_ordering {53 long long value;54 static const strong_ordering equal; // expected-note {{declared here}}55};56} // namespace __157} // namespace std58 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#else65 66namespace std {67inline namespace __1 {68struct strong_ordering {69 char value = 0;70 constexpr strong_ordering() = default;71 // non-trivial72 constexpr strong_ordering(strong_ordering const &other) : value(other.value) {}73};74} // namespace __175} // namespace std76 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#endif83