1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-strict-prototypes -fsyntax-only -verify -std=c2x %s 2 3 struct S {}; 4 struct S * [[clang::address_space(1)]] Foo; 5 6 enum [[clang::enum_extensibility(open)]] EnumOpen { 7 C0 = 1, C1 = 10 8 }; 9 10 enum [[clang::flag_enum]] EnumFlag { 11 D0 = 1, D1 = 8 12 }; 13 14 [[clang::overloadable]] void foo(void *c); 15 [[clang::overloadable]] void foo(char *c); 16 17 void context_okay(void *context [[clang::swift_context]]) [[clang::swiftcall]]; 18 void context_okay2(void *context [[clang::swift_context]], void *selfType, char **selfWitnessTable) [[clang::swiftcall]]; 19 void context_async_okay(void *context [[clang::swift_async_context]]) [[clang::swiftasynccall]]; 20 void context_async_okay2(void *context [[clang::swift_async_context]], void *selfType, char **selfWitnessTable) [[clang::swiftasynccall]]; 21 22 [[clang::ownership_returns(foo)]] void *f1(void); 23 [[clang::ownership_returns(foo)]] void *f2(); 24 25 [[clang::unavailable("not available - replaced")]] void foo2(void); // expected-note {{'foo2' has been explicitly marked unavailable here}} bar(void)26void bar(void) { 27 foo2(); // expected-error {{'foo2' is unavailable: not available - replaced}} 28 } 29 30 [[nodiscard]] int without_underscores(void); 31 [[__nodiscard__]] int underscores(void); 32 33 // Match GCC's behavior for C attributes as well. 34 [[gnu::constructor]] void ctor_func(void); 35 [[gnu::destructor]] void dtor_func(void); 36 [[gnu::hot]] void hot_func(void); 37 [[__gnu__::hot]] void hot_func2(void); 38 [[gnu::__hot__]] void hot_func3(void); 39 [[__gnu__::__hot__]] void hot_func4(void); 40 41 // Note how not all GCC attributes are supported in C. 42 [[gnu::abi_tag("")]] void abi_func(void); // expected-warning {{unknown attribute 'abi_tag' ignored}} 43 struct S s [[gnu::init_priority(1)]]; // expected-warning {{unknown attribute 'init_priority' ignored}} 44