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1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -Wno-strict-prototypes -fsyntax-only -verify -std=c2x %s2 3struct S {};4struct S * [[clang::address_space(1)]] Foo;5 6enum [[clang::enum_extensibility(open)]] EnumOpen {7 C0 = 1, C1 = 108};9 10enum [[clang::flag_enum]] EnumFlag {11 D0 = 1, D1 = 812};13 14[[clang::overloadable]] void foo(void *c);15[[clang::overloadable]] void foo(char *c);16 17void context_okay(void *context [[clang::swift_context]]) [[clang::swiftcall]];18void context_okay2(void *context [[clang::swift_context]], void *selfType, char **selfWitnessTable) [[clang::swiftcall]];19void context_async_okay(void *context [[clang::swift_async_context]]) [[clang::swiftasynccall]];20void 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}}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 'gnu::abi_tag' ignored}}43struct S s [[gnu::init_priority(1)]]; // expected-warning {{unknown attribute 'gnu::init_priority' ignored}}44