clang/test/Sema/attr-c2x.c

   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}}
  26 void 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}}