1 // RUN: %clang_cc1 -std=gnu++17 -fsyntax-only -fms-compatibility -verify %s 2 f()3void f() { 4 // GNU-style attributes are prohibited in this position. 5 auto P = new int * __attribute__((vector_size(8))); // expected-error {{an attribute list cannot appear here}} \ 6 // expected-error {{invalid vector element type 'int *'}} 7 8 // Ensure that MS type attribute keywords are still supported in this 9 // position. 10 auto P2 = new int * __sptr; // Ok 11 } 12 13 void g(int a[static [[]] 5]); // expected-error {{static array size is a C99 feature, not permitted in C++}} 14 15 namespace { 16 class B { 17 public: test()18 virtual void test() {} test2()19 virtual void test2() {} test3()20 virtual void test3() {} 21 }; 22 23 class D : public B { 24 public: test()25 void test() __attribute__((deprecated)) final {} // expected-warning {{GCC does not allow an attribute in this position on a function declaration}} test2()26 void test2() [[]] override {} // Ok test3()27 void test3() __attribute__((cf_unknown_transfer)) override {} // Ok, not known to GCC. 28 }; 29 } 30 31 template<typename T> 32 union Tu { T b; } __attribute__((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}} 33 34 template<typename T> 35 union Tu2 { int x; T b; } __attribute__((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}} 36 37 union Tu3 { int x; } __attribute((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}} 38 39 void tuTest1(Tu<int> u); // expected-note {{candidate function not viable: no known conversion from 'int' to 'Tu<int>' for 1st argument}} 40 void tuTest2(Tu3 u); // expected-note {{candidate function not viable: no known conversion from 'int' to 'Tu3' for 1st argument}} tu()41void tu() { 42 int x = 2; 43 tuTest1(x); // expected-error {{no matching function for call to 'tuTest1'}} 44 tuTest2(x); // expected-error {{no matching function for call to 'tuTest2'}} 45 } 46 f2()47[[gnu::__const__]] int f2() { return 12; } f3()48[[__gnu__::__const__]] int f3() { return 12; } f4()49[[using __gnu__ : __const__]] int f4() { return 12; } 50 51 static_assert(__has_cpp_attribute(gnu::__const__)); 52 static_assert(__has_cpp_attribute(__gnu__::__const__)); 53