1 // RUN: %clang_cc1 -std=c11 -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -xc++ -std=c++11 -fsyntax-only -verify %s 3 4 _Static_assert("foo", "string is nonzero"); 5 #ifndef __cplusplus 6 // expected-error@-2 {{static_assert expression is not an integral constant expression}} 7 #endif 8 9 _Static_assert(1, "1 is nonzero"); 10 _Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} 11 12 void foo(void) { 13 _Static_assert(1, "1 is nonzero"); 14 _Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} 15 } 16 17 _Static_assert(1, invalid); // expected-error {{expected string literal for diagnostic message in static_assert}} 18 19 struct A { 20 int a; 21 _Static_assert(1, "1 is nonzero"); 22 _Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} 23 }; 24 25 #ifdef __cplusplus 26 #define ASSERT_IS_TYPE(T) __is_same(T, T) 27 #else 28 #define ASSERT_IS_TYPE(T) __builtin_types_compatible_p(T, T) 29 #endif 30 31 #define UNION(T1, T2) union { \ 32 __typeof__(T1) one; \ 33 __typeof__(T2) two; \ 34 _Static_assert(ASSERT_IS_TYPE(T1), "T1 is not a type"); \ 35 _Static_assert(ASSERT_IS_TYPE(T2), "T2 is not a type"); \ 36 _Static_assert(sizeof(T1) == sizeof(T2), "type size mismatch"); \ 37 } 38 39 typedef UNION(unsigned, struct A) U1; 40 UNION(char[2], short) u2 = { .one = { 'a', 'b' } }; 41 typedef UNION(char, short) U3; // expected-error {{static_assert failed "type size mismatch"}} 42 typedef UNION(float, 0.5f) U4; // expected-error {{expected a type}} 43
