1 // RUN: %clang_cc1 -std=c1x -fsyntax-only -verify %s 2 3 void g(void); 4 5 void foo(int n) { 6 (void) _Generic(0, 7 struct A: 0, // expected-error {{type 'struct A' in generic association incomplete}} 8 void(): 0, // expected-error {{type 'void ()' in generic association not an object type}} 9 int[n]: 0); // expected-error {{type 'int [n]' in generic association is a variably modified type}} 10 11 (void) _Generic(0, 12 void (*)(): 0, // expected-note {{compatible type 'void (*)()' specified here}} 13 void (*)(void): 0); // expected-error {{type 'void (*)(void)' in generic association compatible with previously specified type 'void (*)()'}} 14 15 (void) _Generic((void (*)()) 0, // expected-error {{controlling expression type 'void (*)()' compatible with 2 generic association types}} 16 void (*)(int): 0, // expected-note {{compatible type 'void (*)(int)' specified here}} 17 void (*)(void): 0); // expected-note {{compatible type 'void (*)(void)' specified here}} 18 19 (void) _Generic(0, // expected-error {{controlling expression type 'int' not compatible with any generic association type}} 20 char: 0, short: 0, long: 0); 21 22 int a1[_Generic(0, int: 1, short: 2, float: 3, default: 4) == 1 ? 1 : -1]; 23 int a2[_Generic(0, default: 1, short: 2, float: 3, int: 4) == 4 ? 1 : -1]; 24 int a3[_Generic(0L, int: 1, short: 2, float: 3, default: 4) == 4 ? 1 : -1]; 25 int a4[_Generic(0L, default: 1, short: 2, float: 3, int: 4) == 1 ? 1 : -1]; 26 int a5[_Generic(0, int: 1, short: 2, float: 3) == 1 ? 1 : -1]; 27 int a6[_Generic(0, short: 1, float: 2, int: 3) == 3 ? 1 : -1]; 28 29 int a7[_Generic("test", char *: 1, default: 2) == 1 ? 1 : -1]; 30 int a8[_Generic(g, void (*)(void): 1, default: 2) == 1 ? 1 : -1]; 31 32 const int i = 12; 33 int a9[_Generic(i, int: 1, default: 2) == 1 ? 1 : -1]; 34 35 // This is expected to not trigger any diagnostics because the controlling 36 // expression is not evaluated. 37 (void)_Generic(*(int *)0, int: 1); 38 } 39
