1 // RUN: %clang_cc1 -fblocks -fsyntax-only -verify %s 2 3 void (^e) (int arg, const char * format, ...) __attribute__ ((__sentinel__ (1,1))); 4 5 int main() { 6 void (^bbad) (int arg, const char * format) __attribute__ ((__sentinel__)) ; // expected-warning {{sentinel' attribute only supported for variadic blocks}} 7 void (^b) (int arg, const char * format, ...) __attribute__ ((__sentinel__)) = // expected-note {{block has been explicitly marked sentinel here}} 8 ^ __attribute__ ((__sentinel__)) (int arg, const char * format, ...) {}; 9 void (^z) (int arg, const char * format, ...) __attribute__ ((__sentinel__ (2))) = ^ __attribute__ ((__sentinel__ (2))) (int arg, const char * format, ...) {}; // expected-note {{block has been explicitly marked sentinel here}} 10 11 12 void (^y) (int arg, const char * format, ...) __attribute__ ((__sentinel__ (5))) = ^ __attribute__ ((__sentinel__ (5))) (int arg, const char * format, ...) {}; // expected-note {{block has been explicitly marked sentinel here}} 13 14 b(1, "%s", (void*)0); // OK 15 b(1, "%s", 0); // expected-warning {{missing sentinel in block call}} 16 z(1, "%s",4 ,1,0); // expected-warning {{missing sentinel in block call}} 17 z(1, "%s", (void*)0, 1, 0); // OK 18 19 y(1, "%s", 1,2,3,4,5,6,7); // expected-warning {{missing sentinel in block call}} 20 21 y(1, "%s", (void*)0,3,4,5,6,7); // OK 22 23 } 24 25
