1 // RUN: %clang_cc1 %s -fsyntax-only -verify -fblocks
2 
3 #include <stdarg.h>
4 
main()5 int main() {
6   void (^b) (int arg, const char * format, ...) __attribute__ ((__format__ (__printf__, 1, 3))) =   // expected-error {{format argument not a string type}}
7     ^ __attribute__ ((__format__ (__printf__, 1, 3))) (int arg, const char * format, ...) {}; // expected-error {{format argument not a string type}}
8 
9   void (^z) (int arg, const char * format, ...) __attribute__ ((__format__ (__printf__, 2, 3))) = ^ __attribute__ ((__format__ (__printf__, 2, 3))) (int arg, const char * format, ...) {};
10 
11   z(1, "%s", 1); // expected-warning{{format specifies type 'char *' but the argument has type 'int'}}
12   z(1, "%s", "HELLO"); // no-warning
13 }
14 
multi_attr(va_list ap,int * x,long * y)15 void multi_attr(va_list ap, int *x, long *y) {
16   // Handle block with multiple format attributes.
17   void (^vprintf_scanf) (const char *, va_list, const char *, ...) __attribute__((__format__(__printf__, 1, 0))) __attribute__((__format__(__scanf__, 3, 4))) =
18   ^ __attribute__((__format__(__printf__, 1, 0))) __attribute__((__format__(__scanf__, 3, 4))) (const char *str, va_list args, const char *fmt, ...) {};
19 
20   vprintf_scanf("%", ap, "%d"); // expected-warning {{incomplete format specifier}}, expected-warning {{more '%' conversions than data arguments}}
21 }
22