1 // RUN: %clang_cc1 -fsyntax-only -fblocks -Wformat -verify %s -Wno-error=non-pod-varargs 2 3 int (^block) (int, const char *,...) __attribute__((__format__(__printf__,2,3))) = ^ __attribute__((__format__(__printf__,2,3))) (int arg, const char *format,...) {return 5;}; 4 5 class HasNoCStr { 6 const char *str; 7 public: 8 HasNoCStr(const char *s): str(s) { } 9 const char *not_c_str() {return str;} 10 }; 11 12 void test_block() { 13 const char str[] = "test"; 14 HasNoCStr hncs(str); 15 int n = 4; 16 block(n, "%s %d", str, n); // no-warning 17 block(n, "%s %s", hncs, n); // expected-warning{{cannot pass non-POD object of type 'HasNoCStr' to variadic block; expected type from format string was 'char *'}} expected-warning{{format specifies type 'char *' but the argument has type 'int'}} 18 } 19
