1 // RUN: %clang_cc1 -fsyntax-only -Wformat -verify %s -Wno-error=non-pod-varargs 2 3 #include <stdarg.h> 4 5 extern "C" { 6 extern int printf(const char *restrict, ...); 7 extern int sprintf(char *, const char *restrict, ...); 8 } 9 10 class HasCStr { 11 const char *str; 12 public: 13 HasCStr(const char *s): str(s) { } 14 const char *c_str() {return str;} 15 }; 16 17 class HasNoCStr { 18 const char *str; 19 public: 20 HasNoCStr(const char *s): str(s) { } 21 const char *not_c_str() {return str;} 22 }; 23 24 extern const char extstr[16]; 25 void pod_test() { 26 char str[] = "test"; 27 char dest[32]; 28 char formatString[] = "non-const %s %s"; 29 HasCStr hcs(str); 30 HasNoCStr hncs(str); 31 int n = 10; 32 33 printf("%d: %s\n", n, hcs.c_str()); 34 printf("%d: %s\n", n, hcs); // expected-warning{{cannot pass non-POD object of type 'HasCStr' to variadic function; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}} 35 printf("%d: %s\n", n, hncs); // expected-warning{{cannot pass non-POD object of type 'HasNoCStr' to variadic function; expected type from format string was 'char *'}} 36 sprintf(str, "%d: %s", n, hcs); // expected-warning{{cannot pass non-POD object of type 'HasCStr' to variadic function; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}} 37 38 printf(formatString, hcs, hncs); // expected-warning{{cannot pass object of non-POD type 'HasCStr' through variadic function}} expected-warning{{cannot pass object of non-POD type 'HasNoCStr' through variadic function}} 39 printf(extstr, hcs, n); // expected-warning{{cannot pass object of non-POD type 'HasCStr' through variadic function}} 40 } 41 42 struct Printf { 43 Printf(); 44 Printf(const Printf&); 45 Printf(const char *,...) __attribute__((__format__(__printf__,2,3))); 46 }; 47 48 void constructor_test() { 49 const char str[] = "test"; 50 HasCStr hcs(str); 51 Printf p("%s %d %s", str, 10, 10); // expected-warning {{format specifies type 'char *' but the argument has type 'int'}} 52 Printf q("%s %d", hcs, 10); // expected-warning {{cannot pass non-POD object of type 'HasCStr' to variadic constructor; expected type from format string was 'char *'}} expected-note{{did you mean to call the c_str() method?}} 53 } 54
