1// RUN: %clang_cc1 -fsyntax-only -Wformat -verify %s -Wno-error=non-pod-varargs
2
3#include <stdarg.h>
4
5extern "C" {
6extern int printf(const char *restrict, ...);
7extern int sprintf(char *, const char *restrict, ...);
8}
9
10class HasCStr {
11  const char *str;
12 public:
13  HasCStr(const char *s): str(s) { }
14  const char *c_str() {return str;}
15};
16
17class HasNoCStr {
18  const char *str;
19 public:
20  HasNoCStr(const char *s): str(s) { }
21  const char *not_c_str() {return str;}
22};
23
24extern const char extstr[16];
25void 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
42struct Printf {
43  Printf();
44  Printf(const Printf&);
45  Printf(const char *,...) __attribute__((__format__(__printf__,2,3)));
46};
47
48void 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