1// RUN: %clang_cc1 -fsyntax-only -verify %s
2struct S {
3  S(const char *) __attribute__((nonnull(2)));
4
5  static void f(const char*, const char*) __attribute__((nonnull(1)));
6
7  // GCC has a hidden 'this' argument in member functions, so the middle
8  // argument is the one that must not be null.
9  void g(const char*, const char*, const char*) __attribute__((nonnull(3)));
10
11  void h(const char*) __attribute__((nonnull(1))); // \
12      expected-error{{invalid for the implicit this argument}}
13};
14
15void test() {
16  S s(0); // expected-warning{{null passed}}
17
18  s.f(0, ""); // expected-warning{{null passed}}
19  s.f("", 0);
20  s.g("", 0, ""); // expected-warning{{null passed}}
21  s.g(0, "", 0);
22}
23
24namespace rdar8769025 {
25  __attribute__((nonnull)) void f0(int *&p);
26  __attribute__((nonnull)) void f1(int * const &p);
27  __attribute__((nonnull(2))) void f2(int i, int * const &p);
28
29  void test_f1() {
30    f1(0); // expected-warning{{null passed to a callee which requires a non-null argument}}
31    f2(0, 0); // expected-warning{{null passed to a callee which requires a non-null argument}}
32  }
33}
34
35namespace test3 {
36__attribute__((nonnull(1))) void f(void *ptr);
37
38void g() {
39  f(static_cast<char*>((void*)0));  // expected-warning{{null passed}}
40  f(static_cast<char*>(0));  // expected-warning{{null passed}}
41}
42}
43
44namespace test4 {
45struct X {
46  bool operator!=(const void *) const __attribute__((nonnull(2)));
47};
48bool operator==(const X&, const void *) __attribute__((nonnull(2)));
49
50void test(const X& x) {
51  (void)(x == 0);  // expected-warning{{null passed}}
52  (void)(x != 0);  // expected-warning{{null passed}}
53}
54}
55