1 // RUN: %clang_analyze_cc1 -analyzer-checker=optin.osx.OSObjectCStyleCast %s -verify
2 #include "os_object_base.h"
3 
4 struct OSArray : public OSObject {
5   unsigned getCount();
6 };
7 
8 struct A {
9   int x;
10 };
11 struct B : public A {
12   unsigned getCount();
13 };
14 
15 unsigned warn_on_explicit_downcast(OSObject * obj) {
16   OSArray *a = (OSArray *) obj; // expected-warning{{C-style cast of OSObject. Use OSDynamicCast instead}}
17   return a->getCount();
18 }
19 
20 void no_warn_on_upcast(OSArray *arr) {
21   OSObject *obj = (OSObject *) arr;
22   obj->retain();
23   obj->release();
24 }
25 
26 unsigned no_warn_on_dynamic_cast(OSObject *obj) {
27   OSArray *a = OSDynamicCast(OSArray, obj);
28   return a->getCount();
29 }
30 
31 __SIZE_TYPE__ no_warn_on_primitive_conversion(OSArray *arr) {
32   return (__SIZE_TYPE__) arr;
33 }
34 
35 unsigned no_warn_on_other_type_cast(A *a) {
36   B *b = (B *) a;
37   return b->getCount();
38 }
39 
40