test/SemaObjCXX/arc-bridged-cast.mm

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fsyntax-only -fobjc-arc -fblocks -verify %s
   2
   3 typedef const void *CFTypeRef;
   4 typedef const struct __CFString *CFStringRef;
   5
   6 @interface NSString
   7 @end
   8
   9 CFTypeRef CFCreateSomething();
  10 CFStringRef CFCreateString();
  11 CFTypeRef CFGetSomething();
  12 CFStringRef CFGetString();
  13
  14 id CreateSomething();
  15 NSString *CreateNSString();
  16
  17 template<typename IdType, typename StringType, typename IntPtrType>
  18 void from_cf() {
  19   id obj1 = (__bridge_transfer IdType)CFCreateSomething();
  20   id obj2 = (__bridge_transfer StringType)CFCreateString();
  21   (__bridge IntPtrType)CFCreateSomething(); // expected-error{{incompatible types casting 'CFTypeRef' (aka 'const void *') to 'int *' with a __bridge cast}}
  22   id obj3 = (__bridge IdType)CFGetSomething();
  23   id obj4 = (__bridge StringType)CFGetString();
  24 }
  25
  26 template void from_cf<id, NSString*, int*>(); // expected-note{{in instantiation of function template specialization}}
  27
  28 template<typename IdType, typename StringType>
  29 void to_cf(id obj) {
  30   CFTypeRef cf1 = (__bridge_retained IdType)CreateSomething();
  31   CFStringRef cf2 = (__bridge_retained StringType)CreateNSString();
  32   CFTypeRef cf3 = (__bridge IdType)CreateSomething();
  33   CFStringRef cf4 = (__bridge StringType)CreateNSString();
  34 }
  35
  36 template void to_cf<CFTypeRef, CFStringRef>(id);
  37
  38 // rdar://problem/20107345
  39 typedef const struct __attribute__((objc_bridge(id))) __CFAnnotatedObject *CFAnnotatedObjectRef;
  40 CFAnnotatedObjectRef CFGetAnnotated();
  41
  42 void testObjCBridgeId() {
  43   id obj;
  44   obj = (__bridge id)CFGetAnnotated();
  45   obj = (__bridge NSString*)CFGetAnnotated();
  46   obj = (__bridge_transfer id)CFGetAnnotated();
  47   obj = (__bridge_transfer NSString*)CFGetAnnotated();
  48
  49   CFAnnotatedObjectRef ref;
  50   ref = (__bridge CFAnnotatedObjectRef) CreateSomething();
  51   ref = (__bridge CFAnnotatedObjectRef) CreateNSString();
  52   ref = (__bridge_retained CFAnnotatedObjectRef) CreateSomething();
  53   ref = (__bridge_retained CFAnnotatedObjectRef) CreateNSString();
  54 }
  55
  56 struct __CFAnnotatedObject {
  57 } cf0;
  58
  59 extern const CFAnnotatedObjectRef r0;
  60 extern const CFAnnotatedObjectRef r1 = &cf0;
  61 extern "C" const CFAnnotatedObjectRef r2;
  62 extern "C" const CFAnnotatedObjectRef r3 = &cf0;
  63
  64 void testExternC() {
  65   id obj;
  66   obj = (id)r0;
  67   obj = (id)r1; // expected-error{{cast of C pointer type 'CFAnnotatedObjectRef' (aka 'const __CFAnnotatedObject *') to Objective-C pointer type 'id' requires a bridged cast}} expected-note{{use __bridge to convert directly}} expected-note{{use __bridge_transfer to transfer ownership of a +1 'CFAnnotatedObjectRef'}}
  68   obj = (id)r2;
  69   obj = (id)r3; // expected-error{{cast of C pointer type 'CFAnnotatedObjectRef' (aka 'const __CFAnnotatedObject *') to Objective-C pointer type 'id' requires a bridged cast}} expected-note{{use __bridge to convert directly}} expected-note{{use __bridge_transfer to transfer ownership of a +1 'CFAnnotatedObjectRef'}}
  70 }