1 files changed, 91 insertions, 0 deletions
diff --git a/test/SemaObjC/comptypes-1.m b/test/SemaObjC/comptypes-1.m
new file mode 100644
index 0000000..8717bd0
--- /dev/null
+++ b/test/SemaObjC/comptypes-1.m
@@ -0,0 +1,91 @@
+// RUN: clang-cc -fsyntax-only -verify -pedantic %s
+
+#define nil (void *)0;
+#define Nil (void *)0;
+
+extern void foo();
+
+@protocol MyProtocol
+- (void) foo;
+@end
+
+@interface MyClass
+@end
+
+@interface MyOtherClass <MyProtocol>
+- (void) foo;
+@end
+
+int main()
+{
+  id obj = nil;
+  id<MyProtocol> obj_p = nil;
+  MyClass *obj_c = nil;
+  MyOtherClass *obj_cp = nil;
+  Class obj_C = Nil;
+
+  /* Assigning to an 'id' variable should never
+     generate a warning.  */
+  obj = obj_p;  /* Ok  */
+  obj = obj_c;  /* Ok  */
+  obj = obj_cp; /* Ok  */
+  obj = obj_C;  /* Ok  */
+  
+  /* Assigning to a 'MyClass *' variable should always generate a
+     warning, unless done from an 'id'.  */
+  obj_c = obj;    /* Ok */
+  obj_c = obj_cp; // // expected-warning {{incompatible pointer types assigning 'MyOtherClass *', expected 'MyClass *'}}
+  obj_c = obj_C;
+
+  /* Assigning to an 'id<MyProtocol>' variable should generate a
+     warning if done from a 'MyClass *' (which doesn't implement
+     MyProtocol), but not from an 'id' or from a 'MyOtherClass *'
+     (which implements MyProtocol).  */
+  obj_p = obj;    /* Ok */
+  obj_p = obj_c;  // expected-warning {{incompatible type assigning 'MyClass *', expected 'id<MyProtocol>'}}
+  obj_p = obj_cp; /* Ok  */
+  obj_p = obj_C;  // Ok
+
+  /* Assigning to a 'MyOtherClass *' variable should always generate
+     a warning, unless done from an 'id' or an 'id<MyProtocol>' (since
+     MyOtherClass implements MyProtocol).  */
+  obj_cp = obj;    /* Ok */
+  obj_cp = obj_c;  // expected-warning {{incompatible pointer types assigning 'MyClass *', expected 'MyOtherClass *'}}
+  obj_cp = obj_p;  /* Ok */
+  obj_cp = obj_C;
+
+  /* Any comparison involving an 'id' must be without warnings.  */
+  if (obj == obj_p) foo() ;  /* Ok  */ /*Bogus warning here in 2.95.4*/
+  if (obj_p == obj) foo() ;  /* Ok  */
+  if (obj == obj_c) foo() ;  /* Ok  */
+  if (obj_c == obj) foo() ;  /* Ok  */
+  if (obj == obj_cp) foo() ; /* Ok  */
+  if (obj_cp == obj) foo() ; /* Ok  */
+  if (obj == obj_C) foo() ;  /* Ok  */
+  if (obj_C == obj) foo() ;  /* Ok  */
+
+  /* Any comparison between 'MyClass *' and anything which is not an 'id'
+     must generate a warning.  */
+  /* FIXME: GCC considers this a warning ("comparison of distinct pointer types"). */
+  /* There is a corresponding FIXME in ASTContext::mergeTypes() */
+  if (obj_p == obj_c) foo() ;
+
+  if (obj_c == obj_cp) foo() ; // expected-warning {{comparison of distinct pointer types ('MyClass *' and 'MyOtherClass *')}} 
+  if (obj_cp == obj_c) foo() ; // expected-warning {{comparison of distinct pointer types ('MyOtherClass *' and 'MyClass *')}}
+
+  if (obj_c == obj_C) foo() ;
+  if (obj_C == obj_c) foo() ;
+
+  /* Any comparison between 'MyOtherClass *' (which implements
+     MyProtocol) and an 'id' implementing MyProtocol are Ok.  */
+  if (obj_cp == obj_p) foo() ; /* Ok */
+  if (obj_p == obj_cp) foo() ; /* Ok */
+
+
+  if (obj_p == obj_C) foo() ;  
+  if (obj_C == obj_p) foo() ;
+  if (obj_cp == obj_C) foo() ;  
+  if (obj_C == obj_cp) foo() ;
+
+  return 0;
+}