Test case for my last patch.

llvm-svn: 45277

clang/test/Sema/objc-comptypes-3.m

@@ -0,0 +1,62 @@
+// RUN: clang -fsyntax-only -verify %s
+extern void foo();
+#include <objc/objc.h>
+
+@protocol MyProtocolA
+- (void) methodA;
+@end
+
+@protocol MyProtocolB
+- (void) methodB;
+@end
+
+@protocol MyProtocolAB <MyProtocolA, MyProtocolB>
+@end
+
+@protocol MyProtocolAC <MyProtocolA>
+- (void) methodC;
+@end
+
+int main()
+{
+  id<MyProtocolA> obj_a = nil;
+  id<MyProtocolB> obj_b = nil;
+  id<MyProtocolAB> obj_ab = nil;
+  id<MyProtocolAC> obj_ac = nil;
+
+  obj_a = obj_b;  // expected-error {{incompatible types assigning 'id<MyProtocolB>' to 'id<MyProtocolA>'}}
+  obj_a = obj_ab; /* Ok */
+  obj_a = obj_ac; /* Ok */
+  
+  obj_b = obj_a;  // expected-error {{incompatible types assigning 'id<MyProtocolA>' to 'id<MyProtocolB>'}}
+  obj_b = obj_ab; /* Ok */
+  obj_b = obj_ac; // expected-error {{incompatible types assigning 'id<MyProtocolAC>' to 'id<MyProtocolB>'}}
+  
+  obj_ab = obj_a;  // expected-error {{incompatible types assigning 'id<MyProtocolA>' to 'id<MyProtocolAB>'}}
+  obj_ab = obj_b;  // expected-error {{incompatible types assigning 'id<MyProtocolB>' to 'id<MyProtocolAB>'}}
+  obj_ab = obj_ac; // expected-error {{incompatible types assigning 'id<MyProtocolAC>' to 'id<MyProtocolAB>'}}
+  
+  obj_ac = obj_a;  // expected-error {{incompatible types assigning 'id<MyProtocolA>' to 'id<MyProtocolAC>'}}
+  obj_ac = obj_b;  // expected-error {{incompatible types assigning 'id<MyProtocolB>' to 'id<MyProtocolAC>'}}
+  obj_ac = obj_ab; // expected-error {{incompatible types assigning 'id<MyProtocolAB>' to 'id<MyProtocolAC>'}}
+
+  if (obj_a == obj_b) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolA>' and 'id<MyProtocolB>')}}
+  if (obj_b == obj_a) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolB>' and 'id<MyProtocolA>')}}
+
+  if (obj_a == obj_ab) foo (); /* Ok */
+  if (obj_ab == obj_a) foo (); /* Ok */ 
+
+  if (obj_a == obj_ac) foo (); /* Ok */ 
+  if (obj_ac == obj_a) foo (); /* Ok */ 
+
+  if (obj_b == obj_ab) foo (); /* Ok */ 
+  if (obj_ab == obj_b) foo (); /* Ok */ 
+
+  if (obj_b == obj_ac) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolB>' and 'id<MyProtocolAC>')}} 
+  if (obj_ac == obj_b) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolAC>' and 'id<MyProtocolB>')}} 
+
+  if (obj_ab == obj_ac) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolAB>' and 'id<MyProtocolAC>')}} 
+  if (obj_ac == obj_ab) foo (); // expected-error {{invalid operands to binary expression ('id<MyProtocolAC>' and 'id<MyProtocolAB>')}} 
+
+  return 0;
+}