1 files changed, 58 insertions, 0 deletions
diff --git a/clang/test/SemaObjC/forward-class-1.m b/clang/test/SemaObjC/forward-class-1.m
new file mode 100644
index 0000000..85c6c87
--- /dev/null
+++ b/clang/test/SemaObjC/forward-class-1.m
@@ -0,0 +1,58 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s
+
+@class FOO, BAR; // expected-note {{forward declaration of class here}}
+@class FOO, BAR; 
+
+@interface INTF : FOO	// expected-error {{attempting to use the forward class 'FOO' as superclass of 'INTF'}}
+@end
+
+@interface FOO 
+- (BAR*) Meth1;
+- (FOO*) Meth2;
+@end
+
+@interface INTF1 : FOO	
+@end
+
+@interface INTF2 : INTF1 // expected-note {{previous definition is here}}
+@end
+
+
+@class INTF1, INTF2;
+
+@interface INTF2 : INTF1 // expected-error {{duplicate interface definition for class 'INTF2'}}
+@end
+
+// 2nd test of a forward class declaration matching a typedef name
+// referring to class object.
+// FIXME. This may become a negative test should we decide to make this an error.
+//
+@interface NSObject @end
+
+@protocol XCElementP @end
+
+typedef NSObject <XCElementP> XCElement; // expected-note {{previous definition is here}}
+
+@interface XCElementMainImp  {
+  XCElement * _editingElement;
+}
+@end
+
+@class XCElement; // expected-warning {{redefinition of forward class 'XCElement' of a typedef name of an object type is ignored}}
+
+@implementation XCElementMainImp
+- (XCElement *)editingElement  { return _editingElement;  }
+@end
+
+
+// rdar://9653341
+@class B; // expected-note {{forward declaration of class here}}
+@interface A : B {} // expected-error {{attempting to use the forward class 'B' as superclass of 'A'}}
+@end
+
+@interface B : A {}
+@end
+
+@implementation A @end
+@implementation B @end
+