Match to do some semantic analysis on objective-c class decl.
1. Detect used of undeclared/forward declared super class.
2. Detect duplicate definition of a class.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42168 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/undef-superclass-1.m b/test/Sema/undef-superclass-1.m
new file mode 100644
index 0000000..0b5b7c1
--- /dev/null
+++ b/test/Sema/undef-superclass-1.m
@@ -0,0 +1,18 @@
+@class SUPER, Y;
+
+@interface INTF :SUPER // expected-error {{cannot find interface declaration for 'SUPER', superclass of 'INTF'}}
+@end
+
+@interface SUPER @end
+
+@interface INTF1 : SUPER
+@end
+
+@interface INTF2 : INTF1
+@end
+
+@interface INTF3 : Y // expected-error {{cannot find interface declaration for 'Y', superclass of 'INTF3'}}
+@end
+
+@interface INTF1 // expected-error {{duplicate interface declaration for class 'INTF1'}}
+@end