erichkeane added a comment. A bit more research based on a different implementation:
First, there are TWO special types, not just IUnknown! There is also "IDispatch" with UUID: "00020400-0000-0000-c000-000000000046" A type is 'interface like' if: -it has a ZERO virtual inheritance bases -it has AT LEAST 1 'interface-like' base (interfaces are not 'interface_like' here) -it has ZERO non-interface/non-interface-like bases. -it has zero user defined destructors, constructors, operators, or conversions -it has zero DEFINED methods -it has ZERO data members -it does not have 'private' or 'protected' data access specifiers -it does not have any "friend" decls. An __interface can inherit from other __interfaces, or interface-like bases. However, it is limited to only 1 of the latter. SO, in your example, "Page5" loses its interface-like-ness because it has 2 separate interface-like bases. https://reviews.llvm.org/D37308 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
