erichkeane added a comment.
Tighten up the 'IUnknown' check, and do the check I mentioned above, and I
think this logic is correct. Searching would be required in the positive case,
but this is the negative case.
================
Comment at: lib/Sema/SemaDeclCXX.cpp:2483
+ !IsDeclPublicInterface(RD, KnownBase->getAccessSpecifier()) &&
+ !IsOrInheritsFromIUnknown(RD)) {
Diag(KnownBase->getLocStart(), diag::err_invalid_base_in_interface)
----------------
So, I just realized... this call here is useless, we got sidetracked because of
the inversion of logic here. You ACTUALLY just care that this base is either a
public interface, OR if it is IUnknown. This logic can be:
if (Class->isInterface() && !IsDeclPublicInterface(...) &&
!IsIUnknownType(...)) {...}
The search doesn't actually need to take place, since the current base COULD
NOT be a valid 'interface' unless it inherited only from interfaces/IUnknown
anyway. Unless I'm missing something, you can delete the function
"IsOrInheritsFromIUnknown" as well.
https://reviews.llvm.org/D37308
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