[cxx-interop] Test for apinotes fix in llvm-project. #41827
Merged
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This is the test that goes with swiftlang/llvm-project#4074
In the PR to apple/llvm-project we were bailing on DeclContexts that
were not isFileContext == true. This is problematic because with
C++-Interop enabled we can end up with a DeclContext that is an extern
"C". This test makes sure that the APINote is applied and that the code
from the 4074 PR no longer bails out.
Note: The llvm-project change is in apple/llvm-project rather than llvm/llvm-project because the file clang/lib/Sema/SemaAPINotes.cpp has not been upstreamed to llvm.org yet.