swift

954fa72e - [cxx-interop] Avoid circular reference errors when importing C++ structs

[cxx-interop] Avoid circular reference errors when importing C++ structs When importing a C++ struct, if its owning module requires cplusplus, Swift tried to auto-conform it to certain protocols from the Cxx module. This triggers name lookup in the clang struct, specifically for `__beginUnsafe()` and `__endUnsafe()` methods, which imports all of the base structs including their methods. This moves the import of base structs out of the name lookup request, preventing cycles. rdar://116426238 (cherry picked from commit 4632d894e67ba5a8f75bbce9197dc2ee7957ad6e)