swift

929c0ca7 - [cxx-interop] Introduce a safe C++ interop mode

[cxx-interop] Introduce a safe C++ interop mode In this mode all C++ types are imported as unsafe by default. Users explicitly marking types are escapable or not escapable can make them imported as safe. In the future, we also want to import unannotated functions as unsafe and add more logic to infer types that are actually safe, like agregates of escapable types.