swift

9d829ed5 - [cxx-interop] Support @cxx @implementation for C++ namespace members

[cxx-interop] Support @cxx @implementation for C++ namespace members Allow a @cxx @implementation function to be declared in a Swift extension of an imported C++ namespace (which imports as an enum) and match a function declared in that namespace, including nested namespaces, @cxx(...) renames, and arity overloads. rdar://185906884