swift

6cd4b7c2 - [cxx-interop] Make `std::string::append` usable from Swift

[cxx-interop] Make `std::string::append` usable from Swift This adds a new Swift overload for `append` that takes another `std::string` as a parameter. The original C++ overload for `append` is not exposed into Swift because it returns a mutable reference `string&`. rdar://107018724