How to use c++ function that returns std::string

Development C++ interoperability
1

I'm trying out the new c++ interoperability, but having trouble working with a c++ function that returns an std::string, is that possible? A function that returns an int is fine but as soon as I try to include in the header of a c++ file I get an error saying the file is not found.

For example this function I cannot get to work in swift:

std::string test() {
    return "test";
}

My header file would look like:

#include <string>
std::string test();

I am using the latest beta of xcode with the -cxx-interoperability-mode=default flag.

2

You might be jumping the gun. :slight_smile:

3

You're saying this is not possible yet?

4

This is supported and should be working fine.
Could you please share the exact error message that you are getting?

5

Turns out that in my build settings for my library, I still had objective-c as a supported language in addition to objective-c++. Only keeping the latter resolved my problem :).

1 Like
6

Awesome, thanks for sharing!