Documentation specifically about C++ interop?

[Wallby]

Is there any documentation specifically about writing interoperability code between C++ and CPP2?

I saw that cppfront has the -p flag to only allow CPP2 syntax, which I assume means that you can write regular C++ code inside of any CPP2 file? I haven't tried it, so not sure if that is what it means. Or only in specific parts?

Given that CPP2 generates some things using std/stl stuff, and changes around some defaults of what is mutable or constant. I couldn't find any documentation page that puts that information in one place.

[hsutter]

Yes, there is! You can find it here: Mixing Cpp1 (today's C++) and Cpp2 in the same source file. Th

[Wallby]

Thanks!

[Wallby]

Does this also work with newer C++ features, specifically modules and their visibility? For example, is it possible to write interop functions that are not exported from a module. And export CPP2 functions from the module?

[hsutter]

Re module support, see #1126 and my reply when closing #569.