CPP Interoperability

Welcome to the CPP Interoperability series! The point of this blog series is to walk through the different parts of the Swift Compiler which enable CPP Interoperability.

I am writing this blog series because I have learn't from my initial contributions that starting is daunting but completely doable with a helping hand. Someone to explain the different parts, the flow, etc.

For the purpose of this series I will assume you already have the Swift compiler setup and building. The series will focus less on building/running and more on walking through the code and explaining where things live, how tests are written/work, etc.

Hopefully by following this series you will be able to contribute to swift yourself! (at least to the cxx interop portion).

Enabling CXX Interop

Although I said I would not focus much on setup, one important note related to cxx interop today is that it is not enabled out-of-the-box. To enable cxx interop we must pass the -enable-experimental-cxx-interop compiler flag to the compiler.

Where in the repo we will be focused

Lucky for us the CXX Interop part of the compiler is fairly isolated inside the swift/lib/ClangImporter folder.

I will leave us here and pick up the next post on the flow!