This section of the course covers interacting with Rust and external languages via its foreign-function interface (FFI), with a special focus on interoperability with C++.

Ideally, users of Rust and the external language (in this case C++) could call each others’ methods directly.

This ideal scenario is very difficult to achieve:

Different languages have different semantics and mapping between them implies trade-offs Neither Rust nor C++ offer ABI stability¹, making it difficult to build from a stable foundation