We should aim to have a first working version of procedural macro expansion before the end of @P-E-P's internship, which happens on the 6th of August. It is fine if we end up with a semi-working version of procedural macros at that time, but we should aim to set the groundwork for these macros to be expanded properly and nicely. This will allow us to refine the system later on in a follow-up milestone.

The corresponding project is https://github.com/orgs/Rust-GCC/projects/11