Practical Procedural Macros in Rust

I would very much second the suggestion to do David Tolnay’s Proc Macro Workshop if you want to start understanding how to write them. I’d been writing Rust for years but always kind of avoided proc macros.

When I had a need for them, I went through only the first section of the workshop and everything clicked. You can just do the derive macro section and all the strange and scary-looking macro syntax will make sense. I realized that there is only a bit of extra syntax but it’s used very often so it can seem a little overwhelming when reading macro code.

https://github.com/dtolnay/proc-macro-workshop

This is super useful! I'm trying to write my first real, quite involved proc_macro library (https://github.com/martijnarts/smooth_grahpql), and getting an overview of what all is and isn't possible and where to start has been a pain. It might be worth highlighting https://crates.io/crates/darling, also, I've found it very useful.

I'd especially been missing the testing bit! Thanks!

Nice blog, another very useful crate to use when working with proc-macro is https://github.com/dtolnay/prettyplease, for formatting generated code (very useful for debugging!), that does not bails out like rustfmt sometimes does.