A walkthough on how to write derive procedural macros

This is a really informative post on how to write Rust macros. It's totally free. You can check it out and give your reviews.

A Beginner’s Guide to Rust Procedural Macros: Creating a JSON Derive Macro https://medium.com/@otukof/a-beginners-guide-to-rust-procedural-macros-creating-a-json-derive-macro-eb44279e7244