Writing a formatter has never been so easy: a Topiary tutorial

Yann Hamdaoui has written a step-by-step guide on how to write a new formatter for your own language, starting from zero.

Part 1

Part 1 introduces Topiary and motivates its use to create a formatter for a toy language, Yolo. Yann first guides you through the creation of a Tree-sitter grammar for Yolo, then plugs it into Topiary to write its formatting queries.