Rule object is the core concept of ast-grep's rule system and every otherfeatures are built on top of it.

Rule object is the core concept of ast-grep's rule system and every otherfeature is built on top of it.

Below is the full list of fields in a rule object. Every rule field is optional and can be omitted but at least one field should be present in a rule. A node will match a rule if and only if it satisfies all fields in the rule object.