Ruby rubocop-ast
From wikinotes
A DSL for ruby parser that simplifies matching AST nodes.
Documentation
All AST nodes https://github.com/rubocop/rubocop-ast/blob/master/docs/modules/ROOT/pages/node_types.adoc official docs https://docs.rubocop.org/rubocop-ast/ test patterns https://nodepattern.herokuapp.com/
Usage
there's a lisp-like DSL for matching nodes
_ // any one thing ... // any number of items(const _ _) # any const (casgn <(const _ _) ...>) # any const being assigned via 'casgn'