Let's say you want to scan for C++ forward declarations in a codebase. Specifically the Chromium codebase.

This Gist captures some details about how to do that with ast-grep. You may also want jq for a few of the commands.

Setup

• Make sure you have ast-grep and jq installed
• Copy sgconfig.yml to the root of the Chromium repo
• Create a folder at the root of the Chromium repo called ast-grep-rules
• Copy forward-declaration.yaml into that folder