I had a few minutes spare this morning so I rushed out a summary video of how MetaDocs is looking after the jam (apologies for lack of polish, I didn't have time to plan it out fully): https://youtu.be/kKppU0zcXjM

Highlights:

• reading clang's AST from JSON into C structures, deduplicating repeated nodes
• converting that into a more convenient structure for navigating symbols and their attached documentation comments
• starting to autogenerate a markdown-like syntax for symbols and attaching the documentation text
• evaluating constant expressions from the AST for enum values

Still to finish:

• representing primitive types in the same way as custom types
• finalising binary and JSON outputs
• complete example translating to a final HTML
• library methods to assist with references between documentation and symbols
• proper scoping of types