[cfe-dev] Using RecursiveASTVisitor with comment nodes

[Stephen Pegoraro via cfe-dev]

I'm working on a doc-comment tool using RecursiveASTVisitor however it
doesn't seem to work with member functions named Visit[Comment
Type]Comment.
E.g. VisitFullComment never gets called. When dumping the AST for the same
source it clearly shows the comments nested under a FunctionDecl node.

Do I have to extract the comments directly from declaration nodes? Or can I
extract them independently?
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