Has there been any attempt to standardize doc comments for C++,
similar to Javadoc
(https://download.java.net/java/early_access/loom/docs/specs/javadoc/doc-comment-spec.html)?

Doxygen-style comments have been existing practice for a long time,
and many tools support them to some extent. I could improve UX if we
had a standard syntax and a set of standard tags for such comments.