Comment by bkryza

Yes, absolutely, in fact clang-uml also uses Doxygen for it's own documentation - although diagrams are 'self'-generated by clang-uml - for instance see here: https://clang-uml.github.io/structclanguml_1_1config_1_1conf...

However, the main difference between clang-uml and Doxygen is that in Doxygen the diagrams are a by-product of generated documentation. clang-uml aims to give you much more control over what you want in your diagrams, without having to use Doxygen or any other documentation tool, which possibly makes it more flexible in how you can use its output.

Obviously, which approach you prefer depends on your use case and needs.