Can Doxygen be configured to omit fundamental C++ types from collaboration diagrams?

Question

Is there a way to prevent Doxygen from including fundamental C++ types (int, float, etc) in the diagrams it produces? For example, when a collaboration diagram includes a large number of user-defined types, knowing that they all use int internally isn't as useful as seeing the relationships between the types, and the large number of lines from all parts of the diagram to the int type makes the diagram visually "busy" and harder to read.

Ideally, code would be sufficiently well-designed and modular that collaboration diagrams would be small and simple, and the inclusion of fundamental types wouldn't be a problem. But one situation in which Doxygen really shines is when there's a large amount of badly-written code which the user has to get to grips with and get to work on as quickly as possible, and it would be good to simplify the collaboration diagrams in this case.

I know that reducing MAX_DOT_GRAPH_DEPTH can simplify collaboration diagrams, but this reduces the number of both user-defined types and fundamental types. To make the best use of the space available in the diagram, I'd like to include just user-defined types.

Answer 1

With HIDE_UNDOC_RELATIONS set to YES in the configuration file, doxygen should omit fundamental and otherwise undocumented types from the diagrams.