Will it be doxygen compatible ?
Most of our C and C++ code is documented with what's pretty close to Javadoc comments, which is one of the flavors doxygen understands. We are certainly not going to rewrite comments for another tool even if we'd like to use that tool.
Pretty much all code I've seen that's documented to be used with a documentation extraction have been doxygen, or some flavor that doxygen can handle.