Cross-references among translation units in a project

[hongxuchen]

Hi, I'm quite interested in this project and I think it provides an easy way to using clang-based analysis result as a standalone tool. I read a few code segments, and I wonder whether this could be used for cross-references among different translation units. What I care most is like "where is the definition rather than the declaration of the called function, which may reside in another .cpp file", and other similar scenarios where I need the definition rather than the declarations.

I notice that cpp_entity_id detail::get_entity_id(const CXCursor& cur) in parse_functions.cpp uses ``USR (unified symbol resource) to generate entity ids by calculating USR's hashes. My question is: can cpp_entity_id be used for cross-file references?