rtags - 2.21-3 main

RTags is a client/server application that indexes C/C++ code and
keeps a persistent file-based database of references, declarations,
definitions, symbolnames etc. There’s also limited support for
ObjC/ObjC++. It allows you to find symbols by name (including nested
class and namespace scope). Most importantly it gives you proper
follow-symbol and find-references support. It also have neat little
things like rename-symbol, integration with clang’s “fixits”
(https://clang.llvm.org/diagnostics.html).