Maybe sourcegraph just doesn't exploit the real power of language server indexes, but the C++ language server seems pretty impoverished compared to Kythe. If I ask sourcegraph to find all references to absl::string_view::string_view(const char* str) it instead finds the substring `string_view` in any context, which is quite a useless result. Kythe gives me the actual call sites of that function signature and not the other forms, and Kythe knows the difference between absl::string_view and std::string_view.

Is it just a case of the visible implementation being a bit behind the ultimate capability of the system?