Ccls is a C/C++/Objective-C language server with the following
features:

- Code completion (with both signature help and snippets)
- Definition/references, and other cross references
- Cross reference extensions: $ccls/call $ccls/inheritance $ccls/member
  $ccls/vars ...
- Formatting
- Hierarchies: call (caller/callee) hierarchy, inheritance
  (base/derived) hierarchy, member hierarchy
- Symbol rename
- Document symbols and approximate search of workspace symbol
- Hover information
- Diagnostics and code actions (clang FixIts)
- Semantic highlighting and preprocessor skipped regions
- Semantic navigation: $ccls/navigate

WWW: https://github.com/MaskRay/ccls