Add coc.nvim

_Sidebar.md

@@ -6,6 +6,7 @@
   - [[FAQ]]
 * Editor configuration
   - [[Emacs]]
+  - [[coc.nvim]]
   - [[LanguageClient-neovim]]
   - [[vim-lsp]]
   - [[Visual Studio Code]]

coc.nvim.md

@@ -0,0 +1,90 @@
+1. See [[Getting started]] to build the `ccls` executable
+2. Install [coc.nvim](https://github.com/neoclide/coc.nvim)
+
+`~/.config/nvim/coc-settings.json`
+```json
+{
+  "languageserver": {
+    "ccls": {
+      "command": "ccls",
+      "filetypes": ["c", "cpp", "cuda", "objc", "objcpp"],
+      "initializationOptions": {}
+    }
+  }
+}
+```
+
+First example:
+
+```zsh
+cd /tmp; mkdir c; cd c
+git init  # let coc.nvim know this is a project
+echo '#include <stddef.h>\nint main() {}' > a.cc
+nvim a.cc
+```
+
+For a larger project, you'll need [[.ccls|Getting-started#ccls]] or [[compile_commands.json]] in your project root.
+
+These features will work out-of-the-box. Find more on coc.nvim's README.
+
+```vim
+nmap <silent> <M-j> <Plug>(coc-definition)
+nmap <silent> <C-,> <Plug>(coc-references)
+nn <silent> K :call CocActionAsync('doHover')<cr>
+```
+
+### `textDocument/documentHighlight`
+
+```vim
+set updatetime=300
+au CursorHold * sil call CocActionAsync('highlight')
+au CursorHoldI * sil call CocActionAsync('showSignatureHelp')
+```
+
+### `$ccls/navigate`
+
+Semantic navigation. Roughly,
+
+"D" => first child declaration
+"L" => previous declaration
+"R" => next declaration
+"U" => parent declaration
+
+```vim
+nn <silent><buffer> <C-l> :call CocLocations('ccls','$ccls/navigate',{'direction':'D'})<cr>
+nn <silent><buffer> <C-k> :call CocLocations('ccls','$ccls/navigate',{'direction':'L'})<cr>
+nn <silent><buffer> <C-j> :call CocLocations('ccls','$ccls/navigate',{'direction':'R'})<cr>
+nn <silent><buffer> <C-h> :call CocLocations('ccls','$ccls/navigate',{'direction':'U'})<cr>
+```
+
+### Cross reference extensions
+
+```vim
+" bases
+nn <silent> xb :call CocLocations('ccls','$ccls/inheritance')<cr>
+" bases of up to 3 levels
+nn <silent> xb :call CocLocations('ccls','$ccls/inheritance',{'levels':3})<cr>
+" derived
+nn <silent> xd :call CocLocations('ccls','$ccls/inheritance',{'derived':v:true})<cr>
+" derived of up to 3 levels
+nn <silent> xD :call CocLocations('ccls','$ccls/inheritance',{'derived':v:true,'levels':3})<cr>
+
+" caller
+nn <silent> xc :call CocLocations('ccls','$ccls/call')<cr>
+" callee
+nn <silent> xC :call CocLocations('ccls','$ccls/call',{'callee':v:true})<cr>
+
+" $ccls/member
+" member variables / variables in a namespace
+nn <silent> xm :call CocLocations('ccls','$ccls/member')<cr>
+" member functions / functions in a namespace
+nn <silent> xf :call CocLocations('ccls','$ccls/member',{'kind':3})<cr>
+" nested classes / types in a namespace
+nn <silent> xs :call CocLocations('ccls','$ccls/member',{'kind':2})<cr>
+
+nmap <silent> xt <Plug>(coc-type-definition)<cr>
+nn <silent> xv :call CocLocations('ccls','$ccls/vars')<cr>
+nn <silent> xV :call CocLocations('ccls','$ccls/vars',{'kind':1})<cr>
+
+nn xx x
+```