Editor Configuration

Feature/Client	emacs-ccls	vscode-ccls	atom-ide-ccls	eglot	LC-neovim	ale	vim-lsp	coc.nvim
hover	✓	✓	✓	✓	✓	✓	✓	✓
Diagnostics	lsp-ui-flycheck	✓	✓	flymake	✓	✓		✓
documentHighlight	✓	✓	✓	✓	✓			✓
signatureHelp	echo area	dropdown	✓	echo area	✓			✓
snippets	✓	✓	✓	✓				✓
codeLens	✓	✓	✓					✓
onTypeFormatting	✓	✓	✓					✓
semanticHighlight	✓	✓	✓
Custom Location[] requests	✓	Partial			✓
Hierarchical Symbol	✓	✓	✓					✓

• LC for Language Client.
• Atom IDE: atom-ide-ccls
• Emacs: eglot(depended on lsp-mode)
• (Neo)Vim: ale LanguageClient-neovim.
• VSCode: vscode-ccls

Custom Location[] requests

ccls supports many cross reference exntensions (requests that return Location[] like textDocument/definition), see https://github.com/MaskRay/ccls/wiki/FAQ#definitions and following sections.