add configuration for clangd lsp so that it has full feature support

lua/custom/plugins/lsp-clangd.lua

@@ -2,5 +2,51 @@ return {
   'neovim/nvim-lspconfig',
   config = function()
     require('lspconfig').clangd.setup {}
+
+    vim.api.nvim_create_autocmd('LspAttach', {
+      group = vim.api.nvim_create_augroup('UserLspConfig', {}),
+      callback = function(ev)
+        -- Enable completion triggered by <c-x><c-o>
+        vim.bo[ev.buf].omnifunc = 'v:lua.vim.lsp.omnifunc'
+
+        -- Buffer local mappings.
+        -- See `:help vim.lsp.*` for documentation on any of the below functions
+        local bufnr = ev.buf
+
+        local nmap = function(keys, func, desc)
+          if desc then
+            desc = 'LSP: ' .. desc
+          end
+
+          vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
+        end
+
+        nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
+        nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')
+        nmap('gd', vim.lsp.buf.definition, '[G]oto [D]efinition')
+        nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
+        nmap('gI', vim.lsp.buf.implementation, '[G]oto [I]mplementation')
+        nmap('<leader>D', vim.lsp.buf.type_definition, 'Type [D]efinition')
+        nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
+        nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')
+
+        -- See `:help K` for why this keymap
+        nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
+        nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')
+
+        -- Lesser used LSP functionality
+        nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
+        nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
+        nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
+        nmap('<leader>wl', function()
+          print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+        end, '[W]orkspace [L]ist Folders')
+
+        -- Create a command `:Format` local to the LSP buffer
+        vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
+          vim.lsp.buf.format()
+        end, { desc = 'Format current buffer with LSP' })
+      end,
+    })
   end
 }