refactor(lsp): add type annotations

runtime/doc/lsp.txt

@@ -1415,8 +1415,9 @@ on_publish_diagnostics({_}, {result}, {ctx}, {config})
 <
 
     Parameters: ~
+      • {result}  (`lsp.PublishDiagnosticsParams`)
       • {ctx}     (`lsp.HandlerContext`)
-      • {config}  (`table`) Configuration table (see
+      • {config}  (`vim.diagnostic.Opts?`) Configuration table (see
                   |vim.diagnostic.config()|).
 
 

runtime/lua/vim/lsp/_changetracking.lua

@@ -64,7 +64,7 @@ local state_by_group = setmetatable({}, {
 ---@param client lsp.Client
 ---@return vim.lsp.CTGroup
 local function get_group(client)
-  local allow_inc_sync = vim.F.if_nil(client.config.flags.allow_incremental_sync, true)
+  local allow_inc_sync = vim.F.if_nil(client.config.flags.allow_incremental_sync, true) --- @type boolean
   local change_capability = vim.tbl_get(client.server_capabilities, 'textDocumentSync', 'change')
   local sync_kind = change_capability or protocol.TextDocumentSyncKind.None
   if not allow_inc_sync and change_capability == protocol.TextDocumentSyncKind.Incremental then

runtime/lua/vim/lsp/_dynamic.lua

@@ -24,7 +24,7 @@ function M:supports_registration(method)
 end
 
 --- @param registrations lsp.Registration[]
---- @private
+--- @package
 function M:register(registrations)
   -- remove duplicates
   self:unregister(registrations)

runtime/lua/vim/lsp/client.lua

@@ -630,8 +630,9 @@ end
 --- @param code integer Error code
 --- @param err any Error arguments
 function Client:write_error(code, err)
-  log.error(self._log_prefix, 'on_error', { code = lsp.client_errors[code], err = err })
+  local client_error = lsp.client_errors[code] --- @type string|integer
-  err_message(self._log_prefix, ': Error ', lsp.client_errors[code], ': ', vim.inspect(err))
+  log.error(self._log_prefix, 'on_error', { code = client_error, err = err })
+  err_message(self._log_prefix, ': Error ', client_error, ': ', vim.inspect(err))
 end
 
 --- @param method string

runtime/lua/vim/lsp/diagnostic.lua

@@ -22,7 +22,7 @@ end
 ---@param severity lsp.DiagnosticSeverity
 local function severity_lsp_to_vim(severity)
   if type(severity) == 'string' then
-    severity = protocol.DiagnosticSeverity[severity]
+    severity = protocol.DiagnosticSeverity[severity] --- @type integer
   end
   return severity
 end
@@ -48,7 +48,7 @@ local function line_byte_from_position(lines, lnum, col, offset_encoding)
   local line = lines[lnum + 1]
   local ok, result = pcall(vim.str_byteindex, line, col, offset_encoding == 'utf-16')
   if ok then
-    return result
+    return result --- @type integer
   end
 
   return col
@@ -362,7 +362,7 @@ end
 --- implementation so it's simply marked @private rather than @deprecated.
 ---
 ---@param client_id integer
----@param buffer_client_map table map of buffers to active clients
+---@param buffer_client_map table<integer, table<integer, table>> map of buffers to active clients
 ---@private
 function M.reset(client_id, buffer_client_map)
   buffer_client_map = vim.deepcopy(buffer_client_map)
@@ -462,7 +462,8 @@ function M._enable(bufnr)
           return
         end
         if bufstates[bufnr] and bufstates[bufnr].enabled then
-          _refresh(bufnr, { only_visible = true, client_id = opts.data.client_id })
+          local client_id = opts.data.client_id --- @type integer?
+          _refresh(bufnr, { only_visible = true, client_id = client_id })
         end
       end,
       group = augroup,

runtime/lua/vim/lsp/health.lua

@@ -7,7 +7,7 @@ function M.check()
 
   local log = vim.lsp.log
   local current_log_level = log.get_level()
-  local log_level_string = log.levels[current_log_level]
+  local log_level_string = log.levels[current_log_level] ---@type string
   report_info(string.format('LSP log level : %s', log_level_string))
 
   if current_log_level < log.levels.WARN then

runtime/lua/vim/lsp/rpc.lua

@@ -498,7 +498,7 @@ function Client:handle_body(body)
       if decoded.error then
         decoded.error = setmetatable(decoded.error, {
           __tostring = M.format_rpc_error,
-        })
+        }) --- @type table
       end
       self:try_call(
         M.client_errors.SERVER_RESULT_CALLBACK_ERROR,

runtime/lua/vim/lsp/sync.lua

@@ -58,8 +58,7 @@ local function byte_to_utf(line, byte, offset_encoding)
   -- convert to 0 based indexing for str_utfindex
   byte = byte - 1
 
-  local utf_idx --- @type integer
+  local utf_idx, _ --- @type integer, integer
-  local _
   -- Convert the byte range to utf-{8,16,32} and convert 1-based (lua) indexing to 0-based
   if offset_encoding == 'utf-16' then
     _, utf_idx = str_utfindex(line, byte)
@@ -77,8 +76,7 @@ end
 ---@param offset_encoding string
 ---@return integer
 local function compute_line_length(line, offset_encoding)
-  local length --- @type integer
+  local length, _ --- @type integer, integer
-  local _
   if offset_encoding == 'utf-16' then
     _, length = str_utfindex(line)
   elseif offset_encoding == 'utf-32' then
@@ -202,9 +200,10 @@ end
 --- prev_end_range is the text range sent to the server representing the changed region.
 --- curr_end_range is the text that should be collected and sent to the server.
 --
----@param prev_lines table list of lines
----@param curr_lines table list of lines
 ---@param start_range table
+---@param prev_lines string[] list of lines
+---@param curr_lines string[] list of lines
+---@param firstline integer
 ---@param lastline integer
 ---@param new_lastline integer
 ---@param offset_encoding string
@@ -253,7 +252,7 @@ local function compute_end_range(
   -- Editing the same line
   -- If the byte offset is zero, that means there is a difference on the last byte (not newline)
   if prev_line_idx == curr_line_idx then
-    local max_length
+    local max_length --- @type integer
     if start_line_idx == prev_line_idx then
       -- Search until beginning of difference
       max_length = min(