Merge remote-tracking branch 'upstream/master' into floattitlefloattitle

1 files changed, 346 insertions, 523 deletions

diff --git a/runtime/lua/vim/_meta.lua b/runtime/lua/vim/_meta.lua
index f1652718ee..9c7972873e 100644
--- a/runtime/lua/vim/_meta.lua
+++ b/runtime/lua/vim/_meta.lua
@@ -1,173 +1,113 @@
--- prevents luacheck from making lints for setting things on vim
-local vim = assert(vim)
-
 local a = vim.api
-local validate = vim.validate
-
-local SET_TYPES = setmetatable({
-  SET = 0,
-  LOCAL = 1,
-  GLOBAL = 2,
-}, { __index = error })
-
-local options_info = nil
-local buf_options = nil
-local glb_options = nil
-local win_options = nil
-
-local function _setup()
-  if options_info ~= nil then
-    return
-  end
-  options_info = {}
-  for _, v in pairs(a.nvim_get_all_options_info()) do
-    options_info[v.name] = v
-    if v.shortname ~= '' then
-      options_info[v.shortname] = v
-    end
-  end
 
-  local function get_scoped_options(scope)
-    local result = {}
-    for name, option_info in pairs(options_info) do
-      if option_info.scope == scope then
-        result[name] = true
+-- TODO(tjdevries): Improve option metadata so that this doesn't have to be hardcoded.
+--                  Can be done in a separate PR.
+local key_value_options = {
+  fillchars = true,
+  fcs = true,
+  listchars = true,
+  lcs = true,
+  winhighlight = true,
+  winhl = true,
+}
+
+--- Convert a vimoption_T style dictionary to the correct OptionType associated with it.
+---@return string
+local function get_option_metatype(name, info)
+  if info.type == 'string' then
+    if info.flaglist then
+      return 'set'
+    elseif info.commalist then
+      if key_value_options[name] then
+        return 'map'
       end
+      return 'array'
     end
-
-    return result
+    return 'string'
   end
-
-  buf_options = get_scoped_options('buf')
-  glb_options = get_scoped_options('global')
-  win_options = get_scoped_options('win')
+  return info.type
 end
 
-local function make_meta_accessor(get, set, del, validator)
-  validator = validator or function()
-    return true
-  end
-
-  validate({
-    get = { get, 'f' },
-    set = { set, 'f' },
-    del = { del, 'f', true },
-    validator = { validator, 'f' },
-  })
+local options_info = setmetatable({}, {
+  __index = function(t, k)
+    local info = a.nvim_get_option_info(k)
+    info.metatype = get_option_metatype(k, info)
+    rawset(t, k, info)
+    return rawget(t, k)
+  end,
+})
 
-  local mt = {}
-  function mt:__newindex(k, v)
-    if not validator(k) then
-      return
+vim.env = setmetatable({}, {
+  __index = function(_, k)
+    local v = vim.fn.getenv(k)
+    if v == vim.NIL then
+      return nil
     end
+    return v
+  end,
 
-    if del and v == nil then
-      return del(k)
-    end
-    return set(k, v)
-  end
-  function mt:__index(k)
-    if not validator(k) then
-      return
-    end
+  __newindex = function(_, k, v)
+    vim.fn.setenv(k, v)
+  end,
+})
 
-    return get(k)
+local function opt_validate(option_name, target_scope)
+  local scope = options_info[option_name].scope
+  if scope ~= target_scope then
+    local scope_to_string = { buf = 'buffer', win = 'window' }
+    error(
+      string.format(
+        [['%s' is a %s option, not a %s option. See ":help %s"]],
+        option_name,
+        scope_to_string[scope] or scope,
+        scope_to_string[target_scope] or target_scope,
+        option_name
+      )
+    )
   end
-  return setmetatable({}, mt)
 end
 
-vim.env = make_meta_accessor(function(k)
-  local v = vim.fn.getenv(k)
-  if v == vim.NIL then
-    return nil
-  end
-  return v
-end, vim.fn.setenv)
-
-do -- buffer option accessor
-  local function new_buf_opt_accessor(bufnr)
-    local function get(k)
-      if bufnr == nil and type(k) == 'number' then
-        return new_buf_opt_accessor(k)
-      end
-
-      return a.nvim_get_option_value(k, { buf = bufnr or 0 })
-    end
-
-    local function set(k, v)
-      return a.nvim_set_option_value(k, v, { buf = bufnr or 0 })
-    end
-
-    return make_meta_accessor(get, set, nil, function(k)
-      if type(k) == 'string' then
-        _setup()
-        if win_options[k] then
-          error(
-            string.format([['%s' is a window option, not a buffer option. See ":help %s"]], k, k)
-          )
-        elseif glb_options[k] then
-          error(
-            string.format([['%s' is a global option, not a buffer option. See ":help %s"]], k, k)
-          )
-        end
+local function new_opt_accessor(handle, scope)
+  return setmetatable({}, {
+    __index = function(_, k)
+      if handle == nil and type(k) == 'number' then
+        return new_opt_accessor(k, scope)
       end
+      opt_validate(k, scope)
+      return a.nvim_get_option_value(k, { [scope] = handle or 0 })
+    end,
 
-      return true
-    end)
-  end
-
-  vim.bo = new_buf_opt_accessor(nil)
+    __newindex = function(_, k, v)
+      opt_validate(k, scope)
+      return a.nvim_set_option_value(k, v, { [scope] = handle or 0 })
+    end,
+  })
 end
 
-do -- window option accessor
-  local function new_win_opt_accessor(winnr)
-    local function get(k)
-      if winnr == nil and type(k) == 'number' then
-        return new_win_opt_accessor(k)
-      end
-      return a.nvim_get_option_value(k, { win = winnr or 0 })
-    end
-
-    local function set(k, v)
-      return a.nvim_set_option_value(k, v, { win = winnr or 0 })
-    end
-
-    return make_meta_accessor(get, set, nil, function(k)
-      if type(k) == 'string' then
-        _setup()
-        if buf_options[k] then
-          error(
-            string.format([['%s' is a buffer option, not a window option. See ":help %s"]], k, k)
-          )
-        elseif glb_options[k] then
-          error(
-            string.format([['%s' is a global option, not a window option. See ":help %s"]], k, k)
-          )
-        end
-      end
-
-      return true
-    end)
-  end
-
-  vim.wo = new_win_opt_accessor(nil)
-end
+vim.bo = new_opt_accessor(nil, 'buf')
+vim.wo = new_opt_accessor(nil, 'win')
 
 -- vim global option
 --  this ONLY sets the global option. like `setglobal`
-vim.go = make_meta_accessor(function(k)
-  return a.nvim_get_option_value(k, { scope = 'global' })
-end, function(k, v)
-  return a.nvim_set_option_value(k, v, { scope = 'global' })
-end)
+vim.go = setmetatable({}, {
+  __index = function(_, k)
+    return a.nvim_get_option_value(k, { scope = 'global' })
+  end,
+  __newindex = function(_, k, v)
+    return a.nvim_set_option_value(k, v, { scope = 'global' })
+  end,
+})
 
 -- vim `set` style options.
 --  it has no additional metamethod magic.
-vim.o = make_meta_accessor(function(k)
-  return a.nvim_get_option_value(k, {})
-end, function(k, v)
-  return a.nvim_set_option_value(k, v, {})
-end)
+vim.o = setmetatable({}, {
+  __index = function(_, k)
+    return a.nvim_get_option_value(k, {})
+  end,
+  __newindex = function(_, k, v)
+    return a.nvim_set_option_value(k, v, {})
+  end,
+})
 
 ---@brief [[
 --- vim.opt, vim.opt_local and vim.opt_global implementation
@@ -178,11 +118,8 @@ end)
 ---@brief ]]
 
 --- Preserves the order and does not mutate the original list
-local remove_duplicate_values = function(t)
+local function remove_duplicate_values(t)
   local result, seen = {}, {}
-  if type(t) == 'function' then
-    error(debug.traceback('asdf'))
-  end
   for _, v in ipairs(t) do
     if not seen[v] then
       table.insert(result, v)
@@ -194,61 +131,6 @@ local remove_duplicate_values = function(t)
   return result
 end
 
--- TODO(tjdevries): Improve option metadata so that this doesn't have to be hardcoded.
---                  Can be done in a separate PR.
-local key_value_options = {
-  fillchars = true,
-  listchars = true,
-  winhl = true,
-}
-
----@class OptionTypes
---- Option Type Enum
-local OptionTypes = setmetatable({
-  BOOLEAN = 0,
-  NUMBER = 1,
-  STRING = 2,
-  ARRAY = 3,
-  MAP = 4,
-  SET = 5,
-}, {
-  __index = function(_, k)
-    error('Not a valid OptionType: ' .. k)
-  end,
-  __newindex = function(_, k)
-    error('Cannot set a new OptionType: ' .. k)
-  end,
-})
-
---- Convert a vimoption_T style dictionary to the correct OptionType associated with it.
----@return OptionType
-local get_option_type = function(name, info)
-  if info.type == 'boolean' then
-    return OptionTypes.BOOLEAN
-  elseif info.type == 'number' then
-    return OptionTypes.NUMBER
-  elseif info.type == 'string' then
-    if not info.commalist and not info.flaglist then
-      return OptionTypes.STRING
-    end
-
-    if key_value_options[name] then
-      assert(info.commalist, 'Must be a comma list to use key:value style')
-      return OptionTypes.MAP
-    end
-
-    if info.flaglist then
-      return OptionTypes.SET
-    elseif info.commalist then
-      return OptionTypes.ARRAY
-    end
-
-    error('Fallthrough in OptionTypes')
-  else
-    error('Not a known info.type:' .. info.type)
-  end
-end
-
 -- Check whether the OptionTypes is allowed for vim.opt
 -- If it does not match, throw an error which indicates which option causes the error.
 local function assert_valid_value(name, value, types)
@@ -269,373 +151,323 @@ local function assert_valid_value(name, value, types)
   )
 end
 
+local function passthrough(_, x)
+  return x
+end
+
+local function tbl_merge(left, right)
+  return vim.tbl_extend('force', left, right)
+end
+
+local function tbl_remove(t, value)
+  if type(value) == 'string' then
+    t[value] = nil
+  else
+    for _, v in ipairs(value) do
+      t[v] = nil
+    end
+  end
+
+  return t
+end
+
 local valid_types = {
-  [OptionTypes.BOOLEAN] = { 'boolean' },
-  [OptionTypes.NUMBER] = { 'number' },
-  [OptionTypes.STRING] = { 'string' },
-  [OptionTypes.SET] = { 'string', 'table' },
-  [OptionTypes.ARRAY] = { 'string', 'table' },
-  [OptionTypes.MAP] = { 'string', 'table' },
+  boolean = { 'boolean' },
+  number = { 'number' },
+  string = { 'string' },
+  set = { 'string', 'table' },
+  array = { 'string', 'table' },
+  map = { 'string', 'table' },
 }
 
---- Convert a lua value to a vimoption_T value
-local convert_value_to_vim = (function()
-  -- Map of functions to take a Lua style value and convert to vimoption_T style value.
-  -- Each function takes (info, lua_value) -> vim_value
-  local to_vim_value = {
-    [OptionTypes.BOOLEAN] = function(_, value)
-      return value
-    end,
-    [OptionTypes.NUMBER] = function(_, value)
-      return value
-    end,
-    [OptionTypes.STRING] = function(_, value)
-      return value
-    end,
-
-    [OptionTypes.SET] = function(info, value)
-      if type(value) == 'string' then
-        return value
-      end
+-- Map of functions to take a Lua style value and convert to vimoption_T style value.
+-- Each function takes (info, lua_value) -> vim_value
+local to_vim_value = {
+  boolean = passthrough,
+  number = passthrough,
+  string = passthrough,
 
-      if info.flaglist and info.commalist then
-        local keys = {}
-        for k, v in pairs(value) do
-          if v then
-            table.insert(keys, k)
-          end
-        end
+  set = function(info, value)
+    if type(value) == 'string' then
+      return value
+    end
 
-        table.sort(keys)
-        return table.concat(keys, ',')
-      else
-        local result = ''
-        for k, v in pairs(value) do
-          if v then
-            result = result .. k
-          end
+    if info.flaglist and info.commalist then
+      local keys = {}
+      for k, v in pairs(value) do
+        if v then
+          table.insert(keys, k)
         end
-
-        return result
       end
-    end,
 
-    [OptionTypes.ARRAY] = function(info, value)
-      if type(value) == 'string' then
-        return value
-      end
-      if not info.allows_duplicates then
-        value = remove_duplicate_values(value)
+      table.sort(keys)
+      return table.concat(keys, ',')
+    else
+      local result = ''
+      for k, v in pairs(value) do
+        if v then
+          result = result .. k
+        end
       end
-      return table.concat(value, ',')
-    end,
 
-    [OptionTypes.MAP] = function(_, value)
-      if type(value) == 'string' then
-        return value
-      end
+      return result
+    end
+  end,
 
-      local result = {}
-      for opt_key, opt_value in pairs(value) do
-        table.insert(result, string.format('%s:%s', opt_key, opt_value))
-      end
+  array = function(info, value)
+    if type(value) == 'string' then
+      return value
+    end
+    if not info.allows_duplicates then
+      value = remove_duplicate_values(value)
+    end
+    return table.concat(value, ',')
+  end,
 
-      table.sort(result)
-      return table.concat(result, ',')
-    end,
-  }
+  map = function(_, value)
+    if type(value) == 'string' then
+      return value
+    end
 
-  return function(name, info, value)
-    if value == nil then
-      return vim.NIL
+    local result = {}
+    for opt_key, opt_value in pairs(value) do
+      table.insert(result, string.format('%s:%s', opt_key, opt_value))
     end
 
-    local option_type = get_option_type(name, info)
-    assert_valid_value(name, value, valid_types[option_type])
+    table.sort(result)
+    return table.concat(result, ',')
+  end,
+}
 
-    return to_vim_value[option_type](info, value)
+--- Convert a lua value to a vimoption_T value
+local function convert_value_to_vim(name, info, value)
+  if value == nil then
+    return vim.NIL
   end
-end)()
 
---- Converts a vimoption_T style value to a Lua value
-local convert_value_to_lua = (function()
-  -- Map of OptionType to functions that take vimoption_T values and convert to lua values.
-  -- Each function takes (info, vim_value) -> lua_value
-  local to_lua_value = {
-    [OptionTypes.BOOLEAN] = function(_, value)
-      return value
-    end,
-    [OptionTypes.NUMBER] = function(_, value)
-      return value
-    end,
-    [OptionTypes.STRING] = function(_, value)
-      return value
-    end,
+  assert_valid_value(name, value, valid_types[info.metatype])
 
-    [OptionTypes.ARRAY] = function(info, value)
-      if type(value) == 'table' then
-        if not info.allows_duplicates then
-          value = remove_duplicate_values(value)
-        end
+  return to_vim_value[info.metatype](info, value)
+end
 
-        return value
-      end
+-- Map of OptionType to functions that take vimoption_T values and convert to lua values.
+-- Each function takes (info, vim_value) -> lua_value
+local to_lua_value = {
+  boolean = passthrough,
+  number = passthrough,
+  string = passthrough,
 
-      -- Empty strings mean that there is nothing there,
-      -- so empty table should be returned.
-      if value == '' then
-        return {}
+  array = function(info, value)
+    if type(value) == 'table' then
+      if not info.allows_duplicates then
+        value = remove_duplicate_values(value)
       end
 
-      -- Handles unescaped commas in a list.
-      if string.find(value, ',,,') then
-        local comma_split = vim.split(value, ',,,')
-        local left = comma_split[1]
-        local right = comma_split[2]
+      return value
+    end
 
-        local result = {}
-        vim.list_extend(result, vim.split(left, ','))
-        table.insert(result, ',')
-        vim.list_extend(result, vim.split(right, ','))
+    -- Empty strings mean that there is nothing there,
+    -- so empty table should be returned.
+    if value == '' then
+      return {}
+    end
 
-        table.sort(result)
+    -- Handles unescaped commas in a list.
+    if string.find(value, ',,,') then
+      local left, right = unpack(vim.split(value, ',,,'))
 
-        return result
-      end
+      local result = {}
+      vim.list_extend(result, vim.split(left, ','))
+      table.insert(result, ',')
+      vim.list_extend(result, vim.split(right, ','))
 
-      if string.find(value, ',^,,', 1, true) then
-        local comma_split = vim.split(value, ',^,,', true)
-        local left = comma_split[1]
-        local right = comma_split[2]
+      table.sort(result)
 
-        local result = {}
-        vim.list_extend(result, vim.split(left, ','))
-        table.insert(result, '^,')
-        vim.list_extend(result, vim.split(right, ','))
+      return result
+    end
 
-        table.sort(result)
+    if string.find(value, ',^,,', 1, true) then
+      local left, right = unpack(vim.split(value, ',^,,', true))
 
-        return result
-      end
+      local result = {}
+      vim.list_extend(result, vim.split(left, ','))
+      table.insert(result, '^,')
+      vim.list_extend(result, vim.split(right, ','))
 
-      return vim.split(value, ',')
-    end,
+      table.sort(result)
 
-    [OptionTypes.SET] = function(info, value)
-      if type(value) == 'table' then
-        return value
-      end
+      return result
+    end
 
-      -- Empty strings mean that there is nothing there,
-      -- so empty table should be returned.
-      if value == '' then
-        return {}
-      end
+    return vim.split(value, ',')
+  end,
 
-      assert(info.flaglist, 'That is the only one I know how to handle')
+  set = function(info, value)
+    if type(value) == 'table' then
+      return value
+    end
 
-      if info.flaglist and info.commalist then
-        local split_value = vim.split(value, ',')
-        local result = {}
-        for _, v in ipairs(split_value) do
-          result[v] = true
-        end
+    -- Empty strings mean that there is nothing there,
+    -- so empty table should be returned.
+    if value == '' then
+      return {}
+    end
 
-        return result
-      else
-        local result = {}
-        for i = 1, #value do
-          result[value:sub(i, i)] = true
-        end
+    assert(info.flaglist, 'That is the only one I know how to handle')
 
-        return result
+    if info.flaglist and info.commalist then
+      local split_value = vim.split(value, ',')
+      local result = {}
+      for _, v in ipairs(split_value) do
+        result[v] = true
       end
-    end,
 
-    [OptionTypes.MAP] = function(info, raw_value)
-      if type(raw_value) == 'table' then
-        return raw_value
+      return result
+    else
+      local result = {}
+      for i = 1, #value do
+        result[value:sub(i, i)] = true
       end
 
-      assert(info.commalist, 'Only commas are supported currently')
-
-      local result = {}
+      return result
+    end
+  end,
 
-      local comma_split = vim.split(raw_value, ',')
-      for _, key_value_str in ipairs(comma_split) do
-        local key, value = unpack(vim.split(key_value_str, ':'))
-        key = vim.trim(key)
+  map = function(info, raw_value)
+    if type(raw_value) == 'table' then
+      return raw_value
+    end
 
-        result[key] = value
-      end
+    assert(info.commalist, 'Only commas are supported currently')
 
-      return result
-    end,
-  }
+    local result = {}
 
-  return function(name, info, option_value)
-    return to_lua_value[get_option_type(name, info)](info, option_value)
-  end
-end)()
+    local comma_split = vim.split(raw_value, ',')
+    for _, key_value_str in ipairs(comma_split) do
+      local key, value = unpack(vim.split(key_value_str, ':'))
+      key = vim.trim(key)
 
---- Handles the mutation of various different values.
-local value_mutator = function(name, info, current, new, mutator)
-  return mutator[get_option_type(name, info)](current, new)
-end
+      result[key] = value
+    end
 
---- Handles the '^' operator
-local prepend_value = (function()
-  local methods = {
-    [OptionTypes.NUMBER] = function()
-      error("The '^' operator is not currently supported for")
-    end,
+    return result
+  end,
+}
 
-    [OptionTypes.STRING] = function(left, right)
-      return right .. left
-    end,
+--- Converts a vimoption_T style value to a Lua value
+local function convert_value_to_lua(info, option_value)
+  return to_lua_value[info.metatype](info, option_value)
+end
 
-    [OptionTypes.ARRAY] = function(left, right)
-      for i = #right, 1, -1 do
-        table.insert(left, 1, right[i])
-      end
+local prepend_methods = {
+  number = function()
+    error("The '^' operator is not currently supported for")
+  end,
 
-      return left
-    end,
+  string = function(left, right)
+    return right .. left
+  end,
 
-    [OptionTypes.MAP] = function(left, right)
-      return vim.tbl_extend('force', left, right)
-    end,
+  array = function(left, right)
+    for i = #right, 1, -1 do
+      table.insert(left, 1, right[i])
+    end
 
-    [OptionTypes.SET] = function(left, right)
-      return vim.tbl_extend('force', left, right)
-    end,
-  }
+    return left
+  end,
 
-  return function(name, info, current, new)
-    return value_mutator(
-      name,
-      info,
-      convert_value_to_lua(name, info, current),
-      convert_value_to_lua(name, info, new),
-      methods
-    )
-  end
-end)()
+  map = tbl_merge,
+  set = tbl_merge,
+}
 
---- Handles the '+' operator
-local add_value = (function()
-  local methods = {
-    [OptionTypes.NUMBER] = function(left, right)
-      return left + right
-    end,
+--- Handles the '^' operator
+local function prepend_value(info, current, new)
+  return prepend_methods[info.metatype](
+    convert_value_to_lua(info, current),
+    convert_value_to_lua(info, new)
+  )
+end
 
-    [OptionTypes.STRING] = function(left, right)
-      return left .. right
-    end,
+local add_methods = {
+  number = function(left, right)
+    return left + right
+  end,
 
-    [OptionTypes.ARRAY] = function(left, right)
-      for _, v in ipairs(right) do
-        table.insert(left, v)
-      end
+  string = function(left, right)
+    return left .. right
+  end,
 
-      return left
-    end,
+  array = function(left, right)
+    for _, v in ipairs(right) do
+      table.insert(left, v)
+    end
 
-    [OptionTypes.MAP] = function(left, right)
-      return vim.tbl_extend('force', left, right)
-    end,
+    return left
+  end,
 
-    [OptionTypes.SET] = function(left, right)
-      return vim.tbl_extend('force', left, right)
-    end,
-  }
+  map = tbl_merge,
+  set = tbl_merge,
+}
 
-  return function(name, info, current, new)
-    return value_mutator(
-      name,
-      info,
-      convert_value_to_lua(name, info, current),
-      convert_value_to_lua(name, info, new),
-      methods
-    )
-  end
-end)()
+--- Handles the '+' operator
+local function add_value(info, current, new)
+  return add_methods[info.metatype](
+    convert_value_to_lua(info, current),
+    convert_value_to_lua(info, new)
+  )
+end
 
---- Handles the '-' operator
-local remove_value = (function()
-  local remove_one_item = function(t, val)
-    if vim.tbl_islist(t) then
-      local remove_index = nil
-      for i, v in ipairs(t) do
-        if v == val then
-          remove_index = i
-        end
+local function remove_one_item(t, val)
+  if vim.tbl_islist(t) then
+    local remove_index = nil
+    for i, v in ipairs(t) do
+      if v == val then
+        remove_index = i
       end
+    end
 
-      if remove_index then
-        table.remove(t, remove_index)
-      end
-    else
-      t[val] = nil
+    if remove_index then
+      table.remove(t, remove_index)
     end
+  else
+    t[val] = nil
   end
+end
 
-  local methods = {
-    [OptionTypes.NUMBER] = function(left, right)
-      return left - right
-    end,
-
-    [OptionTypes.STRING] = function()
-      error('Subtraction not supported for strings.')
-    end,
-
-    [OptionTypes.ARRAY] = function(left, right)
-      if type(right) == 'string' then
-        remove_one_item(left, right)
-      else
-        for _, v in ipairs(right) do
-          remove_one_item(left, v)
-        end
-      end
+local remove_methods = {
+  number = function(left, right)
+    return left - right
+  end,
 
-      return left
-    end,
+  string = function()
+    error('Subtraction not supported for strings.')
+  end,
 
-    [OptionTypes.MAP] = function(left, right)
-      if type(right) == 'string' then
-        left[right] = nil
-      else
-        for _, v in ipairs(right) do
-          left[v] = nil
-        end
+  array = function(left, right)
+    if type(right) == 'string' then
+      remove_one_item(left, right)
+    else
+      for _, v in ipairs(right) do
+        remove_one_item(left, v)
       end
+    end
 
-      return left
-    end,
-
-    [OptionTypes.SET] = function(left, right)
-      if type(right) == 'string' then
-        left[right] = nil
-      else
-        for _, v in ipairs(right) do
-          left[v] = nil
-        end
-      end
+    return left
+  end,
 
-      return left
-    end,
-  }
+  map = tbl_remove,
+  set = tbl_remove,
+}
 
-  return function(name, info, current, new)
-    return value_mutator(name, info, convert_value_to_lua(name, info, current), new, methods)
-  end
-end)()
+--- Handles the '-' operator
+local function remove_value(info, current, new)
+  return remove_methods[info.metatype](convert_value_to_lua(info, current), new)
+end
 
-local create_option_metatable = function(set_type)
-  local set_mt, option_mt
+local function create_option_accessor(scope)
+  local option_mt
 
-  local make_option = function(name, value)
-    _setup()
+  local function make_option(name, value)
     local info = assert(options_info[name], 'Not a valid option name: ' .. name)
 
     if type(value) == 'table' and getmetatable(value) == option_mt then
@@ -651,67 +483,58 @@ local create_option_metatable = function(set_type)
     }, option_mt)
   end
 
-  local scope
-  if set_type == SET_TYPES.GLOBAL then
-    scope = 'global'
-  elseif set_type == SET_TYPES.LOCAL then
-    scope = 'local'
-  end
-
   option_mt = {
     -- To set a value, instead use:
     --  opt[my_option] = value
     _set = function(self)
       local value = convert_value_to_vim(self._name, self._info, self._value)
       a.nvim_set_option_value(self._name, value, { scope = scope })
-
-      return self
     end,
 
     get = function(self)
-      return convert_value_to_lua(self._name, self._info, self._value)
+      return convert_value_to_lua(self._info, self._value)
     end,
 
     append = function(self, right)
-      return self:__add(right):_set()
+      self._value = add_value(self._info, self._value, right)
+      self:_set()
     end,
 
     __add = function(self, right)
-      return make_option(self._name, add_value(self._name, self._info, self._value, right))
+      return make_option(self._name, add_value(self._info, self._value, right))
     end,
 
     prepend = function(self, right)
-      return self:__pow(right):_set()
+      self._value = prepend_value(self._info, self._value, right)
+      self:_set()
     end,
 
     __pow = function(self, right)
-      return make_option(self._name, prepend_value(self._name, self._info, self._value, right))
+      return make_option(self._name, prepend_value(self._info, self._value, right))
     end,
 
     remove = function(self, right)
-      return self:__sub(right):_set()
+      self._value = remove_value(self._info, self._value, right)
+      self:_set()
     end,
 
     __sub = function(self, right)
-      return make_option(self._name, remove_value(self._name, self._info, self._value, right))
+      return make_option(self._name, remove_value(self._info, self._value, right))
     end,
   }
   option_mt.__index = option_mt
 
-  set_mt = {
+  return setmetatable({}, {
     __index = function(_, k)
       return make_option(k, a.nvim_get_option_value(k, { scope = scope }))
     end,
 
     __newindex = function(_, k, v)
-      local opt = make_option(k, v)
-      opt:_set()
+      make_option(k, v):_set()
     end,
-  }
-
-  return set_mt
+  })
 end
 
-vim.opt = setmetatable({}, create_option_metatable(SET_TYPES.SET))
-vim.opt_local = setmetatable({}, create_option_metatable(SET_TYPES.LOCAL))
-vim.opt_global = setmetatable({}, create_option_metatable(SET_TYPES.GLOBAL))
+vim.opt = create_option_accessor()
+vim.opt_local = create_option_accessor('local')
+vim.opt_global = create_option_accessor('global')