is complete

lua/luadev/complete.lua

@@ -0,0 +1,33 @@
+local function complete()
+  local line = vim.api.nvim_get_current_line()
+  local endcol = vim.api.nvim_win_get_cursor(0)[2]
+  local text = string.sub(line,1,endcol)
+  local x,y,z = string.match(text,"([%.%w%[%]_]-)([:%.%[])([%w_]-)$")
+  --require'luadev'.print(x,y,z)
+  local status, obj
+  if x ~= nil then
+    status, obj = pcall(loadstring("return "..x))
+  else
+    status, obj = true, _G
+    y, z = ".", string.match(text,"([%w_]-)$")
+  end
+  --require'luadev'.print(status,obj,y,z)
+  local entries = {}
+  -- TODO: metatable of userdata? (and for tables..)
+  if (not status) or type(obj) ~= 'table' then
+    return
+  end
+  for k,_ in pairs(obj) do
+    if type(k) == "string" and k:sub(1,string.len(z)) == z then
+      table.insert(entries,k)
+    end
+  end
+  local start = endcol - string.len(z) + 1
+  table.sort(entries)
+  --require'luadev'.print(vim.inspect(entries))
+  -- BUG/REGRESSION?? complete() doesn't respect 'completeopt'
+  vim.api.nvim_call_function("complete", {start, entries})
+end
+-- TODO: luadev should add a command to source a file like this:
+--package.loaded['luadev.complete']=complete
+return complete

plugin/luadev.vim

@@ -3,6 +3,7 @@ command! Luadev lua require'luadev'.start()
 noremap <Plug>(Luadev-RunLine) <Cmd>lua require'luadev'.exec(vim.api.nvim_get_current_line())<cr>
 vnoremap <Plug>(Luadev-Run) :<c-u>call luaeval("require'luadev'.exec(_A)", <SID>get_visual_selection())<cr>
 noremap <Plug>(Luadev-RunWord) :<c-u>call luaeval("require'luadev'.exec(_A)", <SID>get_current_word())<cr>
+inoremap <Plug>(Luadev-Complete) <Cmd>lua require'luadev.complete'()<cr><c-p>
 
 " thanks to @xolox on stackoverflow
 function! s:get_visual_selection()