local mt = {} function mt.__index(t, k) return function(frame) local data = mw.loadData(k) local i = 1 for _,v in ipairs(frame.args) do local ty = type(data) if ty ~= 'table' then local args = {} for j = 1, i - 1 do args[j] = frame.args[j] end if frame.args.softfail then return '' else error('Tried to read index "' .. v .. '" of mw.loadData("' .. k .. '").' .. table.concat(args, '.') .. ', which is a ' .. ty) end end data = data[v] i = i + 1 end return data end end return setmetatable({}, mt)