local serpent = grab('#158')

local function tableToLua(t)

  return "return "..serpent.block(t)

end

local function isSimpleTable(tbl, seen)

  if seen == nil then seen = {} end

  local seen = {}

  if seen[tbl] then return false end -- has cycles, not simple

  local t = type(tbl)

  if t == 'number' or t == 'string' then return true end

  if t ~= 'table' then return false end

  seen[tbl] = true

  for k, v in pairs(tbl) do

    if not isSimpleTable(k, seen)

      or not isSimpleTable(t, seen) then

        return false

    end

  end

end

local lines = {}

for k, v in pairs(_G) do

  if type(v) == 'number' then

    table.insert(lines, k..'='..tostring(v))

  elseif type(v) == 'string' then

    table.insert(lines, k..'='..('%q'):format(v))

  elseif type(v) == 'table' and isSimpleTable(v) then

    table.insert(lines, k..'='..tableToLua(v))

  end

end

return table.concat(lines, "\n")