test/save.lua

   1 -- dump global environment
   2
   3 function savevar (n,v)
   4  if v == nil then return end
   5  if type(v)=="userdata" or type(v)=="function" then return end
   6  -- if type(v)=="userdata" or type(v)=="function" then write("\t-- ") end
   7  write(n,"=")
   8  if type(v) == "string" then write(format("%q",v))
   9  elseif type(v) == "table" then
  10    if v.__visited__ ~= nil then
  11      write(v.__visited__)
  12    else
  13     write("{}\n")
  14     v.__visited__ = n
  15     local r,f
  16     r,f = next(v,nil)
  17     while r ~= nil do
  18       if r ~= "__visited__" then
  19         if type(r) == 'string' then
  20           savevar(n.."."..r,f)
  21         else
  22           savevar(n.."["..r.."]",f)
  23         end
  24       end
  25       r,f = next(v,r)
  26     end
  27    end
  28  else write(tostring(v)) end
  29  write("\n")
  30 end
  31
  32 function save ()
  33  write("\n-- global environment\n")
  34  local n,v = nextvar(nil)
  35   while n ~= nil do
  36     savevar(n,v)
  37     n,v = nextvar(n)
  38   end
  39 end
  40
  41 -- ow some examples
  42
  43 a = 3
  44 x = {a = 4, b = "name", l={4,5,67}}
  45
  46 b = {t=5}
  47 x.next = b
  48
  49 save()