Re: Iterating over tables

[Eva Schmidt <es@...>]

Hi Chris,

I think there are several problems for you to solve:

1.) It doesn't matter if you read in a Lua table in C or in Lua - the most 
important thing is that it's really a Lua table. So if you read it in with Lua, 
I think it will be a string. You can use the io functions
	io.open
	io.read
	...
for reading in the file. If you've done so, the file content will be in your Lua 
script as a string.


2.) The string must be parsed then to create the tables and subtables in Lua. 
Once you have tables, you can parse them :-)

My suggestion would be to create a function named test () (according to your 
test file). The parameter to this function should be a table:

function test (tbl)
   if tbl ~= nil then
      print ("Table on board")
      r_print(tbl)
      return tbl
   end
   print ("Sad but true ;-(")
end

The function r_print () is just a recursive function for printing subtables:

function r_print (tbl)
   for i,v in pairs (tbl) do
      print (i,v)
      if type(v) == "table" then
	 r_print (v)
      end
   end
end

Use the loadstring () function for creating a function from your read in string 
and use pcall () for calling the string. It will call your test function, the 
table within can be accessed as function parameter :-):

s, error = loadstring ("test {admin = { x = 2, y = 3}}")
pcall (s)

As you can see here, there should be no "=" after test, because it shall be 
interpreted as function call. But you can also read in the string and prepend 
your functionname :

input = "test = {{admin = { x = 2, y = 3}}}"
input = "myfunction {" .. input .. "}"


Maybe that helps a little bit :-)

Regards,
Eva