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Rafael,
Your code doesn't work either. But the following code works, although more clumsy than what I first tried: 

   while true do
       str = S:Next()
       if str == nil then break end
       -- stuff
   end
So do you have any idea why I cannot use the more compact syntax that I first trieed? 

Michael
----- Original Message ----- From: "Rafael de Menezes" <soscpd@terra.com.br> 
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Monday, January 08, 2007 1:47 PM
Subject: Re: what's wrong with this loop syntax?



Just while (str) do
if str = S:Next() then
end
end
doesnt work? Its not the beeest est code, but i dont have more sources....
----- Original Message ----- From: "Michael Newberry" <mnewberry@mirametrics.com> 
To: "Lua list" <lua@bazar2.conectiva.com.br>
Sent: Monday, January 08, 2007 6:33 PM
Subject: what's wrong with this loop syntax?



Pardon me for asking a simple question, but why can't I use this syntax?

   while (str = S:Next()) ~= nil do

or this syntax:

   while (str = S:Next()) and str ~= nil do

where S exists and S:Next() returns a string or nil.

I get this message:    `)' expected near `='

Thanks,

Michael