View source for File.readnext

== Calling Pattern ==
Call
 local f = sl.file(a,b)

 local r = f.readnext()

Results
 r is of type EOF,nil,null,boolean,number,string, or table

== Example Usage ==

h = sl.file(getinstalldir()..'scripts/testread.dat', 'read')
local val = true
while val ~= nil and val ~= 'EOF' do
  val = h.readnext()
  if val == sl.null then val = 'null' end
  if val == sl.EOF then val = 'EOF' end
  print('val : '..tostring(val))
end

 --> val : 38.333412345
     val : null
     val : null
     val : null
     val : 30
     val : TEST_
     val : true
     val : false
     val : null
     val : true
     val : 3.141622e-030
     val : table: 0x011da540
     val : EOF

== Description ==

Readnext reads the next value stored in the associated file.  If there are no more values (readnext has reached the end of the file), then readnext returns [[EOF]]. Nils written to a file are stored and returned as [[null]].

== Upon Error ==

Readnext returns [[nil]] if there is a problem reading a value.

== See Also ==

* [http://www.easyuo.com/openeuo/wiki/index.php/Simplelib simplelib]

* [[EOF]]

* [[file.readall]]

* [[file.readnext]]

* [[file.reopen]]

* [[null]]