Difference between revisions of "Geterror"

From OpenEUO
Jump to: navigation, search
m (Description)
m (Upon Error)
Line 30: Line 30:
 
== Upon Error ==
 
== Upon Error ==
  
If geterror receives no arguments, or a non-numeric argument, or the argument is out of range, then it returns a single nil value.
+
If geterror receives no arguments, or a non-numeric argument, or the argument is out of range, then it returns a single [[nil]] value.
  
 
== See Also ==
 
== See Also ==

Revision as of 23:35, 1 November 2010

Calling Convention

Call

local e = sl.geterror(eref)

Args

eref is a number

Results

e is a table with key:val pair _type:'table:exception' defined

Usage Example

local sl = dofile(getinstalldir()..'/lib/simplelib.lua')
local f = function() local a  = {} a = a + 1 end
local h = function(eref)
  local e = geterror(eref)
  print(e._errmsg)
end
sl.try(f,h)

Description

geterror returns the recorded error table of a detected error when given a valid numeric error reference, eref. An error table has the following fields:

field     : description
_type       'table:exception'
_errid      Same as the argument provided to geterror. Numeric.
_errname    Name provided for the error, or 'SL unknown error'.
_errmsg     String of descriptive text associated with the error.
_probe      A table of stack information tables for internal use.

Upon Error

If geterror receives no arguments, or a non-numeric argument, or the argument is out of range, then it returns a single nil value.

See Also