Difference between revisions of "Geterror"
From OpenEUO
m (→Description) |
m (→Usage Example) |
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local sl = dofile(getinstalldir()..'/lib/simplelib.lua') | local sl = dofile(getinstalldir()..'/lib/simplelib.lua') | ||
| + | sl.slredirect('in') | ||
local f = function() local a = {} a = a + 1 end | local f = function() local a = {} a = a + 1 end | ||
local h = function(eref) | local h = function(eref) | ||
| − | local | + | local le = eref |
| − | + | if type(le) == 'string' then | |
| + | error(le,1) | ||
| + | end | ||
end | end | ||
| − | sl.try(f,h) | + | local c,d = sl.try(f,h) |
| + | print(tostring(c)) | ||
| + | print(tostring(d)) | ||
| + | print(tostring(sl.geterror(d)._errmsg)) | ||
| + | |||
| + | --> nil | ||
| + | 1 | ||
| + | a try() handler function raised an unknown exception. | ||
| + | At: ...\scripts\test00.lua:11. | ||
| + | Exception text: ...\scripts\test00.lua:7: attempt to perform arithmetic on local 'a' (a table value). | ||
== Description == | == Description == | ||
| Line 30: | Line 42: | ||
== 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 == | ||
| + | |||
| + | * [http://www.easyuo.com/openeuo/wiki/index.php/Simplelib simplelib] | ||
* [[ERR]] | * [[ERR]] | ||
Latest revision as of 17:18, 2 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')
sl.slredirect('in')
local f = function() local a = {} a = a + 1 end
local h = function(eref)
local le = eref
if type(le) == 'string' then
error(le,1)
end
end
local c,d = sl.try(f,h)
print(tostring(c))
print(tostring(d))
print(tostring(sl.geterror(d)._errmsg))
--> nil
1
a try() handler function raised an unknown exception.
At: ...\scripts\test00.lua:11.
Exception text: ...\scripts\test00.lua:7: attempt to perform arithmetic on local 'a' (a table value).
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.
