I would like to customize the error message, but it's just a fad. It would be an unnecessary work.

why change my code kibo? $try() is the error handler, all you have to do is check if it != $Null

$try() - Tries to execute and returns the error message if errors. Otherwise it returns $Null

alias try $1- | if ($error) reseterror | return $v1

Example:

alias try-example {
  echo 12 -a Trying: "/echo -a test" Result: $try(echo -a Test)
  echo 04 -a Trying: "/echo -a" Result: $try(echo -a)
}

for example i can make a error handler.

alias handle::error {
;error echo debug
if (echo isin $1-) { echo -s 4 echo command error | halt }
;error window debug
if (window isin $1-) { echo -s 4 window command error | halt }
;etc etc
}

alias test_123 {
; if (!$1) { echo -s command does not exist | halt }
$1-
:error
if ($error) {
reseterror
handle::error $v1
}
}

What module is that? mIRC already has the commands and identifier :error , $error and reseterror to handle the error messages generated by a faulty code.

Srjeject I have an idea about a module for error handling in mirc. I sketched something use your technique for handling errors.

Thanks kibo. :)

Jethro, b/c $error is evaluated and stored in $v1 before /reseterror is called

Sreject your code is beautiful and elegant. compliments

If you reset the error first, how do you return $v1? The /reseterror commands sort of halts or suppresses it.

You could use it as an identifer so to speak, this way if there is an error, the calling script will be able to handle it:

alias for {
  if ($0 != 2 || $1. !isnum 0- || $2 == $null) return * /For: Invalid parameters

  var %n = $1
  while (%n) {
    if ($try($2-)) return $v1 
    dec %n
  }

}
alias try $1- | :error | if ($error) reseterror | return $v1

;---------------;
;--- Example ---;
;---------------;
alias for:exp {

  ;These two will throw errors!
  if ($for(a,)) echo -a Error: $v1
  if ($for(1,!write)) echo -a Error: $v1

  ;if $for(,) returns null, it succeeded
  if (!$for(2,echo -a hey!)) echo -a Success!
}

Edited to add some more error checking & to clean up the code

I prefer to use a Private Alias so i can a more structured code, even if your code is more optimized, because it does not call an Alias so is more fast.

If you want an error message then you should use this:

alias for {
  var %n = $1
  if (%n isnum) {
    while (%n != 0) {
      $2-
      dec %n
    }
  }
  else {
    echo 4 -as Error in For Loop
  }
}

ok I'll use your solution . I now regard a "like" :P

Your solution is far from compact and efficient.

I preferred to use a less compact solution

You might want to check if $1 is a number:

while (%n isnum && %n != 0) {

Thank you. I have to improve it with a check on the $1 parameter.

nice

Tnx . i'have edit it.

You can use /dec %n to decrease %n instead of using $calc(%n -1)