[asterisk-users] parsing issue

[Barry Miller]

On Wed, May 02, 2012 at 01:48:04PM -0400, CDR wrote:
> I get an error when I execute this code
> exten => rejected,n,Hangup($[-1*${Z}])
> 
> May  2 13:42:09] WARNING[23128]: ast_expr2.fl:468 ast_yyerror:
> ast_yyerror():  syntax error: syntax error, unexpected $end, expecting
> '-' or '!' or '(' or '<token>'; Input:
> -1*
> 
> The variable "Z" has a  negative number, which is the code that I need
> to use in the hangup.
> Any idea how can I do this? There is no ABS() function in Asterisk. I
> already filed a request for it but it turns up that it will cost me
> money. How can I remove the sign from a number?

If you're sure Z is non-null and negative, then
  exten => rejected,n,Hangup($[-(${Z})])

-- 
Barry