[asterisk-users] How to write custom functions in AEL2 ,

[Watkins, Bradley]

________________________________

	From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Olivier
	Sent: Monday, May 11, 2009 3:30 AM
	To: Asterisk Users Mailing List - Non-Commercial Discussion
	Subject: [asterisk-users] How to write custom functions in AEL2
,
	
	
	Hi,
	
	I'm using asterisk 1.6.1 and AEL2.
	I'm trying to find the best way to write my own custom functions
?
	
	
	At the moment, I'm using this pattern (extensions.ael) :
	
	context foo {
	123 => {
	    &myfunc(123456);
	    NoOp(${GOSUB_RETVAL});
	};
	
	macro myfunc (arg) {
	    Return (${arg});
	}
	
	1. First, I keep getting warnings like
	Warning: file /etc/asterisk/extensions.ael, line 446-446:
application call to Return affects flow of control, and needs to be
re-written using AEL if, while, goto, etc. keywords instead!
	and I would like to get rid of them.

Unfortunately, AEL does not support using return with a value at the
moment.  There is a patch on Reviewboard that does this, as well as
*simple* direct assignment from an AEL macro return:
http://reviewboard.digium.com/r/114/


	
	2. Secondly, I would like not to use GOSUB_RETVAL  and call a
custom function just like I'm calling other functions with statements
like :
	123 => {
	     NoOp(TOLOWER(fOo BaR));
	     NoOp(myfunc(123456));
	};
	
	What would you advise me to do ?

That requires rather a lot more work than the above patch, but if you
use the direct assignment at least you needn't worry about GOSUB_RETVAL.


Regards,
- Brad