________________________________

        From: asterisk-users-boun...@lists.digium.com
[mailto:asterisk-users-boun...@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

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