Re: [asterisk-users] AEL question: testing channel variables
http://www.voip-info.org/wiki-Asterisk+variables
http://www.voip-info.org/wiki-Asterisk+Dialplan+Globals
Beware with the variable scope, if its scope is local the values can
be lost, so declare the variable as global when its value must persist
between calls.
[globals]
FOOBAR => NO
[some_context]
if (${FOOBAR}=YES) {
...
}
On Sat, Jan 10, 2009 at 2:53 PM, Philipp Kempgen
wrote:
> Klaus Darilion schrieb:
>> I use the following condition:
>>
>> if (${FOOBAR}=YES) {
>>...
>> }
>>
>> The problem is, that if FOOBAR is not defined at all Asterisk generates
>> a warning:
>>
>> WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
>> error: syntax error, unexpected '=', expecting $end; Input:
>> =YES
>>
>>
>> Of course I could use the following code, but this bloats up the code:
>>
>>
>> if (${EXISTS(${FOOBAR})}) {
>>if (${FOOBAR}=YES) {
>> ...
>>}
>> }
>>
>>
>> Is there another syntax to have nice looking code but avoid the warning?
>
> if ("${FOOBAR}"="YES") {
> ...
> }
>
> or
>
> if (x${FOOBAR}=xYES) {
> ...
> }
>
>
> Philipp Kempgen
>
> --
> AMOOCON 2009, May 4-5, Rostock / Germany -> http://www.amoocon.de
> Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de
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>
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Re: [asterisk-users] AEL question: testing channel variables
Klaus Darilion schrieb:
> I use the following condition:
>
> if (${FOOBAR}=YES) {
>...
> }
>
> The problem is, that if FOOBAR is not defined at all Asterisk generates
> a warning:
>
> WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
> error: syntax error, unexpected '=', expecting $end; Input:
> =YES
>
>
> Of course I could use the following code, but this bloats up the code:
>
>
> if (${EXISTS(${FOOBAR})}) {
>if (${FOOBAR}=YES) {
> ...
>}
> }
>
>
> Is there another syntax to have nice looking code but avoid the warning?
if ("${FOOBAR}"="YES") {
...
}
or
if (x${FOOBAR}=xYES) {
...
}
Philipp Kempgen
--
AMOOCON 2009, May 4-5, Rostock / Germany -> http://www.amoocon.de
Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de
AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied -> http://www.amooma.de
Geschäftsführer: Stefan Wintermeyer, Handelsregister: Neuwied B14998
--
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Re: [asterisk-users] AEL question: testing channel variables
Initialize FOOBAR to some know value (ie NO) and change it when you need
to. Then it will always be defined.
Klaus Darilion wrote:
> Hi!
>
> I use the following condition:
>
> if (${FOOBAR}=YES) {
>...
> }
>
> The problem is, that if FOOBAR is not defined at all Asterisk generates
> a warning:
>
> WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
> error: syntax error, unexpected '=', expecting $end; Input:
> =YES
>
>
> Of course I could use the following code, but this bloats up the code:
>
>
> if (${EXISTS(${FOOBAR})}) {
>if (${FOOBAR}=YES) {
> ...
>}
> }
>
>
> Is there another syntax to have nice looking code but avoid the warning?
>
> thanks
> klaus
>
> ___
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>
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Re: [asterisk-users] AEL question: testing channel variables
On Thu, 2009-01-08 at 19:24 +0100, Klaus Darilion wrote:
> Hi!
>
> I use the following condition:
>
> if (${FOOBAR}=YES) {
>...
> }
>
> The problem is, that if FOOBAR is not defined at all Asterisk generates
> a warning:
>
> WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
> error: syntax error, unexpected '=', expecting $end; Input:
> =YES
>
>
> Of course I could use the following code, but this bloats up the code:
>
>
> if (${EXISTS(${FOOBAR})}) {
>if (${FOOBAR}=YES) {
> ...
>}
> }
>
>
> Is there another syntax to have nice looking code but avoid the warning?
Klaus--
The simplest I can think of is:
if ("${FOOBAR}"="YES") {
...
}
adding the quotes just makes it so if ${FOOBAR} evaluates to nothing,
then it will still end being a token, and you avoid the syntax error.
You have to keep in mind that by the time the $[ ... ] exprs are evaluated,
all ${..} constructs have been recursively evaluated away.
the wiki is a good reference for AEL2...
(http://voip-info.org/wiki/view/Asterisk+AEL2
and there is a page of example snippets.
murf
>
> thanks
> klaus
--
Steve Murphy
Digium
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Re: [asterisk-users] AEL question: testing channel variables
Klaus Darilion wrote:
> Hi!
>
> I use the following condition:
>
> if (${FOOBAR}=YES) {
>...
> }
>
> The problem is, that if FOOBAR is not defined at all Asterisk generates
> a warning:
>
> WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
> error: syntax error, unexpected '=', expecting $end; Input:
> =YES
>
>
> Of course I could use the following code, but this bloats up the code:
>
>
> if (${EXISTS(${FOOBAR})}) {
>if (${FOOBAR}=YES) {
> ...
>}
> }
>
>
> Is there another syntax to have nice looking code but avoid the warning?
>
How about
if ("${FOOBAR}"="YES") {
Julian
> thanks
> klaus
>
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>
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> To UNSUBSCRIBE or update options visit:
>http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
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[asterisk-users] AEL question: testing channel variables
Hi!
I use the following condition:
if (${FOOBAR}=YES) {
...
}
The problem is, that if FOOBAR is not defined at all Asterisk generates
a warning:
WARNING[11982]: ast_expr2.fl:407 ast_yyerror: ast_yyerror(): syntax
error: syntax error, unexpected '=', expecting $end; Input:
=YES
Of course I could use the following code, but this bloats up the code:
if (${EXISTS(${FOOBAR})}) {
if (${FOOBAR}=YES) {
...
}
}
Is there another syntax to have nice looking code but avoid the warning?
thanks
klaus
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