asterisk users - Jun 2006 - Error in config sample for GoToIf?

My teeth are on edge after this one.  A couple of perfectly good hours 
of my life, and I still don't know what's going on. . . .

The extensions.conf.sample that comes with the current SVN trunk has 
this line, in an example that shows how to use ChanIsAvail:

exten => s,n,GoToIf([${AVAILSTATUS} = "1"]?autoanswer:fail)

I couldn't get this to work unless I surrounded the first part of the 
test with quotes, too, like this:

exten => s,n,GoToIf(["${AVAILSTATUS}" =
"1"]?autoanswer:fail)

Leaving aside the completely separate madness of trying to determine 
just what values mean what for the variable $AVAILSTATUS (which I would 
be glad to receive a pointer to), is it indeed the case that the example 
in the distribution is in error, or is there some other subtle rule that 
is causing the behavior of this line to be correct with the extra quotes 
but incorrect otherwise?

Thanks.

B.

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Brian Capouch wrote:
> 
> exten => s,n,GoToIf([${AVAILSTATUS} = "1"]?autoanswer:fail)
> 
> I couldn't get this to work unless I surrounded the first part of the 
> test with quotes, too, like this:
> 
> exten => s,n,GoToIf(["${AVAILSTATUS}" =
"1"]?autoanswer:fail)
> 
Ooops.

Actually, I mis-pasted one of my intermediate attempts there that didn't 
work.  So sorry.  My excuse is that I've gone daft.  This is the line 
that actually seemed to branch correctly (although not with a "1" in
the
test, but that's part of another question :-))

exten => s,n,GoToIf($["${AVAILSTATUS}" =
"1"]?autoanswer:fail)

Note the extra $ ahead of the leftmost brace. . .

There are many permutations of braces, dollar signs, and quote marks in 
the various examples on the Wiki, btw, many of which note that other 
examples are incorrect. . .

B.

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