[Asterisk-Users] Bug in my head or bug in the code?

[John Todd]

Updated: http://bugs.digium.com/bug_view_page.php?bug_id=0000231

Looks like a bug, then.  I'll add this text to the bugnote.  The 
${FOO:-1:1} seems to always return theh "right" reply (the last 
character of the string) but the = operator for some reason doesn't 
like "*" (ironic, since it's an Asterisk.  :-)

exten => 2213,1,SetVar(FOO=123**)       
exten => 2213,2,SetVar(CHECK=${FOO:-1:1})

     -- Executing SetVar("SIP/2203-2a83", "FOO=123**") in new stack
     -- Executing SetVar("SIP/2203-2a83", "CHECK=*") in new stack

JT

>What does this step show on the CLI ?
>exten => 1,1,SetVar(FOO=123**)
>exten => 1,2,SetVar(CHECK=${FOO:-1:1})
>
>? If you're going to see CHECK=* then there is a bug in = operator ...
>
>Martin
>
>On Fri, 5 Sep 2003, John Todd wrote:
>
>>  I am having Yet Another Regular Expression problem, but this one
>>  might not be my fault, or at least it might not be obviously my
>>  fault.  :-)
>>
>>
>>  exten => 2212,1,SetVar(FOO=123456**)
>>  exten => 2212,2,SetVar(BAR=$[${FOO:-1:1} = *])
>>
>>  This script continues with a value of 0 in BAR.
>>
>>  Similarly, none of the following changes made a difference in that
>>  result, which is expected since the * is not listed in
>>  README.variables as a character that must be escaped:
>>
>>  exten => 2212,2,SetVar(BAR=$[${FOO:-1:1} = "*"])
>>  exten => 2212,2,SetVar(BAR=$[${FOO:-1:1} = "\*"])
>>  exten => 2212,2,SetVar(BAR=$[${FOO:-1:1} = \*])
>>
>>  I have also tried setting the variable ${BAZ}=*  and then using that
>>  in my comparison, with the same unexpected results.
>>
>>  Oddly enough, this almost-identical example below has different, but
>>  "normal", results: BAR=1
>>
>>  exten => 2212,1,SetVar(FOO=123456##)
>>  exten => 2212,2,SetVar(BAR=$[${FOO:-1:1} = #])
>>
>>
>>  What gives?  Am I colliding with a problem that is the result of the
>>  "*" character being used in expr evaluations and somehow not being
>>  handled correctly, or am I simply not implementing the syntax
>>  correctly?
>>
>>  JT
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>>
>
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