[asterisk-users] Correct syntax for IF()?

[Turbo Fredriksson]

Quoting Vincent <vincent.delporte at bigfoot.com>:

> exten => h,n,Set(WAV_FILE=${IF($[ ${STAT(e,/tmp/${CALLTIME}.wav)} ]?${CALLTIME}.wav)})
                                   ^                               ^                 ^
To start, to many spaces... And a missing end parenthesis... And a end parenthesis in
the wrong place

  exten => h,n,Set(WAV_FILE=${IF($[${STAT(e,/tmp/${CALLTIME}.wav)}])?${CALLTIME}.wav})
                                                                   ^
> exten => h,n,Set(WAV_FILE=${IF($[STAT(e,/tmp/${CALLTIME}.wav)]?${CALLTIME}.wav:"")})

You're missing the end parentheses of the IF.

  exten => h,n,Set(WAV_FILE=${IF($[STAT(e,/tmp/${CALLTIME}.wav)])?${CALLTIME}.wav:"")})


I didn't check your rest examples, but I will asume that they suffer the same problem.
You should code a little lisp. That will teach you to keep your parenthesis in order :)


What you do is you always write the beginning _and_ the end at once. Never try to do them
'later'...

Example:

  1. Set()
  2. Set(WAV_FILE=${})
  3. Set(WAV_FILE=${IF()})
  4. Set(WAV_FILE=${IF($[]?:)})

etc. Do you see it?


It DO help to have a good editor. I'm not going to start a war about this, but emacs
rocks :).