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How to return from a SKILL procedure

LakshmanQual

Hi all,

I am writing a SKILL script as mentioned below for some utility, Meanwhile i got some issues. Could you please give me the proper commands to use at the required place?

I want to exit/return from procedure. I tried to use 'return()', ipcCloseProcess(), ipckillAllProcesses(), ipcStopProcess(). But they are throwing evaluation errors. Could you please let me know how to use process ending functions and using the return values from dialog boxes to run another procedure..

procedure(proc_main()

;some definitions and  functions here

proc2(a)

proc3(b)

)

procedure(proc2(a)

a=b+c

x=y+z

if (x then

proc3(b)

else

-- I want to exit the main procedure with a dialogue box

hidisplayAppDBox(?name 'ERROR

                             ?dboxText "Error message")

;;;return command or some other dialog box for further process here.

) ; end if

) ; end proc2

Parents
  • skillUser

    Hi,

    The 'return' command must be used with a 'prog' block, and you would only use the IPC functions that you mention if you actually used another IPC command to start a process (an external process that can communicate with Virtuoso with inter-process communication, IPC).

    You don't need to explicitly return anything from an 'if' or procedure block (plus others, like cond, let ...) - the last thing done within such a block/group will be the return value.

    I'm not really clear on what you are wanting to do, proc_main calls proc2 and proc3, when proc2 completes it returns the value of the last command within the proc2 block, which currently is either the return value of proc3() or hiDisplayAppDBox() (side note your if logic is 'iffy', x appears to be a numeric value which will always be true because it is non-nil, you probably want to test the value against some bounds?). The procedure proc2 most likely won't return until after the dialog box is dismissed since the default mode for dialog boxes is 'modal - you can change this with ?dialogStyle 'modeless if you want it to return a value right away.

    Hopefully this helps, but if not provide more details so that we might help further.

    Lawrence.

  • LakshmanQual
    in reply to skillUser

    Hi Lawrence,

    I was little confused while writing the code as i am still learning SKILL. I want to execute commands based on the callback value of hiDisplayAppDBox(). 

    If call back return value is 'ok' okay, then i want to execute proc3(b), if callback return value is 'cancel' i want exit the proc2(a) by not executing the next commands after if condition..

  • Andrew Beckett
    in reply to LakshmanQual

    You'd typically either do all the further processing from the callback (i.e. what you specify with ?callback for hiDisplayAppDBox) - so selectively calling proc3(b) within that callback, or rather than using a callback just use the return value of hiDisplayAppDBox(). So something like:

    when(hiDisplayAppDBox(...)
      proc3(b)
    )

    It's quite hard (as Lawrence pointed out) to give you full details because it's pretty unclear as to what you're trying to do as your examples are a bit abstract.

    Regards,

    Andrew.

Reply
  • Andrew Beckett
    in reply to LakshmanQual

    You'd typically either do all the further processing from the callback (i.e. what you specify with ?callback for hiDisplayAppDBox) - so selectively calling proc3(b) within that callback, or rather than using a callback just use the return value of hiDisplayAppDBox(). So something like:

    when(hiDisplayAppDBox(...)
      proc3(b)
    )

    It's quite hard (as Lawrence pointed out) to give you full details because it's pretty unclear as to what you're trying to do as your examples are a bit abstract.

    Regards,

    Andrew.

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