| Re: how to determine current position in a program?? [message #58135] |
Tue, 22 January 2008 10:04 |
Foldy Lajos
Messages: 268
Registered: October 2001
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Senior Member |
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On Tue, 22 Jan 2008, Mark wrote:
> Hello.
>
> I was wondering if anyone would offhand have any idea of how to go
> about determining which line number a program is at at a certain time.
> That is to say, I would like a program to print a message something
> like "at line 1234", where 1234 is the actual line number in the code.
>
> For example, I'd originally have:
>
> pro junk,xxx
> print,'1'
> print,'2'
> print,'you are now at this line in the code ',3
> return
> end
>
> Of course, I'd want to modify the code endless times to get something
> like:
>
>
> pro junk,xxx
> print,'1'
> print,'2'
> x=0. ;line 3
> x=x+1. ;line 4
> print,'you are now at this line in the code ',some_function()
> return
> end
>
> That is to say, I'd like have some_function() return the number 5,
> since it's being called at line 5 in the code. I don't want to
> constantly have to be changing my print statements, in other words.
>
> When programs crash you get an output to the effect that things came
> to a halt at such and such a line in one unit or another, so it seems
> like IDL might have the capability of knowing which line of a code is
> being executed at any given time.... Does anyone know if this can be
> done without too much pain and anguish......
>
> Thanks all,
>
> Mark
>
function some_function
traceback=scope_traceback(/struct)
return, traceback[n_elements(traceback)-2].line
end
regards,
lajos
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