Re: exit not working as stated in help

[Ethan M. <merritt@u.washington.edu>]

On Wednesday, February 08, 2012 10:32:28 am pl...@pi... wrote:
> HI,
> 
> unless I'm reading it wrongly or it simply unclear , it seems that exit 
> is not doing what it says on the box.

Known bug, although I don't see a tracker item for it.
Feel free to add one.
As I recall, it behaves unreliably inside nested "load" commands
as well.  I think the problem was introduced when the lf_push()/
lf_pop() code was revised, but I'm not sure whether the interaction
with block constucts is a consequence or a separate bug.

	Ethan

 
> I have a test file:
> 
> test_val=0
> if (test_val != 1) {print "*** an error was found ; exit without 
> plotting sine ***" ; exit; print "end of if"}
> plot sin(x);
> print "no errors, sine was plotted";
> 
> 
> when I load this from gnuplot  DO get the plot of sine and the following 
> output :
> 
> gnuplot> load "test.gnu"
> *** an error was found ; exit without plotting sine ***
> no errors, sine was plotted
> gnuplot>
> 
> 
> help exit :
> 
>  >>
>   The commands `exit` and `quit`, as well as the END-OF-FILE character 
> (usually
>   Ctrl-D) terminate input from the current input stream: terminal 
> session, pipe,
>   and file input (pipe).
> 
>   If input streams are nested (inherited `load` scripts), then reading will
>   continue in the parent stream.
>  >>
> 
> 
>  From this I was expecting exit to exit from the loaded script and 
> return me to the gnuplot prompt.
> 
> Instead only seems to have exited from the if block.
> 
> Does the doc need clarifying or is this an unintended consequence of the 
> new blocked if structures?
> 
> regards, Peter.
> 
> 
> 
> 
> 
> 
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-- 
Ethan A Merritt
Biomolecular Structure Center,  K-428 Health Sciences Bldg
University of Washington, Seattle 98195-7742