From bug-octave-request at bevo dot che dot wisc dot edu  Fri Jan 28 15:37:06 2000
Subject: Some problems
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Hagen Gilsing <gilsing at informatik dot hu-berlin dot de>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Fri, 28 Jan 2000 15:37:32 -0600 (CST)

On 20-Feb-1999, Hagen Gilsing <gilsing at informatik dot hu-berlin dot de> wrote:

| octave-2.1.12:1> clear;OCTAVE_VERSION
| OCTAVE_VERSION = 2.1.12
| ans = 2.1.12
| octave-2.1.12:2> counter=12
| counter = 12
| octave-2.1.12:3> while(counter>0) try x=y catch counter--;break;end_try_catch;endwhile
| octave-2.1.12:4> counter
| counter = 0
| octave-2.1.12:5>
| 
| I think, the break-command in the catch-block should terminate the while-loop, i.e.
| the statement
|   while(counter>0) try x=y catch counter--;break;end_try_catch;endwhile
| should be semantically equivalent to
|   while(counter>0) counter--;break;endwhile
| .
| 
| octave-2.1.12:1> clear;OCTAVE_VERSION
| OCTAVE_VERSION = 2.1.12
| ans = 2.1.12
| octave-2.1.12:2> counter=12
| counter = 12
| octave-2.1.12:3> while(counter>0) try error('interrupt');catch counter--;break;end_try_catch;endwhile
| octave-2.1.12:4> counter
| counter = 0
| octave-2.1.12:5> 
| 
| I think, theese lines demonstrate, that the problem is independent of the exception,
| that causes the error.

I've modified the current development sources so that Octave will
behave as you expect.  I think this makes sense, that a break inside a
try-catch block should behave just as it would in the absence of the
try-catch block, instead of just jumping to the end of the try-catch
block.

Thanks,

jwe



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