[Octave-bug-tracker] [bug #54465] Short Circuit Operators not working with negation operator

[Rik]

Update of bug #54465 (project octave):

                  Status:                    None => Confirmed              
                 Release:                   4.2.1 => dev                    
                 Summary: Short Circuit Operators not working for ~functions
=> Short Circuit Operators not working with negation operator

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Follow-up Comment #1:

Confirmed.  Incidentally, version 4.2.1 is very old and no longer supported. 
You will have a better experience if you can update to the latest stable
version.  But, I confirmed this on the current development code as well.

Here is an even more concise example:


clear b;

if ((! 0) || b == 2)
  disp ('Octave short-circuit');
end

if ((! 0) | b == 2)
  disp ('Matlab short-circuit');
end


I used Octave's own negation operator just to make sure there wasn't something
funny going on.  I also removed the call to exist() and just use a constant. 
Octave's own short-circuiting operator works in this case, so this is an error
in the parser because within if statements the '|' operator should map to '||'
for logical statements.

Adding jwe to the CC list since he has spent the most time with this code.  



(file #44741)
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