Re: stupid Matlab-style short-circuit behavior for | and &

[Ben Abbott]

On Oct 9, 2010, at 5:48 AM, Søren Hauberg wrote:

> fre, 08 10 2010 kl. 16:36 -0400, skrev John W. Eaton:
>> On  8-Oct-2010, Jaroslav Hajek wrote:
>> 
>> | No, apparently I just didn't realize how stupid this is :) Your first
>> | solution was probably fine.
>> 
>> OK, I checked it in.  You can turn the feature on or off with
>> 
>>  do_braindead_shortcircuit_evaluation
>> 
>> By default there is a warning at parse time if an & or | expression is
>> found in the condition of a WHILE of IF statement.  You can disable
>> the warning with
>> 
>>  warning off Octave:possible-matlab-short-circuit-operator
>> 
>> If you start Octave with --traditional the feature is enabled and the
>> warning is disabled.
> 
> So, does that mean we do the brain-dead (i.e. Matlab compatible)
> evaluation by default or is it something you have to manually enable?
> 
> Søren

After starting Octave with no options ...

octave:1> which do_braindead_shortcircuit_evaluation
`do_braindead_shortcircuit_evaluation' is a built-in function

octave:2> do_braindead_shortcircuit_evaluation
ans = 0

It is off by default.

Ben