[Scilab-Dev] [oldEmptyBehaviour()] displaying a warning message in both Scilab 5 and Scilab 6 behavior

[Samuel Gougeon]

Hello,

Le 07/04/2016 10:16, Clément David a écrit :
> Hello (again) Scilab devs,
>
> TLDR: I don't want to re-open the []+"" behavior change flame-war but just to remove a
>        warning on working Scilab 6 code and ask you about the merge timing.
>
>
> After the []+"" behavior change, the oldEmptyBehaviour has been introduced by Pierre-Aimé to ease
> the transition from Scilab 5 to Scilab 6. This will help user transitioning using the beta version
> and thanks to that we also fix some issues in Scilab itself.
>
> However, the current implementation display a warning in both Scilab 5 enforced and Scilab 6
> execution mode. I proposed a patchset [1] to remove the warning in the Scilab 6 execution mode but
> preserve it on the Scilab 5 mode (eg. after a call to oldEmptyBehaviour("on") ).
>
> What's your thought about this change ? should we pass it now or after the 6.0.0 release ? Is the
> beta cycle sufficient enough to manage the behavior change ?

I am afraid that i do not catch all what you mean.
With "Scilab 5 enforced execution mode", do you mean in  Scilab 6 with 
oldEmptyBehaviour("on") mode?
So, instead of using this mode to still ACCEPT and NOT warn users 
whether []+a is met, it would warn users,
while in oldEmptyBehaviour("off"), meeting []+a would no longer warn users?

If what i understand above is right: imo, enabling users to ignore this 
warning by masking it would be
quite "dangerous", because changing this behavior has consequences as 
serious as quiet.

BTW:
* This would be a first case of Switch-warning-on-specific-case 
application.
    To be discussed in the "upgrade warning() thread"
* The discussion with Eric and other users is not a flame-war. The more 
i modified my code about this feature,
    the more i thought that even if "[]+a == a" is not "logical", it is 
very handy, it does not hurt, and it prevents nothing.
    Removing it compels to add as many if/then/else. /And what for/?

Best regards
Samuel

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