[Scilab-Dev] legacy 5.x syntax deserves to be abandonned

[Samuel Gougeon]

Le 22/06/2018 à 10:28, Stéphane Mottelet a écrit :
> Hello,
>
> While fixing
>
> http://bugzilla.scilab.org/show_bug.cgi?id=15623
> http://bugzilla.scilab.org/show_bug.cgi?id=15624
>
> I discovered that gross syntax errors such as
>
> max(,), max(1,) mean(,)...
>
> are not trapped by the parser. As a consequence, tokens of type 
> internalType:ScilabVoid are given to the gateway in the input arguments.
>
> There are a lot of scilab functions which do not correctly handle 
> this. For example,
>
> max(1,) and atan(1,) crash Scilab
>
> max(,), gives a message about a missing overloading function for 
> ScilabVoid type.
>
> Why such an dumb syntax has been kept as valid in Scilab 6 ? Does even 
> somebody remember if there exist some legacy code needing this ?
>
> There is a potentially huge number of gateways to be fixed because of 
> this too permissive syntax.


If you consider the very close syntaxes like
myfun(a, , c)
or
myfun(, b, c)
also as too permissive and to be forbidden, then we would definitely 
disagree:

To me, they are to most handy way to skip an argument (obviously 
provided that myfun() handles it correctly).

Does your proposed patch also prevent them?

Samuel