OpenEuphoria

Re: Proposal for a (small) enhancement to the value() function.

• Posted by CChris <christian.cuvier at agriculture.gouv.fr> Jun 26, 2007
• 773 views

Bernie Ryan wrote:
> 
> CChris wrote:
> > 
> > Currently, value(), defined in get.e, takes a sequence and returns {status
> > code,
> > value read}.
> > The proposed enhancement is to return 
> > {status code,
> >  value read,
> >  number of characters read,
> >  number of leading whitespace characters}.
> > 
> > This can be done at the cost of creating a duplicated, slightly modified
> > copy
> > of the internal Get() function, so that performance won't be affacted at
> > all.
> > get() won't be affected, since where() will give you most of the same
> > information.
> > 
> > Any thoughts? issues? other suggestions?
> 
> 
> Chris:
> 
>  I would rather that value() function just return the value
>  instead of sequence. The failure should fail within function with
>  a message. In my experience of using the value() I have never taken
>  taken any other action to the failure of the function except report
>  the error and end my program. Why should a user have to write extra
>  testing code just to use a basic function. This testing becomes a
>  pain in the neck especially if do a great number of calls to value(). 
> 
> Bernie
> 
> My files in archive:
> WMOTOR, XMOTOR, W32ENGIN, MIXEDLIB, EU_ENGIN, WIN32ERU, WIN32API 
> 
> Can be downloaded here:
> <a
> href="http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan">http://www.rapideuphoria.co
m/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan</a>

Try please

function simple_value(sequence s)
s=value(s)
if s[1]!=GET_SUCCESS then
    crash_message("Error reading a value")
    abort(1)
else
    return s[2]
end if
end function    

This could even be added to get.e, if it is felt to be useful. However, I don't
like the idea of forcing a specific way to deal with errors inside a standard
library.

CChris