OpenEuphoria

Re: Idea for 'documenting' unused values

• Posted by "Juergen Luethje" <j.lue at gmx.de> Jul 24, 2004
• 511 views

Derek Parnell wrote:

> irv mullins wrote:
>>
>> Mike Nelson wrote:
>>>
>>> Derek's idea of an ignore() procedure is excellent in terms of being
>>> self-documenting. If it were implemented in the interpreter, the overhead of
>>> the procedure call could be optimized away, just as is done for then
>>> platform() function.
>>
>> Perhaps I misunderstand the problem, but isn't this about unused parameters
>> (which must nevertheless be included as placeholders) causing warnings?
>
> No. It is *also* about unused function return values, not just unused
> parameters.
>
>> If that is the case, then Euphoria should provide a dummy type to be used
>> as a placeholder, one which wouldn't generate the warning. Should be
>> easy to implement.
>
> I guess you mean something like ...
>
>   procedure Click_Button(integer self, ignore, ignore)
>    . . .
>   end procedure
>
>
> This is a nice idea too.

Agreed, very nice and straightforward. To make this even more
self-documenting, I think I would prefer something like this:

procedure Click_Button(integer self, ignore event, ignore parms)
 . . .
end procedure

I believe this would also require less changes in the Euphoria parser.

> We could expand it to something similar for
> function returns...
>
>    void = FuncA()

Maybe the same reserved word could be used to serve this purpose?

    ignore = FuncA()

For me as a layman, it looks as if changes in the Euphoria syntax like
these are rather easy to implement. Maybe we can see them already in Eu
2.5? 

Regards,
   Juergen