const argument

[TSalm]

Le Sat, 28 Mar 2009 12:21:52 +0100, Jarrett Billingsley  
<jarrett.billingsley at gmail.com> a écrit:

> On Sat, Mar 28, 2009 at 6:12 AM, TSalm <TSalm at free.fr> wrote:
>> Hello,
>>
>> Is there a way to specifie a constant argument ( I would say an  
>> argument for
>> which his value is evaluate at compile time )
>>
>> For example, something like this :
>>
>> /* -------- CODE --------- */
>> import tango.io.Stdout;
>>
>> void func(const bool constArg)
>> {
>>    static if (constArg)
>>        Stdout("Yes").newline;
>>    else
>>        Stdout("No").newline;
>> }
>>
>> void main()
>> {
>>    func( true );
>>    func( false );
>> }
>> /* -------- END CODE --------- */
>
> You have to do it with templates:
>
> void func(bool constArg)()
> {
>     static if(constArg) ... else ...
> }
>
> func!(true)();
> func!(false)();
>
Thanks.

> Walter suggested, in the D2 presentation at the conference in 2007,
> that there should be "static" parameters which would work the way your
> code should work.
good idea IMO.