Is code vaguely like this meaningful and useful?


void main() {
    alias (x => x ^^ 2) sqrTemplate;
}


Bye,
bearophile

On 01/18/2012 01:35 AM, bearophile wrote:
> Is code vaguely like this meaningful and useful?
>
>
> void main() {
>      alias (x =>  x ^^ 2) sqrTemplate;
> }
>
>
> Bye,
> bearophile

Yes. The fact that your particular example does not work is a mere syntactic issue.
This works:

template ID(alias a){alias a ID;}
void main(){
    alias ID!(x => x ^^ 2) sqrTemplate;
}

Timon Gehr:

> Yes. The fact that your particular example does not work is a mere
> syntactic issue.
> This works:
> 
> template ID(alias a){alias a ID;}
> void main(){
>      alias ID!(x => x ^^ 2) sqrTemplate;
> }

Thank you Timon, you are often good :-)
I'll add it as enhancement request.

Bye,
bearophile

On Wed, Jan 18, 2012 at 02:06, bearophile <bearophileHUGS@lycos.com> wrote:

>> template ID(alias a){alias a ID;}
>> void main(){
>>      alias ID!(x => x ^^ 2) sqrTemplate;
>> }
>
> Thank you Timon, you are often good :-)
> I'll add it as enhancement request.

This limitation (not being able to alias a lambda) is quite irksome. If you do an enhancement request, could you also add one for:

alias __traits(whatever, whatever) some Result;

Right now, the alias grammar doesn't allow this and I find this limitation jarring.

Philippe Sigaud:

> This limitation (not being able to alias a lambda) is quite irksome. If you do an enhancement request, could you also add one for:
> 
> alias __traits(whatever, whatever) some Result;
> 
> Right now, the alias grammar doesn't allow this and I find this limitation jarring.

It's better to add it yourself: http://d.puremagic.com/issues/show_bug.cgi?id=7308

Bye,
bearophile