Aliasing of template results

sclytrack sclytrack at fake.com
Sun Jan 22 10:00:22 PST 2012


On 01/22/2012 03:51 PM, Alex Rønne Petersen wrote:
> Hi,
>
> Someone on IRC wanted to know the element type of an array type and the
> following code was suggsted:
>
> template ElementType(T : T[])
> {
> alias T ElementType;
> }
>
> He was confused about how ElementType!(int[]) could possibly equal int,
> until we explained that the alias does, in fact, represent the 'result'
> of the template.
>
> So we started discussing whether a more intuitive syntax could be found.
> Someone suggsted:
>
> template ElementType(T : T[])
> {
> alias T template;
> }
>
> I personally believe this makes it perfectly clear that you're aliasing
> the template itself to T.
>
> Thoughts?
>

https://github.com/PhilippeSigaud/D-templates-tutorial

BaseElementType maybe. I've just scan-read it.



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