aliases and templates

Jarrett Billingsley jarrett.billingsley at gmail.com
Thu Jan 22 08:29:51 PST 2009


On Thu, Jan 22, 2009 at 10:56 AM, Trass3r <mrmocool at gmx.de> wrote:
> I already read about "Implicit Template Properties":
> If a template has exactly one member in it, and the name of that member is
> the same as the template name, that member is assumed to be referred to in a
> template instantiation
>
> I guess the following is something similar, but why are aliases used here?
>
> template ParameterTypeTuple(dg)
> {
>    static if (is(dg P == function))
>        alias P ParameterTypeTuple;
>    else static if (is(dg P == delegate))
>        alias ParameterTypeTuple!(P) ParameterTypeTuple;
>    else static if (is(dg P == P*))
>        alias ParameterTypeTuple!(P) ParameterTypeTuple;
>    else
>        static assert(0, "argument has no parameters");
> }
>

Aliases are members too.


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