How to call opCall as template?

[Namespace]

On Thursday, 30 January 2014 at 18:11:49 UTC, Frustrated wrote:
> BTW,
>
> a() is replaced with a.opCall()
>
> and you can use opDispatch on it.
>
> an opCall is a member.
>
> Either approach should work if you can get that archive example
> to compile.

I am sure that the error is thrown before.
But please show me your attempts.