UFCS not working with alias

[Andre Pany via Digitalmars-d-learn]

On Thursday, 8 September 2016 at 13:38:54 UTC, Steven 
Schveighoffer wrote:
>
> There is a workaround, identified by Vladimir Panteleev 
> (https://blog.thecybershadow.net/2015/04/28/the-amazing-template-that-does-nothing/):
>
>
> import std.algorithm;
> bool fulfillsKeyPredicate(string s, string t) {return true;}
>
> alias I(alias x) = x;
>
> void main(string[] args)
> {
>     alias keyPredicateFilter = filter!(e => 
> e.fulfillsKeyPredicate(args[0]));
>     string[] arr;
>
>     keyPredicateFilter(arr);
>     arr.I!keyPredicateFilter;
> }
>
> Unfortunately, you can't alias the I!someSymbol, as that has 
> the same problem.
>
> -Steve

Thanks for this insight. In my case I prepare a presentation 
about D
(audience doesn't now anything about D)
and tried to make my D code as beautiful as possible. As solution
I created now a free template method and hide it in a library 
module.

T[] filterByKeyPredicate(T)(T[] arr, string[string] keyPredicate)
{
...filter!....
}

This way I can use UFCS.

Kind regards
André