Alias parameter predicates considered harmful?

[Vladimir Panteleev]

On Saturday, 20 March 2021 at 01:03:39 UTC, Paul Backus wrote:
> Here's an idiom I've found useful in situations like this:
>
> /// Pass struct members as arguments to a function
> alias apply(alias fun) = args => fun(args.tupleof);

Thank you. This is indeed a good trick.

> auto fun() @nogc
> {
>     int toAdd = 1;
>     return iota(10)
>         .zip(repeat(toAdd))
>         .map!(apply!((n, toAdd) => n + toAdd));
> }

Using `repeat` to pass data to range predicates feels dirty and 
wrong, though. :)