Einstein summation library

[klknn]

On Monday, 16 January 2023 at 10:00:53 UTC, Zenw wrote:
> https://code.dlang.org/packages/gged/~main
>
> I have been working on extending the functionality of 
> multidimensional arrays using mir.ndslice, and now einstein 
> summation is available.
>
> It may not be practical, but it can be described nicely, like 
> below, so I will introduce this.
>
> ```D
>     auto A  = iota(9.).array.gged!double(3,3);
>     auto x  = iota(3.).gged!double(3);
>     auto Ax = Einsum | A.ij*x.j; // [5, 14, 23]
> ```

Very nice. Do you plan to make it `@nogc nothrow` like 
mir-algorithm?