#dbugfix Issue 16486 200$

[jmh530]

On Friday, 30 March 2018 at 06:11:22 UTC, 9il wrote:
> [snip]
>
> They are used in mir-lapack [5]. The bug fix also required for 
> mir (Sparse, CompressedTensor), and for the future Dlang image 
> library.

I was experimenting with one of the open methods matrix examples 
[1] and trying to replace the virtual methods with templates. My 
example [3] does it statically and with structs so that it could 
be used with mir. However, the moment you try to make it a little 
bit more complicated and allow the type of the underlying matrix 
data to be templated, then it hits up against this issue and you 
can't rely on aliases any more.

I would support a DIP.

[1] 
https://github.com/jll63/openmethods.d/tree/master/examples/matrix/source

[2] 
http://www.di.unipi.it/~nids/docs/templates_vs_inheritance.html

[3] https://run.dlang.io/gist/9da210e321af95e1ce373b5a6621e4f8