h[v]cat nonsense with julia arrays

[thofma]

I am not sure if we want to support h[v]cat with julia arrays, but at the moment it gives garbage:

julia> vcat(ZZ[5 6; 5 2], [1 2])
2×2 Matrix{Any}:
  [5 6; 5 2]   [5 6; 5 2]
 1            2

julia> vcat(ZZ[5 6; 5 2], [1 2; 3 4])
3×2 Matrix{Any}:
  [5 6; 5 2]   [5 6; 5 2]
 1            2
 3            4

[wbhart]

Ergh! I guess it shouldn't do that, even if we didn't want to support it.

[wbhart]

Oh I see, this is a Julia function doing this, because they don't type their inputs to Matrix. So it accepts our matrix type which is close enough to the Julia interface that this actually succeeds, with a Matrix{Any}.

How do you propose to deal with it? Just a function that accepts one of our matrices and one of theirs and raises an exception?

[thofma]

I don't know yet. The problem is that julia treats our matrices like anything else:

julia> vcat("x", [1 2])
2×2 Matrix{Any}:
  "x"   "x"
 1     2

julia> vcat("x", [1 2; 3 4])
3×2 Matrix{Any}:
  "x"   "x"
 1     2
 3     4

[wbhart]

Yeah, understandable, but inevitably yuck.