Conversion from array

[cstjean]

What would you say to supporting convert(Fill, [2.0,2.0,2.0]), and throwing an error if it's not uniformly the same value?

[cstjean]

I can see an issue with empty vectors: convert(Fill, String[]). We can use Fill("any string", 0). But how do we get an instance of some arbitrary type T, to put in the value field? one(T)/zero(T)/... might not be defined.

Solution 1: use #undef, which we could do if the inner constructor could call new(axes=axes), but new doesn't do that yet. So we'd have to shuffle the field order so that value can be #under, which is unappealing.

Solution 2: have a function any_value(::Type{T}) where T<:Number = oneunit(T), that gives us that value. It works, but it's ugly.

Solution 3: throw an error on empty vectors.

Do you see anything else?

[dlfivefifty]

Just throw an error I think. Though I’m not sure what the use case for this is.

Note you should also add variants like convert(AbstractFill{T} , v)