Inconsistency between zero(x) and zero(T::Type) for matrices

[stevengj]

@Tbl

Maybe there is a reason for this, but for me it seems to be very unintuitive. Similar thing happens for function one and consequently prod .

The basic reason is that the size of the matrix is not encoded in the type. (If you use an SMatrix it works fine, in contrast, because StaticArrays include the size in the type.)