Matrix multiplication makes all dimensions dynamic

[plut]

    using StaticArrays, HybridArrays    
    typeof(SA[1 0;0 1]*HybridArray{Tuple{2,StaticArrays.Dynamic()}}([1 0;0 1]))

Returns Array{Int64,2}. However it can be determined at compile-time that this is actually a 2*n matrix, hence HybridArray{Tuple{2,StaticArrays.Dynamic()}}.

[mateuszbaran]

Good point, I'm just not sure how to do it right. LoopVectorization.jl has quite a bit of related functionality that can use static dimensions of arrays so just multiplying wrapped arrays and wrapping the result doesn't look like the best solution.