Test OrdinaryDiffEq suing Vector

test_mvector.jl

using OrdinaryDiffEq
using StaticArrays

mutable struct SimWorkspace{T} <: DEDataVector{T}
    x::MVector{2,T}
    a::T
end

function dyn!(du,u,p,t)
    du .= [0 1;
           0 0]*u + [0;1]*u.a

    u.a = t
end

s0   = SimWorkspace{Float64}(MVector{2,Float64}(0,0),1.)
prob = ODEProblem(dyn!, s0, (0.,10.) )
sol  = solve(prob,Tsit5())