Passing struct with Union type to other function

General Usage Performance
, ,
2

How about this?

@with_kw struct Par1{T<:Union{Float64, VecOrMat{Float64}}}
    D::T = 5.0
    G::Float64 = 1.0
    dims::Int64 = 1
    Nx::Int64 = 256
    Lx::Float64 = 1.0
    x0::Float64 = 0.0
    x = range(x0, x0+Lx, length=Nx+1)[1:end-1]
    dx::Float64 = x[2] - x[1]
    order::Int64 = 2
end

Note that in your current struct, x also seems to have an undetermined type (Any if I’m correct)