How to create a struct that contains an SVector of structs?

General Usage
5

This works:

using StaticArrays, Parameters
import Base.zero

const SEGMENTS = 6

# struct, defining the phyical parameters of one spring
@with_kw mutable struct Spring{I, S}
    p1::I = 1         # number of the first point
    p2::I = 2         # number of the second point
    length::S = 1.0   # Current unstressed spring length
    c_spring::S = 1.0 # 
    damping::S  = 0.1 # 
end

const SP = Spring{Int16, Float64}

function zero(::Type{SP})
    s = SP()
    s.p1 = 0
    s.p2 = 0
    s.length = 0.0
    s.c_spring = 0.0
    s.damping = 0.0
    s
end

@with_kw mutable struct KPS4{S, P, Q, SP} 
    masses::MVector{P, S}      = ones(P)
    springs::SVector{Q, SP}    = zeros(SP, Q)
end

function KPS4()
    KPS4{Float64, SEGMENTS+1, SEGMENTS, SP}()
end

kps = KPS4()

Slightly inconvenient, but not much…

Thanks a lot!

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