Broadcasting over a struct with two arrays

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Customizing Broadcasting Recursively for Collections of Arrays

I previously asked this question and am aware of the section in the manual about customizing broadcasting. However, rather than defining a new type which behaves like a single array, I would like to define broadcasting recursively for types which contain several arrays (or types which are themselves collections of arrays). That is, imagine we have struct A{T so that broadcasting is already defined for T} a::T b::T end If x::A, y::A, calculate z = x .+ y by calling z.a = x.a .+ y.a (etc.). …