Avoiding rewriting accessor methods for new composite types with similar fields

[hendri54]

Lazy.jl has a @forward macro that simplifies this:

Confused with type definition

I am kinda surprised nobody mentioned Lazy.jl and its macro @forward. Basically you can do: import Base: length, getindex, setindex using Lazy: @forward struct MyVec <: AbstractVector{Float64} v::Vector{Float64} # same as Array{Float64, 1} end @forward MyVec.v Base.size, Base.getindex, Base.setindex! For all function you just delegate to the field.