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struct Name{T} | |
name::T | |
end | |
struct Arr{T, N} <: AbstractArray{T, N} | |
data::Array{T, N} | |
end | |
Base.size(A::Arr) = size(A.data) | |
Base.axes(A::Arr) = axes(A.data) | |
Base.getindex(A::Arr, i::Int) = A.data[i] | |
Base.getindex(A::Arr{T, N}, I::Vararg{Int, N}) where {T, N} = A.data[I...] | |
resolve_index(A, i) = i | |
resolve_index(A, i::Name) = i.name | |
function Base.to_indices(A::Arr, inds, I::Tuple{Any, Vararg{Any}}) | |
I′ = Tuple(resolve_index(A, i) for i in I) | |
to_indices(A.data, inds, I′) | |
end | |
function Base.getindex(A::Arr{T, N}, I::Vararg{Any}) where {T, N} | |
# Resolve any names to indices into the underlying array | |
I′ = to_indices(A, I) | |
A.data[I′...] | |
end | |
a = Arr([1 2; 3 4]) | |
a[2] # => 2 | |
a[Name(2)] # => 2 | |
# You may need to `]add https://github.com/mbauman/InvertedIndices.jl` | |
using InvertedIndices | |
a[Not(2)] # => error | |
a[Not(Name(2))] # => error |
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