I'm interested in being able to do zero-copy concatenation of AbstractArrays, with something similar to ArrayViews, but in reverse:
x = rand(4,2) y = rand(4,2) z = hcatview(x,y) # "view" that is able to index into hcat(x,y) without creating the temporary matrix x[1,1] = 10.0 @assert z[1,1] == x[1,1] Does this exist already somewhere? If I was to build it, should I submit a PR to somewhere (ArrayViews?) or start a new package? One of many uses is to generate a large block matrix, potentially composed of both dense and sparse matrices. Bonus points if I can get a ContiguousView when "view(z, 1:3, 4:5)" refers to a range that is totally encapsulated by a dense child matrix.
