My first instinct would be to make an immutable composite type: http://docs.julialang.org/en/release-0.4/manual/types/#immutable-composite-types <http://www.google.com/url?q=http%3A%2F%2Fdocs.julialang.org%2Fen%2Frelease-0.4%2Fmanual%2Ftypes%2F%23immutable-composite-types&sa=D&sntz=1&usg=AFQjCNGguGwk5NkWdGtud5X4o_gjK6n6_g>
immutable House
x::Int
y::Int
end
