There is no proper way to do this. But note that your suggestion below
is not any more performant than just not typing the field. You could
check in the constructor whether the type can be iterated on:
immutable Test{T}
a::T
function Test(a)
@assert eltype(a)<:Integer
tmp = [aa in
Hi,
say I want to define a custom type with a field that accepts any kind of
iterable integer type as valid input (both 1:3 as well as collect(1:3)),
how would I do that in the most generic way? I know that I can use
type test{T<:integer}
a::Union{Range{T},Vector{T}}
end
But there might be
