If I understand correctly, this should do:
function myfunc{T<:Vector}(v::Nullable{T})
...
end
On Tue, 2015-07-21 at 22:37, Darwin Darakananda <darwinda...@gmail.com> wrote:
> Hi all,
>
> I'm in the process of replacing my Union{Nothing, T} annotations to
> Nullable{T}, but I'm getting stuck when T is a parametric type. For
> example, replacing the function
>
> function myfunc(v::Union{Nothing, Vector})
> ...
> end
>
> with
>
> function myfunc(v::Nullable{Vector})
> ...
> end
>
> makes it completely uncallable since any vector I pass in comes with an
> eltype parameter and Julia's type parameters are invariant. For functions
> or types that only have a couple Nullable types, I can do something like
>
> function myfunc{T}(v::Nullable{Vector{T}})
> ...
> end
>
> type MyType{T}
> v::Nullable{Vector{T}
> end
>
> but that gets very ugly when you have a large number of nullable types.
> Does anyone know of a cleaner way to do this?
>
> Thanks,
>
> Darwin
