[julia-users] Method parameters and union types

[David Gold]

I want the following function

function t_or_void{T}(::Type{Union(T, Void)})
    return T
end

to work like this:

julia> t_or_void(Union(Int, Void))
Int64

But in reality, it does this:

julia> t_or_void(Union(Int, Void))
UnionType

Is there a way to make this work, or a way to extract T from Union(T, 
Void)? The 'Void' isn't special -- it could be any determinate type.

Thanks,
D