[julia-users] Different field type depending on parameter value

[Kristoffer Carlsson]

I think a simple example will explain better than I could myself.

What I want to do is something similar to:

immutable foo{1, T}
    data::Vector{T}
end

immutable foo{2, T}
    data::Matrix{T}
end

Just like you can specialize functions for different parameter value is 
there a way to specialize the type of the field for a specific parameter 
value.

What I reality want to do is to store second order symmetric tensors with a 
vector as data and fourth order symmetric tensors with a matrix as data.

But I still want to be able to have my type as SymmetricTensor{dimension, 
order}

// Kristoffer