Chain two different struct specialization

[Andrea Fontana]

On Friday, 1 March 2013 at 14:27:40 UTC, Andrea Fontana wrote:
> I'm trying to do something like this. I don't know whether or 
> not it's a good idea, i'm open to solutions and suggestions
>
> struct MyStruct(WEIGHTS)
> {
>    string ...
>    string ...
>
>    alias WEIGHTS weights;
> }
>
> double likeness(T,T1)(ref in T1, ref in T2)
> {
>     // Here i do some complex calculus using struct fields
>     // and using weights consts
> }
>
> enum FirstWeights : double
> {
>
> }

Ops. Here the complete message:

I'm trying to do something like this. I don't know whether or not 
it's a good idea, i'm open to solutions and suggestions

struct MyStruct(WEIGHTS)
{
    string ...
    string ...

    alias WEIGHTS weights;
}

double likeness(T,T1)(ref in T1, ref in T2)
{
     // Here i do some complex calculus using struct fields
     // and using weights consts
}

enum FirstWeights : double
{
     double foo = 0.3,
     double bar = 0.4
}

enum SecondWeights : double
{
     double foo = 0.3,
     double bar = 0.4
}

so:
auto s1 = MyStruct!FirstWeights ...
auto s2 = MyStruct!SecondWeights ...

likeness(s1,s2); // works

But I can't mix different type (s1,s2) on a single range or 
array, to check for likeness, is there a way? (or should I avoid 
template init a double[] weights field)