Parameterized Structs

[Peter Lundgren]

Where can I go to learn about parameterized structs? I can't seem to find any
literature on the subject. In particular, what are you allowed to use as a
parameter? I would like to define a struct like so:

struct MyStruct(T, T[] a) {
    ...
}

but I receive the following error:

Error: arithmetic/string type expected for value-parameter, not T[]

Are arrays not allowed?