Ways to initialize static arrays

[Stanislav Blinov]

  23.08.2010 16:31, bearophile wrote:
> Stanislav Blinov:
>
>> I was wondering if anyone has suggestions on performing arbitrary
>> initialization of static arrays, size of which is arbitrary at compile time.
> Please explain your purposes a bit better.
>
I have a struct template (let's call it S) that wraps an array of N 
elements. N is set at compile time via template parameter. S uses static 
array as storage (T[N]). I need a set of constants of type S which I'd 
like to be evaluatable at compile time. I can create these constants 
with the following constructs:

static immutable S C1 = { /* initialization of struct fields here */ };
static immutable S C2 = { /* initialization of struct fields here */ };

Hence, I need some way to initialize a field which is T[N].

Later, I could use those constants like this:

class Foo
{
     S s1_ = S.C1;
     S s2_ = S.C2;
}

I can write a set of initializers for some values of N, but I'd like 
them to be generic so that I could apply them for arbitrary value of N.
E.g. one can do things like T[3] a = [ 1, 2, 3 ], but I'd like to be 
able to do T[N] = SomeInitializerForArrayOfNElements;

What I'm trying to achieve is:

1. Initialize T[N] elements to a specific value.
2. Initialize every element of T[N] to some value deduced at compile 
time using it's index.

I came up with the templates in my initial post. They seem to work, but 
I doubt those are legal solutions.