inferred size for static array initialization

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On Monday, 2 May 2016 at 13:00:27 UTC, Erik Smith wrote:
> Is there a way to initialize a static array and have it's size 
> inferred (and that works for arrays of structs using braced 
> literals)?  This would make it easier to maintain longer static 
> array definitions.  The code below doesn't work when removing 
> the array size even though the array is declared as static 
> immutable.
>
>     import std.traits;
>     static immutable int[] a  = [1,2,3];
>     static assert(isStaticArray!(typeof(a)));  // fails

I still like
----
auto s(T, size_t n)(T[n] arr) {
	return arr;
}

auto arr = [1, 2, 3].s;
----

But of course this won't work:
----
int[] a  = [1,2,3].s;
static assert(isStaticArray!(typeof(a)));  // fails
----

Since 'a' is just a slice.

But this will work:
----
immutable auto a  = [1,2,3].s;
----