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digitalmars.D - How to initialize immutable global static array?

I want to create an immutable global static array, which should be initialized
in a static this() statement at program startup, or at compile time using
CTFE.  This can be done for dynamic arrays, since an immutable array can be
assigned to once in a static constructor, and can be returned from a CTFE
function, but I don't see how to do it for a static array.  Basically I want
something like this:

immutable ubyte[SOMECONSTANT] foo;
static this() {
    // Create array and assign it to foo, and then have foo be  immutable.


immutable ubyte[SOMECONSTANT] foo = someCTFEFunction(someArgument);
Feb 20 2009