Remove some redundancy from the DValue hierarchy: all subclasses had a 'type' field and identical implementations of virtual function getType(). Move these to DValue itself, and make getType() non-virtual.

extern(C) int printf(char*, ...);

static this()
{
    printf("static this\n");
}

static ~this()
{
    printf("static ~this\n");
}

void main()
{
    printf("main\n");
}