On the subject of rebindable, what about: const Object o; // not rebindable, the whole thing is set once and const const(Object) o; // the Object is const, but the reference is not.
So, everything is rebindable unless the declaration has a const/immutable on the outside. int a; // rebindable (obviously) const(int) a; // the int never changes... but the variable a might. Meaningless for a value type, but makes sense for a reference type const int a; // the whole thing is set once and never changes. The const applies to the variable a itself, but the transitive property propagates it down to the int type too.
