lindquist@114: module classes9;
lindquist@114: 
lindquist@114: class C
lindquist@114: {
lindquist@114: }
lindquist@114: 
lindquist@114: class D : C
lindquist@114: {
lindquist@114: }
lindquist@114: 
lindquist@114: class E
lindquist@114: {
lindquist@114: }
lindquist@114: 
lindquist@114: class F : E
lindquist@114: {
lindquist@114: }
lindquist@114: 
lindquist@114: void main()
lindquist@114: {
lindquist@114:     {
lindquist@114:         D d = new D;
lindquist@114:         {
lindquist@114:             C c = d;
lindquist@114:             assert(c !is null);
lindquist@114:             D d2 = cast(D)c;
lindquist@114:             assert(d2 !is null);
lindquist@114:             E e = cast(E)d;
lindquist@114:             assert(e is null);
lindquist@114:             F f = cast(F)d;
lindquist@114:             assert(f is null);
lindquist@114:         }
lindquist@114:     }
lindquist@114:     {
lindquist@114:         F f = new F;
lindquist@114:         {
lindquist@114:             E e = f;
lindquist@114:             assert(e !is null);
lindquist@114:             F f2 = cast(F)e;
lindquist@114:             assert(f2 !is null);
lindquist@114:             C c = cast(C)f;
lindquist@114:             assert(c is null);
lindquist@114:             D d2 = cast(D)f;
lindquist@114:             assert(d2 is null);
lindquist@114:         }
lindquist@114:     }
lindquist@114: }