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114
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1 module classes9;
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2
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3 class C
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4 {
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5 }
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6
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7 class D : C
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8 {
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9 }
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10
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11 class E
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12 {
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13 }
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14
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15 class F : E
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16 {
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17 }
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18
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19 void main()
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20 {
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21 {
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22 D d = new D;
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23 {
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24 C c = d;
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25 assert(c !is null);
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26 D d2 = cast(D)c;
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27 assert(d2 !is null);
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28 E e = cast(E)d;
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29 assert(e is null);
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30 F f = cast(F)d;
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31 assert(f is null);
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32 }
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33 }
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34 {
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35 F f = new F;
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36 {
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37 E e = f;
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38 assert(e !is null);
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39 F f2 = cast(F)e;
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40 assert(f2 !is null);
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41 C c = cast(C)f;
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42 assert(c is null);
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43 D d2 = cast(D)f;
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44 assert(d2 is null);
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45 }
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46 }
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47 }
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