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111
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1 // { dg-do run }
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2 // Ensure that virtual base upcast and downcasting works on this
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3 // conversions during virtual function dispatch at ctor/dtor time
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4 // when dynamic vtable fixups for deltas are needed.
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5
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6 int fail = 0;
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7
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8 struct BASE1 {
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9 virtual ~BASE1 () { }
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10 };
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11
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12 class MID;
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13
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14 class BASE2 {
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15 public:
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16 virtual MID *VFN (){ return 0; }
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17 };
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18
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19 class MIBASE : public BASE1, public BASE2 { };
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20
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21 class VBB : public MIBASE {
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22 public:
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23 virtual long get_STATE () const = 0;
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24 void print_STATE() { if (get_STATE () != 87654321) fail = 1; }
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25 };
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26
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27 class VBD : public virtual VBB {
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28 long STATE;
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29 public:
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30 long get_STATE() const { return STATE; }
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31 VBD() { STATE = 87654321; }
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32 ~VBD() { STATE = 87654321; }
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33 };
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34
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35 class MID : public virtual VBD {
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36 public:
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37 MID () { print_STATE(); }
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38 ~MID () { print_STATE(); }
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39 virtual MID *VFN() { return this; }
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40 };
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41
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42 class LAST : public MID {
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43 public:
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44 LAST () { print_STATE(); }
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45 ~LAST () { print_STATE(); }
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46 };
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47
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48 int main() {
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49 MIBASE *o = new LAST;
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50 MID *p = o->VFN();
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51 p->print_STATE();
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52 delete o;
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53 return fail;
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54 }
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