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111
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1 // { dg-do run { target c++14 } }
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2
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3 // pr c++/66443 a synthesized ctor of an abstract class that's deleted
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4 // only because of virtual base construction doesn't stop a derived
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5 // class using it as a base object constructor (provided it has a
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6 // suitable ctor invocation of the virtual base).
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7
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8 static int a_made;
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9
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10 struct A {
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11 A *m_a = this;
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12 A (int) { a_made++; }
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13 };
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14
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15 struct B : virtual A {
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16 A *m_b = this;
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17 virtual bool Ok () = 0; // abstract
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18 };
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19
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20 struct C : B {
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21 // C::m_c is placed where a complete B object would put A
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22 int m_c = 1729;
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23 public:
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24 C();
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25 virtual bool Ok ();
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26 };
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27
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28 bool C::Ok ()
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29 {
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30 // check everyone agreed on where A is
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31 return a_made == 1 && m_a == this && m_b == this && m_c == 1729;
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32 }
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33
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34 C::C ()
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35 : A (1) // Explicit call of A's ctor
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36 { }
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37
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38 bool Ok (C &c)
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39 {
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131
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40 return true;
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111
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41 }
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42
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43 int main ()
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44 {
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45 C c;
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46
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47 return !c.Ok ();
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48 }
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