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1 // PR c++/71738
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2
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3 template < class > struct S
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4 {
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5 template < class > struct A
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6 {
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7 template < class > struct B
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8 {
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9 template <class Z>
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10 void operator=(Z) { S::i = 0; }
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11 };
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12 };
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13
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14 // Note that this friend declaration is useless, since nested classes are
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15 // already friends of their enclosing class.
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16 template < class X >
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17 template < class Y >
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18 template < class Z >
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19 friend void A < X >::B < Y >::operator= (Z);
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20
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21 private:
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22 static int i;
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23 };
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24
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25 int main()
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26 {
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27 S<int>::A<int>::B<int> b;
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28 b = 0;
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29 }
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