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1 // PR c++/44908
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2 // { dg-do compile { target c++11 } }
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3
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4 #include <utility>
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5
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6 struct A { };
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7
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8 struct B
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9 : public virtual A { };
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10
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11 template<typename From, typename To>
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12 class mini_is_convertible
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13 {
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14 typedef char one;
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15 typedef struct { char arr[2]; } two;
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16
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17 template<typename To1>
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18 static void test_aux(To1);
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19
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20 template<typename To1, typename From1>
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21 static decltype(test_aux<To1>(std::declval<From1>()), one())
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22 test(int);
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23
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24 template<typename, typename>
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25 static two test(...);
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26
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27 public:
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28 static const bool value = sizeof(test<To, From>(0)) == 1;
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29 };
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30
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31 template<typename From, typename To>
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32 const bool mini_is_convertible<From, To>::value;
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33
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34 static_assert (!mini_is_convertible<int (B::*) (int),
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35 int (A::*) (int)>::value, "");
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36 static_assert (!mini_is_convertible<int (B::*), int (A::*)>::value, "");
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37 static_assert (!mini_is_convertible<int (A::*) (int),
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38 int (B::*) (int)>::value, "");
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39 static_assert (!mini_is_convertible<int (A::*), int (B::*)>::value, "");
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