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view gcc/testsuite/g++.dg/template/sfinae22.C @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 04ced10e8804 |
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// PR c++/44908 // { dg-do compile { target c++11 } } #include <utility> struct A { }; struct B : public virtual A { }; template<typename From, typename To> class mini_is_convertible { typedef char one; typedef struct { char arr[2]; } two; template<typename To1> static void test_aux(To1); template<typename To1, typename From1> static decltype(test_aux<To1>(std::declval<From1>()), one()) test(int); template<typename, typename> static two test(...); public: static const bool value = sizeof(test<To, From>(0)) == 1; }; template<typename From, typename To> const bool mini_is_convertible<From, To>::value; static_assert (!mini_is_convertible<int (B::*) (int), int (A::*) (int)>::value, ""); static_assert (!mini_is_convertible<int (B::*), int (A::*)>::value, ""); static_assert (!mini_is_convertible<int (A::*) (int), int (B::*) (int)>::value, ""); static_assert (!mini_is_convertible<int (A::*), int (B::*)>::value, "");