Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/template/sfinae21.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// PR c++/44908 struct A { }; struct B : public virtual A { }; template<bool, typename T = void> struct enable_if { typedef T type; }; template<typename T> struct enable_if<false, T> { }; 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 typename enable_if<(sizeof(test_aux<To1>(From1()), 1) > 0), one>::type 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; int Test1[mini_is_convertible<int (B::*) (int), int (A::*) (int)>::value ? -1 : 1]; int Test2[mini_is_convertible<int (B::*), int (A::*)>::value ? -1 : 1]; int Test3[mini_is_convertible<int (A::*) (int), int (B::*) (int)>::value ? -1 : 1]; int Test4[mini_is_convertible<int (A::*), int (B::*)>::value ? -1 : 1];